获取形状相交的中心（2D）
我正在使用 Slick java 游戏库，并且使用了 形状 作为碰撞的碰撞箱，效果很好。我使用 shape1.intersects(shape2) 来检查两个形状是否重叠。现在我想做的是获取相交形状的中心点，用作生成显示两个对象之间碰撞的粒子的位置。
我找不到任何计算形状交叉的算法的解释，也许是因为我不知道它是否有特定的名称。
I'm using the Slick java game lib and I've used the Slick implementation of Shape as a hit-box for collision and that's working fine. I use shape1.intersects(shape2) for checking if two shapes overlap. Now what I want to do is get the center point of the intersecting shape to use as a place to generate particles showing the collision between the 2 objects.
I can't find any explanations of algorithms that calculate shape intersections, maybe because I don't know if it has a specific name or not.
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查看文档，似乎有两种方法 -
union和subtract- 使用它们可以获得交集，如下所示：唯一的问题是这些方法似乎返回形状数组而不是单个形状，无论这意味着什么。
当然，实时执行此操作可能会非常昂贵，因此您也可以将碰撞点近似位于两个形状的边界框/圆的中心之间。
Looking at the documentation, there seem to be two methods --
unionandsubtract-- using which you can get the intersection as follows:The only problem is that those methods seem to return an array of shapes instead of a single shape, whatever that means.
Of course, doing this in real-time could be quite costly, so you could alternatively approximate the collision point to be in between the centres of the bounding box/circle of the two shapes.