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Correct texture projection issues, mainly in softgpu - #16117
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Matches PSP behavior, reusing last set values.
Unlike lighting, this does not use 0, 0, 1.
We don't use it, except w, at all in rasterization, so no need to keep it in the bin queue.
We'll need this to correctly project.
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Very interesting! Do we have an issue about the TOCA ground problem? Did it only affect software? I'll review this in a bit. |
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It only affected software. This frame dump: #16049 (comment) The hardware rendering tweaks here were all correctness changes, I'm not sure any game actually triggers them. -[Unknown] |
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This includes q in the interpolated stq to properly project coordinates, which wasn't being done before. Fixes the ground in TOCA (from a frame dump.)
Along the way, this also fixes texture projection with flat shading (outside GL/GLES), as well as what (0, 0, 0) normalizes to for the purposes of texture projection. These are probably very rare cases, though.
Did some other confirmations:
Tried to do this carefully so there's neutral impact to performance for the common cases.
See also hrydgard/pspautotests#226 (doesn't exactly pass these tests, due to some precision issues.)
-[Unknown]