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
|
/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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.
*
* Contributor(s): Sergey Sharybin.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/blenkernel/intern/subdiv_ccg.c
* \ingroup bke
*/
#include "BKE_subdiv_ccg.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "MEM_guardedalloc.h"
#include "BKE_ccg.h"
#include "BKE_subdiv.h"
static void subdiv_ccg_init_layers(SubdivCCG *subdiv_ccg,
const SubdivToCCGSettings *settings)
{
/* CCG always contains coordinates. Rest of layers are coming after them. */
int layer_offset = sizeof(float) * 3;
/* Normals. */
if (settings->need_normal) {
subdiv_ccg->has_normal = true;
subdiv_ccg->normal_offset = layer_offset;
layer_offset += sizeof(float) * 3;
}
else {
subdiv_ccg->has_normal = false;
subdiv_ccg->normal_offset = -1;
}
/* Mask. */
if (settings->need_mask) {
subdiv_ccg->has_mask = true;
subdiv_ccg->mask_offset = layer_offset;
layer_offset += sizeof(float);
}
else {
subdiv_ccg->has_mask = false;
subdiv_ccg->mask_offset = -1;
}
}
static int grid_size_for_level_get(const SubdivCCG *subdiv_ccg, int level)
{
BLI_assert(level >= 1);
BLI_assert(level <= subdiv_ccg->level);
UNUSED_VARS_NDEBUG(subdiv_ccg);
return (1 << (level - 1)) + 1;
}
/* Per-vertex element size in bytes. */
static int element_size_get(const SubdivCCG *subdiv_ccg)
{
/* We always have 3 floats for coordinate. */
int num_floats = 3;
if (subdiv_ccg->has_normal) {
num_floats += 3;
}
if (subdiv_ccg->has_mask) {
num_floats += 1;
}
return sizeof(float) * num_floats;
}
SubdivCCG *BKE_subdiv_to_ccg(
Subdiv *UNUSED(subdiv),
const SubdivToCCGSettings *settings,
const Mesh *UNUSED(coarse_mesh))
{
SubdivCCG *subdiv_ccg = MEM_callocN(sizeof(SubdivCCG *), "subdiv ccg");
subdiv_ccg->level = settings->resolution >> 1;
subdiv_ccg->grid_size =
grid_size_for_level_get(subdiv_ccg, subdiv_ccg->level);
subdiv_ccg_init_layers(subdiv_ccg, settings);
return NULL;
}
void BKE_subdiv_ccg_destroy(SubdivCCG *subdiv_ccg)
{
MEM_SAFE_FREE(subdiv_ccg->grids);
MEM_SAFE_FREE(subdiv_ccg->edges);
MEM_SAFE_FREE(subdiv_ccg->vertices);
MEM_freeN(subdiv_ccg);
}
void BKE_subdiv_ccg_key(CCGKey *key, const SubdivCCG *subdiv_ccg, int level)
{
key->level = level;
key->elem_size = element_size_get(subdiv_ccg);
key->grid_size = grid_size_for_level_get(subdiv_ccg, level);
key->grid_area = key->grid_size * key->grid_size;
key->grid_bytes = key->elem_size * key->grid_area;
key->normal_offset = subdiv_ccg->normal_offset;
key->mask_offset = subdiv_ccg->mask_offset;
key->has_normals = subdiv_ccg->has_normal;
key->has_mask = subdiv_ccg->has_mask;
}
void BKE_subdiv_ccg_key_top_level(CCGKey *key, const SubdivCCG *subdiv_ccg)
{
BKE_subdiv_ccg_key(key, subdiv_ccg, subdiv_ccg->level);
}
|
