4 commits

Author	SHA1	Message	Date
Samuel Bouchet	cd9814e494	Phase 5.2-5.3: CPU perf optimizations + GPU compute Surface Nets ... CPU smooth mesher optimizations (560ms → 17ms): - VoxelData grid cache eliminates redundant readVoxel calls - Pre-cached 27 neighbor chunk pointers (readVoxelFast) - smoothNear dilation (8 lookups/cell instead of 56) - Early exit via containsSmooth flag on chunks - Thread-local scratch buffers (SmoothScratch ~600KB) - wi::jobsystem parallelization across all cores - Persistent staging vectors for upload TopingSystem optimizations (58ms → 6ms): - collectInstancesParallel() with per-chunk local vectors - Neighbor chunk pointer caching GPU compute Surface Nets (Phase 5.3): - Two-pass compute shader: centroid grid + emit with smooth normals - Pass 1 (voxelSmoothCentroidCS): computes centroids + solid flags for cells [-1..32], cross-chunk neighbor voxel reading - Pass 2 (voxelSmoothCS): reads ONLY from centroid grid, computes area-weighted smooth normals from 12 incident edges per vertex - Batched dispatch: all centroid passes then all emit passes with single UAV→SRV barrier (instead of 2 barriers per chunk) - Smooth chunk filtering: only dispatches chunks with containsSmooth - Centroid grid buffer dynamically sized per smooth chunk count - 1-frame readback delay with auto-redispatch on first frame	2026-03-27 22:30:43 +01:00
Samuel Bouchet	ef89bd8c49	Phase 4.2: grass blade tufts, stone corner fills/caps, vegetation shading ... Stone: add corner fill triangles at adjacent open edges and cap triangles at strip terminaisons. Grass: replace bevel strips with tuft-based grass blades — clusters of 3-9 curved double-sided blades with per-tuft height/lean personality and hash-driven placement (quadratic inset 0-0.30 from edge). Vegetation PS uses half-Lambert wrap lighting + translucency for soft stylized shading (inspired by Airborn Trees). Stone keeps classic Lambert.	2026-03-26 18:48:35 +01:00
Samuel Bouchet	bc29a02c35	Phase 4.2: GPU toping rendering pipeline + winding/lighting fixes ... Add instanced rendering for toping bevels: dedicated shaders (voxelTopingVS/PS), PSO, GPU buffers (t4 vertices, t5 instances), per-group DrawInstanced in a separate render pass with LoadOp::LOAD. Fix inverted face winding (emitTri auto-winding condition flipped for CW front-facing), slope normals (use inward direction not outward), and PS lighting (negate sunDirection like voxelPS). Update CLAUDE.md with Phase 4.1/4.2 documentation.	2026-03-26 17:47:08 +01:00
Samuel Bouchet	9e777d653b	Phase 4.1: TopingSystem infrastructure + procedural mesh generation ... - TopingSystem with TopingDef registry, procedural mesh gen, instance collection - 2 toping types: stone bevel (h=0.06, smooth) + grass edge (h=0.12, bumpy) - 16 mesh variants per type indexed by 4-bit adjacency bitmask (~6 unique with symmetry) - Wedge cross-section: outer wall + sloped top, grass has sinusoidal height profile - Instance collection scans exposed +Y faces, checks same-material neighbors - Cross-chunk adjacency via VoxelWorld::getVoxel() - Integrated into VoxelRenderPath: init at Start(), stats in HUD - ~191K instances, 1920 mesh vertices for 170 chunks (validated) - Research doc (research_connected_meshes.md) + plan (plan_phase4.md)	2026-03-26 15:27:15 +01:00