CSM: Replace FrustumBoundingBox with Box3 #18755
Merged
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Aside from #18735 this is the last change to remove memory allocation in frequently called functions. This updates CSM to use Box3 instead of FrustumBoundingBox to cut down on redundancy and save on frequent allocation.
Temporary live link:
https://raw.githack.com/gkjohnson/three.js/csm-remove-frustumboundingbox/examples/webgl_shadowmap_csm.html
Next I will be looking into adding fade transitions between cascades.
@vhawk