1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/** \file
* \ingroup bmesh
*
* Connect verts across faces (splits faces).
*/
#include "BLI_alloca.h"
#include "BLI_linklist_stack.h"
#include "BLI_utildefines.h"
#include "BLI_utildefines_stack.h"
#include "bmesh.h"
#include "intern/bmesh_operators_private.h" /* own include */
#define VERT_INPUT 1
#define EDGE_OUT 1
/* Edge spans 2 VERT_INPUT's, its a nop,
* but include in "edges.out" */
#define EDGE_OUT_ADJ 2
#define FACE_TAG 2
#define FACE_EXCLUDE 4
static int bm_face_connect_verts(BMesh *bm, BMFace *f, const bool check_degenerate)
{
const uint pair_split_max = f->len / 2;
BMLoop *(*loops_split)[2] = BLI_array_alloca(loops_split, pair_split_max);
STACK_DECLARE(loops_split);
BMVert *(*verts_pair)[2] = BLI_array_alloca(verts_pair, pair_split_max);
STACK_DECLARE(verts_pair);
BMLoop *l_tag_prev = NULL, *l_tag_first = NULL;
BMLoop *l_iter, *l_first;
uint i;
int result = 1;
STACK_INIT(loops_split, pair_split_max);
STACK_INIT(verts_pair, pair_split_max);
l_iter = l_first = BM_FACE_FIRST_LOOP(f);
do {
if (BMO_vert_flag_test(bm, l_iter->v, VERT_INPUT) &&
/* ensure this vertex isnt part of a contiguous group */
((BMO_vert_flag_test(bm, l_iter->prev->v, VERT_INPUT) == 0) ||
(BMO_vert_flag_test(bm, l_iter->next->v, VERT_INPUT) == 0))) {
if (!l_tag_prev) {
l_tag_prev = l_tag_first = l_iter;
continue;
}
if (!BM_loop_is_adjacent(l_tag_prev, l_iter)) {
BMEdge *e;
e = BM_edge_exists(l_tag_prev->v, l_iter->v);
if (e == NULL || !BMO_edge_flag_test(bm, e, EDGE_OUT)) {
BMLoop **l_pair = STACK_PUSH_RET(loops_split);
l_pair[0] = l_tag_prev;
l_pair[1] = l_iter;
}
}
l_tag_prev = l_iter;
}
} while ((l_iter = l_iter->next) != l_first);
if (STACK_SIZE(loops_split) == 0) {
return 0;
}
if (!BM_loop_is_adjacent(l_tag_first, l_tag_prev) &&
/* ensure we don't add the same pair twice */
(((loops_split[0][0] == l_tag_first) && (loops_split[0][1] == l_tag_prev)) == 0)) {
BMLoop **l_pair = STACK_PUSH_RET(loops_split);
l_pair[0] = l_tag_first;
l_pair[1] = l_tag_prev;
}
if (check_degenerate) {
BM_face_splits_check_legal(bm, f, loops_split, STACK_SIZE(loops_split));
}
else {
BM_face_splits_check_optimal(f, loops_split, STACK_SIZE(loops_split));
}
for (i = 0; i < STACK_SIZE(loops_split); i++) {
BMVert **v_pair;
if (loops_split[i][0] == NULL) {
continue;
}
v_pair = STACK_PUSH_RET(verts_pair);
v_pair[0] = loops_split[i][0]->v;
v_pair[1] = loops_split[i][1]->v;
}
/* Clear and re-use to store duplicate faces, to remove after splitting is finished. */
STACK_CLEAR(loops_split);
for (i = 0; i < STACK_SIZE(verts_pair); i++) {
BMFace *f_new;
BMLoop *l_new;
BMLoop *l_pair[2];
/* Note that duplicate edges in this case is very unlikely but it can happen, see T70287. */
bool edge_exists = (BM_edge_exists(verts_pair[i][0], verts_pair[i][1]) != NULL);
if ((l_pair[0] = BM_face_vert_share_loop(f, verts_pair[i][0])) &&
(l_pair[1] = BM_face_vert_share_loop(f, verts_pair[i][1]))) {
f_new = BM_face_split(bm, f, l_pair[0], l_pair[1], &l_new, NULL, edge_exists);
/* Check if duplicate faces have been created, store the loops for removal in this case.
* Note that this matches how triangulate works (newly created duplicates get removed). */
if (UNLIKELY(edge_exists)) {
BMLoop **l_pair_deferred_remove = NULL;
for (int j = 0; j < 2; j++) {
if (BM_face_find_double(l_pair[j]->f)) {
if (l_pair_deferred_remove == NULL) {
l_pair_deferred_remove = STACK_PUSH_RET(loops_split);
l_pair_deferred_remove[0] = NULL;
l_pair_deferred_remove[1] = NULL;
}
l_pair_deferred_remove[j] = l_pair[j];
}
}
}
}
else {
f_new = NULL;
l_new = NULL;
}
if (!l_new || !f_new) {
result = -1;
break;
}
f = f_new;
// BMO_face_flag_enable(bm, f_new, FACE_NEW);
BMO_edge_flag_enable(bm, l_new->e, EDGE_OUT);
}
for (i = 0; i < STACK_SIZE(loops_split); i++) {
for (int j = 0; j < 2; j++) {
if (loops_split[i][j] != NULL) {
BM_face_kill(bm, loops_split[i][j]->f);
}
}
}
return result;
}
void bmo_connect_verts_exec(BMesh *bm, BMOperator *op)
{
BMOIter siter;
BMVert *v;
BMFace *f;
const bool check_degenerate = BMO_slot_bool_get(op->slots_in, "check_degenerate");
BLI_LINKSTACK_DECLARE(faces, BMFace *);
BLI_LINKSTACK_INIT(faces);
/* tag so we won't touch ever (typically hidden faces) */
BMO_slot_buffer_flag_enable(bm, op->slots_in, "faces_exclude", BM_FACE, FACE_EXCLUDE);
/* add all faces connected to verts */
BMO_ITER (v, &siter, op->slots_in, "verts", BM_VERT) {
BMIter iter;
BMLoop *l_iter;
BMO_vert_flag_enable(bm, v, VERT_INPUT);
BM_ITER_ELEM (l_iter, &iter, v, BM_LOOPS_OF_VERT) {
f = l_iter->f;
if (!BMO_face_flag_test(bm, f, FACE_EXCLUDE)) {
if (!BMO_face_flag_test(bm, f, FACE_TAG)) {
BMO_face_flag_enable(bm, f, FACE_TAG);
if (f->len > 3) {
BLI_LINKSTACK_PUSH(faces, f);
}
}
}
/* flag edges even if these are not newly created
* this way cut-pairs that include co-linear edges will get
* predictable output. */
if (BMO_vert_flag_test(bm, l_iter->prev->v, VERT_INPUT)) {
BMO_edge_flag_enable(bm, l_iter->prev->e, EDGE_OUT_ADJ);
}
if (BMO_vert_flag_test(bm, l_iter->next->v, VERT_INPUT)) {
BMO_edge_flag_enable(bm, l_iter->e, EDGE_OUT_ADJ);
}
}
}
/* connect faces */
while ((f = BLI_LINKSTACK_POP(faces))) {
if (bm_face_connect_verts(bm, f, check_degenerate) == -1) {
BMO_error_raise(bm, op, BMERR_CONNECTVERT_FAILED, NULL);
}
}
BLI_LINKSTACK_FREE(faces);
BMO_slot_buffer_from_enabled_flag(
bm, op, op->slots_out, "edges.out", BM_EDGE, EDGE_OUT | EDGE_OUT_ADJ);
}
|
