From b413153b59de43a272fc0f7cc10ebb2f585c4a77 Mon Sep 17 00:00:00 2001
From: Mario Zechner <badlogicgames@gmail.com>
Date: Thu, 22 May 2025 16:20:26 +0200
Subject: [PATCH] [Haxe] Synchronize documentation with reference
 implementation

---
 spine-haxe/spine-haxe/spine/BinaryInput.hx    |   3 +
 spine-haxe/spine-haxe/spine/BlendMode.hx      |   1 +
 spine-haxe/spine-haxe/spine/Bone.hx           |  87 +++++++++++-
 spine-haxe/spine-haxe/spine/BoneData.hx       |  20 +++
 spine-haxe/spine-haxe/spine/Color.hx          |   1 +
 spine-haxe/spine-haxe/spine/ConstraintData.hx |   8 ++
 spine-haxe/spine-haxe/spine/Event.hx          |   8 ++
 spine-haxe/spine-haxe/spine/EventData.hx      |   4 +
 .../spine-haxe/spine/HasTextureRegion.hx      |   6 +
 spine-haxe/spine-haxe/spine/IkConstraint.hx   |  27 +++-
 .../spine-haxe/spine/IkConstraintData.hx      |  17 +++
 spine-haxe/spine-haxe/spine/Inherit.hx        |   1 +
 spine-haxe/spine-haxe/spine/MathUtils.hx      |  46 ++++++-
 spine-haxe/spine-haxe/spine/PathConstraint.hx |  13 ++
 .../spine-haxe/spine/PathConstraintData.hx    |  15 +++
 spine-haxe/spine-haxe/spine/Physics.hx        |   5 +
 .../spine-haxe/spine/PhysicsConstraint.hx     |  10 ++
 .../spine-haxe/spine/PhysicsConstraintData.hx |   5 +
 spine-haxe/spine-haxe/spine/Poolable.hx       |   6 +
 spine-haxe/spine-haxe/spine/PositionMode.hx   |   4 +
 spine-haxe/spine-haxe/spine/RotateMode.hx     |   5 +
 spine-haxe/spine-haxe/spine/Sequence.hx       |   3 +
 spine-haxe/spine-haxe/spine/SequenceMode.hx   |   3 +
 spine-haxe/spine-haxe/spine/Skeleton.hx       | 108 ++++++++++++---
 spine-haxe/spine-haxe/spine/SkeletonData.hx   |  78 +++++++++--
 spine-haxe/spine-haxe/spine/Skin.hx           |  16 ++-
 spine-haxe/spine-haxe/spine/SkinEntry.hx      |   2 +
 spine-haxe/spine-haxe/spine/Slot.hx           |  27 +++-
 spine-haxe/spine-haxe/spine/SlotData.hx       |  11 ++
 spine-haxe/spine-haxe/spine/SpacingMode.hx    |   3 +
 .../spine-haxe/spine/TransformConstraint.hx   |  15 +++
 .../spine/TransformConstraintData.hx          |  17 +++
 spine-haxe/spine-haxe/spine/Triangulator.hx   |  14 ++
 spine-haxe/spine-haxe/spine/Updatable.hx      |   9 ++
 .../spine/animation/AlphaTimeline.hx          |   1 +
 .../spine-haxe/spine/animation/Animation.hx   |  27 +++-
 .../spine/animation/AnimationStateData.hx     |  11 ++
 .../spine/animation/AttachmentTimeline.hx     |   7 +-
 .../spine/animation/BoneTimeline.hx           |   2 +
 .../spine/animation/CurveTimeline.hx          |  12 +-
 .../spine/animation/CurveTimeline1.hx         |   2 +-
 .../spine/animation/DeformTimeline.hx         |  26 +++-
 .../spine/animation/DrawOrderTimeline.hx      |   7 +-
 .../spine-haxe/spine/animation/EventQueue.hx  |   3 +
 .../spine/animation/EventTimeline.hx          |   8 +-
 .../spine-haxe/spine/animation/EventType.hx   |   3 +
 .../spine/animation/IkConstraintTimeline.hx   |  14 +-
 .../spine/animation/InheritTimeline.hx        |   5 +
 .../spine-haxe/spine/animation/Listeners.hx   |  23 ++++
 .../spine-haxe/spine/animation/MixBlend.hx    |  21 +++
 .../spine/animation/MixDirection.hx           |   4 +
 .../animation/PathConstraintMixTimeline.hx    |   8 +-
 .../PathConstraintPositionTimeline.hx         |   4 +-
 .../PathConstraintSpacingTimeline.hx          |   4 +-
 .../PhysicsConstraintGravityTimeline.hx       |   2 +-
 .../animation/PhysicsConstraintMixTimeline.hx |   2 +-
 .../PhysicsConstraintResetTimeline.hx         |   9 +-
 .../spine-haxe/spine/animation/Property.hx    |   3 +
 .../spine/animation/RGB2Timeline.hx           |  13 +-
 .../spine/animation/RGBA2Timeline.hx          |   7 +-
 .../spine/animation/RGBATimeline.hx           |   9 +-
 .../spine-haxe/spine/animation/RGBTimeline.hx |   5 +-
 .../spine/animation/RotateTimeline.hx         |   1 +
 .../spine/animation/ScaleTimeline.hx          |   1 +
 .../spine/animation/ScaleXTimeline.hx         |   1 +
 .../spine/animation/ScaleYTimeline.hx         |   1 +
 .../spine/animation/SequenceTimeline.hx       |   6 +-
 .../spine/animation/ShearTimeline.hx          |   1 +
 .../spine/animation/ShearXTimeline.hx         |   1 +
 .../spine/animation/ShearYTimeline.hx         |   1 +
 .../spine/animation/SlotTimeline.hx           |   2 +
 .../spine-haxe/spine/animation/Timeline.hx    |  38 ++++++
 .../spine-haxe/spine/animation/TrackEntry.hx  | 127 ++++++++++++++++++
 .../animation/TransformConstraintTimeline.hx  |  10 +-
 .../spine/animation/TranslateTimeline.hx      |   1 +
 .../spine/animation/TranslateXTimeline.hx     |   1 +
 .../spine/animation/TranslateYTimeline.hx     |   1 +
 .../spine-haxe/spine/atlas/TextureLoader.hx   |   8 ++
 .../spine/attachments/Attachment.hx           |   3 +
 .../spine/attachments/AttachmentLoader.hx     |  16 ++-
 .../spine/attachments/AttachmentType.hx       |   3 +
 .../attachments/BoundingBoxAttachment.hx      |   7 +
 .../spine/attachments/ClippingAttachment.hx   |   5 +
 .../spine/attachments/MeshAttachment.hx       |  20 +++
 .../spine/attachments/PathAttachment.hx       |   9 ++
 .../spine/attachments/PointAttachment.hx      |   7 +
 .../spine/attachments/RegionAttachment.hx     |  28 ++++
 .../spine/attachments/VertexAttachment.hx     |  28 +++-
 .../spine-haxe/spine/flixel/SkeletonMesh.hx   |   3 +-
 .../spine-haxe/spine/flixel/SkeletonSprite.hx |   2 +
 .../spine-haxe/spine/starling/SkeletonMesh.hx |   2 +
 .../spine/starling/SkeletonSprite.hx          |   1 +
 92 files changed, 1079 insertions(+), 96 deletions(-)

diff --git a/spine-haxe/spine-haxe/spine/BinaryInput.hx b/spine-haxe/spine-haxe/spine/BinaryInput.hx
index dab9e5552..1af6cec4c 100644
--- a/spine-haxe/spine-haxe/spine/BinaryInput.hx
+++ b/spine-haxe/spine-haxe/spine/BinaryInput.hx
@@ -32,6 +32,9 @@ package spine;
 import haxe.io.FPHelper;
 import haxe.io.Bytes;
 
+/**
+ * Input for reading skeleton data.
+ */
 class BinaryInput {
 	private var bytes:Bytes;
 	private var index:Int = 0;
diff --git a/spine-haxe/spine-haxe/spine/BlendMode.hx b/spine-haxe/spine-haxe/spine/BlendMode.hx
index 9293ae753..d184999dc 100644
--- a/spine-haxe/spine-haxe/spine/BlendMode.hx
+++ b/spine-haxe/spine-haxe/spine/BlendMode.hx
@@ -29,6 +29,7 @@
 
 package spine;
 
+/** Determines how images are blended with existing pixels when drawn. */
 class BlendMode {
 	public static var normal(default, never):BlendMode = new BlendMode(0, "normal");
 	public static var additive(default, never):BlendMode = new BlendMode(1, "additive");
diff --git a/spine-haxe/spine-haxe/spine/Bone.hx b/spine-haxe/spine-haxe/spine/Bone.hx
index b3535bbd1..3494741d5 100644
--- a/spine-haxe/spine-haxe/spine/Bone.hx
+++ b/spine-haxe/spine-haxe/spine/Bone.hx
@@ -29,6 +29,11 @@
 
 package spine;
 
+/** Stores a bone's current pose.
+ * <p>
+ * A bone has a local transform which is used to compute its world transform. A bone also has an applied transform, which is a
+ * local transform that can be applied to compute the world transform. The local transform and applied transform may differ if a
+ * constraint or application code modifies the world transform after it was computed from the local transform. */
 class Bone implements Updatable {
 	static public var yDown:Bool = false;
 
@@ -37,48 +42,73 @@ class Bone implements Updatable {
 	private var _parent:Bone;
 	private var _children:Array<Bone> = new Array<Bone>();
 
+	/** The local x translation. */
 	public var x:Float = 0;
+	/** The local y translation. */
 	public var y:Float = 0;
+	/** The local rotation in degrees, counter clockwise. */
 	public var rotation:Float = 0;
+	/** The local scaleX. */
 	public var scaleX:Float = 0;
+	/** The local scaleY. */
 	public var scaleY:Float = 0;
+	/** The local shearX. */
 	public var shearX:Float = 0;
+	/** The local shearY. */
 	public var shearY:Float = 0;
+	/** The applied local x translation. */
 	public var ax:Float = 0;
+	/** The applied local y translation. */
 	public var ay:Float = 0;
+	/** The applied local rotation in degrees, counter clockwise. */
 	public var arotation:Float = 0;
+	/** The applied local scaleX. */
 	public var ascaleX:Float = 0;
+	/** The applied local scaleY. */
 	public var ascaleY:Float = 0;
+	/** The applied local shearX. */
 	public var ashearX:Float = 0;
+	/** The applied local shearY. */
 	public var ashearY:Float = 0;
+	/** Part of the world transform matrix for the X axis. If changed, {@link #updateAppliedTransform()} should be called. */
 	public var a:Float = 0;
+	/** Part of the world transform matrix for the Y axis. If changed, {@link #updateAppliedTransform()} should be called. */
 	public var b:Float = 0;
+	/** Part of the world transform matrix for the X axis. If changed, {@link #updateAppliedTransform()} should be called. */
 	public var c:Float = 0;
+	/** Part of the world transform matrix for the Y axis. If changed, {@link #updateAppliedTransform()} should be called. */
 	public var d:Float = 0;
+	/** The world X position. If changed, {@link #updateAppliedTransform()} should be called. */
 	public var worldX:Float = 0;
+	/** The world Y position. If changed, {@link #updateAppliedTransform()} should be called. */
 	public var worldY:Float = 0;
+	/** Determines how parent world transforms affect this bone. */
 	public var inherit:Inherit = Inherit.normal;
 	public var sorted:Bool = false;
 	public var active:Bool = false;
 
+	/** The bone's setup pose data. */
 	public var data(get, never):BoneData;
 
 	private function get_data():BoneData {
 		return _data;
 	}
 
+	/** The skeleton this bone belongs to. */
 	public var skeleton(get, never):Skeleton;
 
 	private function get_skeleton():Skeleton {
 		return _skeleton;
 	}
 
+	/** The parent bone, or null if this is the root bone. */
 	public var parent(get, never):Bone;
 
 	private function get_parent():Bone {
 		return _parent;
 	}
 
+	/** The immediate children of this bone. */
 	public var children(get, never):Array<Bone>;
 
 	private function get_children():Array<Bone> {
@@ -101,17 +131,23 @@ class Bone implements Updatable {
 		return active;
 	}
 
-	/** Same as updateWorldTransform(). This method exists for Bone to implement Updatable. */
+	/** Computes the world transform using the parent bone and this bone's local applied transform. */
 	public function update(physics:Physics):Void {
 		updateWorldTransformWith(ax, ay, arotation, ascaleX, ascaleY, ashearX, ashearY);
 	}
 
-	/** Computes the world SRT using the parent bone and this bone's local SRT. */
+	/** Computes the world transform using the parent bone and this bone's local transform.
+	 * <p>
+	 * See {@link #updateWorldTransformWith(float, float, float, float, float, float, float)}. */
 	public function updateWorldTransform():Void {
 		updateWorldTransformWith(x, y, rotation, scaleX, scaleY, shearX, shearY);
 	}
 
-	/** Computes the world SRT using the parent bone and the specified local SRT. */
+	/** Computes the world transform using the parent bone and the specified local transform. The applied transform is set to the
+	 * specified local transform. Child bones are not updated.
+	 * <p>
+	 * See <a href="https://esotericsoftware.com/spine-runtime-skeletons#World-transforms">World transforms</a> in the Spine
+	 * Runtimes Guide. */
 	public function updateWorldTransformWith(x:Float, y:Float, rotation:Float, scaleX:Float, scaleY:Float, shearX:Float, shearY:Float):Void {
 		ax = x;
 		ay = y;
@@ -234,6 +270,7 @@ class Bone implements Updatable {
 		d *= sy;
 	}
 
+	/** Sets this bone's local transform to the setup pose. */
 	public function setToSetupPose():Void {
 		x = data.x;
 		y = data.y;
@@ -245,10 +282,14 @@ class Bone implements Updatable {
 		inherit = data.inherit;
 	}
 
-	/** Computes the individual applied transform values from the world transform. This can be useful to perform processing using
-	 * the applied transform after the world transform has been modified directly (eg, by a constraint).
+	/** Computes the applied transform values from the world transform.
 	 * <p>
-	 * Some information is ambiguous in the world transform, such as -1,-1 scale versus 180 rotation. */
+	 * If the world transform is modified (by a constraint, {@link #rotateWorld(float)}, etc) then this method should be called so
+	 * the applied transform matches the world transform. The applied transform may be needed by other code (eg to apply another
+	 * constraint).
+	 * <p>
+	 * Some information is ambiguous in the world transform, such as -1,-1 scale versus 180 rotation. The applied transform after
+	 * calling this method is equivalent to the local transform used to compute the world transform, but may not be identical. */
 	public function updateAppliedTransform():Void {
 		var parent:Bone = parent;
 		if (parent == null) {
@@ -329,42 +370,58 @@ class Bone implements Updatable {
 		}
 	}
 
+	/** The world rotation for the X axis, calculated using {@link #a} and {@link #c}. */
 	public var worldRotationX(get, never):Float;
 
 	private function get_worldRotationX():Float {
 		return Math.atan2(c, a) * MathUtils.radDeg;
 	}
 
+	/** The world rotation for the Y axis, calculated using {@link #b} and {@link #d}. */
 	public var worldRotationY(get, never):Float;
 
 	private function get_worldRotationY():Float {
 		return Math.atan2(d, b) * MathUtils.radDeg;
 	}
 
+	/** The magnitude (always positive) of the world scale X, calculated using {@link #a} and {@link #c}. */
 	public var worldScaleX(get, never):Float;
 
 	private function get_worldScaleX():Float {
 		return Math.sqrt(a * a + c * c);
 	}
 
+	/** The magnitude (always positive) of the world scale Y, calculated using {@link #b} and {@link #d}. */
 	public var worldScaleY(get, never):Float;
 
 	private function get_worldScaleY():Float {
 		return Math.sqrt(b * b + d * d);
 	}
 
+	/** Transforms a point from world coordinates to the parent bone's local coordinates.
+	 * @param world The world coordinates to transform.
+	 * @return The transformed coordinates in the parent's local space.
+	 */
 	private function worldToParent(world: Array<Float>):Array<Float> {
 		if (world == null)
 			throw new SpineException("world cannot be null.");
 		return parent == null ? world : parent.worldToLocal(world);
 	}
 
+	/** Transforms a point from the parent bone's coordinates to world coordinates.
+	 * @param world The parent coordinates to transform.
+	 * @return The transformed coordinates in world space.
+	 */
 	private function parentToWorld(world: Array<Float>):Array<Float> {
 		if (world == null)
 			throw new SpineException("world cannot be null.");
 		return parent == null ? world : parent.localToWorld(world);
 	}
 
+	/** Transforms a point from world coordinates to the bone's local coordinates.
+	 * @param world The world coordinates to transform.
+	 * @return The transformed coordinates in local space.
+	 */
 	public function worldToLocal(world:Array<Float>):Array<Float> {
 		var a:Float = a, b:Float = b, c:Float = c, d:Float = d;
 		var invDet:Float = 1 / (a * d - b * c);
@@ -374,6 +431,10 @@ class Bone implements Updatable {
 		return world;
 	}
 
+	/** Transforms a point from the bone's local coordinates to world coordinates.
+	 * @param local The local coordinates to transform.
+	 * @return The transformed coordinates in world space.
+	 */
 	public function localToWorld(local:Array<Float>):Array<Float> {
 		var localX:Float = local[0], localY:Float = local[1];
 		local[0] = localX * a + localY * b + worldX;
@@ -381,12 +442,20 @@ class Bone implements Updatable {
 		return local;
 	}
 
+	/** Transforms a world rotation to a local rotation.
+	 * @param worldRotation The world rotation in degrees.
+	 * @return The rotation in local space in degrees.
+	 */
 	public function worldToLocalRotation(worldRotation:Float):Float {
 		var sin:Float = MathUtils.sinDeg(worldRotation),
 			cos:Float = MathUtils.cosDeg(worldRotation);
 		return Math.atan2(a * sin - c * cos, d * cos - b * sin) * MathUtils.radDeg + rotation - shearX;
 	}
 
+	/** Transforms a local rotation to a world rotation.
+	 * @param localRotation The local rotation in degrees.
+	 * @return The rotation in world space in degrees.
+	 */
 	public function localToWorldRotation(localRotation:Float):Float {
 		localRotation -= rotation - shearX;
 		var sin:Float = MathUtils.sinDeg(localRotation),
@@ -394,6 +463,12 @@ class Bone implements Updatable {
 		return Math.atan2(cos * c + sin * d, cos * a + sin * b) * MathUtils.radDeg;
 	}
 
+	/** Rotates the world transform the specified amount.
+	 * <p>
+	 * After changes are made to the world transform, {@link #updateAppliedTransform()} should be called and
+	 * {@link #update(Physics)} will need to be called on any child bones, recursively.
+	 * @param degrees The rotation in degrees.
+	 */
 	public function rotateWorld(degrees:Float):Void {
 		degrees *= MathUtils.degRad;
 		var sin:Float = Math.sin(degrees), cos:Float = Math.cos(degrees);
diff --git a/spine-haxe/spine-haxe/spine/BoneData.hx b/spine-haxe/spine-haxe/spine/BoneData.hx
index 29bb48beb..698f42914 100644
--- a/spine-haxe/spine-haxe/spine/BoneData.hx
+++ b/spine-haxe/spine-haxe/spine/BoneData.hx
@@ -29,23 +29,41 @@
 
 package spine;
 
+/** Stores the setup pose for a {@link Bone}. */
 class BoneData {
 	private var _index:Int;
 	private var _name:String;
 	private var _parent:BoneData;
 
+	/** The bone's length. */
 	public var length:Float = 0;
+	/** The local x translation. */
 	public var x:Float = 0;
+	/** The local y translation. */
 	public var y:Float = 0;
+	/** The local rotation in degrees, counter clockwise. */
 	public var rotation:Float = 0;
+	/** The local scaleX. */
 	public var scaleX:Float = 1;
+	/** The local scaleY. */
 	public var scaleY:Float = 1;
+	/** The local shearX. */
 	public var shearX:Float = 0;
+	/** The local shearY. */
 	public var shearY:Float = 0;
+	/** Determines how parent world transforms affect this bone. */
 	public var inherit:Inherit = Inherit.normal;
+	/** When true, {@link Skeleton#updateWorldTransform()} only updates this bone if the {@link Skeleton#getSkin()} contains
+	 * this bone.
+	 * 
+	 * See {@link Skin#getBones()}. */
 	public var skinRequired:Bool = false;
+	/** The color of the bone as it was in Spine, or a default color if nonessential data was not exported. Bones are not usually
+	 * rendered at runtime. */
 	public var color:Color = new Color(0, 0, 0, 0);
+	/** The bone icon as it was in Spine, or null if nonessential data was not exported. */
 	public var icon:String;
+	/** False if the bone was hidden in Spine and nonessential data was exported. Does not affect runtime rendering. */
 	public var visible:Bool = false;
 
 	/** @param parent May be null. */
@@ -59,12 +77,14 @@ class BoneData {
 		_parent = parent;
 	}
 
+	/** The index of the bone in {@link Skeleton#getBones()}. */
 	public var index(get, never):Int;
 
 	private function get_index():Int {
 		return _index;
 	}
 
+	/** The name of the bone, which is unique across all bones in the skeleton. */
 	public var name(get, never):String;
 
 	function get_name():String {
diff --git a/spine-haxe/spine-haxe/spine/Color.hx b/spine-haxe/spine-haxe/spine/Color.hx
index e9cb7ee01..a228f9bc6 100644
--- a/spine-haxe/spine-haxe/spine/Color.hx
+++ b/spine-haxe/spine-haxe/spine/Color.hx
@@ -29,6 +29,7 @@
 
 package spine;
 
+/** A color class, storing the r, g, b and alpha components as floats in the range [0,1]. */
 class Color {
 	public static var WHITE:Color = new Color(1, 1, 1, 1);
 	public static var RED:Color = new Color(1, 0, 0, 1);
diff --git a/spine-haxe/spine-haxe/spine/ConstraintData.hx b/spine-haxe/spine-haxe/spine/ConstraintData.hx
index 6bdde8587..1a1c6244b 100644
--- a/spine-haxe/spine-haxe/spine/ConstraintData.hx
+++ b/spine-haxe/spine-haxe/spine/ConstraintData.hx
@@ -29,9 +29,17 @@
 
 package spine;
 
