376e66aeed
Restructure Sponza for the wavefront model: raygen emits the primary ray; closesthit (in SHADE) gathers albedo/normal, accumulates ambient, and emits a shadow ray carrying the pending direct term; miss adds the sky (primary) or the direct term (shadow miss). resolve.wgsl applies the same Reinhard+gamma the megakernel raygen did inline. User bindings moved to group 3 (groups 0..2 reserved). RTPass maxDepth=2. Renders the atrium correctly through the wavefront pipeline (textures, two-sided shading, sun+ambient, shadows, tonemap). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
12 lines
499 B
WebGPU Shading Language
12 lines
499 B
WebGPU Shading Language
// Sponza miss (runs in SHADE). Primary miss → two-stop sky gradient.
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// Shadow miss → the sun is unoccluded, so add the pending direct term.
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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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rtAccumulate((*payload).color);
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return;
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}
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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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rtAccumulate(mix(sky, zenith, t));
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}
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