35 lines
860 B
Plaintext
35 lines
860 B
Plaintext
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#version 460 core
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layout (location = 0) in vec3 v_pos;
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layout (location = 1) in vec3 v_normal;
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layout (location = 2) in vec3 v_tangent;
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layout (location = 3) in vec2 v_texcoord;
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out VS_OUT {
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vec3 viewPos;
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vec2 texcoord;
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mat3 TBN;
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} vs_out;
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layout (std140, binding=0) uniform FrameMatrices {
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mat4 view;
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mat4 projection;
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};
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layout (location=0) uniform mat4 model;
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void main() {
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gl_Position = projection * view * model * vec4(v_pos, 1.0);
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vs_out.texcoord = v_texcoord;
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// Gram-schmidt process for re-orthogonalizing the TBN vectors
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vec3 T = normalize(vec3(view * model * vec4(v_tangent, 0.0)));
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vec3 N = normalize(vec3(view * model * vec4(v_normal, 0.0)));
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T = normalize(T - dot(T, N) * N);
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vec3 B = cross(N, T);
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vs_out.TBN = mat3(T, B, N);
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vs_out.viewPos = (view * model * vec4(v_pos, 1.0)).xyz;
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}
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