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example(RTVolume): GPU-written device-buffer procedural AABBs (#37)

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A compute shader (aabbs.comp.{glsl,wgsl}) writes the procedural box into a
device buffer that BuildProcedural consumes by device address/handle with no
host copy; the WebGPU path also refits from it each frame so the box breathes.
Verified rendering on both Vulkan (native) and WebGPU (browser).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
catbot 2026-06-16 14:12:12 +00:00
commit 0d1312ac09
4 changed files with 173 additions and 13 deletions
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6
examples/RTVolume/project.cpp
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@ -42,6 +42,9 @@ extern "C" Configuration CrafterBuildProject(std::span<const std::string_view> a
cfg.files.emplace_back(fs::path("closesthit.wgsl"));
cfg.files.emplace_back(fs::path("miss.wgsl"));
cfg.files.emplace_back(fs::path("resolve.wgsl"));
// GPU producer for the AABB build input (issue #37): writes the
// procedural boxes into a device buffer fed straight to BuildProcedural.
cfg.files.emplace_back(fs::path("aabbs.comp.wgsl"));
EnableWasiBrowserRuntime(cfg);
} else {
cfg.shaders.emplace_back(fs::path("raygen.glsl"), std::string("main"), ShaderType::RayGen);
@ -49,6 +52,9 @@ extern "C" Configuration CrafterBuildProject(std::span<const std::string_view> a
cfg.shaders.emplace_back(fs::path("closesthit.glsl"), std::string("main"), ShaderType::ClosestHit);
cfg.shaders.emplace_back(fs::path("anyhit.glsl"), std::string("main"), ShaderType::AnyHit);
cfg.shaders.emplace_back(fs::path("intersection.glsl"), std::string("main"), ShaderType::Intersect);
// GPU producer for the AABB build input (issue #37): writes the
// procedural boxes into a device buffer fed straight to BuildProcedural.
cfg.shaders.emplace_back(fs::path("aabbs.comp.glsl"), std::string("main"), ShaderType::Compute);
}
return cfg;
}