8df8b043ad
* shaderexp: first commit * shaderexp: further improve error handling * shaderexp: attribute ray_marching example Signed-off-by: Stephen Gutekanst <stephen@hexops.com> Co-authored-by: Stephen Gutekanst <stephen@hexops.com>
40 lines
1.4 KiB
WebGPU Shading Language
Executable file
40 lines
1.4 KiB
WebGPU Shading Language
Executable file
struct UniformBufferObject {
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resolution: vec2<f32>,
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time: f32,
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}
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@group(0) @binding(0) var<uniform> ubo : UniformBufferObject;
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@stage(fragment) fn main(
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@location(0) uv : vec2<f32>
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) -> @location(0) vec4<f32> {
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let aspect = ubo.resolution.xy / ubo.resolution.y;
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let translated_uv = (uv - vec2<f32>(0.5,0.5)) * 2.0 * aspect;
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let freq:f32 = 5.0;
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let speed: f32 = 5.0;
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let h = (sin(freq * length(translated_uv) + speed * ubo.time) + 1.0) / 2.0;
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let h_off = 20.0;
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return vec4<f32>(hsl_to_rgb(h * (360.0 - h_off * 2.0) + h_off ,0.7,0.5),1.0);
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}
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// 0 ≤ H < 360, 0 ≤ S ≤ 1 and 0 ≤ L ≤ 1
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fn hsl_to_rgb(h:f32,s:f32,l:f32) -> vec3<f32> {
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let tmp_h = h % 360.0;
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let c = (1.0 - abs(2.0 * l - 1.0)) * s;
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let x = c * (1.0 - abs((tmp_h / 60.0) % 2.0 - 1.0));
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let m = l - c / 2.0;
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let case_1 = vec3<f32>(c ,x ,0.0);
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let case_2 = vec3<f32>(x ,c ,0.0);
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let case_3 = vec3<f32>(0.0,c ,x);
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let case_4 = vec3<f32>(0.0,x ,c);
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let case_5 = vec3<f32>(x ,0.0,c);
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let case_6 = vec3<f32>(c ,0.0,x);
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return case_1 * f32(tmp_h < 60.0 && tmp_h >= 0.0) +
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case_2 * f32(tmp_h < 120.0 && tmp_h >= 60.0) +
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case_3 * f32(tmp_h < 180.0 && tmp_h >= 120.0) +
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case_4 * f32(tmp_h < 240.0 && tmp_h >= 180.0) +
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case_5 * f32(tmp_h < 300.0 && tmp_h >= 240.0) +
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case_6 * f32(tmp_h < 360.0 && tmp_h >= 300.0) + vec3<f32>(m);
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}
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