16 lines
720 B
WebGPU Shading Language
16 lines
720 B
WebGPU Shading Language
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fn miss_main(ray: RayDesc, payload: ptr<function, Payload>) {
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if ((*payload).shadowRay == 1u) {
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// Shadow ray escaped to infinity — the sun is visible from the
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// origin, so the surface there should pick up full direct light.
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// raygen reads color.x as the visibility coefficient.
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(*payload).color = vec3<f32>(1.0);
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return;
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}
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// Primary miss: cheap two-stop sky gradient. (*payload).hit stays 0
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// so raygen knows to skip the lighting path and just use this color.
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let t = clamp(ray.direction.y * 0.5 + 0.5, 0.0, 1.0);
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let sky = vec3<f32>(0.45, 0.65, 0.95);
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let zenith = vec3<f32>(0.95, 0.85, 0.65);
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(*payload).color = mix(sky, zenith, t);
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}
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