getCurveType method
Implementation
double getCurveType(int frameIndex) {
final int index = frameIndex * CurveTimeline.bezierSize;
if (index == curves.length) return CurveTimeline.linear;
final double type = curves[index];
if (type == CurveTimeline.linear) return CurveTimeline.linear;
if (type == CurveTimeline.stepped) return CurveTimeline.stepped;
return CurveTimeline.bezier;
}