Renamed visible to active. Added isActive to Updatable/bones/constraints.

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Animation.java

@@ -349,7 +349,7 @@ public class Animation {
 			MixDirection direction) {
 
 			Bone bone = skeleton.bones.get(boneIndex);
-			if (!bone.visible) return;
+			if (!bone.active) return;
 			float[] frames = this.frames;
 			if (time < frames[0]) { // Time is before first frame.
 				switch (blend) {
@@ -447,7 +447,7 @@ public class Animation {
 			MixDirection direction) {
 
 			Bone bone = skeleton.bones.get(boneIndex);
-			if (!bone.visible) return;
+			if (!bone.active) return;
 			float[] frames = this.frames;
 			if (time < frames[0]) { // Time is before first frame.
 				switch (blend) {
@@ -509,7 +509,7 @@ public class Animation {
 			MixDirection direction) {
 
 			Bone bone = skeleton.bones.get(boneIndex);
-			if (!bone.visible) return;
+			if (!bone.active) return;
 			float[] frames = this.frames;
 			if (time < frames[0]) { // Time is before first frame.
 				switch (blend) {
@@ -612,7 +612,7 @@ public class Animation {
 			MixDirection direction) {
 
 			Bone bone = skeleton.bones.get(boneIndex);
-			if (!bone.visible) return;
+			if (!bone.active) return;
 			float[] frames = this.frames;
 			if (time < frames[0]) { // Time is before first frame.
 				switch (blend) {

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/AnimationState.java

@@ -348,7 +348,7 @@ public class AnimationState {
 		}
 
 		Bone bone = skeleton.bones.get(timeline.boneIndex);
-		if (!bone.visible) return;
+		if (!bone.active) return;
 		float[] frames = timeline.frames;
 		float r1, r2;
 		if (time < frames[0]) { // Time is before first frame.

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Bone.java

@@ -54,7 +54,7 @@ public class Bone implements Updatable {
 	float a, b, worldX;
 	float c, d, worldY;
 
-	boolean sorted, visible;
+	boolean sorted, active;
 
 	/** @param parent May be null. */
 	public Bone (BoneData data, Skeleton skeleton, Bone parent) {
@@ -235,6 +235,12 @@ public class Bone implements Updatable {
 		return children;
 	}
 
+	/** Returns false when the bone has not been computed because {@link BoneData#getSkinRequired()} is true and the
+	 * {@link Skeleton#getSkin() active skin} does not {@link Skin#getBones() contain} this bone. */
+	public boolean isActive () {
+		return active;
+	}
+
 	// -- Local transform
 
 	/** The local x translation. */

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java

@@ -45,6 +45,8 @@ public class IkConstraint implements Updatable {
 	boolean compress, stretch;
 	float mix = 1;
 
+	boolean active;
+
 	public IkConstraint (IkConstraintData data, Skeleton skeleton) {
 		if (data == null) throw new IllegalArgumentException("data cannot be null.");
 		if (skeleton == null) throw new IllegalArgumentException("skeleton cannot be null.");
@@ -144,6 +146,10 @@ public class IkConstraint implements Updatable {
 		this.stretch = stretch;
 	}
 
+	public boolean isActive () {
+		return active;
+	}
+
 	/** The IK constraint's setup pose data. */
 	public IkConstraintData getData () {
 		return data;

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/PathConstraint.java

@@ -51,6 +51,8 @@ public class PathConstraint implements Updatable {
 	Slot target;
 	float position, spacing, rotateMix, translateMix;
 
+	boolean active;
+
 	private final FloatArray spaces = new FloatArray(), positions = new FloatArray();
 	private final FloatArray world = new FloatArray(), curves = new FloatArray(), lengths = new FloatArray();
 	private final float[] segments = new float[10];
@@ -498,6 +500,10 @@ public class PathConstraint implements Updatable {
 		this.target = target;
 	}
 
+	public boolean isActive () {
+		return active;
+	}
+
 	/** The path constraint's setup pose data. */
 	public PathConstraintData getData () {
 		return data;

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Skeleton.java

@@ -166,7 +166,7 @@ public class Skeleton {
 		for (int i = 0; i < boneCount; i++) {
 			Bone bone = (Bone)bones[i];
 			bone.sorted = bone.data.skinRequired;
-			bone.visible = !bone.sorted;
+			bone.active = !bone.sorted;
 		}
 		if (skin != null) {
 			Object[] skinBones = skin.bones.items;
@@ -174,7 +174,7 @@ public class Skeleton {
 				Bone bone = (Bone)bones[((BoneData)skinBones[i]).index];
 				do {
 					bone.sorted = false;
-					bone.visible = true;
+					bone.active = true;
 					bone = bone.parent;
 				} while (bone != null);
 			}
@@ -215,7 +215,8 @@ public class Skeleton {
 	}
 
 	private void sortIkConstraint (IkConstraint constraint) {
-		if (constraint.data.skinRequired && (skin == null || !skin.constraints.contains(constraint.data, true))) return;
+		constraint.active = !constraint.data.skinRequired || (skin != null && skin.constraints.contains(constraint.data, true));
+		if (!constraint.active) return;
 
