/// <summary>
/// Advance animation and return current animation step index.
/// </summary>
/// <param name="timeFactor">Time factor for animation playing speed.</param>
/// <returns>Current animation step index.</returns>
public int Update(float timeFactor)
{
// if finished, return last index and stop here
if (_isDone)
{
return(CurrentStep);
}
// advance current step
_timeForNextStep -= timeFactor * SpeedFactor;
// did we finish current step?
if (_timeForNextStep <= 0f)
{
// advance current animation step
CurrentStep++;
// did we finish animation clip?
if (CurrentStep > Clip.EndIndex)
{
// if its looping, just start over
if (Clip.IsLooping)
{
CurrentStep = Clip.StartIndex;
}
// if not looping, mark as done and return to last step to get "stuck" on
else
{
_isDone = true;
CurrentStep = Clip.EndIndex;
}
// invoke finish animation callback
OnAnimationEnd?.Invoke();
}
// get time until next step
_timeForNextStep = Clip.DelayForStep(CurrentStep - Clip.StartIndex);
}
// return current animation step
return(CurrentStep);
}
