private static AnimationCurve ExtractNormalizedTimeCurve(SceneCachePlayer scPlayer, out float duration)
{
ISceneCacheInfo sceneCacheInfo = scPlayer.ExtractSceneCacheInfo(forceOpen: true);
if (null == sceneCacheInfo)
{
duration = 0;
return(null);
}
TimeRange timeRange = sceneCacheInfo.GetTimeRange();
duration = timeRange.GetDuration();
if (duration <= 0f)
{
duration = Mathf.Epsilon;
}
Keyframe[] keyframes = sceneCacheInfo.GetTimeCurve().keys;
int numKeyframes = keyframes.Length;
for (int i = 0; i < numKeyframes; ++i)
{
keyframes[i].value /= timeRange.end;
}
//outTangent
for (int i = 0; i < numKeyframes - 1; ++i)
{
keyframes[i].outTangent = CalculateLinearTangent(keyframes, i, i + 1);
}
//inTangent
for (int i = 1; i < numKeyframes; ++i)
{
keyframes[i].inTangent = CalculateLinearTangent(keyframes, i - 1, i);
}
AnimationCurve curve = new AnimationCurve(keyframes);
return(curve);
}