bvle-voxels

lythom/bvle-voxels

Fork 0

Commit graph

Author	SHA1	Message	Date
Samuel Bouchet	626fbaea80	Fix smooth Surface Nets rendering: eliminate faceting, fix blocky junction - Remove geoN (ddx/ddy) from smooth PS entirely — use smooth interpolated normal N for all triplanar sampling (albedo, heightmap, normal map). geoN changes discontinuously at triangle edges, causing per-triangle faceting in texture weights and normal perturbation. - Tune consistency-based vertex normal blend to smoothstep(0.70, 0.90): snaps to face normal at 90° boundaries (seamless blocky join) while preserving smooth normals on curved terrain. - Unify all 3 edge axes (X/Y/Z) to same smoothstep formula (was mixed smoothstep + pow4). - Remove grass-specific hardcoded shading from both PS (side darkening, warm shift, ambient boost) — will be data-driven per-material later. - Remove CPU SmoothMesher code (GPU-only path). - Document all findings in TROUBLESHOOTING.md with calibration table.	2026-04-01 20:35:42 +02:00
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

Author

SHA1

Message

Date

Samuel Bouchet

626fbaea80

Fix smooth Surface Nets rendering: eliminate faceting, fix blocky junction

- Remove geoN (ddx/ddy) from smooth PS entirely — use smooth interpolated
  normal N for all triplanar sampling (albedo, heightmap, normal map).
  geoN changes discontinuously at triangle edges, causing per-triangle
  faceting in texture weights and normal perturbation.
- Tune consistency-based vertex normal blend to smoothstep(0.70, 0.90):
  snaps to face normal at 90° boundaries (seamless blocky join) while
  preserving smooth normals on curved terrain.
- Unify all 3 edge axes (X/Y/Z) to same smoothstep formula (was mixed
  smoothstep + pow4).
- Remove grass-specific hardcoded shading from both PS (side darkening,
  warm shift, ambient boost) — will be data-driven per-material later.
- Remove CPU SmoothMesher code (GPU-only path).
- Document all findings in TROUBLESHOOTING.md with calibration table.

2026-04-01 20:35:42 +02:00

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

2 commits