3 commits

Author	SHA1	Message	Date
Samuel Bouchet	d7e69f97ca	Phase 3: PS-based texture blending with winner-takes-all heightmap ... Replace pre-encoded quad blend data (v1) with per-pixel voxel data lookups in the pixel shader. The PS reads voxelDataBuffer (SRV t3) to find neighbor materials dynamically, enabling 2 independent blend axes, stair-priority neighbor detection, and winner-takes-all heightmap-driven transitions. Key design decisions validated through 6 iterations (see blending_experiments.md): - Winner-takes-all: material with highest heightmap score wins 100% (sharp but organic transitions, not smooth gradient) - Symmetric bias: bias = 0.5 - weight ensures equal chance at border - Subtractive corner attenuation (param=0.80): xAdj = xEdge - saturate(yEdge - 0.80) reduces blend at corners naturally - Blend zone = 0.25 voxels from each edge (50% of face) - Debug mode (F4) visualizes blend zones as colors	2026-03-26 12:14:08 +01:00
Samuel Bouchet	21f1bd1a12	Phase 2.5: GPU meshing production pipeline + perf optimizations (80+ FPS) ... Replace CPU greedy mesher with GPU compute mesher as default rendering pipeline. Key optimizations identified via CPU profiling (ProfileAccum, 5s averages): - Fused regenerate+pack: parallel noise gen + memcpy in same jobsystem pass (6ms → 0ms) - VoxelData memcpy: sizeof(VoxelData)==2 enables direct memcpy instead of bit-shift loop (28ms → <1ms) - Dirty-skip: GPU dispatch/upload only when chunks change, not every frame - Animation: 2 fBm octaves + no caves in animation mode (54ms → 8ms) - Result: 80-110 FPS with 60Hz terrain animation, 700+ FPS static	2026-03-26 09:05:52 +01:00
Samuel Bouchet	5f346bb14a	Phase 2: GPU-driven voxel rendering pipeline ... Mega-buffer architecture replacing per-chunk GPU buffers: - Single StructuredBuffer<PackedQuad> for all chunks (2M quads, 16 MB) - StructuredBuffer<GPUChunkInfo> with per-chunk metadata (position, quad offsets, face groups) - VS reads chunk info via push constants (b999) for driver-safe chunk indexing - CPU frustum culling with wi::primitive::Frustum + AABB per chunk - Quads sorted by face direction in greedy mesher (faceOffsets/faceCounts) - GPU frustum + backface cull compute shader (voxelCullCS.hlsl) - GPU binary mesher compute shader baseline (voxelMeshCS.hlsl) - Indirect draw buffers and timestamp query infrastructure - README with build instructions and project architecture	2026-03-25 14:24:05 +01:00