 		Bone target = constraint.target;
 		sortBone(target);
@@ -236,7 +237,8 @@ public class Skeleton {
 	}
 
 	private void sortPathConstraint (PathConstraint constraint) {
-		if (constraint.data.skinRequired && (skin == null || !skin.constraints.contains(constraint.data, true))) return;
+		constraint.active = !constraint.data.skinRequired || (skin != null && skin.constraints.contains(constraint.data, true));
+		if (!constraint.active) return;
 
 		Slot slot = constraint.target;
 		int slotIndex = slot.getData().index;
@@ -262,7 +264,8 @@ public class Skeleton {
 	}
 
 	private void sortTransformConstraint (TransformConstraint constraint) {
-		if (constraint.data.skinRequired && (skin == null || !skin.constraints.contains(constraint.data, true))) return;
+		constraint.active = !constraint.data.skinRequired || (skin != null && skin.constraints.contains(constraint.data, true));
+		if (!constraint.active) return;
 
 		sortBone(constraint.target);
 
@@ -319,7 +322,7 @@ public class Skeleton {
 	private void sortReset (Array<Bone> bones) {
 		for (int i = 0, n = bones.size; i < n; i++) {
 			Bone bone = bones.get(i);
-			if (!bone.visible) continue;
+			if (!bone.active) continue;
 			if (bone.sorted) sortReset(bone.children);
 			bone.sorted = false;
 		}

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/SkeletonRenderer.java

@@ -88,7 +88,7 @@ public class SkeletonRenderer {
 		Array<Slot> drawOrder = skeleton.drawOrder;
 		for (int i = 0, n = drawOrder.size; i < n; i++) {
 			Slot slot = drawOrder.get(i);
-			if (!slot.bone.visible) continue;
+			if (!slot.bone.active) continue;
 			Attachment attachment = slot.attachment;
 			if (attachment instanceof RegionAttachment) {
 				RegionAttachment region = (RegionAttachment)attachment;
@@ -167,7 +167,7 @@ public class SkeletonRenderer {
 		Array<Slot> drawOrder = skeleton.drawOrder;
 		for (int i = 0, n = drawOrder.size; i < n; i++) {
 			Slot slot = drawOrder.get(i);
-			if (!slot.bone.visible) continue;
+			if (!slot.bone.active) continue;
 			Texture texture = null;
 			int vertexSize = clipper.isClipping() ? 2 : 5;
 			Attachment attachment = slot.attachment;
@@ -291,7 +291,7 @@ public class SkeletonRenderer {
 		Array<Slot> drawOrder = skeleton.drawOrder;
 		for (int i = 0, n = drawOrder.size; i < n; i++) {
 			Slot slot = drawOrder.get(i);
-			if (!slot.bone.visible) continue;
+			if (!slot.bone.active) continue;
 			Texture texture = null;
 			int vertexSize = clipper.isClipping() ? 2 : 6;
 			Attachment attachment = slot.attachment;

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/SkeletonRendererDebug.java

@@ -84,7 +84,7 @@ public class SkeletonRendererDebug {
 		if (drawBones) {
 			for (int i = 0, n = bones.size; i < n; i++) {
 				Bone bone = bones.get(i);
-				if (bone.parent == null || !bone.visible) continue;
+				if (bone.parent == null || !bone.active) continue;
 				float length = bone.data.length, width = boneWidth;
 				if (length == 0) {
 					length = 8;
@@ -239,7 +239,7 @@ public class SkeletonRendererDebug {
 			shapes.setColor(boneOriginColor);
 			for (int i = 0, n = bones.size; i < n; i++) {
 				Bone bone = bones.get(i);
-				if (!bone.visible) continue;
+				if (!bone.active) continue;
 				shapes.circle(bone.worldX, bone.worldY, 3 * scale, 8);
 			}
 		}

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/TransformConstraint.java

@@ -43,6 +43,8 @@ public class TransformConstraint implements Updatable {
 	final Array<Bone> bones;
 	Bone target;
 	float rotateMix, translateMix, scaleMix, shearMix;
+
+	boolean active;
 	final Vector2 temp = new Vector2();
 
 	public TransformConstraint (TransformConstraintData data, Skeleton skeleton) {
@@ -338,6 +340,10 @@ public class TransformConstraint implements Updatable {
 		this.shearMix = shearMix;
 	}
 
+	public boolean isActive () {
+		return active;
+	}
+
 	/** The transform constraint's setup pose data. */
 	public TransformConstraintData getData () {
 		return data;

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Updatable.java

@@ -29,6 +29,13 @@
 
 package com.esotericsoftware.spine;
 
+/** The interface for items updated by {@link Skeleton#updateWorldTransform()}. */
 public interface Updatable {
 	public void update ();
+
+	/** Returns false when this item has not been updated because a skine is required and the {@link Skeleton#getSkin() active
+	 * skin} does not contain this item.
+	 * @see Skin#getBones()
+	 * @see Skin#getConstraints() */
+	public boolean isActive ();
 }