70 lines
1.5 KiB
GLSL
70 lines
1.5 KiB
GLSL
#version 430 core
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float AMBIENT = 0.6;
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float roughness;
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float metalic;
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uniform vec3 color;
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uniform sampler2D colorTexture;
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uniform sampler2D normalSampler;
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uniform sampler2D metalnessTexture;
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uniform sampler2D roughnessTexture;
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in vec3 worldPos;
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in vec2 vecTex;
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in vec3 viewDirTS;
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in vec3 lightDirTS;
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out vec4 outColor;
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void main()
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{
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vec3 normal = vec3(0,0,1);
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vec3 L = (lightDirTS);
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vec3 V = (viewDirTS);
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vec3 textureColor = texture2D(colorTexture, vecTex).xyz;
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float metalnessValue = texture2D(metalnessTexture, vecTex).r;
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float roughnessValue = texture2D(roughnessTexture, vecTex).r;
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roughness =roughnessValue;
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metalic = metalnessValue;
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vec3 N = texture2D(normalSampler, vecTex).xyz;
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N = 2.0 * N - 1.0;
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N = normalize(N);
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vec3 H = normalize(L + V);
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float NdotH = max(0.0, dot(N, H));
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float NdotL = max(dot(N, L),0.0000001 );
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float NdotV = max(0.0, dot(N, V));
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float VdotH = max(0.00001, dot(V, H));
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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(NdotH * NdotH,2.0) * (roughness * roughness - 1.0) + 1.0, 2.0));
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float ggx1 = NdotV / (NdotV * (1.0 - k) + k);
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float ggx2 = NdotL / (NdotL * (1.0 - k) + k);
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vec3 F0 = mix(vec3(0.04), vec3(1.0), metalic);
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float G = ggx1 * ggx2;
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vec3 F = F0 + (1.0-F0)*pow(1-dot(V,H),5.0);
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vec3 specular = (D*G*F)/(4*NdotL*NdotV+0.00001);
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vec3 kD = vec3(1.0) - F;
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vec3 BRDF = kD*(textureColor/3.1458493) + specular;
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float diffuse=max(0.0001,dot(N,L));
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outColor = vec4(BRDF*min(1.0,AMBIENT + diffuse), 1.0);
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}
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