57 lines
1.3 KiB
Plaintext
57 lines
1.3 KiB
Plaintext
import Common;
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interface IBRDF
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{
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float3 evaluate(float3x3 tbn, float3 viewDir_WS, float3 lightDir_WS, float3 lightColor);
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};
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struct BlinnPhong : IBRDF
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{
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float3 baseColor;
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float metallic;
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float3 normal;
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float specular;
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float roughness;
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float sheen;
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__init()
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{
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metallic = 0;
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normal = float3(0, 0, 1);
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specular = 0.5;
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roughness = 0.5;
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sheen = 1;
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}
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float3 evaluate(float3x3 tbn, float3 viewDir_TS, float3 lightDir_TS, float3 lightColor)
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{
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float3 normal_TS = normalize(normal);
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float diffuse = max(dot(normal_TS, lightDir_TS), 0);
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float3 h = normalize(lightDir_TS + viewDir_TS);
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float specular = saturate(dot(normal_TS, h));
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return baseColor * (diffuse + specular) * lightColor;
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}
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};
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struct DisneyBRDF : IBRDF
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{
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float3 baseColor;
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float metallic = 0;
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float3 normal = float3(0, 1, 0);
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float subsurface = 0;
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float specular = 0.5;
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float roughness = 0.5;
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float specularTint = 0;
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float anisotropic = 0;
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float sheen = 0;
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float sheenTint = 0.5f;
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float clearCoat = 0;
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float clearCoatGloss = 1;
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float3 evaluate(float3x3 tbn, float3 viewDir_TS, float3 lightDir_TS, float3 lightColor)
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{
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return baseColor;
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}
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};
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