61 lines
1.6 KiB
GLSL
61 lines
1.6 KiB
GLSL
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#version 450 core
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uniform sampler2D texture_basecolor;
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uniform sampler2D texture_metallic_roughness;
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uniform sampler2D texture_normal;
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uniform bool texture_basecolor_available = false;
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uniform bool texture_metallic_roughness_available = false;
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uniform bool texture_normal_available = false;
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uniform vec3 baseColor;
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uniform vec2 metallicRoughness;
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layout (location = 0) out vec4 gBaseColor;
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layout (location = 1) out vec3 gNormal;
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layout (location = 2) out vec3 gPosition;
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layout (location = 3) out vec2 gMetallicRoughness;
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layout (location = 4) out vec4 gDebug;
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in vec2 TexCoords;
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in vec3 WorldPos;
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in vec3 Normal;
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vec3 getNormalFromMap()
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{
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vec3 tangentNormal = texture(texture_normal, TexCoords).xyz * 2.0 - 1.0;
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vec3 Q1 = dFdx(WorldPos);
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vec3 Q2 = dFdy(WorldPos);
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vec2 st1 = dFdx(TexCoords);
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vec2 st2 = dFdy(TexCoords);
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vec3 N = normalize(Normal);
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vec3 T = normalize(Q1*st2.t - Q2*st1.t);
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vec3 B = -normalize(cross(N, T));
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mat3 TBN = mat3(T, B, N);
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return normalize(TBN * tangentNormal);
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}
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void main()
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{
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if(texture_basecolor_available)
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gBaseColor = texture(texture_basecolor, TexCoords);
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else
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gBaseColor = vec4(baseColor, 1);
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if(gBaseColor.a<0.4)
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discard;
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gPosition = WorldPos;
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if(texture_normal_available)
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gNormal = getNormalFromMap();
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else
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gNormal = Normal;
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if(!gl_FrontFacing)
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gNormal = -gNormal;
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if(texture_metallic_roughness_available)
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gMetallicRoughness = texture(texture_metallic_roughness, TexCoords).bg;
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else
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gMetallicRoughness = metallicRoughness;
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gDebug = vec4(0);
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}
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