// UnityEditor.CurveUtility.cs (c) Unity Technologies
public static void UpdateTangentsFromMode(AnimationCurve curve, int index)
{
if (index < 0 || index >= curve.length)
{
return;
}
Keyframe key = curve[index];
if (KeyframeUtil.GetKeyTangentMode(key, 0) == TangentMode.Linear && index >= 1)
{
key.inTangent = CalculateLinearTangent(curve, index, index - 1);
curve.MoveKey(index, key);
}
if (KeyframeUtil.GetKeyTangentMode(key, 1) == TangentMode.Linear && index + 1 < curve.length)
{
key.outTangent = CalculateLinearTangent(curve, index, index + 1);
curve.MoveKey(index, key);
}
if (KeyframeUtil.GetKeyTangentMode(key, 0) != TangentMode.Smooth && KeyframeUtil.GetKeyTangentMode(key, 1) != TangentMode.Smooth)
{
return;
}
curve.SmoothTangents(index, 0.0f);
}