+/** The base class for all constraint datas. */
 class ConstraintData {
+	/** The constraint's name, which is unique across all constraints in the skeleton of the same type. */
 	public var name:String;
+	/** The ordinal of this constraint for the order a skeleton's constraints will be applied by
+	 * Skeleton#updateWorldTransform(). */
 	public var order:Int = 0;
+	/** When true, Skeleton#updateWorldTransform() only updates this constraint if the Skeleton#getSkin()
+	 * contains this constraint.
+	 * 
+	 * See Skin#getConstraints(). */
 	public var skinRequired:Bool = false;
 
 	function new(name:String, order:Int, skinRequired:Bool) {
diff --git a/spine-haxe/spine-haxe/spine/Event.hx b/spine-haxe/spine-haxe/spine/Event.hx
index ef7856c8f..f100895bd 100644
--- a/spine-haxe/spine-haxe/spine/Event.hx
+++ b/spine-haxe/spine-haxe/spine/Event.hx
@@ -29,9 +29,16 @@
 
 package spine;
 
+/** Stores the current pose values for an {@link Event}.
+ * <p>
+ * See Timeline
+ * {@link Timeline#apply(Skeleton, float, float, com.badlogic.gdx.utils.Array, float, com.esotericsoftware.spine.Animation.MixBlend, com.esotericsoftware.spine.Animation.MixDirection)},
+ * AnimationStateListener {@link AnimationStateListener#event(com.esotericsoftware.spine.AnimationState.TrackEntry, Event)}, and
+ * <a href="https://esotericsoftware.com/spine-events">Events</a> in the Spine User Guide. */
 class Event {
 	private var _data:EventData;
 
+	/** The animation time this event was keyed. */
 	public var time:Float = 0;
 	public var intValue:Int = 0;
 	public var floatValue:Float = 0;
@@ -46,6 +53,7 @@ class Event {
 		_data = data;
 	}
 
+	/** The event's setup pose data. */
 	public var data(get, never):EventData;
 
 	private function get_data():EventData {
diff --git a/spine-haxe/spine-haxe/spine/EventData.hx b/spine-haxe/spine-haxe/spine/EventData.hx
index 75f003db0..34c6c28ca 100644
--- a/spine-haxe/spine-haxe/spine/EventData.hx
+++ b/spine-haxe/spine-haxe/spine/EventData.hx
@@ -29,6 +29,9 @@
 
 package spine;
 
+/** Stores the setup pose values for an {@link Event}.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-events">Events</a> in the Spine User Guide. */
 class EventData {
 	private var _name:String;
 
@@ -45,6 +48,7 @@ class EventData {
 		_name = name;
 	}
 
+	/** The name of the event, which is unique across all events in the skeleton. */
 	public var name(get, never):String;
 
 	private function get_name():String {
diff --git a/spine-haxe/spine-haxe/spine/HasTextureRegion.hx b/spine-haxe/spine-haxe/spine/HasTextureRegion.hx
index be37e57c0..a34a79481 100644
--- a/spine-haxe/spine-haxe/spine/HasTextureRegion.hx
+++ b/spine-haxe/spine-haxe/spine/HasTextureRegion.hx
@@ -30,9 +30,15 @@
 package spine;
 
 interface HasTextureRegion {
+	/** The name used to find the {@link #region}. */
 	public var path:String;
+	/** Sets the region used to draw the attachment. After setting the region or if the region's properties are changed,
+	 * {@link #updateRegion()} must be called. */
 	public var region:TextureRegion;
+	/** The color to tint the attachment. */
 	public var color:Color;
 	public var sequence:Sequence;
+	/** Updates any values the attachment calculates using the {@link #region}. Must be called after setting the
+	 * {@link #region} or if the region's properties are changed. */
 	public function updateRegion():Void;
 }
diff --git a/spine-haxe/spine-haxe/spine/IkConstraint.hx b/spine-haxe/spine-haxe/spine/IkConstraint.hx
index 64f1373d8..c62015545 100644
--- a/spine-haxe/spine-haxe/spine/IkConstraint.hx
+++ b/spine-haxe/spine-haxe/spine/IkConstraint.hx
@@ -29,15 +29,32 @@
 
 package spine;
 
+/** Stores the current pose for an IK constraint. An IK constraint adjusts the rotation of 1 or 2 constrained bones so the tip of
+ * the last bone is as close to the target bone as possible.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-ik-constraints">IK constraints</a> in the Spine User Guide. */
 class IkConstraint implements Updatable {
 	private var _data:IkConstraintData;
 
+	/** The bones that will be modified by this IK constraint. */
 	public var bones:Array<Bone>;
+	/** The bone that is the IK target. */
 	public var target:Bone;
+	/** For two bone IK, controls the bend direction of the IK bones, either 1 or -1. */
 	public var bendDirection:Int = 0;
+	/** For one bone IK, when true and the target is too close, the bone is scaled to reach it. */
 	public var compress:Bool = false;
+	/** When true and the target is out of range, the parent bone is scaled to reach it.
+	 * <p>
+	 * For two bone IK: 1) the child bone's local Y translation is set to 0, 2) stretch is not applied if {@link #getSoftness()} is
+	 * > 0, and 3) if the parent bone has local nonuniform scale, stretch is not applied. */
 	public var stretch:Bool = false;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained rotation.
+	 * <p>
+	 * For two bone IK: if the parent bone has local nonuniform scale, the child bone's local Y translation is set to 0. */
 	public var mix:Float = 0;
+	/** For two bone IK, the target bone's distance from the maximum reach of the bones where rotation begins to slow. The bones
+	 * will not straighten completely until the target is this far out of range. */
 	public var softness:Float = 0;
 	public var active:Bool = false;
 
@@ -74,6 +91,7 @@ class IkConstraint implements Updatable {
 		stretch = data.stretch;
 	}
 
+	/** Applies the constraint to the constrained bones. */
 	public function update(physics:Physics):Void {
 		if (mix == 0)
 			return;
@@ -85,6 +103,7 @@ class IkConstraint implements Updatable {
 		}
 	}
 
+	/** The IK constraint's setup pose data. */
 	public var data(get, never):IkConstraintData;
 
 	private function get_data():IkConstraintData {
@@ -95,8 +114,7 @@ class IkConstraint implements Updatable {
 		return _data.name != null ? _data.name : "IkContstraint?";
 	}
 
-	/** Adjusts the bone rotation so the tip is as close to the target position as possible. The target is specified in the world
-	 * coordinate system. */
+	/** Applies 1 bone IK. The target is specified in the world coordinate system. */
 	static public function apply1(bone:Bone, targetX:Float, targetY:Float, compress:Bool, stretch:Bool, uniform:Bool, alpha:Float):Void {
 		var p:Bone = bone.parent;
 		var pa:Float = p.a, pb:Float = p.b, pc:Float = p.c, pd:Float = p.d;
@@ -164,9 +182,8 @@ class IkConstraint implements Updatable {
 		bone.updateWorldTransformWith(bone.ax, bone.ay, bone.arotation + rotationIK * alpha, sx, sy, bone.ashearX, bone.ashearY);
 	}
 
-	/** Adjusts the parent and child bone rotations so the tip of the child is as close to the target position as possible. The
-	 * target is specified in the world coordinate system.
-	 * @param child Any descendant bone of the parent. */
+	/** Applies 2 bone IK. The target is specified in the world coordinate system.
+	 * @param child A direct descendant of the parent bone. */
 	static public function apply2(parent:Bone, child:Bone, targetX:Float, targetY:Float, bendDir:Int, stretch:Bool, uniform:Bool, softness:Float,
 			alpha:Float):Void {
 		if (parent.inherit != Inherit.normal || child.inherit != Inherit.normal) return;
diff --git a/spine-haxe/spine-haxe/spine/IkConstraintData.hx b/spine-haxe/spine-haxe/spine/IkConstraintData.hx
index 9c05d84fb..a26aae5cd 100644
--- a/spine-haxe/spine-haxe/spine/IkConstraintData.hx
+++ b/spine-haxe/spine-haxe/spine/IkConstraintData.hx
@@ -29,14 +29,31 @@
 
 package spine;
 
+/** Stores the setup pose for an {@link IkConstraint}.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-ik-constraints">IK constraints</a> in the Spine User Guide. */
 class IkConstraintData extends ConstraintData {
+	/** The bones that are constrained by this IK constraint. */
 	public var bones:Array<BoneData> = new Array<BoneData>();
+	/** The bone that is the IK target. */
 	public var target:BoneData;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained rotation.
+	 * 
+	 * For two bone IK: if the parent bone has local nonuniform scale, the child bone's local Y translation is set to 0. */
 	public var mix:Float = 0;
+	/** For two bone IK, controls the bend direction of the IK bones, either 1 or -1. */
 	public var bendDirection:Int = 0;
+	/** For one bone IK, when true and the target is too close, the bone is scaled to reach it. */
 	public var compress:Bool = false;
+	/** When true and the target is out of range, the parent bone is scaled to reach it.
+	 * 
+	 * For two bone IK: 1) the child bone's local Y translation is set to 0, 2) stretch is not applied if {@link #getSoftness()} is
+	 * > 0, and 3) if the parent bone has local nonuniform scale, stretch is not applied. */
 	public var stretch:Bool = false;
+	/** When true and {@link #getCompress()} or {@link #getStretch()} is used, the bone is scaled on both the X and Y axes. */
 	public var uniform:Bool = false;
+	/** For two bone IK, the target bone's distance from the maximum reach of the bones where rotation begins to slow. The bones
+	 * will not straighten completely until the target is this far out of range. */
 	public var softness:Float = 0;
 
 	public function new(name:String) {
diff --git a/spine-haxe/spine-haxe/spine/Inherit.hx b/spine-haxe/spine-haxe/spine/Inherit.hx
index 426af9c82..3823e418d 100644
--- a/spine-haxe/spine-haxe/spine/Inherit.hx
+++ b/spine-haxe/spine-haxe/spine/Inherit.hx
@@ -29,6 +29,7 @@
 
 package spine;
 
+/** Determines how a bone inherits world transforms from parent bones. */
 class Inherit {
 	public static var normal(default, never):Inherit = new Inherit(0, "normal");
 	public static var onlyTranslation(default, never):Inherit = new Inherit(1, "onlyTranslation");
diff --git a/spine-haxe/spine-haxe/spine/MathUtils.hx b/spine-haxe/spine-haxe/spine/MathUtils.hx
index 003c871f7..bf9cd4989 100644
--- a/spine-haxe/spine-haxe/spine/MathUtils.hx
+++ b/spine-haxe/spine-haxe/spine/MathUtils.hx
@@ -29,6 +29,9 @@
 
 package spine;
 
+/**
+ * Various math utility functions.
+ */
 class MathUtils {
 	static public var PI:Float = Math.PI;
 	static public var PI2:Float = Math.PI * 2;
@@ -36,18 +39,41 @@ class MathUtils {
 	static public var radDeg:Float = 180 / Math.PI;
 	static public var degRad:Float = Math.PI / 180;
 
+	/**
+	 * Returns the cosine in degrees.
+	 * @param degrees The angle in degrees.
+	 * @return The cosine.
+	 */
 	static public function cosDeg(degrees:Float):Float {
 		return Math.cos(degrees * degRad);
 	}
 
+	/**
+	 * Returns the sine in degrees.
+	 * @param degrees The angle in degrees.
+	 * @return The sine.
+	 */
 	static public function sinDeg(degrees:Float):Float {
 		return Math.sin(degrees * degRad);
 	}
 
+	/**
+	 * Returns the arc tangent in degrees.
+	 * @param y The y-coordinate.
+	 * @param x The x-coordinate.
+	 * @return The arc tangent in degrees.
+	 */
 	static public function atan2Deg (y:Float, x:Float):Float {
-		return Math.atan2(y, x) * MathUtils.degRad;
+		return Math.atan2(y, x) * MathUtils.radDeg;
 	}
 
+	/**
+	 * Clamps a value between a minimum and maximum value.
+	 * @param value The value to clamp.
+	 * @param min The minimum value.
+	 * @param max The maximum value.
+	 * @return The clamped value.
+	 */
 	static public function clamp(value:Float, min:Float, max:Float):Float {
 		if (value < min)
 			return min;
@@ -56,14 +82,32 @@ class MathUtils {
 		return value;
 	}
 
+	/**
+	 * Returns the signum function of the value.
+	 * @param value The value.
+	 * @return -1 if the value is negative, 1 if the value is positive, 0 if the value is zero.
+	 */
 	static public function signum(value:Float):Float {
 		return value > 0 ? 1 : value < 0 ? -1 : 0;
 	}
 
+	/**
+	 * Returns a random number between the specified minimum and maximum values using a triangular distribution.
+	 * @param min The minimum value.
+	 * @param max The maximum value.
+	 * @return A random number using a triangular distribution.
+	 */
 	static public function randomTriangular(min:Float, max:Float):Float {
 		return randomTriangularWith(min, max, (min + max) * 0.5);
 	}
 
+	/**
+	 * Returns a random number between the specified minimum and maximum values using a triangular distribution.
+	 * @param min The minimum value.
+	 * @param max The maximum value.
+	 * @param mode The mode of the triangular distribution.
+	 * @return A random number using a triangular distribution.
+	 */
 	static public function randomTriangularWith(min:Float, max:Float, mode:Float):Float {
 		var u:Float = Math.random();
 		var d:Float = max - min;
diff --git a/spine-haxe/spine-haxe/spine/PathConstraint.hx b/spine-haxe/spine-haxe/spine/PathConstraint.hx
index 5a7ee8575..523ead993 100644
--- a/spine-haxe/spine-haxe/spine/PathConstraint.hx
+++ b/spine-haxe/spine-haxe/spine/PathConstraint.hx
@@ -31,6 +31,10 @@ package spine;
 
 import spine.attachments.PathAttachment;
 
+/** Stores the current pose for a path constraint. A path constraint adjusts the rotation, translation, and scale of the
+ * constrained bones so they follow a {@link PathAttachment}.
+ *
+ * See <a href="https://esotericsoftware.com/spine-path-constraints">Path constraints</a> in the Spine User Guide. */
 class PathConstraint implements Updatable {
 	private static inline var NONE:Int = -1;
 	private static inline var BEFORE:Int = -2;
@@ -40,11 +44,17 @@ class PathConstraint implements Updatable {
 	private var _data:PathConstraintData;
 	private var _bones:Array<Bone>;
 
+	/** The slot whose path attachment will be used to constrained the bones. */
 	public var target:Slot;
+	/** The position along the path. */
 	public var position:Float = 0;
+	/** The spacing between bones. */
 	public var spacing:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained rotation. */
 	public var mixRotate:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained translation X. */
 	public var mixX:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained translation Y. */
 	public var mixY:Float = 0;
 
 	private var _spaces(default, never):Array<Float> = new Array<Float>();
@@ -89,6 +99,7 @@ class PathConstraint implements Updatable {
 		mixY = data.mixY;
 	}
 
+	/** Applies the constraint to the constrained bones. */
 	public function update(physics:Physics):Void {
 		var attachment:PathAttachment = cast(target.attachment, PathAttachment);
 		if (attachment == null)
@@ -585,12 +596,14 @@ class PathConstraint implements Updatable {
 		}
 	}
 
+	/** The bones that will be modified by this path constraint. */
 	public var bones(get, never):Array<Bone>;
 
 	private function get_bones():Array<Bone> {
 		return _bones;
 	}
 
+	/** The path constraint's setup pose data. */
 	public var data(get, never):PathConstraintData;
 
 	private function get_data():PathConstraintData {
diff --git a/spine-haxe/spine-haxe/spine/PathConstraintData.hx b/spine-haxe/spine-haxe/spine/PathConstraintData.hx
index 95e800f38..d9be73750 100644
--- a/spine-haxe/spine-haxe/spine/PathConstraintData.hx
+++ b/spine-haxe/spine-haxe/spine/PathConstraintData.hx
@@ -29,24 +29,39 @@
 
 package spine;
 
+/** Stores the setup pose for a {@link PathConstraint}.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-path-constraints">Path constraints</a> in the Spine User Guide. */
 class PathConstraintData extends ConstraintData {
+	/** The bones that will be modified by this path constraint. */
 	private var _bones:Array<BoneData> = new Array<BoneData>();
 
+	/** The slot whose path attachment will be used to constrained the bones. */
 	public var target:SlotData;
+	/** The mode for positioning the first bone on the path. */
 	public var positionMode:PositionMode = PositionMode.fixed;
+	/** The mode for positioning the bones after the first bone on the path. */
 	public var spacingMode:SpacingMode = SpacingMode.fixed;
+	/** The mode for adjusting the rotation of the bones. */
 	public var rotateMode:RotateMode = RotateMode.chain;
+	/** An offset added to the constrained bone rotation. */
 	public var offsetRotation:Float = 0;
+	/** The position along the path. */
 	public var position:Float = 0;
+	/** The spacing between bones. */
 	public var spacing:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained rotation. */
 	public var mixRotate:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained translation X. */
 	public var mixX:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained translation Y. */
 	public var mixY:Float = 0;
 
 	public function new(name:String) {
 		super(name, 0, false);
 	}
 
+	/** The bones that will be modified by this path constraint. */
 	public var bones(get, never):Array<BoneData>;
 
 	private function get_bones():Array<BoneData> {
diff --git a/spine-haxe/spine-haxe/spine/Physics.hx b/spine-haxe/spine-haxe/spine/Physics.hx
index 8fe575627..0afda38d2 100644
--- a/spine-haxe/spine-haxe/spine/Physics.hx
+++ b/spine-haxe/spine-haxe/spine/Physics.hx
@@ -29,10 +29,15 @@
 
 package spine;
 
+/** Determines how physics and other non-deterministic updates are applied. */
 class Physics {
+	/** Physics are not updated or applied. */
 	public static var none(default, never):Physics = new Physics("none");
+	/** Physics are reset to the current pose. */
 	public static var reset(default, never):Physics = new Physics("reset");
+	/** Physics are updated and the pose from physics is applied. */
 	public static var update(default, never):Physics = new Physics("update");
+	/** Physics are not updated but the pose from physics is applied. */
 	public static var pose(default, never):Physics = new Physics("pose");
 
 	public static var values:Array<Physics> = [none, reset, update, pose];
diff --git a/spine-haxe/spine-haxe/spine/PhysicsConstraint.hx b/spine-haxe/spine-haxe/spine/PhysicsConstraint.hx
index 125ec44ae..4935e2a4d 100644
--- a/spine-haxe/spine-haxe/spine/PhysicsConstraint.hx
+++ b/spine-haxe/spine-haxe/spine/PhysicsConstraint.hx
@@ -29,6 +29,9 @@
 
 package spine;
 
+/** Stores the current pose for a physics constraint. A physics constraint applies physics to bones.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-physics-constraints">Physics constraints</a> in the Spine User Guide. */
 class PhysicsConstraint implements Updatable {
 	private var _data:PhysicsConstraintData;
 	private var _bone:Bone = null;
@@ -108,6 +111,7 @@ class PhysicsConstraint implements Updatable {
 		return active;
 	}
 
+	/** Applies the constraint to the constrained bones. */
 	public function update(physics:Physics):Void {
 		var mix:Float = this.mix;
 		if (mix == 0) return;
@@ -291,6 +295,8 @@ class PhysicsConstraint implements Updatable {
 		bone.updateAppliedTransform();
 	}
 
+	/** Translates the physics constraint so next update(Physics) forces are applied as if the bone moved an additional
+	 * amount in world space. */
 	public function translate (x:Float, y:Float):Void {
 		ux -= x;
 		uy -= y;
@@ -298,12 +304,15 @@ class PhysicsConstraint implements Updatable {
 		cy -= y;
 	}
 
+	/** Rotates the physics constraint so next update(Physics) forces are applied as if the bone rotated around the
+	 * specified point in world space. */
 	public function rotate (x:Float, y:Float, degrees:Float):Void {
 		var r:Float = degrees * MathUtils.degRad, cos:Float = Math.cos(r), sin:Float = Math.sin(r);
 		var dx:Float = cx - x, dy:Float = cy - y;
 		translate(dx * cos - dy * sin - dx, dx * sin + dy * cos - dy);
 	}
 
+	/** The bone constrained by this physics constraint. */
 	public var bone(get, never):Bone;
 
 	private function get_bone():Bone {
@@ -312,6 +321,7 @@ class PhysicsConstraint implements Updatable {
 		else return _bone;
 	}
 
+	/** The physics constraint's setup pose data. */
 	public var data(get, never):PhysicsConstraintData;
 
 	private function get_data():PhysicsConstraintData {
diff --git a/spine-haxe/spine-haxe/spine/PhysicsConstraintData.hx b/spine-haxe/spine-haxe/spine/PhysicsConstraintData.hx
index 665e692f3..e646203bd 100644
--- a/spine-haxe/spine-haxe/spine/PhysicsConstraintData.hx
+++ b/spine-haxe/spine-haxe/spine/PhysicsConstraintData.hx
@@ -29,7 +29,11 @@
 
 package spine;
 
+/** Stores the setup pose for a {@link PhysicsConstraint}.
+ * 
+ * See <a href="https://esotericsoftware.com/spine-physics-constraints">Physics constraints</a> in the Spine User Guide. */
 class PhysicsConstraintData extends ConstraintData {
+	/** The bone constrained by this physics constraint. */
 	public var bone:BoneData;
 	public var x:Float = 0;
 	public var y:Float = 0;
@@ -44,6 +48,7 @@ class PhysicsConstraintData extends ConstraintData {
 	public var massInverse:Float = 0;
 	public var wind:Float = 0;
 	public var gravity:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained poses. */
 	public var mix:Float = 0;
 	public var inertiaGlobal:Bool = false;
 	public var strengthGlobal:Bool = false;
diff --git a/spine-haxe/spine-haxe/spine/Poolable.hx b/spine-haxe/spine-haxe/spine/Poolable.hx
index 8f6524ce5..1cd4dd791 100644
--- a/spine-haxe/spine-haxe/spine/Poolable.hx
+++ b/spine-haxe/spine-haxe/spine/Poolable.hx
@@ -29,6 +29,12 @@
 
 package spine;
 
+/**
+ * Objects implementing this interface can be reset to prepare them for reuse by an object pool.
+ */
 interface Poolable {
+	/**
+	 * Resets this object to prepare it for reuse by an object pool.
+	 */
 	function reset():Void;
 }
diff --git a/spine-haxe/spine-haxe/spine/PositionMode.hx b/spine-haxe/spine-haxe/spine/PositionMode.hx
index 9fd0cef97..4c08d68a3 100644
--- a/spine-haxe/spine-haxe/spine/PositionMode.hx
+++ b/spine-haxe/spine-haxe/spine/PositionMode.hx
@@ -29,6 +29,10 @@
 
 package spine;
 
