35 lines
1.1 KiB
GLSL
35 lines
1.1 KiB
GLSL
#version 460
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#extension GL_GOOGLE_include_directive : require
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#include "mesh_pcs.glsl"
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layout (location = 0) out vec3 outPos;
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layout (location = 1) out vec2 outUV;
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layout (location = 2) out vec3 outNormal;
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layout (location = 3) out vec4 outTangent;
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layout (location = 4) out mat3 outTBN;
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void main()
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{
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Vertex v = pcs.vertexBuffer.vertices[gl_VertexIndex];
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vec4 worldPos = pcs.transform * vec4(v.position, 1.0f);
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gl_Position = pcs.sceneData.viewProj * worldPos;
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outPos = worldPos.xyz;
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outUV = vec2(v.uv_x, v.uv_y);
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// A bit inefficient, but okay - this is needed for non-uniform scale
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// models. See: http://www.lighthouse3d.com/tutorials/glsl-12-tutorial/the-normal-matrix/
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// Simpler case, when everything is uniform
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// outNormal = (pcs.transform * vec4(v.normal, 0.0)).xyz;
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outNormal = mat3(transpose(inverse(pcs.transform))) * v.normal;
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outTangent = v.tangent;
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vec3 T = normalize(vec3(pcs.transform * v.tangent));
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vec3 N = normalize(outNormal);
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vec3 B = cross(N, T) * v.tangent.w;
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outTBN = mat3(T, B, N);
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}
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