Function rafPolyfill

engo_js.go:262–295

()

}

func rafPolyfill() {
	vendors := []string{"ms", "moz", "webkit", "o"}
	if window.Get("requestAnimationFrame").Type() == js.TypeUndefined {
		for i := 0; i < len(vendors) && window.Get("requestAnimationFrame").Type() == js.TypeUndefined; i++ {
			vendor := vendors[i]
			window.Set("requestAnimationFrame", window.Get(vendor+"RequestAnimationFrame"))
			window.Set("cancelAnimationFrame", window.Get(vendor+"CancelAnimationFrame"))
			if window.Get("cancelAnimationFrame").Type() == js.TypeUndefined {
				window.Set("cancelAnimationFrame", window.Get(vendor+"CancelRequestAnimationFrame"))
			}
		}
	}

	lastTime := 0.0
	if window.Get("requestAnimationFrame").Type() == js.TypeUndefined {
		window.Set("requestAnimationFrame", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
			currTime := js.Global().Get("Date").New().Call("getTime").Float()
			timeToCall := math.Max(0, 16-(currTime-lastTime))
			window.Call("setTimeout", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
				args[0].Invoke(currTime + timeToCall)
				return nil
			}), timeToCall)
			lastTime = currTime + timeToCall
			return nil
		}))
	}

	if window.Get("cancelAnimationFrame").Type() == js.TypeUndefined {
		window.Set("cancelAnimationFrame", js.FuncOf(func(this js.Value, args []js.Value) interface{} {
			js.Global().Get("clearTimeout").Invoke(args[0])
			return nil
		}))
	}
}

// RunIteration runs one iteration per frame
func RunIteration() {