strips/voxelotl-engine
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initial lighting

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a dinosaur
2024-08-18 01:10:25 +10:00
parent 55d47a2d2f
commit f7255c473c
3 changed files with 26 additions and 10 deletions
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16
Sources/Voxelotl/shader.metal
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@ -4,7 +4,7 @@
struct FragmentInput {
float4 position [[position]];
float4 normal;
float3 normal;
float2 texCoord;
half4 color;
};
@ -23,16 +23,24 @@ vertex FragmentInput vertexMain(
FragmentInput out;
out.position = ndc;
out.color = half4(i[instanceID].color) / 255.0;
out.normal = vtx[vertexID].normal;
out.normal = (i[instanceID].normalModel * vtx[vertexID].normal).xyz;
out.texCoord = vtx[vertexID].texCoord;
return out;
}
fragment half4 fragmentMain(
FragmentInput in [[stage_in]],
metal::texture2d<half, metal::access::sample> texture [[texture(0)]]
metal::texture2d<half, metal::access::sample> texture [[texture(0)]],
constant ShaderUniforms& u [[buffer(ShaderInputIdxUniforms)]]
) {
constexpr metal::sampler sampler(metal::address::repeat, metal::filter::nearest);
auto normal = metal::normalize(in.normal);
float lambert = metal::dot(normal, -u.directionalLight);
float diffuse = metal::max(0.0, lambert);
half4 albedo = texture.sample(sampler, in.texCoord);
return albedo * in.color;
albedo *= in.color;
return albedo * diffuse;
}