Initial commit

Library/PackageCache/com.unity.timeline@7f8b2fb101b6/Runtime/CurveEditUtility.cs

@@ -0,0 +1,24 @@
+using System;
+
+namespace UnityEngine.Timeline
+{
+    // Utility class for editing animation clips from serialized properties
+    static class CurveEditUtility
+    {
+        // Creates an opposing blend curve that matches the given curve to make sure the result is normalized
+        public static AnimationCurve CreateMatchingCurve(AnimationCurve curve)
+        {
+            Keyframe[] keys = curve.keys;
+
+            for (var i = 0; i != keys.Length; i++)
+            {
+                if (!Single.IsPositiveInfinity(keys[i].inTangent))
+                    keys[i].inTangent = -keys[i].inTangent;
+                if (!Single.IsPositiveInfinity(keys[i].outTangent))
+                    keys[i].outTangent = -keys[i].outTangent;
+                keys[i].value = 1.0f - keys[i].value;
+            }
+            return new AnimationCurve(keys);
+        }
+    }
+}