+/** Controls how the first bone is positioned along the path.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-path-constraints#Position-mode">Position mode</a> in the Spine User
+ * Guide. */
 class PositionMode {
 	public static var fixed(default, never):PositionMode = new PositionMode("fixed");
 	public static var percent(default, never):PositionMode = new PositionMode("percent");
diff --git a/spine-haxe/spine-haxe/spine/RotateMode.hx b/spine-haxe/spine-haxe/spine/RotateMode.hx
index 758a94635..93ce13798 100644
--- a/spine-haxe/spine-haxe/spine/RotateMode.hx
+++ b/spine-haxe/spine-haxe/spine/RotateMode.hx
@@ -29,9 +29,14 @@
 
 package spine;
 
+/** Controls how bones are rotated, translated, and scaled to match the path.
+ * 
+ * See <a href="https://esotericsoftware.com/spine-path-constraints#Rotate-mode">Rotate mode</a> in the Spine User Guide. */
 class RotateMode {
 	public static var tangent(default, never):RotateMode = new RotateMode("tangent");
 	public static var chain(default, never):RotateMode = new RotateMode("chain");
+	/** When chain scale, constrained bones should all have the same parent. That way when the path constraint scales a bone, it
+	 * doesn't affect other constrained bones. */
 	public static var chainScale(default, never):RotateMode = new RotateMode("chainScale");
 
 	public static var values(default, never):Array<RotateMode> = [tangent, chain, chainScale];
diff --git a/spine-haxe/spine-haxe/spine/Sequence.hx b/spine-haxe/spine-haxe/spine/Sequence.hx
index 40b28a1f1..2b9888ea7 100644
--- a/spine-haxe/spine-haxe/spine/Sequence.hx
+++ b/spine-haxe/spine-haxe/spine/Sequence.hx
@@ -29,9 +29,11 @@
 
 package spine;
 
+/** A sequence for an attachment with multiple texture regions, which can be used for animation. */
 class Sequence {
 	private static var _nextID = 0;
 
+	/** Returns a unique ID for this attachment. */
 	public var id = _nextID++;
 	public var regions:Array<TextureRegion>;
 	public var start = 0;
@@ -45,6 +47,7 @@ class Sequence {
 		this.regions.resize(count);
 	}
 
+	/** Copy constructor. */
 	public function copy():Sequence {
 		var copy = new Sequence(this.regions.length);
 		for (i in 0...this.regions.length) {
diff --git a/spine-haxe/spine-haxe/spine/SequenceMode.hx b/spine-haxe/spine-haxe/spine/SequenceMode.hx
index f20c22b41..5e7fcff5d 100644
--- a/spine-haxe/spine-haxe/spine/SequenceMode.hx
+++ b/spine-haxe/spine-haxe/spine/SequenceMode.hx
@@ -29,6 +29,9 @@
 
 package spine;
 
+/**
+ * Defines how a {@link Sequence} is played.
+ */
 class SequenceMode {
 	public static var hold(default, never):SequenceMode = new SequenceMode("hold", 0);
 	public static var once(default, never):SequenceMode = new SequenceMode("once", 1);
diff --git a/spine-haxe/spine-haxe/spine/Skeleton.hx b/spine-haxe/spine-haxe/spine/Skeleton.hx
index 9abeb79ae..c3f70b9cd 100644
--- a/spine-haxe/spine-haxe/spine/Skeleton.hx
+++ b/spine-haxe/spine-haxe/spine/Skeleton.hx
@@ -37,33 +37,61 @@ import spine.attachments.MeshAttachment;
 import spine.attachments.PathAttachment;
 import spine.attachments.RegionAttachment;
 
+/** Stores the current pose for a skeleton.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-runtime-architecture#Instance-objects">Instance objects</a> in the Spine
+ * Runtimes Guide. */
 class Skeleton {
 	private static var quadTriangles:Array<Int> = [0, 1, 2, 2, 3, 0];
 	private var _data:SkeletonData;
 
+	/** The skeleton's bones, sorted parent first. The root bone is always the first bone. */
 	public var bones:Array<Bone>;
+	/** The skeleton's slots. */
 	public var slots:Array<Slot>; // Setup pose draw order.
+	/** The skeleton's slots in the order they should be drawn. The returned array may be modified to change the draw order. */
 	public var drawOrder:Array<Slot>;
+	/** The skeleton's IK constraints. */
 	public var ikConstraints:Array<IkConstraint>;
+	/** The skeleton's transform constraints. */
 	public var transformConstraints:Array<TransformConstraint>;
+	/** The skeleton's path constraints. */
 	public var pathConstraints:Array<PathConstraint>;
+	/** The skeleton's physics constraints. */
 	public var physicsConstraints:Array<PhysicsConstraint>;
 
 	private var _updateCache:Array<Updatable> = new Array<Updatable>();
 	private var _skin:Skin;
 
+	/** The color to tint all the skeleton's attachments. */
 	public var color:Color = new Color(1, 1, 1, 1);
+	/** Scales the entire skeleton on the X axis.
+	 * <p>
+	 * Bones that do not inherit scale are still affected by this property. */
 	public var scaleX:Float = 1;
 
+	/** Scales the entire skeleton on the Y axis.
+	 * <p>
+	 * Bones that do not inherit scale are still affected by this property. */
 	public var scaleY(get, default):Float = 1;
 	function get_scaleY() {
 		return Bone.yDown ? -scaleY : scaleY;
 	}
 
+	/** Sets the skeleton X position, which is added to the root bone worldX position.
+	 * <p>
+	 * Bones that do not inherit translation are still affected by this property. */
 	public var x:Float = 0;
+	/** Sets the skeleton Y position, which is added to the root bone worldY position.
+	 * <p>
+	 * Bones that do not inherit translation are still affected by this property. */
 	public var y:Float = 0;
+	/** Returns the skeleton's time. This is used for time-based manipulations, such as {@link PhysicsConstraint}.
+	 * <p>
+	 * See {@link #update(float)}. */
 	public var time:Float = 0;
 
+	/** Creates a new skeleton with the specified skeleton data. */
 	public function new(data:SkeletonData) {
 		if (data == null) {
 			throw new SpineException("data cannot be null.");
@@ -115,8 +143,8 @@ class Skeleton {
 		updateCache();
 	}
 
-	/** Caches information about bones and constraints. Must be called if bones, constraints, or weighted path attachments are
-	 * added or removed. */
+	/** Caches information about bones and constraints. Must be called if the {@link #getSkin()} is modified or if bones,
+	 * constraints, or weighted path attachments are added or removed. */
 	public function updateCache():Void {
 		_updateCache.resize(0);
 
@@ -350,7 +378,10 @@ class Skeleton {
 		}
 	}
 
-	/** Updates the world transform for each bone and applies constraints. */
+	/** Updates the world transform for each bone and applies all constraints.
+	 * <p>
+	 * See <a href="https://esotericsoftware.com/spine-runtime-skeletons#World-transforms">World transforms</a> in the Spine
+	 * Runtimes Guide. */
 	public function updateWorldTransform(physics:Physics):Void {
 		if (physics == null) throw new SpineException("physics is undefined");
 		for (bone in bones) {
@@ -368,6 +399,11 @@ class Skeleton {
 		}
 	}
 
+	/** Temporarily sets the root bone as a child of the specified bone, then updates the world transform for each bone and applies
+	 * all constraints.
+	 * <p>
+	 * See <a href="https://esotericsoftware.com/spine-runtime-skeletons#World-transforms">World transforms</a> in the Spine
+	 * Runtimes Guide. */
 	public function updateWorldTransformWith(physics:Physics, parent:Bone):Void {
 		// Apply the parent bone transform to the root bone. The root bone always inherits scale, rotation and reflection.
 		var rootBone:Bone = rootBone;
@@ -396,7 +432,7 @@ class Skeleton {
 		}
 	}
 
-	/** Sets the bones, constraints, and slots to their setup pose values. */
+	/** Sets the bones, constraints, slots, and draw order to their setup pose values. */
 	public function setToSetupPose():Void {
 		setBonesToSetupPose();
 		setSlotsToSetupPose();
@@ -411,6 +447,7 @@ class Skeleton {
 		for (constraint in this.physicsConstraints) constraint.setToSetupPose();
 	}
 
+	/** Sets the slots and draw order to their setup pose values. */
 	public function setSlotsToSetupPose():Void {
 		var i:Int = 0;
 		for (slot in slots) {
@@ -419,18 +456,21 @@ class Skeleton {
 		}
 	}
 
+	/** The skeleton's setup pose data. */
 	public var data(get, never):SkeletonData;
 
 	private function get_data():SkeletonData {
 		return _data;
 	}
 
-	public var getUpdateCache(get, never):Array<Updatable>;
+	/** The list of bones and constraints, sorted in the order they should be updated, as computed by {@link #updateCache()}. */
+	public var updateCache(get, never):Array<Updatable>;
 
-	private function get_getUpdateCache():Array<Updatable> {
+	private function get_updateCache():Array<Updatable> {
 		return _updateCache;
 	}
 
+	/** Returns the root bone, or null if the skeleton has no bones. */
 	public var rootBone(get, never):Bone;
 
 	private function get_rootBone():Bone {
@@ -439,7 +479,8 @@ class Skeleton {
 		return bones[0];
 	}
 
-	/** @return May be null. */
+	/** Finds a bone by comparing each bone's name. It is more efficient to cache the results of this method than to call it
+	 * repeatedly. */
 	public function findBone(boneName:String):Bone {
 		if (boneName == null) {
 			throw new SpineException("boneName cannot be null.");
@@ -465,7 +506,8 @@ class Skeleton {
 		return -1;
 	}
 
-	/** @return May be null. */
+	/** Finds a slot by comparing each slot's name. It is more efficient to cache the results of this method than to call it
+	 * repeatedly. */
 	public function findSlot(slotName:String):Slot {
 		if (slotName == null) {
 			throw new SpineException("slotName cannot be null.");
@@ -477,8 +519,12 @@ class Skeleton {
 		return null;
 	}
 
+	/** The skeleton's current skin. */
 	public var skinName(get, set):String;
 
+	/** Sets a skin by name.
+	 * <p>
+	 * See {@link #setSkin(Skin)}. */
 	private function set_skinName(skinName:String):String {
 		var skin:Skin = data.findSkin(skinName);
 		if (skin == null)
@@ -492,16 +538,23 @@ class Skeleton {
 		return _skin == null ? null : _skin.name;
 	}
 
+	/** The skeleton's current skin. */
 	public var skin(get, set):Skin;
 
 	private function get_skin():Skin {
 		return _skin;
 	}
 
-	/** Sets the skin used to look up attachments before looking in the {@link SkeletonData#getDefaultSkin() default skin}.
-	 * Attachments from the new skin are attached if the corresponding attachment from the old skin was attached. If there was
-	 * no old skin, each slot's setup mode attachment is attached from the new skin.
-	 * @param newSkin May be null. */
+	/** Sets the skin used to look up attachments before looking in the {@link SkeletonData#getDefaultSkin() default skin}. If the
+	 * skin is changed, {@link #updateCache()} is called.
+	 * <p>
+	 * Attachments from the new skin are attached if the corresponding attachment from the old skin was attached. If there was no
+	 * old skin, each slot's setup mode attachment is attached from the new skin.
+	 * <p>
+	 * After changing the skin, the visible attachments can be reset to those attached in the setup pose by calling
+	 * {@link #setSlotsToSetupPose()}. Also, often {@link AnimationState#apply(Skeleton)} is called before the next time the
+	 * skeleton is rendered to allow any attachment keys in the current animation(s) to hide or show attachments from the new
+	 * skin. */
 	private function set_skin(newSkin:Skin):Skin {
 		if (newSkin == _skin)
 			return null;
@@ -526,12 +579,18 @@ class Skeleton {
 		return _skin;
 	}
 
-	/** @return May be null. */
+	/** Finds an attachment by looking in the {@link #skin} and {@link SkeletonData#defaultSkin} using the slot name and attachment
+	 * name.
+	 * <p>
+	 * See {@link #getAttachment(int, String)}. */
 	public function getAttachmentForSlotName(slotName:String, attachmentName:String):Attachment {
 		return getAttachmentForSlotIndex(data.findSlot(slotName).index, attachmentName);
 	}
 
-	/** @return May be null. */
+	/** Finds an attachment by looking in the {@link #skin} and {@link SkeletonData#defaultSkin} using the slot index and
+	 * attachment name. First the skin is checked and if the attachment was not found, the default skin is checked.
+	 * <p>
+	 * See <a href="https://esotericsoftware.com/spine-runtime-skins">Runtime skins</a> in the Spine Runtimes Guide. */
 	public function getAttachmentForSlotIndex(slotIndex:Int, attachmentName:String):Attachment {
 		if (attachmentName == null)
 			throw new SpineException("attachmentName cannot be null.");
@@ -545,7 +604,9 @@ class Skeleton {
 		return null;
 	}
 
-	/** @param attachmentName May be null. */
+	/** A convenience method to set an attachment by finding the slot with {@link #findSlot(String)}, finding the attachment with
+	 * {@link #getAttachment(int, String)}, then setting the slot's {@link Slot#attachment}.
+	 * @param attachmentName May be null to clear the slot's attachment. */
 	public function setAttachment(slotName:String, attachmentName:String):Void {
 		if (slotName == null)
 			throw new SpineException("slotName cannot be null.");
@@ -567,7 +628,8 @@ class Skeleton {
 		throw new SpineException("Slot not found: " + slotName);
 	}
 
-	/** @return May be null. */
+	/** Finds an IK constraint by comparing each IK constraint's name. It is more efficient to cache the results of this method
+	 * than to call it repeatedly. */
 	public function findIkConstraint(constraintName:String):IkConstraint {
 		if (constraintName == null)
 			throw new SpineException("constraintName cannot be null.");
@@ -578,7 +640,8 @@ class Skeleton {
 		return null;
 	}
 
-	/** @return May be null. */
+	/** Finds a transform constraint by comparing each transform constraint's name. It is more efficient to cache the results of
+	 * this method than to call it repeatedly. */
 	public function findTransformConstraint(constraintName:String):TransformConstraint {
 		if (constraintName == null)
 			throw new SpineException("constraintName cannot be null.");
@@ -589,7 +652,8 @@ class Skeleton {
 		return null;
 	}
 
-	/** @return May be null. */
+	/** Finds a path constraint by comparing each path constraint's name. It is more efficient to cache the results of this method
+	 * than to call it repeatedly. */
 	public function findPathConstraint(constraintName:String):PathConstraint {
 		if (constraintName == null)
 			throw new SpineException("constraintName cannot be null.");
@@ -600,7 +664,8 @@ class Skeleton {
 		return null;
 	}
 
-	/** @return May be null. */
+	/** Finds a physics constraint by comparing each physics constraint's name. It is more efficient to cache the results of this
+	 * method than to call it repeatedly. */
 	public function findPhysicsConstraint(constraintName:String):PhysicsConstraint {
 		if (constraintName == null)
 			throw new SpineException("constraintName cannot be null.");
@@ -618,6 +683,8 @@ class Skeleton {
 	private var _tempVertices = new Array<Float>();
 	private var _bounds = new Rectangle();
 
+	/** Returns the axis aligned bounding box (AABB) of the region and mesh attachments for the current pose.
+	 * Optionally applies clipping. */
 	public function getBounds(clipper: SkeletonClipping = null):Rectangle {
 		var minX:Float = Math.POSITIVE_INFINITY;
 		var minY:Float = Math.POSITIVE_INFINITY;
@@ -674,15 +741,18 @@ class Skeleton {
 		return _bounds;
 	}
 
+	/** Increments the skeleton's {@link #time}. */
 	public function update (delta:Float):Void {
 		time += delta;
 	}
 
+	/** Calls {@link PhysicsConstraint#translate(float, float)} for each physics constraint. */
 	public function physicsTranslate (x:Float, y:Float):Void {
 		for (physicsConstraint in physicsConstraints)
 			physicsConstraint.translate(x, y);
 	}
 
+	/** Calls {@link PhysicsConstraint#rotate(float, float, float)} for each physics constraint. */
 	public function physicsRotate (x:Float, y:Float, degrees:Float):Void {
 		for (physicsConstraint in physicsConstraints)
 			physicsConstraint.rotate(x, y, degrees);
diff --git a/spine-haxe/spine-haxe/spine/SkeletonData.hx b/spine-haxe/spine-haxe/spine/SkeletonData.hx
index f89b4ef22..7889c2c71 100644
--- a/spine-haxe/spine-haxe/spine/SkeletonData.hx
+++ b/spine-haxe/spine-haxe/spine/SkeletonData.hx
@@ -35,29 +35,57 @@ import spine.animation.Animation;
 import spine.atlas.TextureAtlas;
 import spine.attachments.AtlasAttachmentLoader;
 
+/** Stores the setup pose and all of the stateless data for a skeleton.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-runtime-architecture#Data-objects">Data objects</a> in the Spine Runtimes
+ * Guide. */
 class SkeletonData {
-	/** May be null. */
+	/** The skeleton's name, which by default is the name of the skeleton data file when possible, or null when a name hasn't been
+	 * set. */
 	public var name:String;
 
+	/** The skeleton's bones, sorted parent first. The root bone is always the first bone. */
 	public var bones:Array<BoneData> = new Array<BoneData>(); // Ordered parents first.
+	/** The skeleton's slots in the setup pose draw order. */
 	public var slots:Array<SlotData> = new Array<SlotData>(); // Setup pose draw order.
+	/** All skins, including the default skin. */
 	public var skins:Array<Skin> = new Array<Skin>();
+	/** The skeleton's default skin. By default this skin contains all attachments that were not in a skin in Spine.
+	 * <p>
+	 * See {@link Skeleton#getAttachment(int, String)}. */
 	public var defaultSkin:Skin;
+	/** The skeleton's events. */
 	public var events:Array<EventData> = new Array<EventData>();
+	/** The skeleton's animations. */
 	public var animations:Array<Animation> = new Array<Animation>();
+	/** The skeleton's IK constraints. */
 	public var ikConstraints:Array<IkConstraintData> = new Array<IkConstraintData>();
+	/** The skeleton's transform constraints. */
 	public var transformConstraints:Array<TransformConstraintData> = new Array<TransformConstraintData>();
+	/** The skeleton's path constraints. */
 	public var pathConstraints:Array<PathConstraintData> = new Array<PathConstraintData>();
+	/** The skeleton's physics constraints. */
 	public var physicsConstraints:Array<PhysicsConstraintData> = new Array<PhysicsConstraintData>();
+	/** The X coordinate of the skeleton's axis aligned bounding box in the setup pose. */
 	public var x:Float = 0;
+	/** The Y coordinate of the skeleton's axis aligned bounding box in the setup pose. */
 	public var y:Float = 0;
+	/** The width of the skeleton's axis aligned bounding box in the setup pose. */
 	public var width:Float = 0;
+	/** The height of the skeleton's axis aligned bounding box in the setup pose. */
 	public var height:Float = 0;
+	/** Baseline scale factor for applying physics and other effects based on distance to non-scalable properties, such as angle or
+	 * scale. Default is 100. */
 	public var referenceScale:Float = 100;
+	/** The Spine version used to export the skeleton data, or null. */
 	public var version:String;
+	/** The skeleton data hash. This value will change if any of the skeleton data has changed. */
 	public var hash:String;
+	/** The dopesheet FPS in Spine, or zero if nonessential data was not exported. */
 	public var fps:Float = 0;
+	/** The path to the images directory as defined in Spine, or null if nonessential data was not exported. */
 	public var imagesPath:String;
+	/** The path to the audio directory as defined in Spine, or null if nonessential data was not exported. */
 	public var audioPath:String;
 
 	public static function from(data:Dynamic, atlas:TextureAtlas, scale:Float = 1.0):SkeletonData {
@@ -78,7 +106,9 @@ class SkeletonData {
 
 	// --- Bones.
 
-	/** @return May be null. */
+	/** Finds a bone by comparing each bone's name. It is more efficient to cache the results of this method than to call it
+	 * multiple times.
+	 * @return May be null. */
 	public function findBone(boneName:String):BoneData {
 		if (boneName == null)
 			throw new SpineException("boneName cannot be null.");
@@ -90,7 +120,8 @@ class SkeletonData {
 		return null;
 	}
 
-	/** @return -1 if the bone was not found. */
+	/** Finds the index of a bone by comparing each bone's name.
+	 * @return -1 if the bone was not found. */
 	public function findBoneIndex(boneName:String):Int {
 		if (boneName == null)
 			throw new SpineException("boneName cannot be null.");
@@ -103,7 +134,9 @@ class SkeletonData {
 
 	// --- Slots.
 
-	/** @return May be null. */
+	/** Finds a slot by comparing each slot's name. It is more efficient to cache the results of this method than to call it
+	 * multiple times.
+	 * @return May be null. */
 	public function findSlot(slotName:String):SlotData {
 		if (slotName == null)
 			throw new SpineException("slotName cannot be null.");
@@ -117,7 +150,9 @@ class SkeletonData {
 
 	// --- Skins.
 
-	/** @return May be null. */
+	/** Finds a skin by comparing each skin's name. It is more efficient to cache the results of this method than to call it
+	 * multiple times.
+	 * @return May be null. */
 	public function findSkin(skinName:String):Skin {
 		if (skinName == null)
 			throw new SpineException("skinName cannot be null.");
@@ -130,7 +165,9 @@ class SkeletonData {
 
 	// --- Events.
 
-	/** @return May be null. */
+	/** Finds an event by comparing each events's name. It is more efficient to cache the results of this method than to call it
+	 * multiple times.
+	 * @return May be null. */
 	public function findEvent(eventName:String):EventData {
 		if (eventName == null)
 			throw new SpineException("eventName cannot be null.");
@@ -143,7 +180,9 @@ class SkeletonData {
 
 	// --- Animations.
 
-	/** @return May be null. */
+	/** Finds an animation by comparing each animation's name. It is more efficient to cache the results of this method than to
+	 * call it multiple times.
+	 * @return May be null. */
 	public function findAnimation(animationName:String):Animation {
 		if (animationName == null)
 			throw new SpineException("animationName cannot be null.");
@@ -156,7 +195,9 @@ class SkeletonData {
 
 	// --- IK constraints.
 
-	/** @return May be null. */
+	/** Finds an IK constraint by comparing each IK constraint's name. It is more efficient to cache the results of this method
+	 * than to call it multiple times.
+	 * @return May be null. */
 	public function findIkConstraint(constraintName:String):IkConstraintData {
 		if (constraintName == null)
 			throw new SpineException("constraintName cannot be null.");
@@ -169,7 +210,9 @@ class SkeletonData {
 
 	// --- Transform constraints.
 
