Feature request: TestSphere

[fstrugar]

Bounding sphere visibility test.

[brunntho]

you can compute a bounding rect from a sphere.

https://research.nvidia.com/publication/2d-polyhedral-bounds-clipped-perspective-projected-3d-sphere

[fstrugar]

That is an excellent article, thank you! With the bounding rect there would be some amount of false negatives for culling as it doesn't fit tightly, but if that is a problem one can use a bounding polygon with more sides and test using already available MaskedOcclusionCulling::TestTriangles.
I'll leave this open in case anyone wants to write an implementation based on the Nvidia paper!