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examples/gkurve: fix bug in barycentric coordinates

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2022-05-21 12:14:05 -07:00
parent 2b718c6de1
commit 2d4d856e55
1 changed files with 3 additions and 3 deletions
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6
examples/gkurve/vert.wgsl
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@ -19,7 +19,7 @@ struct VertexOut {
output.position_clip = ubo.matrix * position;
output.frag_uv = uv;
// Generates [0, 0], [0.5, 0.0], [1.0, 1.0]
// Generates [0.0, 0.0], [0.5, 0.0], [1.0, 1.0]
//
// Equal to:
//
@ -32,8 +32,8 @@ struct VertexOut {
// }
//
output.frag_bary = vec2<f32>(
f32(((vertex_index+2u) % 3u * 2u) % 3u),
f32(((vertex_index+2u) % 3u * 2u) & 2u) * 2.0,
f32((vertex_index+1u) % 3u) * 0.5,
1.0 - f32((((vertex_index + 3u) % 3u) + 1u) % 2u),
);
output.triangle_index = vertex_index / 3u;
return output;