j3oss
78 lines
1.7 KiB
GLSL
78 lines
1.7 KiB
GLSL
#version 450
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#extension GL_EXT_nonuniform_qualifier : require
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struct Vertex {
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vec4 position;
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vec4 normal;
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vec2 uv[2];
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vec4 tangent;
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vec4 bitangent; // No longer needed. // TODO remove
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};
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struct Light {
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mat4 transform;
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vec4 color;
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float intensity;
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};
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layout( push_constant ) uniform constants
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{
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mat4 transform;
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uint indexBufferIndex;
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uint vertexBufferIndex;
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} PushConstants;
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layout(set = 0, binding = 1) buffer VertexBuffer {
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layout(align = 16) Vertex vertices[];
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} VertexBuffers[];
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layout(set = 0, binding = 2) buffer IndexBuffer {
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uint indices[];
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} IndexBuffers[];
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const int MAX_LIGHT_COUNT = 128;
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layout(set = 1, binding = 0) uniform LightBuffer {
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layout(align = 16) Light lights[MAX_LIGHT_COUNT];
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} LightsBuffer;
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mat4 get_orthographicMatrix(float l, float r, float b, float t, float f, float n)
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{
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mat4 M = mat4(0);
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// set OpenGL perspective projection matrix
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M[0][0] = 2 / (r - l);
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M[0][1] = 0;
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M[0][2] = 0;
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M[0][3] = 0;
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M[1][0] = 0;
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M[1][1] = -2 / (t - b);
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M[1][2] = 0;
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M[1][3] = 0;
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M[2][0] = 0;
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M[2][1] = 0;
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M[2][2] = -2 / (f - n);
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M[2][3] = 0;
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M[0][3] = -(r + l) / (r - l);
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M[1][3] = -(t + b) / (t - b);
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M[2][3] = -(f + n) / (f - n);
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M[3][3] = 1;
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return M;
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}
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void main()
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{
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uint index = IndexBuffers[ PushConstants.indexBufferIndex ].indices[gl_VertexIndex];
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Vertex vertex = VertexBuffers[ PushConstants.vertexBufferIndex ].vertices[ index ];
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mat4 lightView = inverse( LightsBuffer.lights[0].transform);
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mat4 lightProjection = get_orthographicMatrix(-1, 1, -1, 1, 100, 0.1);
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mat4 lightSpaceMatrix = lightProjection * lightView;
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gl_Position = lightSpaceMatrix * PushConstants.transform * vec4(vertex.position.xyz, 1.0);
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}
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