`last_contributor` is not updated (to keep track of last range entry to update a pixel)

[almarouk]

diff-bbsplat-rasterization/cuda_rasterizer/stopthepop_2DGS/resorted_render.cuh

Line 119 in a751a33

uint32_t last_contributor = 0;

last_contributor is never updated

[david-svitov]

Indeed! I will look into it, thank you

[david-svitov]

In short, StopThePop sorting uses forward traversal during backpropagation. So there is no need to remember last_contributor, it can be removed to save memory, but it is easier to leave it for compatibility with the usual per-center sorting.