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
|
/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2021 Blender Foundation. All rights reserved. */
/** \file
* \ingroup draw
*/
#include "MEM_guardedalloc.h"
#include "BKE_deform.h"
#include "draw_subdivision.h"
#include "extract_mesh.h"
namespace blender::draw {
/* ---------------------------------------------------------------------- */
/** \name Extract Vertex Weight
* \{ */
struct MeshExtract_Weight_Data {
float *vbo_data;
const DRW_MeshWeightState *wstate;
const MDeformVert *dvert; /* For #Mesh. */
int cd_ofs; /* For #BMesh. */
};
static float evaluate_vertex_weight(const MDeformVert *dvert, const DRW_MeshWeightState *wstate)
{
/* Error state. */
if ((wstate->defgroup_active < 0) && (wstate->defgroup_len > 0)) {
return -2.0f;
}
if (dvert == nullptr) {
return (wstate->alert_mode != OB_DRAW_GROUPUSER_NONE) ? -1.0f : 0.0f;
}
float input = 0.0f;
if (wstate->flags & DRW_MESH_WEIGHT_STATE_MULTIPAINT) {
/* Multi-Paint feature */
bool is_normalized = (wstate->flags & (DRW_MESH_WEIGHT_STATE_AUTO_NORMALIZE |
DRW_MESH_WEIGHT_STATE_LOCK_RELATIVE));
input = BKE_defvert_multipaint_collective_weight(dvert,
wstate->defgroup_len,
wstate->defgroup_sel,
wstate->defgroup_sel_count,
is_normalized);
/* make it black if the selected groups have no weight on a vertex */
if (input == 0.0f) {
return -1.0f;
}
}
else {
/* default, non tricky behavior */
input = BKE_defvert_find_weight(dvert, wstate->defgroup_active);
if (input == 0.0f) {
switch (wstate->alert_mode) {
case OB_DRAW_GROUPUSER_ACTIVE:
return -1.0f;
break;
case OB_DRAW_GROUPUSER_ALL:
if (BKE_defvert_is_weight_zero(dvert, wstate->defgroup_len)) {
return -1.0f;
}
break;
}
}
}
/* Lock-Relative: display the fraction of current weight vs total unlocked weight. */
if (wstate->flags & DRW_MESH_WEIGHT_STATE_LOCK_RELATIVE) {
input = BKE_defvert_lock_relative_weight(
input, dvert, wstate->defgroup_len, wstate->defgroup_locked, wstate->defgroup_unlocked);
}
CLAMP(input, 0.0f, 1.0f);
return input;
}
static void extract_weights_init(const MeshRenderData *mr,
struct MeshBatchCache *cache,
void *buf,
void *tls_data)
{
GPUVertBuf *vbo = static_cast<GPUVertBuf *>(buf);
static GPUVertFormat format = {0};
if (format.attr_len == 0) {
GPU_vertformat_attr_add(&format, "weight", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
}
GPU_vertbuf_init_with_format(vbo, &format);
GPU_vertbuf_data_alloc(vbo, mr->loop_len + mr->loop_loose_len);
MeshExtract_Weight_Data *data = static_cast<MeshExtract_Weight_Data *>(tls_data);
data->vbo_data = (float *)GPU_vertbuf_get_data(vbo);
data->wstate = &cache->weight_state;
if (data->wstate->defgroup_active == -1) {
/* Nothing to show. */
data->dvert = nullptr;
data->cd_ofs = -1;
}
else if (mr->extract_type == MR_EXTRACT_BMESH) {
data->dvert = nullptr;
data->cd_ofs = CustomData_get_offset(&mr->bm->vdata, CD_MDEFORMVERT);
}
else {
data->dvert = (const MDeformVert *)CustomData_get_layer(&mr->me->vdata, CD_MDEFORMVERT);
data->cd_ofs = -1;
}
}
static void extract_weights_iter_poly_bm(const MeshRenderData *UNUSED(mr),
const BMFace *f,
const int UNUSED(f_index),
void *_data)
{
MeshExtract_Weight_Data *data = static_cast<MeshExtract_Weight_Data *>(_data);
BMLoop *l_iter, *l_first;
