func StartOfFrame() {
	time := glfw.GetTime()
	previousElapsed = time - previousTime
	previousTime = time
}
// StartOfFrame is expected to be called at the same point in every frame to work properly.
StartOfFrame is expected to be called at the same point in every frame to work properly.
// StartOfFrame is expected to be called at the same point in every frame to work properly .
func StartOfFrame() {
	time := glfw.GetTime()
	previousElapsed = time - previousTime
	previousTime = time
}
func StartOfFrame ( ) { time := glfw . GetTime ( ) previousElapsed = time - previousTime previousTime = time }
StartOfFrame is expected to be called at the same point in every frame to work properly.
StartOfFrame is expected to be called at the same point in every frame to work properly .