115 lines
No EOL
4.8 KiB
GLSL
115 lines
No EOL
4.8 KiB
GLSL
#version 450
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layout(set = 3, binding = 0) readonly buffer FaceBuffer {
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uint faces[];
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};
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layout(push_constant) uniform matrices {
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vec4 ModelOffset;
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vec4 Padding0;
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vec4 Padding1;
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vec4 Padding2;
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uint materialIdx;
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} push_constants;
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layout(location = 0) out vec2 outTextCoord;
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layout(location = 1) out flat uint outMaterialIdx;
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const uint TRI_TO_CORNER[6] = uint[6](0u, 1u, 2u, 0u, 2u, 3u);
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const vec3 NORMALS[8] = vec3[8](
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vec3( 0.0, 1.0, 0.0), // Face 0 (+Y)
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vec3( 0.0, -1.0, 0.0), // Face 1 (-Y)
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vec3( 1.0, 0.0, 0.0), // Face 2 (+X)
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vec3(-1.0, 0.0, 0.0), // Face 3 (-X)
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vec3( 0.0, 0.0, 1.0), // Face 4 (+Z)
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vec3( 0.0, 0.0, -1.0), // Face 5 (-Z)
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vec3(-0.7071, 0.0, 0.7071), // Face 6
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vec3( 0.7071, 0.0, 0.7071) // Face 7
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);
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const vec3 TANGENTS[8] = vec3[8](
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vec3( 1.0, 0.0, 0.0), // Face 0
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vec3( 1.0, 0.0, 0.0), // Face 1
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vec3( 0.0, 0.0, -1.0), // Face 2
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vec3( 0.0, 0.0, 1.0), // Face 3
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vec3( 1.0, 0.0, 0.0), // Face 4
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vec3(-1.0, 0.0, 0.0), // Face 5
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vec3( 0.7071, 0.0, 0.7071), // Face 6
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vec3( 0.7071, 0.0,-0.7071) // Face 7
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);
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const vec3 BITANGENTS[8] = vec3[8](
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vec3( 0.0, 0.0, 1.0), // Face 0
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vec3( 0.0, 0.0, -1.0), // Face 1
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vec3( 0.0, 1.0, 0.0), // Face 2
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vec3( 0.0, 1.0, 0.0), // Face 3
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vec3( 0.0, 1.0, 0.0), // Face 4
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vec3( 0.0, 1.0, 0.0), // Face 5
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vec3( 0.0, 1.0, 0.0), // Face 6
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vec3( 0.0, 1.0, 0.0) // Face 7
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);
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const vec2 CORNER_UVS[5][4] = vec2[5][4](
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vec2[4](vec2(0.5, 0.0), vec2(0.5, 0.5), vec2(1.0, 0.5), vec2(1.0, 0.0)),
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vec2[4](vec2(0.0, 0.5), vec2(0.0, 1.0), vec2(0.5, 1.0), vec2(0.5, 0.5)),
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vec2[4](vec2(0.5, 0.0), vec2(0.5, 0.5), vec2(1.0, 0.5), vec2(1.0, 0.0)),
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vec2[4](vec2(0.5, 0.0), vec2(0.5, 0.5), vec2(1.0, 0.5), vec2(1.0, 0.0)),
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vec2[4](vec2(1.0, 1.0), vec2(1.0, 0.5), vec2(0.5, 0.5), vec2(0.5, 1.0))
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);
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const vec2 CORNER_UVS_GRASS_BLOCK[8][4] = vec2[8][4](
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vec2[4](vec2(0.0, 0.0), vec2(0.0, 1.0), vec2(1.0, 1.0), vec2(1.0, 0.0)),
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vec2[4](vec2(0.0, 0.0), vec2(0.0, 1.0), vec2(1.0, 1.0), vec2(1.0, 0.0)),
