// returns a derived value interpolated from "prev" to "next" at "time".
static public object InterpolateKeyValue(SsKeyFrameInterface prevKey, SsKeyFrameInterface nextKey, int time)
{
// just returns a start value if prevKey has no curve.
if (prevKey.Curve.IsNone)
{
return(prevKey.ObjectValue);
}
// get times at nearest keys away from specified time.
int startTime = prevKey.Time;
int endTime = nextKey.Time;
float now = 0f;
if (startTime < endTime)
{
now = ((float)(time - startTime)) / (endTime - startTime);
}
SsInterpolatable interpolatable = prevKey.ObjectValue as SsInterpolatable;
if (interpolatable == null)
{
return(Interpolate(prevKey.Curve, now, prevKey.ObjectValue, nextKey.ObjectValue, startTime, endTime));
}
else
{
return((object)interpolatable.GetInterpolated(prevKey.Curve, now, (SsInterpolatable)prevKey.ObjectValue, (SsInterpolatable)nextKey.ObjectValue, startTime, endTime));
}
}
