private void FrameCallback(TimeSpan dur)
{
setState(() =>
{
Offset moveEndVelocityChangeSpeed = Offset.zero;
Offset offsetChangeSpeed = Offset.zero;
float scaleChangeSpeed = 0;
MoveEndVelocity = MoveEndVelocity.DampTo(Offset.zero, ref moveEndVelocityChangeSpeed, 0.3f);
aimedOffset += MoveEndVelocity / (1000.0f / (dur - previousTime).Milliseconds);
postCheck();
Offset = Offset.DampTo(aimedOffset, ref offsetChangeSpeed, 0.3f);
Scale = Mathf.SmoothDamp(Scale, aimedScale, ref scaleChangeSpeed, 0.3f);
previousTime = dur;
});
WidgetsBinding.instance.scheduleFrameCallback(FrameCallback);
}