-	/** @return May be null. */
+	/** Finds a transform constraint by comparing each transform constraint's name. It is more efficient to cache the results of
+	 * this method than to call it multiple times.
+	 * @return May be null. */
 	public function findTransformConstraint(constraintName:String):TransformConstraintData {
 		if (constraintName == null)
 			throw new SpineException("constraintName cannot be null.");
@@ -180,7 +223,8 @@ class SkeletonData {
 		return null;
 	}
 
-	/** @return -1 if the transform constraint was not found. */
+	/** Finds the index of a transform constraint by comparing each transform constraint's name.
+	 * @return -1 if the transform constraint was not found. */
 	public function findTransformConstraintIndex(transformConstraintName:String):Int {
 		if (transformConstraintName == null)
 			throw new SpineException("transformConstraintName cannot be null.");
@@ -193,7 +237,9 @@ class SkeletonData {
 
 	// --- Path constraints.
 
-	/** @return May be null. */
+	/** Finds a path constraint by comparing each path constraint's name. It is more efficient to cache the results of this method
+	 * than to call it multiple times.
+	 * @return May be null. */
 	public function findPathConstraint(constraintName:String):PathConstraintData {
 		if (constraintName == null)
 			throw new SpineException("constraintName cannot be null.");
@@ -205,7 +251,8 @@ class SkeletonData {
 		return null;
 	}
 
-	/** @return -1 if the path constraint was not found. */
+	/** Finds the index of a path constraint by comparing each path constraint's name.
+	 * @return -1 if the path constraint was not found. */
 	public function findPathConstraintIndex(pathConstraintName:String):Int {
 		if (pathConstraintName == null)
 			throw new SpineException("pathConstraintName cannot be null.");
@@ -218,7 +265,9 @@ class SkeletonData {
 
 	// --- Physics constraints.
 
-	/** @return May be null. */
+	/** Finds a physics constraint by comparing each physics constraint's name. It is more efficient to cache the results of this
+	 * method than to call it multiple times.
+	 * @return May be null. */
 	public function findPhysicsConstraint(constraintName:String):PhysicsConstraintData {
 		if (constraintName == null)
 			throw new SpineException("physicsConstraintName cannot be null.");
@@ -230,7 +279,8 @@ class SkeletonData {
 		return null;
 	}
 	
-	/** @return -1 if the path constraint was not found. */
+	/** Finds the index of a physics constraint by comparing each physics constraint's name.
+	 * @return -1 if the physics constraint was not found. */
 	public function findPhysicsConstraintIndex(constraintName:String):Int {
 		if (constraintName == null)
 			throw new SpineException("constraintName cannot be null.");
diff --git a/spine-haxe/spine-haxe/spine/Skin.hx b/spine-haxe/spine-haxe/spine/Skin.hx
index 56e9da5aa..8e52609c4 100644
--- a/spine-haxe/spine-haxe/spine/Skin.hx
+++ b/spine-haxe/spine-haxe/spine/Skin.hx
@@ -33,7 +33,10 @@ import haxe.ds.StringMap;
 import spine.attachments.Attachment;
 import spine.attachments.MeshAttachment;
 
-/** Stores attachments by slot index and attachment name. */
+/** Stores attachments by slot index and attachment name.
+ * 
+ * See SkeletonData {@link SkeletonData#defaultSkin}, Skeleton {@link Skeleton#skin}, and
+ * <a href="https://esotericsoftware.com/spine-runtime-skins">Runtime skins</a> in the Spine Runtimes Guide. */
 class Skin {
 	private var _name:String;
 	private var _attachments:Array<StringMap<Attachment>> = new Array<StringMap<Attachment>>();
@@ -47,6 +50,7 @@ class Skin {
 		_name = name;
 	}
 
+	/** Adds an attachment to the skin for the specified slot index and name. */
 	public function setAttachment(slotIndex:Int, name:String, attachment:Attachment):Void {
 		if (attachment == null)
 			throw new SpineException("attachment cannot be null.");
@@ -57,6 +61,7 @@ class Skin {
 		_attachments[slotIndex].set(name, attachment);
 	}
 
+	/** Adds all attachments, bones, and constraints from the specified skin to this skin. */
 	public function addSkin(skin:Skin):Void {
 		var contained:Bool = false;
 		for (i in 0...skin.bones.length) {
@@ -92,6 +97,8 @@ class Skin {
 		}
 	}
 
+	/** Adds all bones and constraints and copies of all attachments from the specified skin to this skin. Mesh attachments are not
+	 * copied, instead a new linked mesh is created. The attachment copies can be modified without affecting the originals. */
 	public function copySkin(skin:Skin):Void {
 		var contained:Bool = false;
 		var attachment:SkinEntry;
@@ -138,6 +145,7 @@ class Skin {
 		}
 	}
 
+	/** Returns the attachment for the specified slot index and name, or null. */
 	public function getAttachment(slotIndex:Int, name:String):Attachment {
 		if (slotIndex >= _attachments.length)
 			return null;
@@ -145,12 +153,14 @@ class Skin {
 		return dictionary != null ? dictionary.get(name) : null;
 	}
 
+	/** Removes the attachment in the skin for the specified slot index and name, if any. */
 	public function removeAttachment(slotIndex:Int, name:String):Void {
 		var dictionary:StringMap<Attachment> = _attachments[slotIndex];
 		if (dictionary != null)
 			dictionary.remove(name);
 	}
 
+	/** Returns all attachments in this skin. */
 	public function getAttachments():Array<SkinEntry> {
 		var entries:Array<SkinEntry> = new Array<SkinEntry>();
 		for (slotIndex in 0..._attachments.length) {
@@ -166,6 +176,7 @@ class Skin {
 		return entries;
 	}
 
+	/** Returns all attachments in this skin for the specified slot index. */
 	public function getAttachmentsForSlot(slotIndex:Int):Array<SkinEntry> {
 		var entries:Array<SkinEntry> = new Array<SkinEntry>();
 		var attachments:StringMap<Attachment> = _attachments[slotIndex];
@@ -179,6 +190,7 @@ class Skin {
 		return entries;
 	}
 
+	/** Clears all attachments, bones, and constraints. */
 	public function clear():Void {
 		_attachments.resize(0);
 		_bones.resize(0);
@@ -205,12 +217,14 @@ class Skin {
 
 	public var name(get, never):String;
 
+	/** The skin's name, which is unique across all skins in the skeleton. */
 	private function get_name():String {
 		return _name;
 	}
 
 	public var color(get, never):Color;
 
+	/** The color of the skin as it was in Spine, or a default color if nonessential data was not exported. */
 	private function get_color():Color {
 		return _color;
 	}
diff --git a/spine-haxe/spine-haxe/spine/SkinEntry.hx b/spine-haxe/spine-haxe/spine/SkinEntry.hx
index 47057e66e..6d53ca866 100644
--- a/spine-haxe/spine-haxe/spine/SkinEntry.hx
+++ b/spine-haxe/spine-haxe/spine/SkinEntry.hx
@@ -31,8 +31,10 @@ package spine;
 
 import spine.attachments.Attachment;
 
+/** Stores an entry in the skin consisting of the slot index and the attachment name. */
 class SkinEntry {
 	public var slotIndex:Int = 0;
+	/** The name the attachment is associated with, equivalent to the skin placeholder name in the Spine editor. */
 	public var name:String;
 	public var attachment:Attachment;
 
diff --git a/spine-haxe/spine-haxe/spine/Slot.hx b/spine-haxe/spine-haxe/spine/Slot.hx
index 55ed96968..3c042e23d 100644
--- a/spine-haxe/spine-haxe/spine/Slot.hx
+++ b/spine-haxe/spine-haxe/spine/Slot.hx
@@ -32,20 +32,35 @@ package spine;
 import spine.attachments.Attachment;
 import spine.attachments.VertexAttachment;
 
+/** Stores a slot's current pose. Slots organize attachments for {@link Skeleton#drawOrder} purposes and provide a place to store
+ * state for an attachment. State cannot be stored in an attachment itself because attachments are stateless and may be shared
+ * across multiple skeletons. */
 class Slot {
 	private var _data:SlotData;
 	private var _bone:Bone;
 
+	/** The color used to tint the slot's attachment. If {@link #darkColor} is set, this is used as the light color for two
+	 * color tinting. */
 	public var color:Color;
+	/** The dark color used to tint the slot's attachment for two color tinting, or null if two color tinting is not used. The dark
+	 * color's alpha is not used. */
 	public var darkColor:Color;
 
 	private var _attachment:Attachment;
 
+	/** The index of the texture region to display when the slot's attachment has a {@link Sequence}. -1 represents the
+	 * {@link Sequence#setupIndex}. */
 	public var sequenceIndex = -1;
 
 	public var attachmentState:Int = 0;
+	/** Values to deform the slot's attachment. For an unweighted mesh, the entries are local positions for each vertex. For a
+	 * weighted mesh, the entries are an offset for each vertex which will be added to the mesh's local vertex positions.
+	 * <p>
+	 * See {@link VertexAttachment#computeWorldVertices(Slot, int, int, float[], int, int)} and {@link DeformTimeline}. */
+
 	public var deform:Array<Float> = new Array<Float>();
 
+	/** Copy constructor. */
 	public function new(data:SlotData, bone:Bone) {
 		if (data == null)
 			throw new SpineException("data cannot be null.");
@@ -58,34 +73,37 @@ class Slot {
 		setToSetupPose();
 	}
 
+	/** The slot's setup pose data. */
 	public var data(get, never):SlotData;
 
 	private function get_data():SlotData {
 		return _data;
 	}
 
+	/** The bone this slot belongs to. */
 	public var bone(get, never):Bone;
 
 	private function get_bone():Bone {
 		return _bone;
 	}
 
+	/** The skeleton this slot belongs to. */
 	public var skeleton(get, never):Skeleton;
 
 	private function get_skeleton():Skeleton {
 		return _bone.skeleton;
 	}
 
-	/** @return May be null. */
+	/** The current attachment for the slot, or null if the slot has no attachment. */
 	public var attachment(get, set):Attachment;
 
 	private function get_attachment():Attachment {
 		return _attachment;
 	}
 
-	/** Sets the slot's attachment and, if the attachment changed, resets {@link #attachmentTime} and clears the {@link #deform}.
-	 * The deform is not cleared if the old attachment has the same {@link VertexAttachment#getDeformAttachment()} as the specified attachment.
-	 * @param attachment May be null. */
+	/** Sets the slot's attachment and, if the attachment changed, resets {@link #sequenceIndex} and clears the {@link #deform}.
+	 * The deform is not cleared if the old attachment has the same {@link VertexAttachment#timelineAttachment} as the
+	 * specified attachment. */
 	public function set_attachment(attachmentNew:Attachment):Attachment {
 		if (attachment == attachmentNew)
 			return attachmentNew;
@@ -99,6 +117,7 @@ class Slot {
 		return attachmentNew;
 	}
 
+	/** Sets this slot to the setup pose. */
 	public function setToSetupPose():Void {
 		color.setFromColor(data.color);
 		if (darkColor != null)
diff --git a/spine-haxe/spine-haxe/spine/SlotData.hx b/spine-haxe/spine-haxe/spine/SlotData.hx
index 5c3cc2dcd..2d97eba93 100644
--- a/spine-haxe/spine-haxe/spine/SlotData.hx
+++ b/spine-haxe/spine-haxe/spine/SlotData.hx
@@ -29,15 +29,23 @@
 
 package spine;
 
+/** Stores the setup pose for a {@link Slot}. */
 class SlotData {
 	private var _index:Int;
 	private var _name:String;
 	private var _boneData:BoneData;
 
+	/** The color used to tint the slot's attachment. If {@link #getDarkColor()} is set, this is used as the light color for two
+	 * color tinting. */
 	public var color:Color = new Color(1, 1, 1, 1);
+	/** The dark color used to tint the slot's attachment for two color tinting, or null if two color tinting is not used. The dark
+	 * color's alpha is not used. */
 	public var darkColor:Color = null;
+	/** The name of the attachment that is visible for this slot in the setup pose, or null if no attachment is visible. */
 	public var attachmentName:String;
+	/** The blend mode for drawing the slot's attachment. */
 	public var blendMode:BlendMode = BlendMode.normal;
+	/** False if the slot was hidden in Spine and nonessential data was exported. Does not affect runtime rendering. */
 	public var visible:Bool = true;
 
 	public function new(index:Int, name:String, boneData:BoneData) {
@@ -52,18 +60,21 @@ class SlotData {
 		_boneData = boneData;
 	}
 
+	/** The index of the slot in {@link Skeleton#getSlots()}. */
 	public var index(get, never):Int;
 
 	private function get_index():Int {
 		return _index;
 	}
 
+	/** The name of the slot, which is unique across all slots in the skeleton. */
 	public var name(get, never):String;
 
 	private function get_name():String {
 		return _name;
 	}
 
+	/** The bone this slot belongs to. */
 	public var boneData(get, never):BoneData;
 
 	private function get_boneData():BoneData {
diff --git a/spine-haxe/spine-haxe/spine/SpacingMode.hx b/spine-haxe/spine-haxe/spine/SpacingMode.hx
index 2fa38a1d8..7905cc563 100644
--- a/spine-haxe/spine-haxe/spine/SpacingMode.hx
+++ b/spine-haxe/spine-haxe/spine/SpacingMode.hx
@@ -29,6 +29,9 @@
 
 package spine;
 
+/** Controls how bones after the first bone are positioned along the path.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-path-constraints#Spacing-mode">Spacing mode</a> in the Spine User Guide. */
 class SpacingMode {
 	public static var length(default, never):SpacingMode = new SpacingMode("length");
 	public static var fixed(default, never):SpacingMode = new SpacingMode("fixed");
diff --git a/spine-haxe/spine-haxe/spine/TransformConstraint.hx b/spine-haxe/spine-haxe/spine/TransformConstraint.hx
index b89a52cce..8f7b315f5 100644
--- a/spine-haxe/spine-haxe/spine/TransformConstraint.hx
+++ b/spine-haxe/spine-haxe/spine/TransformConstraint.hx
@@ -29,22 +29,34 @@
 
 package spine;
 
+/** Stores the current pose for a transform constraint. A transform constraint adjusts the world transform of the constrained
+ * bones to match that of the target bone.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-transform-constraints">Transform constraints</a> in the Spine User Guide. */
 class TransformConstraint implements Updatable {
 	private var _data:TransformConstraintData;
 	private var _bones:Array<Bone>;
 
+	/** The target bone whose world transform will be copied to the constrained bones. */
 	public var target:Bone;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained rotation. */
 	public var mixRotate:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained translation X. */
 	public var mixX:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained translation Y. */
 	public var mixY:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained scale X. */
 	public var mixScaleX:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained scale Y. */
 	public var mixScaleY:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained shear Y. */
 	public var mixShearY:Float = 0;
 
 	private var _temp:Array<Float> = new Array<Float>();
 
 	public var active:Bool = false;
 
+	/** Copy constructor. */
 	public function new(data:TransformConstraintData, skeleton:Skeleton) {
 		if (data == null)
 			throw new SpineException("data cannot be null.");
@@ -80,6 +92,7 @@ class TransformConstraint implements Updatable {
 		mixShearY = data.mixShearY;
 	}
 
+	/** Applies the constraint to the constrained bones. */
 	public function update(physics:Physics):Void {
 		if (mixRotate == 0 && mixX == 0 && mixY == 0 && mixScaleX == 0 && mixScaleY == 0 && mixShearY == 0)
 			return;
@@ -271,12 +284,14 @@ class TransformConstraint implements Updatable {
 		}
 	}
 
+	/** The transform constraint's setup pose data. */
 	public var data(get, never):TransformConstraintData;
 
 	private function get_data():TransformConstraintData {
 		return _data;
 	}
 
+	/** The bones that will be modified by this transform constraint. */
 	public var bones(get, never):Array<Bone>;
 
 	private function get_bones():Array<Bone> {
diff --git a/spine-haxe/spine-haxe/spine/TransformConstraintData.hx b/spine-haxe/spine-haxe/spine/TransformConstraintData.hx
index 086374492..391eb23c2 100644
--- a/spine-haxe/spine-haxe/spine/TransformConstraintData.hx
+++ b/spine-haxe/spine-haxe/spine/TransformConstraintData.hx
@@ -29,21 +29,37 @@
 
 package spine;
 
+/** Stores the setup pose for a {@link TransformConstraint}.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-transform-constraints">Transform constraints</a> in the Spine User Guide. */
 class TransformConstraintData extends ConstraintData {
 	private var _bones:Array<BoneData> = new Array<BoneData>();
 
+	/** The target bone whose world transform will be copied to the constrained bones. */
 	public var target:BoneData;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained rotation. */
 	public var mixRotate:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained translation X. */
 	public var mixX:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained translation Y. */
 	public var mixY:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained scale X. */
 	public var mixScaleX:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained scale Y. */
 	public var mixScaleY:Float = 0;
+	/** A percentage (0-1) that controls the mix between the constrained and unconstrained shear Y. */
 	public var mixShearY:Float = 0;
+	/** An offset added to the constrained bone rotation. */
 	public var offsetRotation:Float = 0;
+	/** An offset added to the constrained bone X translation. */
 	public var offsetX:Float = 0;
+	/** An offset added to the constrained bone Y translation. */
 	public var offsetY:Float = 0;
+	/** An offset added to the constrained bone scaleX. */
 	public var offsetScaleX:Float = 0;
+	/** An offset added to the constrained bone scaleY. */
 	public var offsetScaleY:Float = 0;
+	/** An offset added to the constrained bone shearY. */
 	public var offsetShearY:Float = 0;
 	public var relative:Bool = false;
 	public var local:Bool = false;
@@ -52,6 +68,7 @@ class TransformConstraintData extends ConstraintData {
 		super(name, 0, false);
 	}
 
+	/** The bones that will be modified by this transform constraint. */
 	public var bones(get, never):Array<BoneData>;
 
 	private function get_bones():Array<BoneData> {
diff --git a/spine-haxe/spine-haxe/spine/Triangulator.hx b/spine-haxe/spine-haxe/spine/Triangulator.hx
index abdc908af..34342d17d 100644
--- a/spine-haxe/spine-haxe/spine/Triangulator.hx
+++ b/spine-haxe/spine-haxe/spine/Triangulator.hx
@@ -29,6 +29,9 @@
 
 package spine;
 
+/**
+ * Triangulator class used for polygon triangulation and decomposition.
+ */
 class Triangulator {
 	private var convexPolygons:Array<Array<Float>> = new Array<Array<Float>>();
 	private var convexPolygonsIndices:Array<Array<Int>> = new Array<Array<Int>>();
@@ -44,6 +47,11 @@ class Triangulator {
 
 	public function new() {}
 
+	/**
+	 * Triangulates a convex or concave polygon.
+	 * @param vertices List of polygon vertices in x,y order.
+	 * @return Indices of triangle vertices in clockwise order.
+	 */
 	public function triangulate(vertices:Array<Float>):Array<Int> {
 		var vertexCount:Int = vertices.length >> 1;
 
@@ -129,6 +137,12 @@ class Triangulator {
 		return triangles;
 	}
 
+	/**
+	 * Decomposes a polygon into convex polygons.
+	 * @param vertices List of polygon vertices in x,y order.
+	 * @param triangles Indices of triangle vertices in clockwise order.
+	 * @return List of convex polygons.
+	 */
 	public function decompose(vertices:Array<Float>, triangles:Array<Int>):Array<Array<Float>> {
 		for (i in 0...convexPolygons.length) {
 			this.polygonPool.free(convexPolygons[i]);
diff --git a/spine-haxe/spine-haxe/spine/Updatable.hx b/spine-haxe/spine-haxe/spine/Updatable.hx
index a7fd9059c..e42b56b33 100644
--- a/spine-haxe/spine-haxe/spine/Updatable.hx
+++ b/spine-haxe/spine-haxe/spine/Updatable.hx
@@ -29,8 +29,17 @@
 
 package spine;
 
+/** The interface for items updated by {@link Skeleton#updateWorldTransform(Physics)}. */
 interface Updatable {
+	/** @param physics Determines how physics and other non-deterministic updates are applied. */
 	function update(physics:Physics):Void;
 
+	/** Returns false when this item won't be updated by
+	 * {@link Skeleton#updateWorldTransform(Physics)} because a skin is required and the
+	 * {@link Skeleton#getSkin() active skin} does not contain this item.
+	 * @see Skin#getBones()
+	 * @see Skin#getConstraints()
+	 * @see BoneData#getSkinRequired()
+	 * @see ConstraintData#getSkinRequired() */
 	function isActive():Bool;
 }
diff --git a/spine-haxe/spine-haxe/spine/animation/AlphaTimeline.hx b/spine-haxe/spine-haxe/spine/animation/AlphaTimeline.hx
index dc9a56ed8..0d7c4a9a1 100644
--- a/spine-haxe/spine-haxe/spine/animation/AlphaTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/AlphaTimeline.hx
@@ -33,6 +33,7 @@ import spine.Event;
 import spine.Skeleton;
 import spine.Slot;
 
+/** Changes the alpha for a slot's {@link Slot#color}. */
 class AlphaTimeline extends CurveTimeline1 implements SlotTimeline {
 	private static inline var ENTRIES:Int = 4;
 	private static inline var R:Float = 1;
diff --git a/spine-haxe/spine-haxe/spine/animation/Animation.hx b/spine-haxe/spine-haxe/spine/animation/Animation.hx
index c636b61b9..28eb33c86 100644
--- a/spine-haxe/spine-haxe/spine/animation/Animation.hx
+++ b/spine-haxe/spine-haxe/spine/animation/Animation.hx
@@ -33,11 +33,14 @@ import haxe.ds.StringMap;
 import spine.Event;
 import spine.Skeleton;
 
+/** Stores a list of timelines to animate a skeleton's pose over time. */
 class Animation {
 	private var _name:String;
 	private var _timelines:Array<Timeline>;
 	private var _timelineIds:StringMap<Bool> = new StringMap<Bool>();
 
+	/** The duration of the animation in seconds, which is usually the highest time of all frames in the timeline. The duration is
+	 * used to know when it has completed and when it should loop back to the start. */
 	public var duration:Float = 0;
 
 	public function new(name:String, timelines:Array<Timeline>, duration:Float) {
@@ -61,6 +64,7 @@ class Animation {
 		}
 	}
 
+	/** Returns true if this animation contains a timeline with any of the specified property IDs. */
 	public function hasTimeline(ids:Array<String>):Bool {
 		for (id in ids) {
 			if (_timelineIds.exists(id))
@@ -69,7 +73,26 @@ class Animation {
 		return false;
 	}
 
