DaviesLeigh

TestRect would be the preferred way. An example of using this function is given in the companion sample https://github.com/GameTechDev/OcclusionCulling in the file https://github.com/GameTechDev/OcclusionCulling/blob/master/TransformedAABBoxAVX.cpp, look for function TransformAndPreTestAABBox line 165.