51 lines
1.5 KiB
GLSL
51 lines
1.5 KiB
GLSL
#version 430 core
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layout(location = 0) in vec3 vertexPosition;
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layout(location = 1) in vec3 vertexNormal;
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layout(location = 2) in vec2 vertexTexCoord;
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layout(location = 3) in vec3 vertexTangent;
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layout(location = 4) in vec3 vertexBitangent;
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uniform mat4 transformation;
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uniform mat4 modelMat;
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uniform vec3 cameraPos;
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uniform vec3 sunPos;
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uniform vec3 reflectorPos;
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out vec3 vertexPosWld;
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out vec2 vertexTexCoordOut;
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out vec3 viewDirTS;
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out vec3 sunLightDirTS;
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out vec3 reflectorLightDirTS;
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void main()
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{
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gl_Position = transformation * vec4(vertexPosition, 1.0);
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vec3 normal = (modelMat * vec4(vertexNormal, 0.0)).xyz;
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vec3 tangent = (modelMat * vec4(vertexTangent, 0.0)).xyz;
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vec3 bitangent = (modelMat * vec4(vertexBitangent, 0.0)).xyz;
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vertexPosWld = (modelMat * vec4(vertexPosition, 1.0)).xyz;
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vertexTexCoordOut = vertexTexCoord;
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mat3 TBN = transpose(mat3(tangent, bitangent, normal));
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//`lightPos - vertexPos` from tutorial is wrong?
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//TODO why should we normalize here if we would normalize Tangent Space vectors later?
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// and why do it here, mb fragment shader?
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vec3 sunLightDir = normalize(vertexPosWld - sunPos);
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vec3 reflectorLightDir = normalize(vertexPosWld - reflectorPos);
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vec3 viewDir = normalize(cameraPos - vertexPosWld);
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// tangent space
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viewDirTS = TBN * viewDir;
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sunLightDirTS = TBN * sunLightDir;
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reflectorLightDirTS = TBN * reflectorLightDir;
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//TODO should normilize here or in the fragment shader?
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viewDirTS = normalize(viewDirTS);
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sunLightDirTS = normalize(sunLightDirTS);
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reflectorLightDirTS = normalize(reflectorLightDirTS);
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}
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