Initial commit

Library/PackageCache/com.unity.timeline@1.2.18/Editor/Extensions/AnimationTrackExtensions.cs

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+using System.Linq;
+using UnityEngine;
+using UnityEngine.Timeline;
+
+namespace UnityEditor.Timeline
+{
+    static class AnimationTrackExtensions
+    {
+        public static void ConvertToClipMode(this AnimationTrack track)
+        {
+            if (!track.CanConvertToClipMode())
+                return;
+
+            TimelineUndo.PushUndo(track, "Convert To Clip");
+
+            if (!track.infiniteClip.empty)
+            {
+                var animClip = track.infiniteClip;
+                TimelineUndo.PushUndo(animClip, "Convert To Clip");
+                TimelineUndo.PushUndo(track, "Convert To Clip");
+                var start = AnimationClipCurveCache.Instance.GetCurveInfo(animClip).keyTimes.FirstOrDefault();
+                animClip.ShiftBySeconds(-start);
+
+                track.infiniteClip = null;
+                var clip = track.CreateClip(animClip);
+
+                clip.start = start;
+                clip.preExtrapolationMode = track.infiniteClipPreExtrapolation;
+                clip.postExtrapolationMode = track.infiniteClipPostExtrapolation;
+                clip.recordable = true;
+                if (Mathf.Abs(animClip.length) < TimelineClip.kMinDuration)
+                {
+                    clip.duration = 1;
+                }
+
+                var animationAsset = clip.asset as AnimationPlayableAsset;
+                if (animationAsset)
+                {
+                    animationAsset.position = track.infiniteClipOffsetPosition;
+                    animationAsset.eulerAngles = track.infiniteClipOffsetEulerAngles;
+
+                    // going to / from infinite mode should reset this. infinite mode
+                    animationAsset.removeStartOffset = track.infiniteClipRemoveOffset;
+                    animationAsset.applyFootIK = track.infiniteClipApplyFootIK;
+                    animationAsset.loop = track.infiniteClipLoop;
+
+                    track.infiniteClipOffsetPosition = Vector3.zero;
+                    track.infiniteClipOffsetEulerAngles = Vector3.zero;
+                }
+
+                track.CalculateExtrapolationTimes();
+            }
+
+            track.infiniteClip = null;
+
+            EditorUtility.SetDirty(track);
+        }
+
+        public static void ConvertFromClipMode(this AnimationTrack track, TimelineAsset timeline)
+        {
+            if (!track.CanConvertFromClipMode())
+                return;
+
+            TimelineUndo.PushUndo(track, "Convert From Clip");
+
+            var clip = track.clips[0];
+            var delta = (float)clip.start;
+            track.infiniteClipTimeOffset = 0.0f;
+            track.infiniteClipPreExtrapolation = clip.preExtrapolationMode;
+            track.infiniteClipPostExtrapolation = clip.postExtrapolationMode;
+
+            var animAsset = clip.asset as AnimationPlayableAsset;
+            if (animAsset)
+            {
+                track.infiniteClipOffsetPosition = animAsset.position;
+                track.infiniteClipOffsetEulerAngles = animAsset.eulerAngles;
+                track.infiniteClipRemoveOffset = animAsset.removeStartOffset;
+                track.infiniteClipApplyFootIK = animAsset.applyFootIK;
+                track.infiniteClipLoop = animAsset.loop;
+            }
+
+            // clone it, it may not be in the same asset
+            var animClip = clip.animationClip;
+
+            float scale = (float)clip.timeScale;
+            if (!Mathf.Approximately(scale, 1.0f))
+            {
+                if (!Mathf.Approximately(scale, 0.0f))
+                    scale = 1.0f / scale;
+                animClip.ScaleTime(scale);
+            }
+
+            TimelineUndo.PushUndo(animClip, "Convert From Clip");
+            animClip.ShiftBySeconds(delta);
+
+            // manually delete the clip
+            var asset = clip.asset;
+            clip.asset = null;
+
+            // Remove the clip, remove old assets
+            ClipModifier.Delete(timeline, clip);
+            TimelineUndo.PushDestroyUndo(null, track, asset, "Convert From Clip");
+
+            track.infiniteClip = animClip;
+
+            EditorUtility.SetDirty(track);
+        }
+
+        public static bool CanConvertToClipMode(this AnimationTrack track)
+        {
+            if (track == null || track.inClipMode)
+                return false;
+            return (track.infiniteClip != null && !track.infiniteClip.empty);
+        }
+
+        // Requirements to go from clip mode
+        //  - one clip, recordable, and animation clip belongs to the same asset as the track
+        public static bool CanConvertFromClipMode(this AnimationTrack track)
+        {
+            if ((track == null) ||
+                (!track.inClipMode) ||
+                (track.clips.Length != 1) ||
+                (track.clips[0].start < 0) ||
+                (!track.clips[0].recordable))
+                return false;
+
+            var asset = track.clips[0].asset as AnimationPlayableAsset;
+            if (asset == null)
+                return false;
+
+            return TimelineHelpers.HaveSameContainerAsset(track, asset.clip);
+        }
+    }
+}