Скачать или смотреть Meshlet Hi-Z Occlusion Culling

Added meshlet hi-z occlusion culling to my tiled software rasterizer (running on Teensy 4). In the video bunny model meshlets are culled as they are occluded by the coffee cup. The culling is done based on meshlet bounding spheres prior to rasterization and vertex transform, thus skipping all geometry processing for the culled meshlets. This is based purely on rasterized depth buffer and doesn't require any addtional occlusion setup like portals/antiportals.


Note also that some meshlets at the bottom of the cup interior are culled even though the meshlet triangles are camera facing. This is not because of the hi-z occlusion culling but because the visibility cone precalculation utilizes mesh occlusion.