function check_hitstop()
{
	if global.hitstop > 0
	{
		return true;
	}
	else
	{
		return false;
	}
}
/// @desc 优雅地检测该实例的sprite当前动画是否到达最后一帧
function animation_end()
{
	if animation_spd == 0
		return false;
    return (image_index + animation_spd >= image_number);
}
/// @desc 优雅地将该实例的sprite替换为给定值，并将sprite_index归零
/// @param {Asset.GMSprite} _sprite 将要替换为的sprite
function set_sprite(_sprite)
{
	if sprite_index != _sprite
	{
        sprite_index = _sprite;
        image_index = 0;
    }
}

function camera_snap()
{
	oCamera.x = oCamera.x_to;
	oCamera.y = oCamera.y_to;	
}