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
223
224
225
226
227
228
229
230
231
232
233
|
/*
* 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.
*
* The Original Code is Copyright (C) 2018 by Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup bke
*/
#include "BKE_subdiv.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_modifier_types.h"
#include "BLI_utildefines.h"
#include "MEM_guardedalloc.h"
#include "subdiv_converter.h"
#include "opensubdiv_capi.h"
#include "opensubdiv_converter_capi.h"
#include "opensubdiv_evaluator_capi.h"
#include "opensubdiv_topology_refiner_capi.h"
/* =================----====--===== MODULE ==========================------== */
void BKE_subdiv_init()
{
openSubdiv_init();
}
void BKE_subdiv_exit()
{
openSubdiv_cleanup();
}
/* ========================== CONVERSION HELPERS ============================ */
eSubdivFVarLinearInterpolation BKE_subdiv_fvar_interpolation_from_uv_smooth(int uv_smooth)
{
switch (uv_smooth) {
case SUBSURF_UV_SMOOTH_NONE:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_ALL;
case SUBSURF_UV_SMOOTH_PRESERVE_CORNERS:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_ONLY;
case SUBSURF_UV_SMOOTH_PRESERVE_CORNERS_AND_JUNCTIONS:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_AND_JUNCTIONS;
case SUBSURF_UV_SMOOTH_PRESERVE_CORNERS_JUNCTIONS_AND_CONCAVE:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_JUNCTIONS_AND_CONCAVE;
case SUBSURF_UV_SMOOTH_PRESERVE_BOUNDARIES:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_BOUNDARIES;
case SUBSURF_UV_SMOOTH_ALL:
return SUBDIV_FVAR_LINEAR_INTERPOLATION_NONE;
}
BLI_assert(!"Unknown uv smooth flag");
return SUBDIV_FVAR_LINEAR_INTERPOLATION_ALL;
}
/* ================================ SETTINGS ================================ */
static bool check_mesh_has_non_quad(const Mesh *mesh)
{
for (int poly_index = 0; poly_index < mesh->totpoly; poly_index++) {
const MPoly *poly = &mesh->mpoly[poly_index];
if (poly->totloop != 4) {
return true;
}
}
return false;
}
void BKE_subdiv_settings_validate_for_mesh(SubdivSettings *settings, const Mesh *mesh)
{
if (settings->level != 1) {
return;
}
if (check_mesh_has_non_quad(mesh)) {
settings->level = 2;
}
}
bool BKE_subdiv_settings_equal(const SubdivSettings *settings_a, const SubdivSettings *settings_b)
{
return (settings_a->is_simple == settings_b->is_simple &&
settings_a->is_adaptive == settings_b->is_adaptive &&
settings_a->level == settings_b->level &&
settings_a->vtx_boundary_interpolation == settings_b->vtx_boundary_interpolation &&
settings_a->fvar_linear_interpolation == settings_b->fvar_linear_interpolation);
}
/* ============================== CONSTRUCTION ============================== */
/* Creation from scratch. */
Subdiv *BKE_subdiv_new_from_converter(const SubdivSettings *settings,
struct OpenSubdiv_Converter *converter)
{
SubdivStats stats;
BKE_subdiv_stats_init(&stats);
BKE_subdiv_stats_begin(&stats, SUBDIV_STATS_TOPOLOGY_REFINER_CREATION_TIME);
OpenSubdiv_TopologyRefinerSettings topology_refiner_settings;
topology_refiner_settings.level = settings->level;
topology_refiner_settings.is_adaptive = settings->is_adaptive;
struct OpenSubdiv_TopologyRefiner *osd_topology_refiner = NULL;
if (converter->getNumVertices(converter) != 0) {
osd_topology_refiner = openSubdiv_createTopologyRefinerFromConverter(
converter, &topology_refiner_settings);
}
else {
/* TODO(sergey): Check whether original geometry had any vertices.
