Plays the given animation by name if it exists with an optional start time (Default 0), optional looping, and optional tween time (Default 0). The tween time will smoothly interpolate the skeleton from its current state to the first frame of the specified animation before it starts animating so that there is no sharp transition. A loop value of 1 will loop forever, a loop value greater than 1 will loop for that many times and then stop, and a loop value of 0 will play the animation once and then stop
PlaySkeleton2DAnimation( iSkeleton, anim, starttime, loop, tweentime )