-	/** Poses the skeleton at the specified time for this animation. */
+	/** Applies the animation's timelines to the specified skeleton.
+	 * <p>
+	 * See Timeline {@link Timeline#apply(Skeleton, float, float, Array, float, MixBlend, MixDirection)}.
+	 * @param skeleton The skeleton the animation is being applied to. This provides access to the bones, slots, and other skeleton
+	 *           components the timelines may change.
+	 * @param lastTime The last time in seconds this animation was applied. Some timelines trigger only at specific times rather
+	 *           than every frame. Pass -1 the first time an animation is applied to ensure frame 0 is triggered.
+	 * @param time The time in seconds the skeleton is being posed for. Most timelines find the frame before and the frame after
+	 *           this time and interpolate between the frame values. If beyond the {@link #getDuration()} and <code>loop</code> is
+	 *           true then the animation will repeat, else the last frame will be applied.
+	 * @param loop If true, the animation repeats after the {@link #getDuration()}.
+	 * @param events If any events are fired, they are added to this list. Can be null to ignore fired events or if no timelines
+	 *           fire events.
+	 * @param alpha 0 applies the current or setup values (depending on <code>blend</code>). 1 applies the timeline values. Between
+	 *           0 and 1 applies values between the current or setup values and the timeline values. By adjusting
+	 *           <code>alpha</code> over time, an animation can be mixed in or out. <code>alpha</code> can also be useful to apply
+	 *           animations on top of each other (layering).
+	 * @param blend Controls how mixing is applied when <code>alpha</code> < 1.
+	 * @param direction Indicates whether the timelines are mixing in or out. Used by timelines which perform instant transitions,
+	 *           such as {@link DrawOrderTimeline} or {@link AttachmentTimeline}. */
 	public function apply(skeleton:Skeleton, lastTime:Float, time:Float, loop:Bool, events:Array<Event>, alpha:Float, blend:MixBlend,
 			direction:MixDirection):Void {
 		if (skeleton == null)
@@ -88,6 +111,7 @@ class Animation {
 
 	public var name(get, never):String;
 
+	/** The animation's name, which is unique across all animations in the skeleton. */
 	private function get_name():String {
 		return _name;
 	}
@@ -98,6 +122,7 @@ class Animation {
 
 	public var timelines(get, never):Array<Timeline>;
 
+	/** If the returned array or the timelines it contains are modified, {@link #setTimelines(Array)} must be called. */
 	private function get_timelines():Array<Timeline> {
 		return _timelines;
 	}
diff --git a/spine-haxe/spine-haxe/spine/animation/AnimationStateData.hx b/spine-haxe/spine-haxe/spine/animation/AnimationStateData.hx
index 0bf626ba9..1794858c3 100644
--- a/spine-haxe/spine-haxe/spine/animation/AnimationStateData.hx
+++ b/spine-haxe/spine-haxe/spine/animation/AnimationStateData.hx
@@ -32,22 +32,28 @@ package spine.animation;
 import haxe.ds.StringMap;
 import spine.SkeletonData;
 
+/** Stores mix (crossfade) durations to be applied when {@link AnimationState} animations are changed. */
 class AnimationStateData {
 	private var _skeletonData:SkeletonData;
 	private var animationToMixTime:StringMap<Float> = new StringMap<Float>();
 
+	/** The mix duration to use when no mix duration has been defined between two animations. */
 	public var defaultMix:Float = 0;
 
 	public function new(skeletonData:SkeletonData) {
 		_skeletonData = skeletonData;
 	}
 
+	/** The SkeletonData to look up animations when they are specified by name. */
 	public var skeletonData(get, never):SkeletonData;
 
 	private function get_skeletonData():SkeletonData {
 		return _skeletonData;
 	}
 
+	/** Sets a mix duration by animation name.
+	 * 
+	 * See {@link #setMix(Animation, Animation, float)}. */
 	public function setMixByName(fromName:String, toName:String, duration:Float):Void {
 		var from:Animation = _skeletonData.findAnimation(fromName);
 		if (from == null)
@@ -58,6 +64,9 @@ class AnimationStateData {
 		setMix(from, to, duration);
 	}
 
+	/** Sets the mix duration when changing from the specified animation to the other.
+	 * 
+	 * See {@link TrackEntry#mixDuration}. */
 	public function setMix(from:Animation, to:Animation, duration:Float):Void {
 		if (from == null)
 			throw new SpineException("from cannot be null.");
@@ -66,6 +75,8 @@ class AnimationStateData {
 		animationToMixTime.set(from.name + ":" + to.name, duration);
 	}
 
+	/** Returns the mix duration to use when changing from the specified animation to the other, or the {@link #defaultMix} if
+	 * no mix duration has been set. */
 	public function getMix(from:Animation, to:Animation):Float {
 		if (animationToMixTime.exists(from.name + ":" + to.name))
 			return animationToMixTime.get(from.name + ":" + to.name);
diff --git a/spine-haxe/spine-haxe/spine/animation/AttachmentTimeline.hx b/spine-haxe/spine-haxe/spine/animation/AttachmentTimeline.hx
index b6d7b1290..16dcdb234 100644
--- a/spine-haxe/spine-haxe/spine/animation/AttachmentTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/AttachmentTimeline.hx
@@ -33,10 +33,11 @@ import spine.Event;
 import spine.Skeleton;
 import spine.Slot;
 
+/** Changes a slot's attachment. */
 class AttachmentTimeline extends Timeline implements SlotTimeline {
 	public var slotIndex:Int = 0;
 
-	/** The attachment name for each key frame. May contain null values to clear the attachment. */
+	/** The attachment name for each frame. May contain null values to clear the attachment. */
 	public var attachmentNames:Array<String>;
 
 	public function new(frameCount:Int, slotIndex:Int) {
@@ -54,7 +55,9 @@ class AttachmentTimeline extends Timeline implements SlotTimeline {
 		return slotIndex;
 	}
 
-	/** Sets the time in seconds and the attachment name for the specified key frame. */
+	/** Sets the time and attachment name for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param time The frame time in seconds. */
 	public function setFrame(frame:Int, time:Float, attachmentName:String):Void {
 		frames[frame] = time;
 		attachmentNames[frame] = attachmentName;
diff --git a/spine-haxe/spine-haxe/spine/animation/BoneTimeline.hx b/spine-haxe/spine-haxe/spine/animation/BoneTimeline.hx
index fd229ea4d..ac40bd5ff 100644
--- a/spine-haxe/spine-haxe/spine/animation/BoneTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/BoneTimeline.hx
@@ -29,6 +29,8 @@
 
 package spine.animation;
 
+/** An interface for timelines which change the property of a bone. */
 interface BoneTimeline {
+	/** The index of the bone in {@link Skeleton#getBones()} that will be changed when this timeline is applied. */
 	function getBoneIndex():Int;
 }
diff --git a/spine-haxe/spine-haxe/spine/animation/CurveTimeline.hx b/spine-haxe/spine-haxe/spine/animation/CurveTimeline.hx
index 50e39c11d..2d3e3ab47 100644
--- a/spine-haxe/spine-haxe/spine/animation/CurveTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/CurveTimeline.hx
@@ -29,7 +29,7 @@
 
 package spine.animation;
 
-/** Base class for frames that use an interpolation bezier curve. */
+/** The base class for timelines that interpolate between frame values using stepped, linear, or a Bezier curve. */
 class CurveTimeline extends Timeline {
 	private static inline var LINEAR:Int = 0;
 	private static inline var STEPPED:Int = 1;
@@ -38,6 +38,8 @@ class CurveTimeline extends Timeline {
 
 	private var curves:Array<Float>; // type, x, y, ...
 
+	/** @param bezierCount The maximum number of Bezier curves. See {@link #shrink(int)}.
+	 * @param propertyIds Unique identifiers for the properties the timeline modifies. */
 	public function new(frameCount:Int, bezierCount:Int, propertyIds:Array<String>) {
 		super(frameCount, propertyIds);
 		curves = new Array<Float>();
@@ -45,10 +47,14 @@ class CurveTimeline extends Timeline {
 		curves[frameCount - 1] = STEPPED;
 	}
 
+	/** Sets the specified frame to linear interpolation.
+	 * @param frame Between 0 and <code>frameCount - 1</code>, inclusive. */
 	public function setLinear(frame:Int):Void {
 		curves[frame] = LINEAR;
 	}
 
+	/** Sets the specified frame to stepped interpolation.
+	 * @param frame Between 0 and <code>frameCount - 1</code>, inclusive. */
 	public function setStepped(frame:Int):Void {
 		curves[frame] = STEPPED;
 	}
@@ -65,7 +71,7 @@ class CurveTimeline extends Timeline {
 	 * @param bezier The ordinal of this Bezier curve for this timeline, between 0 and <code>bezierCount - 1</code> (specified
 	 *           in the constructor), inclusive.
 	 * @param frame Between 0 and <code>frameCount - 1</code>, inclusive.
-	 * @param value The index of the value for this frame that this curve is used for.
+	 * @param value The index of the value for the frame this curve is used for.
 	 * @param time1 The time for the first key.
 	 * @param value1 The value for the first key.
 	 * @param cx1 The time for the first Bezier handle.
@@ -105,7 +111,7 @@ class CurveTimeline extends Timeline {
 	/** Returns the Bezier interpolated value for the specified time.
 	 * @param frameIndex The index into {@link #getFrames()} for the values of the frame before <code>time</code>.
 	 * @param valueOffset The offset from <code>frameIndex</code> to the value this curve is used for.
-	 * @param i The index of the Bezier segments. See {@link #getCurveType(int)}. */
+	 * @param i The index of the Bezier segments. See {@link #getCurveType}. */
 	public function getBezierValue(time:Float, frameIndex:Int, valueOffset:Int, i:Int):Float {
 		var x:Float, y:Float;
 		if (curves[i] > time) {
diff --git a/spine-haxe/spine-haxe/spine/animation/CurveTimeline1.hx b/spine-haxe/spine-haxe/spine/animation/CurveTimeline1.hx
index 60bc3f54b..882b00cda 100644
--- a/spine-haxe/spine-haxe/spine/animation/CurveTimeline1.hx
+++ b/spine-haxe/spine-haxe/spine/animation/CurveTimeline1.hx
@@ -44,7 +44,7 @@ class CurveTimeline1 extends CurveTimeline {
 		return ENTRIES;
 	}
 
-	/** Sets the time and values for the specified frame.
+	/** Sets the time and value for the specified frame.
 	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
 	 * @param time The frame time in seconds. */
 	public function setFrame(frame:Int, time:Float, value1:Float):Void {
diff --git a/spine-haxe/spine-haxe/spine/animation/DeformTimeline.hx b/spine-haxe/spine-haxe/spine/animation/DeformTimeline.hx
index dc486eed0..cd295210d 100644
--- a/spine-haxe/spine-haxe/spine/animation/DeformTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/DeformTimeline.hx
@@ -36,13 +36,16 @@ import spine.Event;
 import spine.Skeleton;
 import spine.Slot;
 
+/** Changes a slot's {@link Slot#getDeform()} to deform a {@link VertexAttachment}. */
 class DeformTimeline extends CurveTimeline implements SlotTimeline {
 	public var slotIndex:Int = 0;
 
-	/** The attachment that will be deformed. */
+	/** The attachment that will be deformed.
+	 * <p>
+	 * See {@link VertexAttachment#getTimelineAttachment()}. */
 	public var attachment:VertexAttachment;
 
-	/** The vertices for each key frame. */
+	/** The vertices for each frame. */
 	public var vertices:Array<Array<Float>>;
 
 	public function new(frameCount:Int, bezierCount:Int, slotIndex:Int, attachment:VertexAttachment) {
@@ -61,14 +64,25 @@ class DeformTimeline extends CurveTimeline implements SlotTimeline {
 		return slotIndex;
 	}
 
-	/** Sets the time in seconds and the vertices for the specified key frame.
-	 * @param vertices Vertex positions for an unweighted VertexAttachment, or deform offsets if it has weights. */
+	/** Sets the time and vertices for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param time The frame time in seconds.
+	 * @param verticesOrDeform Vertex positions for an unweighted VertexAttachment, or deform offsets if it has weights. */
 	public function setFrame(frame:Int, time:Float, verticesOrDeform:Array<Float>):Void {
 		frames[frame] = time;
 		vertices[frame] = verticesOrDeform;
 	}
 
-	/** @param value1 Ignored (0 is used for a deform timeline).
+	/** @param bezier The bezier index.
+	 * @param frame The frame index.
+	 * @param value Ignored (0 is used for a deform timeline).
+	 * @param time1 The first time.
+	 * @param value1 Ignored (0 is used for a deform timeline).
+	 * @param cx1 The first control point x.
+	 * @param cy1 The first control point y.
+	 * @param cx2 The second control point x.
+	 * @param cy2 The second control point y.
+	 * @param time2 The second time.
 	 * @param value2 Ignored (1 is used for a deform timeline). */
 	public override function setBezier(bezier:Int, frame:Int, value:Float, time1:Float, value1:Float, cx1:Float, cy1:Float, cx2:Float, cy2:Float, time2:Float,
 			value2:Float):Void {
@@ -98,6 +112,8 @@ class DeformTimeline extends CurveTimeline implements SlotTimeline {
 		}
 	}
 
+	/** Returns the interpolated percentage for the specified time.
+	 * @param frame The frame before <code>time</code>. */
 	private function getCurvePercent(time:Float, frame:Int):Float {
 		var i:Int = Std.int(curves[frame]);
 		var x:Float;
diff --git a/spine-haxe/spine-haxe/spine/animation/DrawOrderTimeline.hx b/spine-haxe/spine-haxe/spine/animation/DrawOrderTimeline.hx
index bc301a96f..0479bfe57 100644
--- a/spine-haxe/spine-haxe/spine/animation/DrawOrderTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/DrawOrderTimeline.hx
@@ -33,7 +33,9 @@ import spine.Event;
 import spine.Skeleton;
 import spine.Slot;
 
+/** Changes a skeleton's {@link Skeleton#drawOrder}. */
 class DrawOrderTimeline extends Timeline {
+	/** The draw order for each frame. See {@link #setFrame(Int, Float, Array<Int>)}. */
 	public var drawOrders:Array<Array<Int>>;
 
 	public function new(frameCount:Int) {
@@ -48,7 +50,10 @@ class DrawOrderTimeline extends Timeline {
 		return frames.length;
 	}
 
-	/** Sets the time and value of the specified keyframe. */
+	/** Sets the time and draw order for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param time The frame time in seconds.
+	 * @param drawOrder For each slot in {@link Skeleton#slots}, the index of the slot in the new draw order. May be null to use setup pose draw order. */
 	public function setFrame(frame:Int, time:Float, drawOrder:Array<Int>):Void {
 		frames[frame] = time;
 		drawOrders[frame] = drawOrder;
diff --git a/spine-haxe/spine-haxe/spine/animation/EventQueue.hx b/spine-haxe/spine-haxe/spine/animation/EventQueue.hx
index eed6ff6b8..304fe8089 100644
--- a/spine-haxe/spine-haxe/spine/animation/EventQueue.hx
+++ b/spine-haxe/spine-haxe/spine/animation/EventQueue.hx
@@ -31,6 +31,9 @@ package spine.animation;
 
 import spine.Event;
 
+/**
+ * Stores events raised by AnimationState and allows them to be processed later.
+ */
 class EventQueue {
 	private var objects:Array<Dynamic>;
 	private var animationState:AnimationState;
diff --git a/spine-haxe/spine-haxe/spine/animation/EventTimeline.hx b/spine-haxe/spine-haxe/spine/animation/EventTimeline.hx
index 1cf02d46e..04d17a959 100644
--- a/spine-haxe/spine-haxe/spine/animation/EventTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/EventTimeline.hx
@@ -33,7 +33,9 @@ import spine.animation.Timeline;
 import spine.Event;
 import spine.Skeleton;
 
+/** Fires an {@link Event} when specific animation times are reached. */
 class EventTimeline extends Timeline {
+	/** The event for each frame. */
 	public var events:Array<Event>;
 
 	public function new(frameCount:Int) {
@@ -46,13 +48,15 @@ class EventTimeline extends Timeline {
 		return frames.length;
 	}
 
-	/** Sets the time in seconds and the event for the specified key frame. */
+	/** Sets the time and event for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param event The event to set for the frame. */
 	public function setFrame(frame:Int, event:Event):Void {
 		frames[frame] = event.time;
 		events[frame] = event;
 	}
 
-	/** Fires events for frames > `lastTime` and <= `time`. */
+	/** Fires events for frames > <code>lastTime</code> and <= <code>time</code>. */
 	public override function apply(skeleton:Skeleton, lastTime:Float, time:Float, events:Array<Event>, alpha:Float, blend:MixBlend,
 			direction:MixDirection):Void {
 		if (events == null)
diff --git a/spine-haxe/spine-haxe/spine/animation/EventType.hx b/spine-haxe/spine-haxe/spine/animation/EventType.hx
index 5629860db..48ea1163c 100644
--- a/spine-haxe/spine-haxe/spine/animation/EventType.hx
+++ b/spine-haxe/spine-haxe/spine/animation/EventType.hx
@@ -29,6 +29,9 @@
 
 package spine.animation;
 
+/**
+ * Animation state event type.
+ */
 class EventType {
 	public static var start(default, never):EventType = new EventType();
 	public static var interrupt(default, never):EventType = new EventType();
diff --git a/spine-haxe/spine-haxe/spine/animation/IkConstraintTimeline.hx b/spine-haxe/spine-haxe/spine/animation/IkConstraintTimeline.hx
index 6452a83b3..3a426ddc8 100644
--- a/spine-haxe/spine-haxe/spine/animation/IkConstraintTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/IkConstraintTimeline.hx
@@ -33,6 +33,8 @@ import spine.Event;
 import spine.IkConstraint;
 import spine.Skeleton;
 
+/** Changes an IK constraint's {@link IkConstraint#mix}, {@link IkConstraint#softness},
+ * {@link IkConstraint#bendDirection}, {@link IkConstraint#stretch}, and {@link IkConstraint#compress}. */
 class IkConstraintTimeline extends CurveTimeline {
 	private static inline var ENTRIES:Int = 6;
 	private static inline var MIX:Int = 1;
@@ -41,7 +43,8 @@ class IkConstraintTimeline extends CurveTimeline {
 	private static inline var COMPRESS:Int = 4;
 	private static inline var STRETCH:Int = 5;
 
-	/** The index of the IK constraint in {@link Skeleton#ikConstraints} when this timeline is applied. */
+	/** The index of the IK constraint in {@link Skeleton#ikConstraints} that will be changed when this timeline is
+	 * applied. */
 	public var constraintIndex:Int = 0;
 
 	public function new(frameCount:Int, bezierCount:Int, ikConstraintIndex:Int) {
@@ -53,7 +56,14 @@ class IkConstraintTimeline extends CurveTimeline {
 		return ENTRIES;
 	}
 
-	/** Sets the time in seconds, mix, softness, bend direction, compress, and stretch for the specified key frame. */
+	/** Sets the time, mix, softness, bend direction, compress, and stretch for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param time The frame time in seconds.
+	 * @param mix The mix value.
+	 * @param softness The softness value.
+	 * @param bendDirection 1 or -1.
+	 * @param compress Whether to compress.
+	 * @param stretch Whether to stretch. */
 	public function setFrame(frame:Int, time:Float, mix:Float, softness:Float, bendDirection:Int, compress:Bool, stretch:Bool):Void {
 		frame *= ENTRIES;
 		frames[frame] = time;
diff --git a/spine-haxe/spine-haxe/spine/animation/InheritTimeline.hx b/spine-haxe/spine-haxe/spine/animation/InheritTimeline.hx
index 605eab100..68b9c08a2 100644
--- a/spine-haxe/spine-haxe/spine/animation/InheritTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/InheritTimeline.hx
@@ -33,6 +33,7 @@ import spine.Bone;
 import spine.Event;
 import spine.Skeleton;
 
+/** Changes a bone's {@link Bone#getInherit()}. */
 class InheritTimeline extends Timeline implements BoneTimeline {
 	public static inline var ENTRIES:Int = 2;
 	private static inline var INHERIT:Int = 1;
@@ -52,6 +53,10 @@ class InheritTimeline extends Timeline implements BoneTimeline {
 		return boneIndex;
 	}
 
+	/** Sets the inherit value for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param time The frame time in seconds.
+	 * @param inherit The inherit value for this frame. */
 	public function setFrame(frame:Int, time:Float, inherit: Inherit):Void {
 		frame *= ENTRIES;
 		frames[frame] = time;
diff --git a/spine-haxe/spine-haxe/spine/animation/Listeners.hx b/spine-haxe/spine-haxe/spine/animation/Listeners.hx
index de422b538..8832e1006 100644
--- a/spine-haxe/spine-haxe/spine/animation/Listeners.hx
+++ b/spine-haxe/spine-haxe/spine/animation/Listeners.hx
@@ -29,6 +29,14 @@
 
 package spine.animation;
 
+/** The interface to implement for receiving TrackEntry events. It is always safe to call AnimationState methods when receiving
+ * events.
+ * <p>
+ * TrackEntry events are collected during {@link AnimationState#update(float)} and {@link AnimationState#apply(Skeleton)} and
+ * fired only after those methods are finished.
+ * <p>
+ * See TrackEntry {@link TrackEntry#setListener(AnimationStateListener)} and AnimationState
+ * {@link AnimationState#addListener(AnimationStateListener)}. */
 class Listeners {
 	private var _listeners:Array<TrackEntry->Void>;
 
@@ -42,6 +50,8 @@ class Listeners {
 		_listeners = new Array<TrackEntry->Void>();
 	}
 
+	/** Invoked when this entry has been set as the current entry. {@link #end(TrackEntry)} will occur when this entry will no
+	 * longer be applied. */
 	public function invoke(entry:TrackEntry) {
 		for (listener in _listeners) {
 			listener(entry);
@@ -65,6 +75,14 @@ class Listeners {
 	}
 }
 
+/** The interface to implement for receiving TrackEntry events. It is always safe to call AnimationState methods when receiving
+ * events.
+ * <p>
+ * TrackEntry events are collected during {@link AnimationState#update(float)} and {@link AnimationState#apply(Skeleton)} and
+ * fired only after those methods are finished.
+ * <p>
+ * See TrackEntry {@link TrackEntry#setListener(AnimationStateListener)} and AnimationState
+ * {@link AnimationState#addListener(AnimationStateListener)}. */
 class EventListeners {
 	private var _listeners:Array<TrackEntry->Event->Void>;
 
@@ -78,6 +96,11 @@ class EventListeners {
 		_listeners = new Array<TrackEntry->Event->Void>();
 	}
 
