1 files changed, 67 insertions, 0 deletions
diff --git a/Runtime/Animation/AnimationCurveUtility.h b/Runtime/Animation/AnimationCurveUtility.h
new file mode 100644
index 0000000..c464338
--- /dev/null
+++ b/Runtime/Animation/AnimationCurveUtility.h
@@ -0,0 +1,67 @@
+#pragma once
+
+#include "Runtime/Math/AnimationCurve.h"
+
+
+void EulerToQuaternionCurve (const AnimationCurve& curveX, const AnimationCurve& curveY, const AnimationCurve& curveZ, AnimationCurveQuat& collapsed);
+void QuaternionCurveToEulerCurve (AnimationCurveQuat& quat, AnimationCurve* outCurves[3]);
+
+/// /curve/ is the input float curve
+/// /index/ is the component index in the collapsed curve (x,y,z,w -> usually between 0 and 3)
+/// /collapsed/ is the curve
+/// This functioncall is usually called as many times as there are components (for a quaternion curve 4 times, Vector3 curve 3 times)
+template<class T>
+void CombineCurve (const AnimationCurve& curve, int index, AnimationCurveTpl<T>& collapsed);
+
+void ExpandVector3Curve (AnimationCurveVec3& quat, AnimationCurve* outCurves[3]);
+void ExpandQuaternionCurve (AnimationCurveQuat& quat, AnimationCurve* outCurves[4]);
+
+template<class T>
+void AddLoopingFrame (AnimationCurveTpl<T>& curve, float time);
+
+template<class T>
+bool ClipAnimationCurve (const AnimationCurveTpl<T>& sourceCurve, AnimationCurveTpl<T>& curve, float begin, float end);
+
+int UpdateCurveKey (AnimationCurve& curve, int index, const AnimationCurve::Keyframe& value);
+int MoveCurveKey (AnimationCurve& curve, int index, AnimationCurve::Keyframe value);
+
+// Calculates the keyframes in/out slope based on the bias parameter creating a smooth spline.
+// a bias of zero is default.
+// a positive bias bends the curve to the next key.
+// a negative bias bends the curve to the previous key.
+void RecalculateSplineSlope (AnimationCurveTpl<float>& curve, int key, float bias = 0.0F);
+
+template<class T>
+T InterpolateKeyframe (const KeyframeTpl<T>& lhs, const KeyframeTpl<T>& rhs, float curveT);
+
+int AddInbetweenKey (AnimationCurve& curve, float curveT);
+
+template<class T>
+KeyframeTpl<T> CalculateInbetweenKey(const KeyframeTpl<T>& lhs, const KeyframeTpl<T>& rhs, float curveT);
+
+template<class T>
+KeyframeTpl<T> CalculateInbetweenKey(const AnimationCurveTpl<T>& curve, float curveT);
+
+int AddKeySmoothTangents (AnimationCurve& curve, float time, float value);
+
+template<class T>
+void RecalculateSplineSlope (AnimationCurveTpl<T>& curve);
+
+template<class T>
+void RecalculateSplineSlopeLinear (AnimationCurveTpl<T>& curve, int key);
+
+template<class T>
+void RecalculateSplineSlopeLinear (AnimationCurveTpl<T>& curve);
+
+void EnsureQuaternionContinuityLoopFrame (AnimationCurveQuat& curve);
+void EnsureQuaternionContinuityPreserveSlope (AnimationCurveQuat& curve);
+void EnsureQuaternionContinuityAndRecalculateSlope (AnimationCurveQuat& curve);
+
+template<class T>
+void RecalculateSplineSlopeLoop (AnimationCurveTpl<T>& curve, int key, float b);
+
+// Fits tangents key0.outSlope and key1.inSlope to the point value1 and value2
+// value1 and value2 - points to fit (at time1 and time2)
+template <class T>
+void FitTangents(KeyframeTpl<T>& key0, KeyframeTpl<T>& key1, float time1, float time2, const T& value1, const T& value2);
+