l_iter = l_first = BM_FACE_FIRST_LOOP(f);
do {
const int l_index = BM_elem_index_get(l_iter);
if (data->cd_ofs != -1) {
const MDeformVert *dvert = (const MDeformVert *)BM_ELEM_CD_GET_VOID_P(l_iter->v,
data->cd_ofs);
data->vbo_data[l_index] = evaluate_vertex_weight(dvert, data->wstate);
}
else {
data->vbo_data[l_index] = evaluate_vertex_weight(nullptr, data->wstate);
}
} while ((l_iter = l_iter->next) != l_first);
}
static void extract_weights_iter_poly_mesh(const MeshRenderData *mr,
const MPoly *mp,
const int UNUSED(mp_index),
void *_data)
{
MeshExtract_Weight_Data *data = static_cast<MeshExtract_Weight_Data *>(_data);
const MLoop *mloop = mr->mloop;
const int ml_index_end = mp->loopstart + mp->totloop;
for (int ml_index = mp->loopstart; ml_index < ml_index_end; ml_index += 1) {
const MLoop *ml = &mloop[ml_index];
if (data->dvert != nullptr) {
const MDeformVert *dvert = &data->dvert[ml->v];
data->vbo_data[ml_index] = evaluate_vertex_weight(dvert, data->wstate);
}
else {
const MDeformVert *dvert = nullptr;
data->vbo_data[ml_index] = evaluate_vertex_weight(dvert, data->wstate);
}
}
}
static void extract_weights_init_subdiv(const DRWSubdivCache *subdiv_cache,
const MeshRenderData *UNUSED(mr),
struct MeshBatchCache *cache,
void *buffer,
void *UNUSED(data))
{
Mesh *coarse_mesh = subdiv_cache->mesh;
GPUVertBuf *vbo = static_cast<GPUVertBuf *>(buffer);
static GPUVertFormat format = {0};
if (format.attr_len == 0) {
GPU_vertformat_attr_add(&format, "weight", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
}
GPU_vertbuf_init_build_on_device(vbo, &format, subdiv_cache->num_subdiv_loops);
GPUVertBuf *coarse_weights = GPU_vertbuf_calloc();
GPU_vertbuf_init_with_format(coarse_weights, &format);
GPU_vertbuf_data_alloc(coarse_weights, coarse_mesh->totloop);
float *coarse_weights_data = static_cast<float *>(GPU_vertbuf_get_data(coarse_weights));
const DRW_MeshWeightState *wstate = &cache->weight_state;
const MDeformVert *dverts = static_cast<const MDeformVert *>(
CustomData_get_layer(&coarse_mesh->vdata, CD_MDEFORMVERT));
for (int i = 0; i < coarse_mesh->totpoly; i++) {
const MPoly *mpoly = &coarse_mesh->mpoly[i];
for (int loop_index = mpoly->loopstart; loop_index < mpoly->loopstart + mpoly->totloop;
loop_index++) {
const MLoop *ml = &coarse_mesh->mloop[loop_index];
if (dverts != nullptr) {
const MDeformVert *dvert = &dverts[ml->v];
coarse_weights_data[loop_index] = evaluate_vertex_weight(dvert, wstate);
}
else {
coarse_weights_data[loop_index] = evaluate_vertex_weight(nullptr, wstate);
}
}
}
draw_subdiv_interp_custom_data(subdiv_cache, coarse_weights, vbo, 1, 0);
GPU_vertbuf_discard(coarse_weights);
}
constexpr MeshExtract create_extractor_weights()
{
MeshExtract extractor = {nullptr};
extractor.init = extract_weights_init;
extractor.init_subdiv = extract_weights_init_subdiv;
extractor.iter_poly_bm = extract_weights_iter_poly_bm;
extractor.iter_poly_mesh = extract_weights_iter_poly_mesh;
extractor.data_type = MR_DATA_NONE;
extractor.data_size = sizeof(MeshExtract_Weight_Data);
extractor.use_threading = true;
extractor.mesh_buffer_offset = offsetof(MeshBufferList, vbo.weights);
return extractor;
}
/** \} */
} // namespace blender::draw
extern "C" {
const MeshExtract extract_weights = blender::draw::create_extractor_weights();
}
|