+	/** Invoked when this entry's animation triggers an event. This may occur during mixing (after
+	 * {@link #interrupt(TrackEntry)}), see {@link TrackEntry#eventThreshold}.
+	 * <p>
+	 * Because this event is triggered at the end of {@link AnimationState#apply(Skeleton)}, any animations set in response to
+	 * the event won't be applied until the next time the AnimationState is applied. */
 	public function invoke(entry:TrackEntry, event:Event) {
 		for (listener in _listeners) {
 			listener(entry, event);
diff --git a/spine-haxe/spine-haxe/spine/animation/MixBlend.hx b/spine-haxe/spine-haxe/spine/animation/MixBlend.hx
index 0640c7ee1..0eba43214 100644
--- a/spine-haxe/spine-haxe/spine/animation/MixBlend.hx
+++ b/spine-haxe/spine-haxe/spine/animation/MixBlend.hx
@@ -29,6 +29,10 @@
 
 package spine.animation;
 
+/** Controls how timeline values are mixed with setup pose values or current pose values when a timeline is applied with
+ * <code>alpha</code> < 1.
+ * 
+ * See Timeline {@link Timeline#apply(Skeleton, float, float, Array, float, MixBlend, MixDirection)}. */
 class MixBlend {
 	public var ordinal:Int = 0;
 
@@ -36,8 +40,25 @@ class MixBlend {
 		this.ordinal = ordinal;
 	}
 
+	/** Transitions from the setup value to the timeline value (the current value is not used). Before the first frame, the
+	 * setup value is set. */
 	public static var setup(default, never):MixBlend = new MixBlend(0);
+	/** Transitions from the current value to the timeline value. Before the first frame, transitions from the current value to
+	 * the setup value. Timelines which perform instant transitions, such as {@link DrawOrderTimeline} or
+	 * {@link AttachmentTimeline}, use the setup value before the first frame.
+	 * 
+	 * <code>first</code> is intended for the first animations applied, not for animations layered on top of those. */
 	public static var first(default, never):MixBlend = new MixBlend(1);
+	/** Transitions from the current value to the timeline value. No change is made before the first frame (the current value is
+	 * kept until the first frame).
+	 * 
+	 * <code>replace</code> is intended for animations layered on top of others, not for the first animations applied. */
 	public static var replace(default, never):MixBlend = new MixBlend(2);
+	/** Transitions from the current value to the current value plus the timeline value. No change is made before the first
+	 * frame (the current value is kept until the first frame).
+	 * 
+	 * <code>add</code> is intended for animations layered on top of others, not for the first animations applied. Properties
+	 * set by additive animations must be set manually or by another animation before applying the additive animations, else the
+	 * property values will increase each time the additive animations are applied. */
 	public static var add(default, never):MixBlend = new MixBlend(3);
 }
diff --git a/spine-haxe/spine-haxe/spine/animation/MixDirection.hx b/spine-haxe/spine-haxe/spine/animation/MixDirection.hx
index b379802ff..6a76efa0b 100644
--- a/spine-haxe/spine-haxe/spine/animation/MixDirection.hx
+++ b/spine-haxe/spine-haxe/spine/animation/MixDirection.hx
@@ -29,6 +29,10 @@
 
 package spine.animation;
 
+/** Indicates whether a timeline's alpha is mixing out over time toward 0 (the setup or current pose value) or
+ * mixing in toward 1 (the timeline's value). Some timelines use this to decide how values are applied.
+ *
+ * See Timeline apply(Skeleton, float, float, Array, float, MixBlend, MixDirection). */
 class MixDirection {
 	public var ordinal:Int = 0;
 
diff --git a/spine-haxe/spine-haxe/spine/animation/PathConstraintMixTimeline.hx b/spine-haxe/spine-haxe/spine/animation/PathConstraintMixTimeline.hx
index 6c618eb99..38f54af0f 100644
--- a/spine-haxe/spine-haxe/spine/animation/PathConstraintMixTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/PathConstraintMixTimeline.hx
@@ -33,13 +33,16 @@ import spine.Event;
 import spine.PathConstraint;
 import spine.Skeleton;
 
+/** Changes a path constraint's {@link PathConstraint#getMixRotate()}, {@link PathConstraint#getMixX()}, and
+ * {@link PathConstraint#getMixY()}. */
 class PathConstraintMixTimeline extends CurveTimeline {
 	private static inline var ENTRIES:Int = 4;
 	private static inline var ROTATE:Int = 1;
 	private static inline var X:Int = 2;
 	private static inline var Y:Int = 3;
 
-	/** The index of the path constraint in {@link Skeleton#getPathConstraints()} when this timeline is applied. */
+	/** The index of the path constraint in {@link Skeleton#getPathConstraints()} that will be changed when this timeline is
+	 * applied. */
 	public var constraintIndex:Int = 0;
 
 	public function new(frameCount:Int, bezierCount:Int, pathConstraintIndex:Int) {
@@ -51,6 +54,9 @@ class PathConstraintMixTimeline extends CurveTimeline {
 		return ENTRIES;
 	}
 
+	/** Sets the time and mix values for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param time The frame time in seconds. */
 	public function setFrame(frame:Int, time:Float, mixRotate:Float, mixX:Float, mixY:Float):Void {
 		frame <<= 2;
 		frames[frame] = time;
diff --git a/spine-haxe/spine-haxe/spine/animation/PathConstraintPositionTimeline.hx b/spine-haxe/spine-haxe/spine/animation/PathConstraintPositionTimeline.hx
index 94ea93a9b..d4b96f10e 100644
--- a/spine-haxe/spine-haxe/spine/animation/PathConstraintPositionTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/PathConstraintPositionTimeline.hx
@@ -33,8 +33,10 @@ import spine.Event;
 import spine.PathConstraint;
 import spine.Skeleton;
 
+/** Changes a path constraint's {@link PathConstraint#position}. */
 class PathConstraintPositionTimeline extends CurveTimeline1 {
-	/** The index of the path constraint in {@link Skeleton#pathConstraints}  when this timeline is applied. */
+	/** The index of the path constraint in {@link Skeleton#pathConstraints} that will be changed when this timeline is
+	 * applied. */
 	public var constraintIndex:Int = 0;
 
 	public function new(frameCount:Int, bezierCount:Int, pathConstraintIndex:Int) {
diff --git a/spine-haxe/spine-haxe/spine/animation/PathConstraintSpacingTimeline.hx b/spine-haxe/spine-haxe/spine/animation/PathConstraintSpacingTimeline.hx
index 25bf25ee1..20f02b7a7 100644
--- a/spine-haxe/spine-haxe/spine/animation/PathConstraintSpacingTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/PathConstraintSpacingTimeline.hx
@@ -33,8 +33,10 @@ import spine.Event;
 import spine.PathConstraint;
 import spine.Skeleton;
 
+/** Changes a path constraint's {@link PathConstraint#spacing}. */
 class PathConstraintSpacingTimeline extends CurveTimeline1 {
-	/** The index of the path constraint in {@link Skeleton#pathConstraints} when this timeline is applied. */
+	/** The index of the path constraint in {@link Skeleton#pathConstraints} that will be changed when this timeline is
+	 * applied. */
 	public var constraintIndex:Int = 0;
 
 	public function new(frameCount:Int, bezierCount:Int, pathConstraintIndex:Int) {
diff --git a/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintGravityTimeline.hx b/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintGravityTimeline.hx
index 2706d2a51..544540603 100644
--- a/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintGravityTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintGravityTimeline.hx
@@ -29,7 +29,7 @@
 
 package spine.animation;
 
-/** Changes a physics constraint's {@link PhysicsConstraint#getWind()}. */
+/** Changes a physics constraint's {@link PhysicsConstraint#getGravity()}. */
 class PhysicsConstraintGravityTimeline extends PhysicsConstraintTimeline {
 	public function new(frameCount:Int, bezierCount:Int, physicsConstraintIndex:Int) {
 		super(frameCount, bezierCount, physicsConstraintIndex, Property.physicsConstraintGravity);
diff --git a/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintMixTimeline.hx b/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintMixTimeline.hx
index 1599eb06e..1cd15081b 100644
--- a/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintMixTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintMixTimeline.hx
@@ -29,7 +29,7 @@
 
 package spine.animation;
 
-/** Changes a physics constraint's {@link PhysicsConstraint#getWind()}. */
+/** Changes a physics constraint's {@link PhysicsConstraint#getMix()}. */
 class PhysicsConstraintMixTimeline extends PhysicsConstraintTimeline {
 	public function new(frameCount:Int, bezierCount:Int, physicsConstraintIndex:Int) {
 		super(frameCount, bezierCount, physicsConstraintIndex, Property.physicsConstraintMix);
diff --git a/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintResetTimeline.hx b/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintResetTimeline.hx
index d0b4482aa..07aae8c8b 100644
--- a/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintResetTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/PhysicsConstraintResetTimeline.hx
@@ -33,11 +33,13 @@ import spine.animation.Timeline;
 import spine.Event;
 import spine.Skeleton;
 
+/** Resets a physics constraint when specific animation times are reached. */
 class PhysicsConstraintResetTimeline extends Timeline {
 	/** The index of the physics constraint in {@link Skeleton#physicsConstraints} that will be reset when this timeline is
-	* applied, or -1 if all physics constraints in the skeleton will be reset. */
+	 * applied, or -1 if all physics constraints in the skeleton will be reset. */
 	public var constraintIndex:Int = 0;
 
+	/** @param physicsConstraintIndex -1 for all physics constraints in the skeleton. */
 	public function new(frameCount:Int, physicsConstraintIndex:Int) {
 		propertyIds = [Std.string(Property.physicsConstraintReset)];
 		super(frameCount, propertyIds);
@@ -48,12 +50,13 @@ class PhysicsConstraintResetTimeline extends Timeline {
 		return frames.length;
 	}
 
-	/** Sets the time in seconds and the event for the specified key frame. */
+	/** Sets the time for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive. */
 	public function setFrame(frame:Int, time:Float):Void {
 		frames[frame] = time;
 	}
 
-	/** Resets the physics constraint when frames > lastTime and <= time. */
+	/** Resets the physics constraint when frames > <code>lastTime</code> and <= <code>time</code>. */
 	public override function apply(skeleton:Skeleton, lastTime:Float, time:Float, firedEvents:Array<Event>, alpha:Float, blend:MixBlend,
 			direction:MixDirection):Void {
 		var constraint:PhysicsConstraint = null;
diff --git a/spine-haxe/spine-haxe/spine/animation/Property.hx b/spine-haxe/spine-haxe/spine/animation/Property.hx
index 33546366e..59ea08e8c 100644
--- a/spine-haxe/spine-haxe/spine/animation/Property.hx
+++ b/spine-haxe/spine-haxe/spine/animation/Property.hx
@@ -29,6 +29,9 @@
 
 package spine.animation;
 
+/**
+ * Constants for animation property types.
+ */
 class Property {
 	public static inline var rotate:Int = 0;
 	public static inline var x:Int = 1;
diff --git a/spine-haxe/spine-haxe/spine/animation/RGB2Timeline.hx b/spine-haxe/spine-haxe/spine/animation/RGB2Timeline.hx
index 474686c86..d1b9885a7 100644
--- a/spine-haxe/spine-haxe/spine/animation/RGB2Timeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/RGB2Timeline.hx
@@ -29,6 +29,7 @@
 
 package spine.animation;
 
+/** Changes the RGB for a slot's {@link Slot#getColor()} and {@link Slot#getDarkColor()} for two color tinting. */
 class RGB2Timeline extends CurveTimeline implements SlotTimeline {
 	private static inline var ENTRIES:Int = 7;
 	private static inline var R:Int = 1;
@@ -49,11 +50,21 @@ class RGB2Timeline extends CurveTimeline implements SlotTimeline {
 		return ENTRIES;
 	}
 
+	/** The index of the slot in {@link Skeleton#getSlots()} that will be changed when this timeline is applied. The
+	 * {@link Slot#getDarkColor()} must not be null. */
 	public function getSlotIndex():Int {
 		return slotIndex;
 	}
 
-	/** Sets the time in seconds, light, and dark colors for the specified key frame. */
+	/** Sets the time, light color, and dark color for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param time The frame time in seconds.
+	 * @param r Red component for the light color (0-1).
+	 * @param g Green component for the light color (0-1).
+	 * @param b Blue component for the light color (0-1).
+	 * @param r2 Red component for the dark color (0-1).
+	 * @param g2 Green component for the dark color (0-1).
+	 * @param b2 Blue component for the dark color (0-1). */
 	public function setFrame(frame:Int, time:Float, r:Float, g:Float, b:Float, r2:Float, g2:Float, b2:Float):Void {
 		frame *= ENTRIES;
 		frames[frame] = time;
diff --git a/spine-haxe/spine-haxe/spine/animation/RGBA2Timeline.hx b/spine-haxe/spine-haxe/spine/animation/RGBA2Timeline.hx
index ae63d5014..115670830 100644
--- a/spine-haxe/spine-haxe/spine/animation/RGBA2Timeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/RGBA2Timeline.hx
@@ -29,6 +29,7 @@
 
 package spine.animation;
 
+/** Changes a slot's {@link Slot#getColor()} and {@link Slot#getDarkColor()} for two color tinting. */
 class RGBA2Timeline extends CurveTimeline implements SlotTimeline {
 	private static inline var ENTRIES:Int = 8;
 	private static inline var R:Int = 1;
@@ -54,11 +55,15 @@ class RGBA2Timeline extends CurveTimeline implements SlotTimeline {
 		return ENTRIES;
 	}
 
+	/** The index of the slot in {@link Skeleton#getSlots()} that will be changed when this timeline is applied. The
+	 * {@link Slot#getDarkColor()} must not be null. */
 	public function getSlotIndex():Int {
 		return slotIndex;
 	}
 
-	/** Sets the time in seconds, light, and dark colors for the specified key frame. */
+	/** Sets the time, light color, and dark color for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param time The frame time in seconds. */
 	public function setFrame(frame:Int, time:Float, r:Float, g:Float, b:Float, a:Float, r2:Float, g2:Float, b2:Float):Void {
 		frame <<= 3;
 		frames[frame] = time;
diff --git a/spine-haxe/spine-haxe/spine/animation/RGBATimeline.hx b/spine-haxe/spine-haxe/spine/animation/RGBATimeline.hx
index b9983b0e8..413d0bc72 100644
--- a/spine-haxe/spine-haxe/spine/animation/RGBATimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/RGBATimeline.hx
@@ -29,6 +29,7 @@
 
 package spine.animation;
 
+/** Changes a slot's {@link Slot#getColor()}. */
 class RGBATimeline extends CurveTimeline implements SlotTimeline {
 	private static inline var ENTRIES:Int = 5;
 	private static inline var R:Int = 1;
@@ -51,7 +52,13 @@ class RGBATimeline extends CurveTimeline implements SlotTimeline {
 		return slotIndex;
 	}
 
-	/** Sets the time in seconds, light, and dark colors for the specified key frame. */
+	/** Sets the time and color for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param time The frame time in seconds.
+	 * @param r The red component.
+	 * @param g The green component.
+	 * @param b The blue component.
+	 * @param a The alpha component. */
 	public function setFrame(frame:Int, time:Float, r:Float, g:Float, b:Float, a:Float):Void {
 		frame *= ENTRIES;
 		frames[frame] = time;
diff --git a/spine-haxe/spine-haxe/spine/animation/RGBTimeline.hx b/spine-haxe/spine-haxe/spine/animation/RGBTimeline.hx
index 161748998..6dc8b01c4 100644
--- a/spine-haxe/spine-haxe/spine/animation/RGBTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/RGBTimeline.hx
@@ -29,6 +29,7 @@
 
 package spine.animation;
 
+/** Changes the RGB for a slot's {@link Slot#getColor()}. */
 class RGBTimeline extends CurveTimeline implements SlotTimeline {
 	private static inline var ENTRIES:Int = 4;
 	private static inline var R:Int = 1;
@@ -50,7 +51,9 @@ class RGBTimeline extends CurveTimeline implements SlotTimeline {
 		return slotIndex;
 	}
 
-	/** Sets the time in seconds, light, and dark colors for the specified key frame. */
+	/** Sets the time and color for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param time The frame time in seconds. */
 	public function setFrame(frame:Int, time:Float, r:Float, g:Float, b:Float):Void {
 		frame <<= 2;
 		frames[frame] = time;
diff --git a/spine-haxe/spine-haxe/spine/animation/RotateTimeline.hx b/spine-haxe/spine-haxe/spine/animation/RotateTimeline.hx
index 005eb6ca7..06aebf04f 100644
--- a/spine-haxe/spine-haxe/spine/animation/RotateTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/RotateTimeline.hx
@@ -33,6 +33,7 @@ import spine.Bone;
 import spine.Event;
 import spine.Skeleton;
 
+/** Changes a bone's local {@link Bone#rotation}. */
 class RotateTimeline extends CurveTimeline1 implements BoneTimeline {
 	public var boneIndex:Int = 0;
 
diff --git a/spine-haxe/spine-haxe/spine/animation/ScaleTimeline.hx b/spine-haxe/spine-haxe/spine/animation/ScaleTimeline.hx
index 8c725aad4..de011141a 100644
--- a/spine-haxe/spine-haxe/spine/animation/ScaleTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/ScaleTimeline.hx
@@ -34,6 +34,7 @@ import spine.Event;
 import spine.MathUtils;
 import spine.Skeleton;
 
+/** Changes a bone's local {@link Bone#scaleX} and {@link Bone#scaleY}. */
 class ScaleTimeline extends CurveTimeline2 implements BoneTimeline {
 	private var boneIndex:Int = 0;
 
diff --git a/spine-haxe/spine-haxe/spine/animation/ScaleXTimeline.hx b/spine-haxe/spine-haxe/spine/animation/ScaleXTimeline.hx
index 04c093205..f411dda05 100644
--- a/spine-haxe/spine-haxe/spine/animation/ScaleXTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/ScaleXTimeline.hx
@@ -34,6 +34,7 @@ import spine.Event;
 import spine.MathUtils;
 import spine.Skeleton;
 
+/** Changes a bone's local {@link Bone#scaleX}. */
 class ScaleXTimeline extends CurveTimeline1 implements BoneTimeline {
 	private var boneIndex:Int = 0;
 
diff --git a/spine-haxe/spine-haxe/spine/animation/ScaleYTimeline.hx b/spine-haxe/spine-haxe/spine/animation/ScaleYTimeline.hx
index 2552368a0..0636fdcaf 100644
--- a/spine-haxe/spine-haxe/spine/animation/ScaleYTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/ScaleYTimeline.hx
@@ -34,6 +34,7 @@ import spine.Event;
 import spine.MathUtils;
 import spine.Skeleton;
 
+/** Changes a bone's local {@link Bone#scaleY}. */
 class ScaleYTimeline extends CurveTimeline1 implements BoneTimeline {
 	private var boneIndex:Int = 0;
 
diff --git a/spine-haxe/spine-haxe/spine/animation/SequenceTimeline.hx b/spine-haxe/spine-haxe/spine/animation/SequenceTimeline.hx
index 1107e9842..158802a41 100644
--- a/spine-haxe/spine-haxe/spine/animation/SequenceTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/SequenceTimeline.hx
@@ -32,6 +32,7 @@ package spine.animation;
 import spine.attachments.VertexAttachment;
 import spine.attachments.Attachment;
 
+/** Changes a slot's {@link Slot#getSequenceIndex()} for an attachment's {@link Sequence}. */
 class SequenceTimeline extends Timeline implements SlotTimeline {
 	static var ENTRIES = 3;
 	static var MODE = 1;
@@ -62,7 +63,10 @@ class SequenceTimeline extends Timeline implements SlotTimeline {
 
 	/** Sets the time, mode, index, and frame time for the specified frame.
 	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
-	 * @param time Seconds between frames. */
+	 * @param time Seconds between frames.
+	 * @param mode The sequence mode.
+	 * @param index The sequence index.
+	 * @param delay The delay between frames. */
 	public function setFrame(frame:Int, time:Float, mode:SequenceMode, index:Int, delay:Float) {
 		frame *= SequenceTimeline.ENTRIES;
 		frames[frame] = time;
diff --git a/spine-haxe/spine-haxe/spine/animation/ShearTimeline.hx b/spine-haxe/spine-haxe/spine/animation/ShearTimeline.hx
index 8970c3d70..60f0fc8ee 100644
--- a/spine-haxe/spine-haxe/spine/animation/ShearTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/ShearTimeline.hx
@@ -33,6 +33,7 @@ import spine.Bone;
 import spine.Event;
 import spine.Skeleton;
 
+/** Changes a bone's local {@link Bone#shearX} and {@link Bone#shearY}. */
 class ShearTimeline extends CurveTimeline2 implements BoneTimeline {
 	private var boneIndex:Int = 0;
 
diff --git a/spine-haxe/spine-haxe/spine/animation/ShearXTimeline.hx b/spine-haxe/spine-haxe/spine/animation/ShearXTimeline.hx
index 5b700d70d..f056a29bf 100644
--- a/spine-haxe/spine-haxe/spine/animation/ShearXTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/ShearXTimeline.hx
@@ -33,6 +33,7 @@ import spine.Bone;
 import spine.Event;
 import spine.Skeleton;
 
+/** Changes a bone's local {@link Bone#shearX}. */
 class ShearXTimeline extends CurveTimeline1 implements BoneTimeline {
 	private var boneIndex:Int = 0;
 
diff --git a/spine-haxe/spine-haxe/spine/animation/ShearYTimeline.hx b/spine-haxe/spine-haxe/spine/animation/ShearYTimeline.hx
index 83f1b6cac..b44ee5716 100644
--- a/spine-haxe/spine-haxe/spine/animation/ShearYTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/ShearYTimeline.hx
@@ -33,6 +33,7 @@ import spine.Bone;
 import spine.Event;
 import spine.Skeleton;
 
+/** Changes a bone's local {@link Bone#shearY}. */
 class ShearYTimeline extends CurveTimeline1 implements BoneTimeline {
 	private var boneIndex:Int = 0;
 
diff --git a/spine-haxe/spine-haxe/spine/animation/SlotTimeline.hx b/spine-haxe/spine-haxe/spine/animation/SlotTimeline.hx
index 1d2f73b51..8fe08bd27 100644
--- a/spine-haxe/spine-haxe/spine/animation/SlotTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/SlotTimeline.hx
@@ -29,6 +29,8 @@
 
 package spine.animation;
 
