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when there is no uv, we call the function `map_to_sphere()` to create temporary uv for computing the tangent. It could happen that a triangle has vertices with the u coordinates going across the line where u wraps from 1 to 0. In this case, just computing the difference of the u coordinates results in the wrong triangle area. To fix this problem, we compute distance in toroidal (wrap around) space. This is safe for coordinates generated by `map_to_sphere()` function, because it is not supposed to map the positions of a triangle to u coordinates that span larger than 0.5. Pull Request: https://projects.blender.org/blender/blender/pulls/139880
This folder contains files used by ctest testing system in Blender. The purpose of this files it to do automated render tests for Cycles, Workbench and EEVEE. If you want to extend this collection make sure the file is really small and uses as few samples as possible for reliable detection of render regressions. Each file is expected to be rendered in around one second.