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- /*******************************************************************************************
- *
- * rPBR [shader] - Physically based rendering vertex shader
- *
- * Copyright (c) 2017 Victor Fisac
- *
- **********************************************************************************************/
-
- #version 330
-
- // Input vertex attributes
- in vec3 vertexPosition;
- in vec2 vertexTexCoord;
- in vec3 vertexNormal;
- in vec4 vertexTangent;
-
- // Input uniform values
- uniform mat4 mvp;
- uniform mat4 mMatrix;
-
- // Output vertex attributes (to fragment shader)
- out vec3 fragPosition;
- out vec2 fragTexCoord;
- out vec3 fragNormal;
- out vec3 fragTangent;
- out vec3 fragBinormal;
-
- void main()
- {
- // Calculate binormal from vertex normal and tangent
- vec3 vertexBinormal = cross(vertexNormal, vec3(vertexTangent));
-
- // Calculate fragment normal based on normal transformations
- mat3 normalMatrix = transpose(inverse(mat3(mMatrix)));
-
- // Calculate fragment position based on model transformations
- fragPosition = vec3(mMatrix*vec4(vertexPosition, 1.0f));
-
- // Send vertex attributes to fragment shader
- fragTexCoord = vertexTexCoord;
- fragNormal = normalize(normalMatrix*vertexNormal);
- fragTangent = normalize(normalMatrix*vec3(vertexTangent));
- fragTangent = normalize(fragTangent - dot(fragTangent, fragNormal)*fragNormal);
- fragBinormal = normalize(normalMatrix*vertexBinormal);
- fragBinormal = cross(fragNormal, fragTangent);
-
- // Calculate final vertex position
- gl_Position = mvp*vec4(vertexPosition, 1.0);
- }
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