[spine-cpp] SkeletonBounds intersects an other SkeletonBounds

[Niolak]

Hello,

I would need to test if 2 SkeletonBounds intersect and get their respective bounds in contact. Currently, I do not see any way of doing this. I think one of the following should be done to make it possible, in order of what seems best to me:

• add a Vector<Polygon>* getPolygons() to SkeletonBounds and a BoundingBoxAttachment *getBoundingBox(Polygon *polygon);,
• make the _polygons and _boundingBoxes protected so we can inherit SkeletonBounds to add some methods,
• add directly some features, but probably more time consuming and too specific to each need, what I would need is something like std::pair<std::vector<BoundingBoxAttachment*>,std::vector<BoundingBoxAttachment*>> intersects(SkeletonBounds* other); returning all bounding boxes of both the skeletonBounds (this and other).

In the meantime, I'll use a custom version implementing the first solution but I think it could be useful to others.

[badlogic]

Solution 1 makes the most sense to me. While solution 2 would work just as well, it's a tiny hit cleaner to expose things via getters. We try to not rely on STL for various reasons, so solution 3 is not workable.

I'll add this tomorrow to the 4.1 and 4.2-beta branches.

[badlogic]

This is now implemented in the latest commit on the 4.1 and 4.2-beta branches.

[Niolak]

Thanks!