+/** An interface for timelines which change the property of a slot. */
 interface SlotTimeline {
+	/** The index of the slot in {@link Skeleton#getSlots()} that will be changed when this timeline is applied. */
 	function getSlotIndex():Int;
 }
diff --git a/spine-haxe/spine-haxe/spine/animation/Timeline.hx b/spine-haxe/spine-haxe/spine/animation/Timeline.hx
index 59273c1d4..daa3b4629 100644
--- a/spine-haxe/spine-haxe/spine/animation/Timeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/Timeline.hx
@@ -32,32 +32,66 @@ package spine.animation;
 import spine.Event;
 import spine.Skeleton;
 
+/** The base class for all timelines. */
 class Timeline {
+	/** Uniquely encodes both the type of this timeline and the skeleton properties that it affects. */
 	public var propertyIds:Array<String>;
+	/** The time in seconds and any other values for each frame. */
 	public var frames:Array<Float>;
 
+	/**
+	 * @param propertyIds Unique identifiers for the properties the timeline modifies.
+	 * @param frameCount The number of frames for this timeline.
+	 */
 	public function new(frameCount:Int, propertyIds:Array<String>) {
 		this.propertyIds = propertyIds;
 		frames = new Array<Float>();
 		frames.resize(frameCount * getFrameEntries());
 	}
 
+	/** The number of entries stored per frame. */
 	public function getFrameEntries():Int {
 		return 1;
 	}
 
+	/** The number of frames for this timeline. */
 	public function getFrameCount():Int {
 		return Std.int(frames.length / getFrameEntries());
 	}
 
+	/** Returns the duration of this timeline in seconds. */
 	public function getDuration():Float {
 		return frames[frames.length - getFrameEntries()];
 	}
 
+	/** Applies this timeline to the skeleton.
+	 * @param skeleton The skeleton to which the timeline is being applied. This provides access to the bones, slots, and other
+	 *           skeleton components that the timeline may change.
+	 * @param lastTime The last time in seconds this timeline was applied. Timelines such as {@link EventTimeline} trigger only
+	 *           at specific times rather than every frame. In that case, the timeline triggers everything between
+	 *           <code>lastTime</code> (exclusive) and <code>time</code> (inclusive). Pass -1 the first time an animation is
+	 *           applied to ensure frame 0 is triggered.
+	 * @param time The time in seconds that the skeleton is being posed for. Most timelines find the frame before and the frame
+	 *           after this time and interpolate between the frame values. If beyond the last frame, the last frame will be
+	 *           applied.
+	 * @param events If any events are fired, they are added to this list. Can be null to ignore fired events or if the timeline
+	 *           does not fire events.
+	 * @param alpha 0 applies the current or setup value (depending on <code>blend</code>). 1 applies the timeline value.
+	 *           Between 0 and 1 applies a value between the current or setup value and the timeline value. By adjusting
+	 *           <code>alpha</code> over time, an animation can be mixed in or out. <code>alpha</code> can also be useful to
+	 *           apply animations on top of each other (layering).
+	 * @param blend Controls how mixing is applied when <code>alpha</code> < 1.
+	 * @param direction Indicates whether the timeline is mixing in or out. Used by timelines which perform instant transitions,
+	 *           such as {@link DrawOrderTimeline} or {@link AttachmentTimeline}, and others such as {@link ScaleTimeline}.
+	 */
 	public function apply(skeleton:Skeleton, lastTime:Float, time:Float, events:Array<Event>, alpha:Float, blend:MixBlend, direction:MixDirection):Void {
 		throw new SpineException("Timeline implementations must override apply()");
 	}
 
+	/** Linear search using a stride of 1.
+	 * @param time Must be >= the first value in <code>frames</code>.
+	 * @return The index of the first value <= <code>time</code>.
+	 */
 	public static function search1(frames:Array<Float>, time:Float):Int {
 		var n:Int = frames.length;
 		for (i in 1...n) {
@@ -67,6 +101,10 @@ class Timeline {
 		return n - 1;
 	}
 
+	/** Linear search using the specified stride.
+	 * @param time Must be >= the first value in <code>frames</code>.
+	 * @return The index of the first value <= <code>time</code>.
+	 */
 	public static function search(values:Array<Float>, time:Float, step:Int):Int {
 		var n:Int = values.length;
 		var i:Int = step;
diff --git a/spine-haxe/spine-haxe/spine/animation/TrackEntry.hx b/spine-haxe/spine-haxe/spine/animation/TrackEntry.hx
index cf5fbe4bc..33eac8d15 100644
--- a/spine-haxe/spine-haxe/spine/animation/TrackEntry.hx
+++ b/spine-haxe/spine-haxe/spine/animation/TrackEntry.hx
@@ -32,11 +32,24 @@ package spine.animation;
 import spine.animation.Listeners.EventListeners;
 import spine.Poolable;
 
+/** Stores settings and other state for the playback of an animation on an {@link AnimationState} track.
+ * <p>
+ * References to a track entry must not be kept after the {@link AnimationStateListener#dispose(TrackEntry)} event occurs. */
 class TrackEntry implements Poolable {
+	/** The animation to apply for this track entry. */
 	public var animation:Animation;
+	/** The animation queued to start after this animation, or null if there is none. <code>next</code> makes up a doubly linked
+	 * list.
+	 * <p>
+	 * See {@link AnimationState#clearNext(TrackEntry)} to truncate the list. */
 	public var next:TrackEntry;
+	/** The animation queued to play before this animation, or null. <code>previous</code> makes up a doubly linked list. */
 	public var previous:TrackEntry;
+	/** The track entry for the previous animation when mixing from the previous animation to this animation, or null if no
+	 * mixing is currently occurring. When mixing from multiple animations, <code>mixingFrom</code> makes up a linked list. */
 	public var mixingFrom:TrackEntry;
+	/** The track entry for the next animation when mixing from this animation to the next animation, or null if no mixing is
+	 * currently occurring. When mixing to multiple animations, <code>mixingTo</code> makes up a linked list. */
 	public var mixingTo:TrackEntry;
 	public var onStart:Listeners = new Listeners();
 	public var onInterrupt:Listeners = new Listeners();
@@ -44,16 +57,54 @@ class TrackEntry implements Poolable {
 	public var onDispose:Listeners = new Listeners();
 	public var onComplete:Listeners = new Listeners();
 	public var onEvent:EventListeners = new EventListeners();
+	/** The index of the track where this track entry is either current or queued.
+	 * <p>
+	 * See {@link AnimationState#getCurrent(int)}. */
 	public var trackIndex:Int = 0;
+	/** If true, the animation will repeat. If false it will not, instead its last frame is applied if played beyond its
+	 * duration. */
 	public var loop:Bool = false;
+	/** If true, the animation will be applied in reverse. Events are not fired when an animation is applied in reverse. */
 	public var reverse:Bool = false;
+	/** If true, when mixing from the previous animation to this animation, the previous animation is applied as normal instead
+	 * of being mixed out.
+	 * <p>
+	 * When mixing between animations that key the same property, if a lower track also keys that property then the value will
+	 * briefly dip toward the lower track value during the mix. This happens because the first animation mixes from 100% to 0%
+	 * while the second animation mixes from 0% to 100%. Setting <code>holdPrevious</code> to true applies the first animation
+	 * at 100% during the mix so the lower track value is overwritten. Such dipping does not occur on the lowest track which
+	 * keys the property, only when a higher track also keys the property.
+	 * <p>
+	 * Snapping will occur if <code>holdPrevious</code> is true and this animation does not key all the same properties as the
+	 * previous animation. */
 	public var holdPrevious:Bool = false;
+	/** When the mix percentage ({@link #getMixTime()} / {@link #getMixDuration()}) is less than the
+	 * <code>eventThreshold</code>, event timelines are applied while this animation is being mixed out. Defaults to 0, so event
+	 * timelines are not applied while this animation is being mixed out. */
 	public var eventThreshold:Float = 0;
+	/** When the mix percentage ({@link #getMixTime()} / {@link #getMixDuration()}) is less than the
+	 * <code>mixAttachmentThreshold</code>, attachment timelines are applied while this animation is being mixed out. Defaults
+	 * to 0, so attachment timelines are not applied while this animation is being mixed out. */
 	public var mixAttachmentThreshold:Float = 0;
+	/** When {@link #getAlpha()} is greater than <code>alphaAttachmentThreshold</code>, attachment timelines are applied.
+	 * Defaults to 0, so attachment timelines are always applied. */
 	public var alphaAttachmentThreshold:Float = 0;
+	/** When the mix percentage ({@link #getMixTime()} / {@link #getMixDuration()}) is less than the
+	 * <code>mixDrawOrderThreshold</code>, draw order timelines are applied while this animation is being mixed out. Defaults to
+	 * 0, so draw order timelines are not applied while this animation is being mixed out. */
 	public var mixDrawOrderThreshold:Float = 0;
+	/** Seconds when this animation starts, both initially and after looping. Defaults to 0.
+	 * <p>
+	 * When changing the <code>animationStart</code> time, it often makes sense to set {@link #getAnimationLast()} to the same
+	 * value to prevent timeline keys before the start time from triggering. */
 	public var animationStart:Float = 0;
+	/** Seconds for the last frame of this animation. Non-looping animations won't play past this time. Looping animations will
+	 * loop back to {@link #getAnimationStart()} at this time. Defaults to the animation {@link Animation#duration}. */
 	public var animationEnd:Float = 0;
+	/** The time in seconds this animation was last applied. Some timelines use this for one-time triggers. Eg, when this
+	 * animation is applied, event timelines will fire all events between the <code>animationLast</code> time (exclusive) and
+	 * <code>animationTime</code> (inclusive). Defaults to -1 to ensure triggers on frame 0 happen the first time this animation
+	 * is applied. */
 	public var animationLast:Float = 0;
 	public var nextAnimationLast:Float = 0;
 
@@ -70,20 +121,78 @@ class TrackEntry implements Poolable {
 	* afterward, use {@link #setMixDuration(float, float)} so this <code>delay</code> is adjusted. */
 	public var delay(default, set):Float = 0;
 
+	/** Current time in seconds this track entry has been the current track entry. The track time determines
+	 * {@link #getAnimationTime()}. The track time can be set to start the animation at a time other than 0, without affecting
+	 * looping. */
 	public var trackTime:Float = 0;
 	public var trackLast:Float = 0;
 	public var nextTrackLast:Float = 0;
+	/** The track time in seconds when this animation will be removed from the track. Defaults to the highest possible float
+	 * value, meaning the animation will be applied until a new animation is set or the track is cleared. If the track end time
+	 * is reached, no other animations are queued for playback, and mixing from any previous animations is complete, then the
+	 * properties keyed by the animation are set to the setup pose and the track is cleared.
+	 * <p>
+	 * It may be desired to use {@link AnimationState#addEmptyAnimation(int, float, float)} rather than have the animation
+	 * abruptly cease being applied. */
 	public var trackEnd:Float = 0;
+	/** Multiplier for the delta time when this track entry is updated, causing time for this animation to pass slower or
+	 * faster. Defaults to 1.
+	 * <p>
+	 * Values < 0 are not supported. To play an animation in reverse, use {@link #getReverse()}.
+	 * <p>
+	 * {@link #getMixTime()} is not affected by track entry time scale, so {@link #getMixDuration()} may need to be adjusted to
+	 * match the animation speed.
+	 * <p>
+	 * When using {@link AnimationState#addAnimation(int, Animation, boolean, float)} with a <code>delay</code> <= 0, the
+	 * {@link #getDelay()} is set using the mix duration from the {@link AnimationStateData}, assuming time scale to be 1. If
+	 * the time scale is not 1, the delay may need to be adjusted.
+	 * <p>
+	 * See AnimationState {@link AnimationState#getTimeScale()} for affecting all animations. */
 	public var timeScale:Float = 0;
+	/** Values < 1 mix this animation with the skeleton's current pose (usually the pose resulting from lower tracks). Defaults
+	 * to 1, which overwrites the skeleton's current pose with this animation.
+	 * <p>
+	 * Typically track 0 is used to completely pose the skeleton, then alpha is used on higher tracks. It doesn't make sense to
+	 * use alpha on track 0 if the skeleton pose is from the last frame render. */
 	public var alpha:Float = 0;
+	/** Seconds from 0 to the {@link #getMixDuration()} when mixing from the previous animation to this animation. May be
+	 * slightly more than <code>mixDuration</code> when the mix is complete. */
 	public var mixTime:Float = 0;
+	/** Seconds for mixing from the previous animation to this animation. Defaults to the value provided by AnimationStateData
+	 * {@link AnimationStateData#getMix(Animation, Animation)} based on the animation before this animation (if any).
+	 * <p>
+	 * A mix duration of 0 still mixes out over one frame to provide the track entry being mixed out a chance to revert the
+	 * properties it was animating. A mix duration of 0 can be set at any time to end the mix on the next
+	 * {@link AnimationState#update(float) update}.
+	 * <p>
+	 * The <code>mixDuration</code> can be set manually rather than use the value from
+	 * {@link AnimationStateData#getMix(Animation, Animation)}. In that case, the <code>mixDuration</code> can be set for a new
+	 * track entry only before {@link AnimationState#update(float)} is first called.
+	 * <p>
+	 * When using {@link AnimationState#addAnimation(int, Animation, boolean, float)} with a <code>delay</code> <= 0, the
+	 * {@link #getDelay()} is set using the mix duration from the {@link AnimationStateData}. If <code>mixDuration</code> is set
+	 * afterward, the delay may need to be adjusted. For example:<br>
+	 * <code>entry.delay = entry.previous.getTrackComplete() - entry.mixDuration;</code><br>
+	 * Alternatively, {@link #setMixDuration(float, float)} can be used to recompute the delay:<br>
+	 * <code>entry.setMixDuration(0.25f, 0);</code> */
 	public var mixDuration:Float = 0;
 	public var interruptAlpha:Float = 0;
 	public var totalAlpha:Float = 0;
+	/** Controls how properties keyed in the animation are mixed with lower tracks. Defaults to {@link MixBlend#replace}.
+	 * <p>
+	 * Track entries on track 0 ignore this setting and always use {@link MixBlend#first}.
+	 * <p>
+	 * The <code>mixBlend</code> can be set for a new track entry only before {@link AnimationState#apply(Skeleton)} is first
+	 * called. */
 	public var mixBlend:MixBlend = MixBlend.replace;
 	public var timelineMode:Array<Int> = new Array<Int>();
 	public var timelineHoldMix:Array<TrackEntry> = new Array<TrackEntry>();
 	public var timelinesRotation:Array<Float> = new Array<Float>();
+	/** If true, mixing rotation between tracks always uses the shortest rotation direction. If the rotation is animated, the
+	 * shortest rotation direction may change during the mix.
+	 * <p>
+	 * If false, the shortest rotation direction is remembered when the mix starts and the same direction is used for the rest
+	 * of the mix. Defaults to false. */
 	public var shortestRotation = false;
 
 	function set_delay(delay:Float):Float {
@@ -93,6 +202,12 @@ class TrackEntry implements Poolable {
 
 	public function new() {}
 
+	/** Uses {@link #getTrackTime()} to compute the <code>animationTime</code>. When the <code>trackTime</code> is 0, the
+	 * <code>animationTime</code> is equal to the <code>animationStart</code> time.
+	 * <p>
+	 * The <code>animationTime</code> is between {@link #getAnimationStart()} and {@link #getAnimationEnd()}, except if this
+	 * track entry is non-looping and {@link #getAnimationEnd()} is >= to the animation {@link Animation#duration}, then
+	 * <code>animationTime</code> continues to increase past {@link #getAnimationEnd()}. */
 	public function getAnimationTime():Float {
 		if (loop) {
 			var duration:Float = animationEnd - animationStart;
@@ -147,10 +262,22 @@ class TrackEntry implements Poolable {
 		timelinesRotation.resize(0);
 	}
 
+	/** Resets the rotation directions for mixing this entry's rotate timelines. This can be useful to avoid bones rotating the
+	 * long way around when using {@link #getAlpha()} and starting animations on other tracks.
+	 * <p>
+	 * Mixing with {@link MixBlend#replace} involves finding a rotation between two others, which has two possible solutions:
+	 * the short way or the long way around. The two rotations likely change over time, so which direction is the short or long
+	 * way also changes. If the short way was always chosen, bones would flip to the other side when that direction became the
+	 * long way. TrackEntry chooses the short way the first time it is applied and remembers that direction. */
 	public function resetRotationDirection():Void {
 		timelinesRotation.resize(0);
 	}
 
+	/** Sets both {@link #getMixDuration()} and {@link #getDelay()}.
+	 * @param mixDuration If > 0, sets {@link TrackEntry#getDelay()}. If <= 0, the delay set is the duration of the previous track
+	 *           entry minus the specified mix duration plus the specified <code>delay</code> (ie the mix ends at
+	 *           (<code>delay</code> = 0) or before (<code>delay</code> < 0) the previous track entry duration). If the previous
+	 *           entry is looping, its next loop completion is used instead of its duration. */
 	public function setMixDurationWithDelay(mixDuration:Float):Float {
 		this.mixDuration = mixDuration;
 		if (delay <= 0) {
diff --git a/spine-haxe/spine-haxe/spine/animation/TransformConstraintTimeline.hx b/spine-haxe/spine-haxe/spine/animation/TransformConstraintTimeline.hx
index 4727fbd5d..c67874f48 100644
--- a/spine-haxe/spine-haxe/spine/animation/TransformConstraintTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/TransformConstraintTimeline.hx
@@ -34,6 +34,9 @@ import spine.Skeleton;
 import spine.TransformConstraint;
 import spine.TransformConstraintData;
 
+/** Changes a transform constraint's {@link TransformConstraint#mixRotate}, {@link TransformConstraint#mixX},
+ * {@link TransformConstraint#mixY}, {@link TransformConstraint#mixScaleX},
+ * {@link TransformConstraint#mixScaleY}, and {@link TransformConstraint#mixShearY}. */
 class TransformConstraintTimeline extends CurveTimeline {
 	static public inline var ENTRIES:Int = 7;
 	private static inline var ROTATE:Int = 1;
@@ -43,7 +46,8 @@ class TransformConstraintTimeline extends CurveTimeline {
 	private static inline var SCALEY:Int = 5;
 	private static inline var SHEARY:Int = 6;
 
-	/** The index of the transform constraint slot in {@link Skeleton#transformConstraints} that will be changed. */
+	/** The index of the transform constraint in {@link Skeleton#transformConstraints} that will be changed when this
+	 * timeline is applied. */
 	public var constraintIndex:Int = 0;
 
 	public function new(frameCount:Int, bezierCount:Int, transformConstraintIndex:Int) {
@@ -55,7 +59,9 @@ class TransformConstraintTimeline extends CurveTimeline {
 		return ENTRIES;
 	}
 
-	/** The time in seconds, rotate mix, translate mix, scale mix, and shear mix for the specified key frame. */
+	/** Sets the time, rotate mix, translate mix, scale mix, and shear mix for the specified frame.
+	 * @param frame Between 0 and <code>frameCount</code>, inclusive.
+	 * @param time The frame time in seconds. */
 	public function setFrame(frame:Int, time:Float, mixRotate:Float, mixX:Float, mixY:Float, mixScaleX:Float, mixScaleY:Float, mixShearY:Float):Void {
 		frame *= ENTRIES;
 		frames[frame] = time;
diff --git a/spine-haxe/spine-haxe/spine/animation/TranslateTimeline.hx b/spine-haxe/spine-haxe/spine/animation/TranslateTimeline.hx
index b7ce20ec0..0202ae943 100644
--- a/spine-haxe/spine-haxe/spine/animation/TranslateTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/TranslateTimeline.hx
@@ -33,6 +33,7 @@ import spine.Bone;
 import spine.Event;
 import spine.Skeleton;
 
+/** Changes a bone's local {@link Bone#x} and {@link Bone#y}. */
 class TranslateTimeline extends CurveTimeline2 implements BoneTimeline {
 	public var boneIndex:Int = 0;
 
diff --git a/spine-haxe/spine-haxe/spine/animation/TranslateXTimeline.hx b/spine-haxe/spine-haxe/spine/animation/TranslateXTimeline.hx
index a7d7c15b2..cc43a29fb 100644
--- a/spine-haxe/spine-haxe/spine/animation/TranslateXTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/TranslateXTimeline.hx
@@ -33,6 +33,7 @@ import spine.Bone;
 import spine.Event;
 import spine.Skeleton;
 
+/** Changes a bone's local x value. */
 class TranslateXTimeline extends CurveTimeline1 implements BoneTimeline {
 	public var boneIndex:Int = 0;
 
diff --git a/spine-haxe/spine-haxe/spine/animation/TranslateYTimeline.hx b/spine-haxe/spine-haxe/spine/animation/TranslateYTimeline.hx
index 702c2e2ce..0ade5456c 100644
--- a/spine-haxe/spine-haxe/spine/animation/TranslateYTimeline.hx
+++ b/spine-haxe/spine-haxe/spine/animation/TranslateYTimeline.hx
@@ -33,6 +33,7 @@ import spine.Bone;
 import spine.Event;
 import spine.Skeleton;
 
+/** Changes a bone's local {@link Bone#y}. */
 class TranslateYTimeline extends CurveTimeline1 implements BoneTimeline {
 	public var boneIndex:Int = 0;
 
diff --git a/spine-haxe/spine-haxe/spine/atlas/TextureLoader.hx b/spine-haxe/spine-haxe/spine/atlas/TextureLoader.hx
index 37df62cd6..d19680041 100644
--- a/spine-haxe/spine-haxe/spine/atlas/TextureLoader.hx
+++ b/spine-haxe/spine-haxe/spine/atlas/TextureLoader.hx
@@ -29,10 +29,18 @@
 
 package spine.atlas;
 
+/** The interface which can be implemented to customize loading images for texture atlas pages and regions. */
 interface TextureLoader {
+	/** Loads a texture atlas page.
+	 * @param page The page to load.
+	 * @param path The path to the page image. */
 	function loadPage(page:TextureAtlasPage, path:String):Void;
 
+	/** Loads a texture atlas region.
+	 * @param region The region to load. */
 	function loadRegion(region:TextureAtlasRegion):Void;
 
+	/** Unloads a texture atlas page.
+	 * @param page The page to unload. */
 	function unloadPage(page:TextureAtlasPage):Void;
 }
diff --git a/spine-haxe/spine-haxe/spine/attachments/Attachment.hx b/spine-haxe/spine-haxe/spine/attachments/Attachment.hx
index e54335ff7..984a4e94f 100644
--- a/spine-haxe/spine-haxe/spine/attachments/Attachment.hx
+++ b/spine-haxe/spine-haxe/spine/attachments/Attachment.hx
@@ -29,6 +29,7 @@
 
 package spine.attachments;
 
