36 lines
923 B
GLSL
36 lines
923 B
GLSL
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// Copyright 2020 Google LLC
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Texture2D textureColor : register(t1);
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SamplerState samplerColor : register(s1);
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struct VSOutput
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{
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[[vk::location(0)]] float2 UV : TEXCOORD0;
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[[vk::location(1)]] float LodBias : TEXCOORD3;
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[[vk::location(2)]] float3 Normal : NORMAL0;
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[[vk::location(3)]] float3 ViewVec : TEXCOORD1;
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[[vk::location(4)]] float3 LightVec : TEXCOORD2;
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};
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float4 main(VSOutput input) : SV_TARGET
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{
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float4 color = float4(0.0, 0.0, 0.0, 0.0);
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// Fetch sparse until we get a valid texel
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uint status;
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float minLod = input.LodBias;
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do
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{
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color = textureColor.SampleLevel(samplerColor, input.UV, minLod, 0, status);
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minLod += 1.0f;
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} while(!CheckAccessFullyMapped(status));
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float3 N = normalize(input.Normal);
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N = normalize((input.Normal - 0.5) * 2.0);
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float3 L = normalize(input.LightVec);
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float3 R = reflect(-L, N);
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float3 diffuse = max(dot(N, L), 0.25) * color.rgb;
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return float4(diffuse, 1.0);
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}
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