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examples: import mach-examples@20ceb359231ff284cf343dddba8cf25112ffe717

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Helps hexops/mach#1165

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2024-03-06 11:08:19 -07:00
parent f25f435275
commit 0a8e22bb49
19 changed files with 3147 additions and 0 deletions
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40
examples/gkurve/vert.wgsl Normal file
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struct VertexUniform {
matrix: mat4x4<f32>,
}
@binding(0) @group(0) var<uniform> ubo: VertexUniform;
struct VertexOut {
@builtin(position) position_clip: vec4<f32>,
@location(0) frag_uv: vec2<f32>,
@interpolate(linear) @location(1) frag_bary: vec2<f32>,
@interpolate(flat) @location(2) triangle_index: u32,
}
@vertex fn main(
@builtin(vertex_index) vertex_index: u32,
@location(0) position: vec4<f32>,
@location(1) uv: vec2<f32>,
) -> VertexOut {
var output : VertexOut;
output.position_clip = ubo.matrix * position;
output.frag_uv = uv;
// Generates [0.0, 0.0], [0.5, 0.0], [1.0, 1.0]
//
// Equal to:
//
// if ((vertex_index+1u) % 3u == 0u) {
// output.frag_bary = vec2<f32>(0.0, 0.0);
// } else if ((vertex_index+1u) % 3u == 1u) {
// output.frag_bary = vec2<f32>(0.5, 0.0);
// } else {
// output.frag_bary = vec2<f32>(1.0, 1.0);
// }
//
output.frag_bary = vec2<f32>(
f32((vertex_index+1u) % 3u) * 0.5,
1.0 - f32((((vertex_index + 3u) % 3u) + 1u) % 2u),
);
output.triangle_index = vertex_index / 3u;
return output;
}