d496e69eca
The `common_` prefix can be confusing as there are other common_ files as well. Pull Request: https://projects.blender.org/blender/blender/pulls/134184
67 lines
1.8 KiB
GLSL
67 lines
1.8 KiB
GLSL
/* SPDX-FileCopyrightText: 2021-2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/* To be compiled with subdiv_lib.glsl */
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/* Generate triangles from subdivision quads indices. */
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layout(std430, binding = 1) readonly restrict buffer extraCoarseFaceData
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{
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uint extra_coarse_face_data[];
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};
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layout(std430, binding = 2) writeonly buffer outputTriangles
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{
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uint output_tris[];
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};
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#ifndef SINGLE_MATERIAL
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layout(std430, binding = 3) readonly buffer inputPolygonMatOffset
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{
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int face_mat_offset[];
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};
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#endif
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bool is_face_hidden(uint coarse_quad_index)
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{
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return (extra_coarse_face_data[coarse_quad_index] & coarse_face_hidden_mask) != 0;
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}
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void main()
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{
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uint quad_index = get_global_invocation_index();
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if (quad_index >= total_dispatch_size) {
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return;
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}
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uint loop_index = quad_index * 4;
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uint coarse_quad_index = coarse_face_index_from_subdiv_quad_index(quad_index, coarse_face_count);
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#ifdef SINGLE_MATERIAL
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uint triangle_loop_index = quad_index * 6;
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#else
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int mat_offset = face_mat_offset[coarse_quad_index];
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int triangle_loop_index = (int(quad_index) + mat_offset) * 6;
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#endif
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if (use_hide && is_face_hidden(coarse_quad_index)) {
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output_tris[triangle_loop_index + 0] = 0xffffffff;
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output_tris[triangle_loop_index + 1] = 0xffffffff;
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output_tris[triangle_loop_index + 2] = 0xffffffff;
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output_tris[triangle_loop_index + 3] = 0xffffffff;
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output_tris[triangle_loop_index + 4] = 0xffffffff;
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output_tris[triangle_loop_index + 5] = 0xffffffff;
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}
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else {
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output_tris[triangle_loop_index + 0] = loop_index + 0;
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output_tris[triangle_loop_index + 1] = loop_index + 1;
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output_tris[triangle_loop_index + 2] = loop_index + 2;
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output_tris[triangle_loop_index + 3] = loop_index + 0;
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output_tris[triangle_loop_index + 4] = loop_index + 2;
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output_tris[triangle_loop_index + 5] = loop_index + 3;
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}
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}
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