080ac92fbb
fix(renderer): merge IBL into group(3) to stay within max_bind_groups limit of 4
...
wgpu's default max_bind_groups is 4 (groups 0-3), but the PBR shader was
using group(4) for BRDF LUT bindings. This merges IBL bindings into the
shadow bind group (group 3) at binding slots 3-4, removes the standalone
IBL bind group layout/creation, and updates all examples accordingly.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com >
2026-03-24 21:38:45 +09:00
5232552aa4
feat(renderer): add normal mapping and procedural IBL to PBR shader
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- Add tangent input (location 3) and TBN computation in vertex shader
- Add normal map sampling (group 1, bindings 2-3) for tangent-space normal mapping
- Add BRDF LUT binding (group 4, bindings 0-1) for specular IBL
- Add procedural sky environment function for diffuse/specular IBL
- Replace flat ambient with split-sum IBL approximation
- Add pbr_texture_bind_group_layout (4 entries: albedo + normal)
- Add create_pbr_texture_bind_group helper and flat_normal_1x1 texture
- Update create_pbr_pipeline to accept ibl_layout parameter (group 4)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com >
2026-03-24 21:28:32 +09:00
8f962368e9
feat(renderer): integrate shadow map sampling with 3x3 PCF into PBR shader
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Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com >
2026-03-24 21:03:31 +09:00
b09e1df878
feat(renderer): add PBR material, sphere generator, Cook-Torrance shader, and PBR pipeline
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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com >
2026-03-24 20:41:02 +09:00
