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Fix even-odd rule

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This works with winding numbers even larger than 2.
This commit is contained in:
Raph Levien 2023-01-12 21:07:29 -08:00
parent a9aa3f9cab
commit 5c469013c7
1 changed files with 2 additions and 2 deletions
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4
shader/fine.wgsl
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@ -139,8 +139,8 @@ fn fill_path(tile: Tile, xy: vec2<f32>, even_odd: bool) -> array<f32, PIXELS_PER
if even_odd {
// even-odd winding rule
for (var i = 0u; i < PIXELS_PER_THREAD; i += 1u) {
let a = abs(area[i]);
area[i] = select(a, 2.0 - min(a, 2.0), a > 1.0);
let a = area[i];
area[i] = abs(a - 2.0 * round(0.5 * a));
}
} else {
// non-zero winding rule