 sunxfancy
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2f13169b68
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feat(virtualgeometry): add Nanite-style virtualized geometry rendering
Add a virtualgeometry module implementing a Nanite-inspired virtualized
geometry pipeline on the Vulkan backend:
- Cluster DAG preprocess (CPU): greedy meshletization + QEM edge-collapse
hierarchical LOD, with per-cluster bounding spheres and geometric error.
- GPU-driven culling (compute): frustum + screen-space-error LOD selection
that emits exactly one cluster per DAG branch (no gaps/overlaps).
- Software cluster rasterizer (compute): fills a visibility buffer
(packed depth<<16 | clusterId) via atomicMin.
- Visibility-buffer resolve (CPU readback + resolve shader reference).
- Module facade (VirtualGeometry / VirtualGeometryRenderer) reusing the
gpgpu compute backend; LodSelection CPU reference for tests.
- 14 unit tests (CPU preprocess + LOD-transition sweep + GPU end-to-end),
shader compile script, example, and design doc.
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2026-08-16 21:49:40 +08:00 |
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