factorize out a bunch of stuff, make the Spherical Rectangle Solid An…#1054

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devshgraphicsprogramming wants to merge 7 commits into

improve_spherical_rectangles

Commits on Apr 16, 2026

factorize out a bunch of stuff, make the Spherical Rectangle Solid Angle Sampler global like its Triangle counterpart, we need to keep the basis around
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epic optimization!
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Commits on Apr 17, 2026

`UsePdfAsWeight==false` implementation was 100% wrong
devshgraphicsprogramming
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why its always to use accessing methods than members directly in other code :P
devshgraphicsprogramming
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The Spherical Rectangle Shape needs to be created with the observer (local coordinate system) already given and fixed.
devshgraphicsprogramming
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Spherical Rectangle needs `generateInverse` implemented, otherwise PRactical Warps are broken wrong weight was getting returned and MIS weights were inconsistent.
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Update spherical_triangle.hlsl
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