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vec2[4](vec2(1.0, 1.0), vec2(1.0, 0.0),vec2(0.0, 0.0), vec2(0.0, 1.0)),
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vec2[4]( vec2(0.0, 1.0),vec2(1.0, 1.0), vec2(1.0, 0.0),vec2(0.0, 0.0)),
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vec2[4]( vec2(0.0, 1.0),vec2(1.0, 1.0), vec2(1.0, 0.0),vec2(0.0, 0.0)),
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vec2[4](vec2(1.0, 1.0), vec2(1.0, 0.0),vec2(0.0, 0.0), vec2(0.0, 1.0)),
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vec2[4](vec2(1.0, 1.0), vec2(1.0, 0.0), vec2(0.0, 0.0), vec2(0.0, 1.0)),
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vec2[4](vec2(1.0, 1.0), vec2(1.0, 0.0), vec2(0.0, 0.0), vec2(0.0, 1.0))
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);
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const vec3 FACE_CORNERS[8][4] = vec3[8][4](
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vec3[4](vec3(0.0, 1.0, 0.0), vec3(0.0, 1.0, 1.0), vec3(1.0, 1.0, 1.0), vec3(1.0, 1.0, 0.0)), // Face 0 (+Y)
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vec3[4](vec3(0.0, 0.0, 0.0), vec3(1.0, 0.0, 0.0), vec3(1.0, 0.0, 1.0), vec3(0.0, 0.0, 1.0)), // Face 1 (-Y)
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vec3[4](vec3(1.0, 0.0, 0.0), vec3(1.0, 1.0, 0.0), vec3(1.0, 1.0, 1.0), vec3(1.0, 0.0, 1.0)), // Face 2 (+X)
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vec3[4](vec3(0.0, 0.0, 0.0), vec3(0.0, 0.0, 1.0), vec3(0.0, 1.0, 1.0), vec3(0.0, 1.0, 0.0)), // Face 3 (-X)
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vec3[4](vec3(0.0, 0.0, 1.0), vec3(1.0, 0.0, 1.0), vec3(1.0, 1.0, 1.0), vec3(0.0, 1.0, 1.0)), // Face 4 (+Z)
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vec3[4](vec3(0.0, 0.0, 0.0), vec3(0.0, 1.0, 0.0), vec3(1.0, 1.0, 0.0), vec3(1.0, 0.0, 0.0)), // Face 5 (-Z)
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vec3[4](vec3(0.0, 0.0, 0.0), vec3(0.0, 1.0, 0.0), vec3(1.0, 1.0, 1.0), vec3(1.0, 0.0, 1.0)), // Face 6 (cross model pane 1)
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vec3[4](vec3(0.0, 0.0, 1.0), vec3(0.0, 1.0, 1.0), vec3(1.0, 1.0, 0.0), vec3(1.0, 0.0, 0.0)) // Face 7 (cross model pane 2)
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);
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void main() {
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uint faceRecordIndex = uint(gl_VertexIndex) / 6u;
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uint triangleVertex = (uint(gl_VertexIndex))% 6u;
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uint cornerIndex = TRI_TO_CORNER[triangleVertex];
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uint packedFace = faces[faceRecordIndex];
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uint voxelX = packedFace & 0xFu;
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uint voxelY = (packedFace >> 4u) & 0xFu;
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uint voxelZ = (packedFace >> 8u) & 0xFu;
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uint faceId = (packedFace >> 12u) & 0x7u;
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uint matId = (packedFace >> 15u) & 0x7FFu;
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uint texIdxX = (packedFace >> 26u) & 0x7u;
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uint texIdxY = (packedFace >> 29u) & 0x7u;
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vec2 texID = vec2((texIdxX)/4.0,(texIdxY)/4.0);
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vec2 scalar = vec2(1.0/4.0,1.0/4.0);
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faceId = min(faceId, 7u);
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vec3 localPos = vec3(voxelX, voxelY, voxelZ) + FACE_CORNERS[faceId][cornerIndex];
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vec3 worldPos = localPos + push_constants.ModelOffset.xyz * 16.0;
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if (gl_InstanceIndex != 0) {
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uint encoded = uint(gl_InstanceIndex);
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worldPos += vec3(int(encoded & 1023u) - 512, int((encoded >> 10u) & 1023u) - 512,
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int((encoded >> 20u) & 1023u) - 512) * 16.0;
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}
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outTextCoord = CORNER_UVS_GRASS_BLOCK[faceId][cornerIndex] * scalar + texID;
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outMaterialIdx = matId;
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gl_Position = vec4(worldPos, 1.0);
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} |