+/** The base class for all attachments. */
 class Attachment {
 	private var _name:String;
 
@@ -39,6 +40,7 @@ class Attachment {
 		_name = name;
 	}
 
+	/** The attachment's name. */
 	public var name(get, never):String;
 
 	private function get_name():String {
@@ -49,6 +51,7 @@ class Attachment {
 		return name;
 	}
 
+	/** Returns a copy of the attachment. */
 	public function copy():Attachment {
 		throw new SpineException("Not implemented");
 	}
diff --git a/spine-haxe/spine-haxe/spine/attachments/AttachmentLoader.hx b/spine-haxe/spine-haxe/spine/attachments/AttachmentLoader.hx
index 612e53d6e..aabc04a65 100644
--- a/spine-haxe/spine-haxe/spine/attachments/AttachmentLoader.hx
+++ b/spine-haxe/spine-haxe/spine/attachments/AttachmentLoader.hx
@@ -31,22 +31,26 @@ package spine.attachments;
 
 import spine.Skin;
 
+/** The interface which can be implemented to customize creating and populating attachments.
+ * <p>
+ * See <a href='https://esotericsoftware.com/spine-loading-skeleton-data#AttachmentLoader'>Loading skeleton data</a> in the Spine
+ * Runtimes Guide. */
 interface AttachmentLoader {
-	/** @return May be null to not load an attachment. */
+	/** @return May be null to not load the attachment. */
 	function newRegionAttachment(skin:Skin, name:String, path:String, sequence:Sequence):RegionAttachment;
 
-	/** @return May be null to not load an attachment. */
+	/** @return May be null to not load the attachment. In that case null should also be returned for child meshes. */
 	function newMeshAttachment(skin:Skin, name:String, path:String, sequence:Sequence):MeshAttachment;
 
-	/** @return May be null to not load an attachment. */
+	/** @return May be null to not load the attachment. */
 	function newBoundingBoxAttachment(skin:Skin, name:String):BoundingBoxAttachment;
 
-	/** @return May be null to not load an attachment */
+	/** @return May be null to not load the attachment. */
 	function newPathAttachment(skin:Skin, name:String):PathAttachment;
 
-	/** @return May be null to not load an attachment */
+	/** @return May be null to not load the attachment. */
 	function newPointAttachment(skin:Skin, name:String):PointAttachment;
 
-	/** @return May be null to not load an attachment */
+	/** @return May be null to not load the attachment. */
 	function newClippingAttachment(skin:Skin, name:String):ClippingAttachment;
 }
diff --git a/spine-haxe/spine-haxe/spine/attachments/AttachmentType.hx b/spine-haxe/spine-haxe/spine/attachments/AttachmentType.hx
index cb4465812..733a4d8b8 100644
--- a/spine-haxe/spine-haxe/spine/attachments/AttachmentType.hx
+++ b/spine-haxe/spine-haxe/spine/attachments/AttachmentType.hx
@@ -29,6 +29,9 @@
 
 package spine.attachments;
 
+/**
+ * The type of attachment.
+ */
 class AttachmentType {
 	public static var region(default, never):AttachmentType = new AttachmentType(0, "region");
 	public static var boundingbox(default, never):AttachmentType = new AttachmentType(1, "boundingbox");
diff --git a/spine-haxe/spine-haxe/spine/attachments/BoundingBoxAttachment.hx b/spine-haxe/spine-haxe/spine/attachments/BoundingBoxAttachment.hx
index 14459d9e9..388c34e15 100644
--- a/spine-haxe/spine-haxe/spine/attachments/BoundingBoxAttachment.hx
+++ b/spine-haxe/spine-haxe/spine/attachments/BoundingBoxAttachment.hx
@@ -31,7 +31,14 @@ package spine.attachments;
 
 import spine.Color;
 
+/** An attachment with vertices that make up a polygon. Can be used for hit detection, creating physics bodies, spawning particle
+ * effects, and more.
+ * <p>
+ * See {@link SkeletonBounds} and <a href="https://esotericsoftware.com/spine-bounding-boxes">Bounding Boxes</a> in the Spine User
+ * Guide. */
 class BoundingBoxAttachment extends VertexAttachment {
+	/** The color of the bounding box as it was in Spine, or a default color if nonessential data was not exported. Bounding boxes
+	 * are not usually rendered at runtime. */
 	public var color:Color = new Color(0, 0, 0, 0);
 
 	public function new(name:String) {
diff --git a/spine-haxe/spine-haxe/spine/attachments/ClippingAttachment.hx b/spine-haxe/spine-haxe/spine/attachments/ClippingAttachment.hx
index 20dc3d4aa..5238926a3 100644
--- a/spine-haxe/spine-haxe/spine/attachments/ClippingAttachment.hx
+++ b/spine-haxe/spine-haxe/spine/attachments/ClippingAttachment.hx
@@ -32,8 +32,13 @@ package spine.attachments;
 import spine.Color;
 import spine.SlotData;
 
+/** An attachment with vertices that make up a polygon used for clipping the rendering of other attachments. */
 class ClippingAttachment extends VertexAttachment {
+	/** Clipping is performed between the clipping attachment's slot and the end slot. If null clipping is done until the end of
+	 * the skeleton's rendering. */
 	public var endSlot:SlotData;
+	/** The color of the clipping attachment as it was in Spine, or a default color if nonessential data was not exported. Clipping
+	 * attachments are not usually rendered at runtime. */
 	public var color:Color = new Color(0.2275, 0.2275, 0.2275, 1);
 
 	public function new(name:String) {
diff --git a/spine-haxe/spine-haxe/spine/attachments/MeshAttachment.hx b/spine-haxe/spine-haxe/spine/attachments/MeshAttachment.hx
index a05c05979..71e584aab 100644
--- a/spine-haxe/spine-haxe/spine/attachments/MeshAttachment.hx
+++ b/spine-haxe/spine-haxe/spine/attachments/MeshAttachment.hx
@@ -33,20 +33,36 @@ import spine.Color;
 import spine.atlas.TextureAtlasRegion;
 import spine.atlas.TextureAtlasPage;
 
+/** An attachment that displays a textured mesh. A mesh has hull vertices and internal vertices within the hull. Holes are not
+ * supported. Each vertex has UVs (texture coordinates) and triangles are used to map an image on to the mesh.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-meshes">Mesh attachments</a> in the Spine User Guide. */
 class MeshAttachment extends VertexAttachment implements HasTextureRegion {
 	public var region:TextureRegion;
 	public var path:String;
+	/** The UV pair for each vertex, normalized within the texture region. */
 	public var regionUVs = new Array<Float>();
+	/** The UV pair for each vertex, normalized within the entire texture.
+	 * See {@link #updateRegion()}. */
 	public var uvs = new Array<Float>();
+	/** Triplets of vertex indices which describe the mesh's triangulation. */
 	public var triangles = new Array<Int>();
 	public var color:Color = new Color(1, 1, 1, 1);
+	/** The width of the mesh's image, or zero if nonessential data was not exported. */
 	public var width:Float = 0;
+	/** The height of the mesh's image, or zero if nonessential data was not exported. */
 	public var height:Float = 0;
+	/** The number of entries at the beginning of {@link #vertices} that make up the mesh hull. */
 	public var hullLength:Int = 0;
+	/** Vertex index pairs describing edges for controlling triangulation, or be null if nonessential data was not exported. Mesh
+	 * triangles will never cross edges. Triangulation is not performed at runtime. */
 	public var edges = new Array<Int>();
 	public var rendererObject:Dynamic;
 	public var sequence:Sequence;
 
+	/** The parent mesh if this is a linked mesh, else null. A linked mesh shares the {@link #bones}, {@link #vertices},
+	 * {@link #regionUVs}, {@link #triangles}, {@link #hullLength}, {@link #edges}, {@link #width}, and {@link #height} with the
+	 * parent mesh, but may have a different {@link #name} or {@link #path} (and therefore a different texture). */
 	private var _parentMesh:MeshAttachment;
 
 	public function new(name:String, path:String) {
@@ -54,6 +70,8 @@ class MeshAttachment extends VertexAttachment implements HasTextureRegion {
 		this.path = path;
 	}
 
+	/** Calculates {@link #uvs} using the {@link #regionUVs} and region. Must be called if the region, the region's properties, or
+	 * the {@link #regionUVs} are changed. */
 	public function updateRegion():Void {
 		if (region == null) {
 			throw new SpineException("Region not set.");
@@ -174,12 +192,14 @@ class MeshAttachment extends VertexAttachment implements HasTextureRegion {
 		return copy;
 	}
 
+	/** If the attachment has a {@link #sequence}, the region may be changed. */
 	public override function computeWorldVertices(slot:Slot, start:Int, count:Int, worldVertices:Array<Float>, offset:Int, stride:Int):Void {
 		if (sequence != null)
 			sequence.apply(slot, this);
 		super.computeWorldVertices(slot, start, count, worldVertices, offset, stride);
 	}
 
+	/** Returns a new mesh with the {@link #parentMesh} set to this mesh's parent mesh, if any, else to this mesh. */
 	public function newLinkedMesh():MeshAttachment {
 		var copy:MeshAttachment = new MeshAttachment(name, path);
 		copy.rendererObject = rendererObject;
diff --git a/spine-haxe/spine-haxe/spine/attachments/PathAttachment.hx b/spine-haxe/spine-haxe/spine/attachments/PathAttachment.hx
index 51976d107..c1be9c61d 100644
--- a/spine-haxe/spine-haxe/spine/attachments/PathAttachment.hx
+++ b/spine-haxe/spine-haxe/spine/attachments/PathAttachment.hx
@@ -31,10 +31,19 @@ package spine.attachments;
 
 import spine.Color;
 
+/** An attachment whose vertices make up a composite Bezier curve.
+ * <p>
+ * See {@link PathConstraint} and <a href="https://esotericsoftware.com/spine-paths">Paths</a> in the Spine User Guide. */
 class PathAttachment extends VertexAttachment {
+	/** The lengths along the path in the setup pose from the start of the path to the end of each Bezier curve. */
 	public var lengths:Array<Float>;
+	/** If true, the start and end knots are connected. */
 	public var closed:Bool = false;
+	/** If true, additional calculations are performed to make computing positions along the path more accurate and movement along
+	 * the path have a constant speed. */
 	public var constantSpeed:Bool = false;
+	/** The color of the path as it was in Spine, or a default color if nonessential data was not exported. Paths are not usually
+	 * rendered at runtime. */
 	public var color:Color = new Color(0, 0, 0, 0);
 
 	public function new(name:String) {
diff --git a/spine-haxe/spine-haxe/spine/attachments/PointAttachment.hx b/spine-haxe/spine-haxe/spine/attachments/PointAttachment.hx
index 89436f823..70c1c87d8 100644
--- a/spine-haxe/spine-haxe/spine/attachments/PointAttachment.hx
+++ b/spine-haxe/spine-haxe/spine/attachments/PointAttachment.hx
@@ -33,10 +33,17 @@ import spine.Bone;
 import spine.Color;
 import spine.MathUtils;
 
+/** An attachment which is a single point and a rotation. This can be used to spawn projectiles, particles, etc. A bone can be
+ * used in similar ways, but a PointAttachment is slightly less expensive to compute and can be hidden, shown, and placed in a
+ * skin.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-points">Point Attachments</a> in the Spine User Guide. */
 class PointAttachment extends VertexAttachment {
 	public var x:Float = 0;
 	public var y:Float = 0;
 	public var rotation:Float = 0;
+	/** The color of the point attachment as it was in Spine, or a default color if nonessential data was not exported. Point
+	 * attachments are not usually rendered at runtime. */
 	public var color:Color = new Color(0.38, 0.94, 0, 1);
 
 	public function new(name:String) {
diff --git a/spine-haxe/spine-haxe/spine/attachments/RegionAttachment.hx b/spine-haxe/spine-haxe/spine/attachments/RegionAttachment.hx
index 188352e2b..b9e9595b1 100644
--- a/spine-haxe/spine-haxe/spine/attachments/RegionAttachment.hx
+++ b/spine-haxe/spine-haxe/spine/attachments/RegionAttachment.hx
@@ -31,6 +31,9 @@ package spine.attachments;
 
 import spine.Color;
 
+/** An attachment that displays a textured quadrilateral.
+ * <p>
+ * See <a href="https://esotericsoftware.com/spine-regions">Region attachments</a> in the Spine User Guide. */
 class RegionAttachment extends Attachment implements HasTextureRegion {
 	public static inline var BLX:Int = 0;
 	public static inline var BLY:Int = 1;
@@ -41,12 +44,19 @@ class RegionAttachment extends Attachment implements HasTextureRegion {
 	public static inline var BRX:Int = 6;
 	public static inline var BRY:Int = 7;
 
+	/** The local x translation. */
 	public var x:Float = 0;
+	/** The local y translation. */
 	public var y:Float = 0;
+	/** The local scaleX. */
 	public var scaleX:Float = 1;
+	/** The local scaleY. */
 	public var scaleY:Float = 1;
+	/** The local rotation. */
 	public var rotation:Float = 0;
+	/** The width of the region attachment in Spine. */
 	public var width:Float = 0;
+	/** The height of the region attachment in Spine. */
 	public var height:Float = 0;
 	public var color:Color = new Color(1, 1, 1, 1);
 	public var path:String;
@@ -54,15 +64,24 @@ class RegionAttachment extends Attachment implements HasTextureRegion {
 	public var region:TextureRegion;
 	public var sequence:Sequence;
 
+	/** For each of the 4 vertices, a pair of <code>x,y</code> values that is the local position of the vertex.
+	 * 
+	 * See {@link #updateRegion()}. */
 	private var offsets:Array<Float> = new Array<Float>();
 
 	public var uvs:Array<Float> = new Array<Float>();
 
+	/** 
+	 * @param name The attachment name.
+	 * @param path The path used to find the region for the attachment.
+	 */
 	public function new(name:String, path:String) {
 		super(name);
 		this.path = path;
 	}
 
+	/** Calculates the {@link #offsets} and {@link #uvs} using the region and the attachment's transform. Must be called if the
+	 * region, the region's properties, or the transform are changed. */
 	public function updateRegion():Void {
 		if (region == null) {
 			throw new SpineException("Region not set.");
@@ -126,6 +145,15 @@ class RegionAttachment extends Attachment implements HasTextureRegion {
 		}
 	}
 
+	/** Transforms the attachment's four vertices to world coordinates. If the attachment has a {@link #sequence}, the region may
+	 * be changed.
+	 * 
+	 * See <a href="https://esotericsoftware.com/spine-runtime-skeletons#World-transforms">World transforms</a> in the Spine
+	 * Runtimes Guide.
+	 * @param slot The slot the attachment is bound to.
+	 * @param worldVertices The output world vertices. Must have a length >= <code>offset</code> + 8.
+	 * @param offset The <code>worldVertices</code> index to begin writing values.
+	 * @param stride The number of <code>worldVertices</code> entries between the value pairs written. */
 	public function computeWorldVertices(slot:Slot, worldVertices:Array<Float>, offset:Int, stride:Int):Void {
 		if (sequence != null)
 			sequence.apply(slot, this);
diff --git a/spine-haxe/spine-haxe/spine/attachments/VertexAttachment.hx b/spine-haxe/spine-haxe/spine/attachments/VertexAttachment.hx
index ad12506d3..723e6a6dd 100644
--- a/spine-haxe/spine-haxe/spine/attachments/VertexAttachment.hx
+++ b/spine-haxe/spine-haxe/spine/attachments/VertexAttachment.hx
@@ -33,13 +33,26 @@ import spine.Bone;
 import spine.Skeleton;
 import spine.Slot;
 
+/** Base class for an attachment with vertices that are transformed by one or more bones and can be deformed by a slot's
+ * {@link Slot#deform}. */
 class VertexAttachment extends Attachment {
 	private static var nextID:Int = 0;
 
+	/** The bones which affect the {@link vertices}. The array entries are, for each vertex, the number of bones affecting
+	 * the vertex followed by that many bone indices, which is the index of the bone in {@link Skeleton#bones}. Will be null
+	 * if this attachment has no weights. */
 	public var bones:Array<Int>;
+	/** The vertex positions in the bone's coordinate system. For a non-weighted attachment, the values are <code>x,y</code>
+	 * entries for each vertex. For a weighted attachment, the values are <code>x,y,weight</code> entries for each bone affecting
+	 * each vertex. */
 	public var vertices = new Array<Float>();
+	/** The maximum number of world vertex values that can be output by
+	 * {@link computeWorldVertices} using the <code>count</code> parameter. */
 	public var worldVerticesLength:Int = 0;
+	/** Returns a unique ID for this attachment. */
 	public var id:Int = nextID++;
+	/** Timelines for the timeline attachment are also applied to this attachment.
+	 * May be null if no attachment-specific timelines should be applied. */
 	public var timelineAttachment:VertexAttachment;
 
 	public function new(name:String) {
@@ -49,15 +62,15 @@ class VertexAttachment extends Attachment {
 
 	/** Transforms the attachment's local {@link #vertices} to world coordinates. If the slot's {@link Slot#deform} is
 	 * not empty, it is used to deform the vertices.
-	 *
-	 * See [World transforms](http://esotericsoftware.com/spine-runtime-skeletons#World-transforms) in the Spine
+	 * <p>
+	 * See <a href="https://esotericsoftware.com/spine-runtime-skeletons#World-transforms">World transforms</a> in the Spine
 	 * Runtimes Guide.
 	 * @param start The index of the first {@link #vertices} value to transform. Each vertex has 2 values, x and y.
-	 * @param count The number of world vertex values to output. Must be <= {@link #worldVerticesLength} - `start`.
-	 * @param worldVertices The output world vertices. Must have a length >= `offset` + `count` *
-	 *           `stride` / 2.
-	 * @param offset The `worldVertices` index to begin writing values.
-	 * @param stride The number of `worldVertices` entries between the value pairs written. */
+	 * @param count The number of world vertex values to output. Must be <= {@link #worldVerticesLength} - <code>start</code>.
+	 * @param worldVertices The output world vertices. Must have a length >= <code>offset</code> + <code>count</code> *
+	 *           <code>stride</code> / 2.
+	 * @param offset The <code>worldVertices</code> index to begin writing values.
+	 * @param stride The number of <code>worldVertices</code> entries between the value pairs written. */
 	public function computeWorldVertices(slot:Slot, start:Int, count:Int, worldVertices:Array<Float>, offset:Int, stride:Int):Void {
 		count = offset + (count >> 1) * stride;
 		var skeleton:Skeleton = slot.skeleton;
@@ -149,6 +162,7 @@ class VertexAttachment extends Attachment {
 		}
 	}
 
+	/** Copy this attachment's data to another attachment. */
 	public function copyTo(attachment:VertexAttachment):Void {
 		if (bones != null) {
 			attachment.bones = bones.copy();
diff --git a/spine-haxe/spine-haxe/spine/flixel/SkeletonMesh.hx b/spine-haxe/spine-haxe/spine/flixel/SkeletonMesh.hx
index 92052745f..95ccfa444 100644
--- a/spine-haxe/spine-haxe/spine/flixel/SkeletonMesh.hx
+++ b/spine-haxe/spine-haxe/spine/flixel/SkeletonMesh.hx
@@ -31,8 +31,9 @@ package spine.flixel;
 
 import flixel.FlxStrip;
 
-// this class is just to make the implementation coherent with the starling implementation
+/** A FlxStrip that draws a skeleton. This class is just to make the implementation coherent with the starling implementation. */
 class SkeletonMesh extends FlxStrip {
+	/** Creates an uninitialized SkeletonMesh. */
 	public function new(/*texture:FlxGraphicAsset*/) {
 		super();
 		// graphic = texture;
diff --git a/spine-haxe/spine-haxe/spine/flixel/SkeletonSprite.hx b/spine-haxe/spine-haxe/spine/flixel/SkeletonSprite.hx
index fb3d639a5..fb73f85c2 100644
--- a/spine-haxe/spine-haxe/spine/flixel/SkeletonSprite.hx
+++ b/spine-haxe/spine-haxe/spine/flixel/SkeletonSprite.hx
@@ -33,6 +33,7 @@ import spine.attachments.RegionAttachment;
 import spine.attachments.ClippingAttachment;
 import spine.flixel.SkeletonMesh;
 
+/** A FlxObject that draws a skeleton. The animation state and skeleton must be updated each frame. */
 class SkeletonSprite extends FlxObject
 {
 	public var skeleton(default, null):Skeleton;
@@ -63,6 +64,7 @@ class SkeletonSprite extends FlxObject
 	private var _tempPoint = new Point();
 
 	private static var QUAD_INDICES:Array<Int> = [0, 1, 2, 2, 3, 0];
+	/** Creates an uninitialized SkeletonSprite. The renderer, skeleton, and animation state must be set before use. */
 	public function new(skeletonData:SkeletonData, animationStateData:AnimationStateData = null)
 	{
 		super(0, 0);
diff --git a/spine-haxe/spine-haxe/spine/starling/SkeletonMesh.hx b/spine-haxe/spine-haxe/spine/starling/SkeletonMesh.hx
index ba5f89ac8..58b5de8a2 100644
--- a/spine-haxe/spine-haxe/spine/starling/SkeletonMesh.hx
+++ b/spine-haxe/spine-haxe/spine/starling/SkeletonMesh.hx
@@ -35,7 +35,9 @@ import starling.rendering.VertexData;
 import starling.styles.MeshStyle;
 import starling.textures.Texture;
 
+/** A Starling Mesh that draws a skeleton. */
 class SkeletonMesh extends Mesh {
+	/** Creates a SkeletonMesh with the specified texture and optional vertex, index data and style. */
 	public function new(texture:Texture, vertexData:VertexData = null, indexData:IndexData = null, style:MeshStyle = null) {
 		super(vertexData == null ? new VertexData() : vertexData, indexData == null ? new IndexData() : indexData, style);
 		this.texture = texture;
diff --git a/spine-haxe/spine-haxe/spine/starling/SkeletonSprite.hx b/spine-haxe/spine-haxe/spine/starling/SkeletonSprite.hx
index fa583d180..caf0814eb 100644
--- a/spine-haxe/spine-haxe/spine/starling/SkeletonSprite.hx
+++ b/spine-haxe/spine-haxe/spine/starling/SkeletonSprite.hx
@@ -57,6 +57,7 @@ import starling.utils.Color;
 import starling.utils.MatrixUtil;
 import starling.utils.Max;
 
+/** A starling display object that draws a skeleton. */
 class SkeletonSprite extends DisplayObject implements IAnimatable {
 	static private var _tempPoint:Point = new Point();
 	static private var _tempMatrix:Matrix = new Matrix();