Flame 滚动精灵
Flame Scrolling Sprite 是一个 Flame 包，可轻松渲染滚动并根据速度永远重复的精灵。
这可以用来创建像滚动背景这样的东西，甚至可以创建场景，下面你可以看到一个例子
可以通过纯类ScrollingSprite或ScrollingSpriteComponent来使用此包，它们实际上做同样的事情，但后者可以与Flame组件系统一起使用。
下面你可以找到类接收的所有参数
//// Resource path of the sprite
@required String spritePath,
//// X and Y coordinate do be used to map the sprite
double spriteX = 0.0,
double spriteY = 0.0,
//// Width and height of the mapped sprite
double spriteWidth,
double spriteHeight,
//// Destination width and height of the sprite, in case you want to scale its original size
double spriteDestWidth,
double spriteDestHeight,
//// Width and height of the total area where the sprites will scroll
double width,
double height,
//// Vertical and horizontal speed of the scrolling speed in pixels per second
this.verticalSpeed = 0.0,
this.horizontalSpeed = 0.0,
//// Since the sprites are scrolling on an endless manner, the sprite can be draw outside of its
//// area, by default, the package already clips the area to prevent it from showing, use this flag to change
//// this behaviour
this.clipToDimensions = true,
在使用ScrollingSpriteComponent时，上面的相同参数也适用于它，此外，你还可以告知x和y区域将放置的位置。
有关此运行的实时示例，请参阅 示例 文件夹。
