59 lines
1.5 KiB
GLSL
59 lines
1.5 KiB
GLSL
#version 330 core
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layout(location = 0) in vec3 a_position;
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layout(location = 1) in vec2 a_texCoord;
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layout(location = 2) in vec3 a_normal;
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layout(location = 3) in vec4 a_tangent;
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out vec3 v_normal;
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out vec2 v_texCoord;
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out vec3 v_fragmentPositionTangent;
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out vec4 v_fragmentPositionDirectionalLightSpace;
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out vec3 v_viewPositionTangent;
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struct DirectionalLight
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{
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vec3 direction;
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bool isActive;
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vec3 color;
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};
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uniform DirectionalLight u_directionalLight;
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out vec3 v_lightDirectionTangent;
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struct PointLight
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{
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vec3 position;
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bool isActive;
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vec3 color;
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};
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#define NUM_POINT_LIGHTS 1
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uniform PointLight u_pointLight[NUM_POINT_LIGHTS];
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out vec3 v_lightPositionTangent0;
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uniform vec3 u_viewPosition;
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uniform mat4 u_modelViewProjMatrix;
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uniform mat4 u_modelMatrix;
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void main()
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{
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gl_Position = u_modelViewProjMatrix * vec4(a_position, 1.0f);
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vec3 T = normalize(vec3(u_modelMatrix * vec4(a_tangent.xyz, 0.0f)));
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vec3 N = normalize(vec3(u_modelMatrix * vec4(a_normal, 0.0f)));
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T = normalize(T - dot(T, N) * N);
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vec3 B = cross(N, T) * a_tangent.w;
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mat3 TBN_transposed = transpose(mat3(T, B, N));
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v_lightDirectionTangent = TBN_transposed * u_directionalLight.direction;
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v_lightPositionTangent0 = TBN_transposed * u_pointLight[0].position;
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v_fragmentPositionTangent = TBN_transposed * vec3(u_modelMatrix * vec4(a_position, 1.0f));
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v_viewPositionTangent = TBN_transposed * u_viewPosition; // seems like this is always 0 ?
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v_normal = a_normal;
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v_texCoord = a_texCoord;
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}
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