157 lines
4.7 KiB
C++
157 lines
4.7 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup bmesh
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*
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* Triangulate.
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*/
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#include "DNA_modifier_types.h" /* for MOD_TRIANGULATE_NGON_BEAUTY only */
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#include "MEM_guardedalloc.h"
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#include "BLI_alloca.h"
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#include "BLI_heap.h"
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#include "BLI_linklist.h"
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#include "BLI_memarena.h"
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#include "BLI_utildefines.h"
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/* only for defines */
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#include "BLI_polyfill_2d.h"
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#include "BLI_polyfill_2d_beautify.h"
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#include "bmesh.hh"
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#include "bmesh_triangulate.hh" /* own include */
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/**
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* a version of #BM_face_triangulate that maps to #BMOpSlot
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*/
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static void bm_face_triangulate_mapping(BMesh *bm,
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BMFace *face,
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const int quad_method,
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const int ngon_method,
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const bool use_tag,
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BMOperator *op,
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BMOpSlot *slot_facemap_out,
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BMOpSlot *slot_facemap_double_out,
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MemArena *pf_arena,
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/* use for MOD_TRIANGULATE_NGON_BEAUTY only! */
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Heap *pf_heap)
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{
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int faces_array_tot = face->len - 3;
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BMFace **faces_array = BLI_array_alloca(faces_array, faces_array_tot);
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LinkNode *faces_double = nullptr;
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BLI_assert(face->len > 3);
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BM_face_triangulate(bm,
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face,
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faces_array,
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&faces_array_tot,
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nullptr,
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nullptr,
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&faces_double,
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quad_method,
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ngon_method,
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use_tag,
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pf_arena,
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pf_heap);
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if (faces_array_tot) {
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int i;
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BMO_slot_map_elem_insert(op, slot_facemap_out, face, face);
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for (i = 0; i < faces_array_tot; i++) {
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BMO_slot_map_elem_insert(op, slot_facemap_out, faces_array[i], face);
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}
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while (faces_double) {
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LinkNode *next = faces_double->next;
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BMO_slot_map_elem_insert(op, slot_facemap_double_out, faces_double->link, face);
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MEM_freeN(faces_double);
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faces_double = next;
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}
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}
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}
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void BM_mesh_triangulate(BMesh *bm,
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const int quad_method,
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const int ngon_method,
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const int min_vertices,
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const bool tag_only,
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BMOperator *op,
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BMOpSlot *slot_facemap_out,
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BMOpSlot *slot_facemap_double_out)
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{
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BMIter iter;
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BMFace *face;
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MemArena *pf_arena;
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Heap *pf_heap;
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pf_arena = BLI_memarena_new(BLI_POLYFILL_ARENA_SIZE, __func__);
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if (ngon_method == MOD_TRIANGULATE_NGON_BEAUTY) {
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pf_heap = BLI_heap_new_ex(BLI_POLYFILL_ALLOC_NGON_RESERVE);
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}
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else {
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pf_heap = nullptr;
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}
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if (slot_facemap_out) {
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/* same as below but call: bm_face_triangulate_mapping() */
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BM_ITER_MESH (face, &iter, bm, BM_FACES_OF_MESH) {
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if (face->len >= min_vertices) {
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if (tag_only == false || BM_elem_flag_test(face, BM_ELEM_TAG)) {
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bm_face_triangulate_mapping(bm,
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face,
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quad_method,
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ngon_method,
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tag_only,
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op,
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slot_facemap_out,
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slot_facemap_double_out,
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pf_arena,
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pf_heap);
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}
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}
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}
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}
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else {
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LinkNode *faces_double = nullptr;
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BM_ITER_MESH (face, &iter, bm, BM_FACES_OF_MESH) {
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if (face->len >= min_vertices) {
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if (tag_only == false || BM_elem_flag_test(face, BM_ELEM_TAG)) {
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BM_face_triangulate(bm,
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face,
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nullptr,
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nullptr,
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nullptr,
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nullptr,
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&faces_double,
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quad_method,
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ngon_method,
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tag_only,
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pf_arena,
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pf_heap);
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}
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}
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}
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while (faces_double) {
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LinkNode *next = faces_double->next;
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BM_face_kill(bm, static_cast<BMFace *>(faces_double->link));
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MEM_freeN(faces_double);
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faces_double = next;
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}
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}
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BLI_memarena_free(pf_arena);
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if (ngon_method == MOD_TRIANGULATE_NGON_BEAUTY) {
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BLI_heap_free(pf_heap, nullptr);
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}
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}
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