Robert Swain c2a9d5843d Faster assign lights to clusters (#4345) ... # Objective - Fixes #4234 - Fixes #4473 - Built on top of #3989 - Improve performance of `assign_lights_to_clusters` ## Solution - Remove the OBB-based cluster light assignment algorithm and calculation of view space AABBs - Implement the 'iterative sphere refinement' algorithm used in Just Cause 3 by Emil Persson as documented in the Siggraph 2015 Practical Clustered Shading talk by Persson, on pages 42-44 http://newq.net/dl/pub/s2015_practical.pdf - Adapt to also support orthographic projections - Add `many_lights -- orthographic` for testing many lights using an orthographic projection ## Results - `assign_lights_to_clusters` in `many_lights` before this PR on an M1 Max over 1500 frames had a median execution time of 1.71ms. With this PR it is 1.51ms, a reduction of 0.2ms or 11.7% for this system. --- ## Changelog - Changed: Improved cluster light assignment performance Co-authored-by: robtfm <50659922+robtfm@users.noreply.github.com> Co-authored-by: Carter Anderson <mcanders1@gmail.com>		2022-04-15 02:53:20 +00:00
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bevymark.rs	Group stress test examples (#4289)	2022-04-10 02:05:21 +00:00
many_cubes.rs	Group stress test examples (#4289)	2022-04-10 02:05:21 +00:00
many_lights.rs	Faster assign lights to clusters (#4345)	2022-04-15 02:53:20 +00:00
many_sprites.rs	Group stress test examples (#4289)	2022-04-10 02:05:21 +00:00
transform_hierarchy.rs	Add transform hierarchy stress test (#4170)	2022-03-21 20:36:46 +00:00