36 lines
1.1 KiB
GLSL
36 lines
1.1 KiB
GLSL
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float AMBIENT = 0.2;
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uniform vec3 color;
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uniform float metalness;
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uniform float roughness;
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uniform vec3 lightPos;
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uniform vec3 lightColor;
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in vec3 viewDirTS;
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in vec3 lightDirTS;
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in vec3 worldPos;
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out vec4 outColor;
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in mat3 TBN;
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void main()
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{
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vec3 normal = normalize(TBN * vec3(0, 0, 1)); // Normal z TBN
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vec3 L = normalize(lightPos - worldPos);
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vec3 V = normalize(viewDirTS);
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vec3 H = normalize(L + V);
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float k = pow((roughness + 1), 2.0) / 8.0;
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float D = (roughness * roughness) / (3.14159 * pow(pow(dot(normal, H), 2.0) * (roughness * roughness - 1.0) + 1.0, 2.0));
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float G = dot(normal, L) / (dot(normal, L) * (1.0 - k) + k);
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vec3 F0 = mix(vec3(0.04), color, metalness);
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vec3 F = F0 + (1.0 - F0) * pow(1 - dot(V, H), 5.0);
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vec3 specular = lightColor * (D * G * F) / (4 * dot(normal, L) * dot(normal, V) + 0.00001);
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vec3 kD = vec3(1.0) - F;
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vec3 diffuse = lightColor * kD * (color / 3.1458493);
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vec3 finalColor = (diffuse + specular) * min(1.0, AMBIENT + max(dot(normal, L), 0.0));
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outColor = vec4(finalColor, 1.0);
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}
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