TimeFrame()

Provides the appropriate frame based on time given (as duration).

The implementation of time is highly dependent on the language and environment, but any conventional method should do.

If better suited, this function can be re-implemented for engine runtimes.

function TimeFrame(
    time: Time, 
    animation: Animation, 
    reverse: bool, 
    isLoop: bool
): int {
    elapsed: float = time.asMillis() / 1e3
    frametime: float = 1.0 / animation.fps

    frame: int = (elapsed / frametime)
    frame = FormatFrame(frame, animation, reverse, isLoop)

    return frame
}