Samuel Bouchet
bc29a02c35
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.
42 lines
1.6 KiB
HLSL
42 lines
1.6 KiB
HLSL
// BVLE Voxels - Toping Pixel Shader (Phase 4.2)
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// Simplified version of voxelPS: triplanar texture sampling + basic lighting.
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// No height-based blending (topings are small decorative meshes).
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#include "voxelCommon.hlsli"
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Texture2DArray<float4> materialTextures : register(t1);
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SamplerState texSampler : register(s0);
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struct PSInput {
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float4 position : SV_POSITION;
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float3 worldPos : WORLDPOS;
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float3 normal : NORMAL;
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nointerpolation uint materialID : MATERIALID;
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};
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[RootSignature(VOXEL_ROOTSIG)]
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float4 main(PSInput input) : SV_TARGET0 {
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float3 N = normalize(input.normal);
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float tiling = textureTiling;
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// Material texture index (materialID 1-5 → array layer 0-4)
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uint texIdx = clamp(input.materialID - 1u, 0u, 4u);
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// Triplanar sampling (same as voxel PS)
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float3 blend = abs(N);
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blend = blend / (blend.x + blend.y + blend.z + 0.001);
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float4 xSample = materialTextures.Sample(texSampler, float3(input.worldPos.yz * tiling, (float)texIdx));
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float4 ySample = materialTextures.Sample(texSampler, float3(input.worldPos.xz * tiling, (float)texIdx));
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float4 zSample = materialTextures.Sample(texSampler, float3(input.worldPos.xy * tiling, (float)texIdx));
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float3 texColor = (xSample.rgb * blend.x + ySample.rgb * blend.y + zSample.rgb * blend.z);
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// Basic directional lighting + ambient
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float3 L = normalize(-sunDirection.xyz);
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float NdotL = max(dot(N, L), 0.0);
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float3 ambient = float3(0.15, 0.18, 0.25);
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float3 lit = texColor * (sunColor.rgb * NdotL + ambient);
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return float4(lit, 1.0);
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}
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