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Use FP classify here

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This commit is contained in:
NepDisk 2026-05-03 13:35:37 -04:00
parent 9f52b1e158
commit 137ffd14cf
1 changed files with 1 additions and 4 deletions
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5
src/hardware/hw_draw.c
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@ -294,10 +294,7 @@ void HWR_DrawAffinePatch(patch_t *gpatch, fixed_t x, fixed_t y, const affine_t *
// i don't fucking know, i spent a day on this and got absolutely nowhere, but this guy knows:
// https://nigeltao.github.io/blog/2021/inverting-3x2-affine-transformation-matrix.html
float determinant = fa * fd - fb * fc;
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wfloat-equal"
if (determinant == 0.0f)
#pragma GCC diagnostic pop
if (fpclassify(determinant) == FP_ZERO)
return;
float ba = fd / determinant;
float bb = -fb / determinant;