* The thing here is: OpenSubdiv can only deal with faces, but our
* side of subdiv also deals with loose vertices and edges. */
}
Subdiv *subdiv = MEM_callocN(sizeof(Subdiv), "subdiv from converetr");
subdiv->settings = *settings;
subdiv->topology_refiner = osd_topology_refiner;
subdiv->evaluator = NULL;
subdiv->displacement_evaluator = NULL;
BKE_subdiv_stats_end(&stats, SUBDIV_STATS_TOPOLOGY_REFINER_CREATION_TIME);
subdiv->stats = stats;
return subdiv;
}
Subdiv *BKE_subdiv_new_from_mesh(const SubdivSettings *settings, const Mesh *mesh)
{
if (mesh->totvert == 0) {
return NULL;
}
OpenSubdiv_Converter converter;
BKE_subdiv_converter_init_for_mesh(&converter, settings, mesh);
Subdiv *subdiv = BKE_subdiv_new_from_converter(settings, &converter);
BKE_subdiv_converter_free(&converter);
return subdiv;
}
/* Creation with cached-aware semantic. */
Subdiv *BKE_subdiv_update_from_converter(Subdiv *subdiv,
const SubdivSettings *settings,
OpenSubdiv_Converter *converter)
{
/* Check if the existing descriptor can be re-used. */
bool can_reuse_subdiv = true;
if (subdiv != NULL && subdiv->topology_refiner != NULL) {
if (!BKE_subdiv_settings_equal(&subdiv->settings, settings)) {
can_reuse_subdiv = false;
}
else {
BKE_subdiv_stats_begin(&subdiv->stats, SUBDIV_STATS_TOPOLOGY_COMPARE);
can_reuse_subdiv = openSubdiv_topologyRefinerCompareWithConverter(subdiv->topology_refiner,
converter);
BKE_subdiv_stats_end(&subdiv->stats, SUBDIV_STATS_TOPOLOGY_COMPARE);
}
}
else {
can_reuse_subdiv = false;
}
if (can_reuse_subdiv) {
return subdiv;
}
/* Create new subdiv. */
if (subdiv != NULL) {
BKE_subdiv_free(subdiv);
}
return BKE_subdiv_new_from_converter(settings, converter);
}
Subdiv *BKE_subdiv_update_from_mesh(Subdiv *subdiv,
const SubdivSettings *settings,
const Mesh *mesh)
{
OpenSubdiv_Converter converter;
BKE_subdiv_converter_init_for_mesh(&converter, settings, mesh);
subdiv = BKE_subdiv_update_from_converter(subdiv, settings, &converter);
BKE_subdiv_converter_free(&converter);
return subdiv;
}
/* Memory release. */
void BKE_subdiv_free(Subdiv *subdiv)
{
if (subdiv->evaluator != NULL) {
openSubdiv_deleteEvaluator(subdiv->evaluator);
}
if (subdiv->topology_refiner != NULL) {
openSubdiv_deleteTopologyRefiner(subdiv->topology_refiner);
}
BKE_subdiv_displacement_detach(subdiv);
if (subdiv->cache_.face_ptex_offset != NULL) {
MEM_freeN(subdiv->cache_.face_ptex_offset);
}
MEM_freeN(subdiv);
}
/* =========================== PTEX FACES AND GRIDS ========================= */
int *BKE_subdiv_face_ptex_offset_get(Subdiv *subdiv)
{
if (subdiv->cache_.face_ptex_offset != NULL) {
return subdiv->cache_.face_ptex_offset;
}
OpenSubdiv_TopologyRefiner *topology_refiner = subdiv->topology_refiner;
if (topology_refiner == NULL) {
return NULL;
}
const int num_coarse_faces = topology_refiner->getNumFaces(topology_refiner);
subdiv->cache_.face_ptex_offset = MEM_malloc_arrayN(
num_coarse_faces, sizeof(int), "subdiv face_ptex_offset");
int ptex_offset = 0;
for (int face_index = 0; face_index < num_coarse_faces; face_index++) {
const int num_ptex_faces = topology_refiner->getNumFacePtexFaces(topology_refiner, face_index);
subdiv->cache_.face_ptex_offset[face_index] = ptex_offset;
ptex_offset += num_ptex_faces;
}
return subdiv->cache_.face_ptex_offset;
}
|
