[unity] Added file missing in last commit 528ab0c. See #1417.

spine-unity/Assets/Spine/Runtime/spine-unity/Utility/TimelineExtensions.cs

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+/******************************************************************************
+ * Spine Runtimes License Agreement
+ * Last updated January 1, 2020. Replaces all prior versions.
+ *
+ * Copyright (c) 2013-2020, Esoteric Software LLC
+ *
+ * Integration of the Spine Runtimes into software or otherwise creating
+ * derivative works of the Spine Runtimes is permitted under the terms and
+ * conditions of Section 2 of the Spine Editor License Agreement:
+ * http://esotericsoftware.com/spine-editor-license
+ *
+ * Otherwise, it is permitted to integrate the Spine Runtimes into software
+ * or otherwise create derivative works of the Spine Runtimes (collectively,
+ * "Products"), provided that each user of the Products must obtain their own
+ * Spine Editor license and redistribution of the Products in any form must
+ * include this license and copyright notice.
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+ * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
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+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
+ * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
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+ * THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *****************************************************************************/
+
+using UnityEngine;
+using System.Collections.Generic;
+using System.Collections;
+
+namespace Spine.Unity.AnimationTools {
+	public static class TimelineExtensions {
+
+		/// <summary>Evaluates the resulting value of a TranslateTimeline at a given time.
+		/// SkeletonData can be accessed from Skeleton.Data or from SkeletonDataAsset.GetSkeletonData.
+		/// If no SkeletonData is given, values are computed relative to setup pose instead of local-absolute.</summary>
+		public static Vector2 Evaluate (this TranslateTimeline timeline, float time, SkeletonData skeletonData = null) {
+			const int PREV_TIME = -3, PREV_X = -2, PREV_Y = -1;
+			const int X = 1, Y = 2;
+
+			var frames = timeline.frames;
+			if (time < frames[0]) return Vector2.zero;
+
+			float x, y;
+			if (time >= frames[frames.Length - TranslateTimeline.ENTRIES]) { // Time is after last frame.
+				x = frames[frames.Length + PREV_X];
+				y = frames[frames.Length + PREV_Y];
+			}
+			else {
+				// Interpolate between the previous frame and the current frame.
+				int frame = Animation.BinarySearch(frames, time, TranslateTimeline.ENTRIES);
+				x = frames[frame + PREV_X];
+				y = frames[frame + PREV_Y];
+				float frameTime = frames[frame];
+				float percent = timeline.GetCurvePercent(frame / TranslateTimeline.ENTRIES - 1,
+					1 - (time - frameTime) / (frames[frame + PREV_TIME] - frameTime));
+
+				x += (frames[frame + X] - x) * percent;
+				y += (frames[frame + Y] - y) * percent;
+			}
+
+			Vector2 xy = new Vector2(x, y);
+			if (skeletonData == null) {
+				return xy;
+			}
+			else {
+				var boneData = skeletonData.bones.Items[timeline.boneIndex];
+				return xy + new Vector2(boneData.x, boneData.y);
+			}
+		}
+
+		/// <summary>Gets the translate timeline for a given boneIndex.
+		/// You can get the boneIndex using SkeletonData.FindBoneIndex.
+		/// The root bone is always boneIndex 0.
+		/// This will return null if a TranslateTimeline is not found.</summary>
+		public static TranslateTimeline FindTranslateTimelineForBone (this Animation a, int boneIndex) {
+			foreach (var timeline in a.timelines) {
+				if (timeline.GetType().IsSubclassOf(typeof(TranslateTimeline)))
+					continue;
+
+				var translateTimeline = timeline as TranslateTimeline;
+				if (translateTimeline != null && translateTimeline.boneIndex == boneIndex)
+					return translateTimeline;
+			}
+			return null;
+		}
+	}
+}

spine-unity/Assets/Spine/Runtime/spine-unity/Utility/TimelineExtensions.cs.meta

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