1 files changed, 73 insertions, 0 deletions
diff --git a/Runtime/Animation/AnimationClipUtility.cpp b/Runtime/Animation/AnimationClipUtility.cpp
new file mode 100644
index 0000000..7ea1963
--- /dev/null
+++ b/Runtime/Animation/AnimationClipUtility.cpp
@@ -0,0 +1,73 @@
+#include "UnityPrefix.h"
+#include "AnimationClipUtility.h"
+#include "AnimationClip.h"
+#include "AnimationCurveUtility.h"
+
+template <class T>
+void EnsureLoopFrameContinuity (AnimationCurveTpl<T>& curve) {}
+
+template <>
+void EnsureLoopFrameContinuity<Quaternionf> (AnimationCurveTpl<Quaternionf>& curve) 
+{
+	EnsureQuaternionContinuityLoopFrame(curve);
+}
+
+template <class U, class T, typename A>
+void ClipAnimations (const std::vector<T, A>& curves, float startTime, float endTime, float sampleRate, bool duplicateLastFrame, std::vector<T, A>& destinationCurves)
+{
+	for (typename std::vector<T, A>::const_iterator it = curves.begin(); it != curves.end(); ++it)
+	{
+		T newCurve;
+		AssertMsg(it->curve.GetKeyCount() >= 2, "Key count: %d on curve %s", it->curve.GetKeyCount(), it->path.c_str());
+
+		if (ClipAnimationCurve (it->curve, newCurve.curve, startTime, endTime))
+		{
+			it->CopyWithoutCurve(newCurve);
+
+			newCurve.curve.SetPostInfinity(kClamp);
+			newCurve.curve.SetPreInfinity(kClamp);
+			
+			if (duplicateLastFrame)
+			{
+				AddLoopingFrame(newCurve.curve, endTime - startTime + 1.0f/sampleRate);
+				EnsureLoopFrameContinuity(newCurve.curve);
+			}
+			
+			AssertMsg(newCurve.curve.GetKeyCount() >= 2, "Key count: %d on curve %s", newCurve.curve.GetKeyCount(), it->path.c_str());
+			
+			destinationCurves.push_back(newCurve);
+		}
+	}
+}
+
+void ClipAnimation (AnimationClip& sourceClip, AnimationClip& destinationClip, float startTimeSeconds, float endTimeSeconds, bool duplicateLastFrame)
+{
+	if (startTimeSeconds > endTimeSeconds)
+		std::swap(endTimeSeconds, startTimeSeconds);
+	
+	ClipAnimations<Quaternionf>(sourceClip.GetRotationCurves(), startTimeSeconds, endTimeSeconds, sourceClip.GetSampleRate(), duplicateLastFrame, destinationClip.GetRotationCurves());
+	ClipAnimations<Vector3f>(sourceClip.GetPositionCurves(), startTimeSeconds, endTimeSeconds, sourceClip.GetSampleRate(), duplicateLastFrame, destinationClip.GetPositionCurves());
+	ClipAnimations<Vector3f>(sourceClip.GetScaleCurves(), startTimeSeconds, endTimeSeconds, sourceClip.GetSampleRate(), duplicateLastFrame, destinationClip.GetScaleCurves());
+	ClipAnimations<float>(sourceClip.GetFloatCurves(), startTimeSeconds, endTimeSeconds, sourceClip.GetSampleRate(), duplicateLastFrame, destinationClip.GetFloatCurves());
+#if UNITY_EDITOR
+	ClipAnimations<float>(sourceClip.GetEditorCurvesNoConversion(), startTimeSeconds, endTimeSeconds, sourceClip.GetSampleRate(), duplicateLastFrame, destinationClip.GetEditorCurvesNoConversion());
+	AssertIf(sourceClip.GetEditorCurvesNoConversion().size() < destinationClip.GetEditorCurvesNoConversion().size());
+#endif // #if UNITY_EDITOR
+
+	AssertIf(sourceClip.GetRotationCurves().size() < destinationClip.GetRotationCurves().size());
+	AssertIf(sourceClip.GetPositionCurves().size() < destinationClip.GetPositionCurves().size());
+	AssertIf(sourceClip.GetScaleCurves().size() < destinationClip.GetScaleCurves().size());
+	AssertIf(sourceClip.GetFloatCurves().size() < destinationClip.GetFloatCurves().size());
+}
+
+
+void CopyAnimation (AnimationClip& sourceClip, AnimationClip& destinationClip)
+{
+	destinationClip.GetRotationCurves() = sourceClip.GetRotationCurves();
+	destinationClip.GetPositionCurves() = sourceClip.GetPositionCurves();
+	destinationClip.GetScaleCurves() = sourceClip.GetScaleCurves();
+	destinationClip.GetFloatCurves() = sourceClip.GetFloatCurves();
+#if UNITY_EDITOR
+	destinationClip.GetEditorCurvesNoConversion() = sourceClip.GetEditorCurvesNoConversion();
+#endif // #if UNITY_EDITOR
+}