48 lines
1.4 KiB
GLSL
48 lines
1.4 KiB
GLSL
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// Copyright 2020 Google LLC
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Texture2D tex : register(t1);
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SamplerState samp : 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)]] float3 Normal : NORMAL0;
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[[vk::location(2)]] float3 Color : COLOR0;
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[[vk::location(3)]] float3 EyePos : POSITION0;
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[[vk::location(4)]] float3 LightVec : TEXCOORD2;
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};
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float specpart(float3 L, float3 N, float3 H)
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{
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if (dot(N, L) > 0.0)
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{
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return pow(clamp(dot(H, N), 0.0, 1.0), 64.0);
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}
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return 0.0;
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}
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float4 main(VSOutput input) : SV_TARGET
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{
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float3 Eye = normalize(-input.EyePos);
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float3 Reflected = normalize(reflect(-input.LightVec, input.Normal));
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float3 halfVec = normalize(input.LightVec + input.EyePos);
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float diff = clamp(dot(input.LightVec, input.Normal), 0.0, 1.0);
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float spec = specpart(input.LightVec, input.Normal, halfVec);
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float intensity = 0.1 + diff + spec;
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float4 IAmbient = float4(0.2, 0.2, 0.2, 1.0);
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float4 IDiffuse = float4(0.5, 0.5, 0.5, 0.5) * max(dot(input.Normal, input.LightVec), 0.0);
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float shininess = 0.75;
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float4 ISpecular = float4(0.5, 0.5, 0.5, 1.0) * pow(max(dot(Reflected, Eye), 0.0), 2.0) * shininess;
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float4 outFragColor = float4((IAmbient + IDiffuse) * float4(input.Color, 1.0) + ISpecular);
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// Some manual saturation
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if (intensity > 0.95)
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outFragColor *= 2.25;
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if (intensity < 0.15)
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outFragColor = float4(0.1, 0.1, 0.1, 0.1);
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return outFragColor;
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}
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