/**
* 将触摸屏幕的点转换为当前视图下的坐标
*
* @param touch
*/
public void touchToWorld(Vector2f touch) {
touch.x = (touch.x / glGraphics.getWidth()) * FrumWidth * zoom;
touch.y = (touch.y / glGraphics.getHeight()) * FrumHeigh * zoom;
// 在当前坐标系下的坐标
touch.add(postion).sub(FrumWidth * zoom / 2, FrumHeigh * zoom / 2);
}
