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
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
#include "BKE_attribute_access.hh"
#include "BKE_attribute_math.hh"
#include "BKE_mesh_runtime.h"
#include "BKE_mesh_sample.hh"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
namespace blender::bke::mesh_surface_sample {
template<typename T>
BLI_NOINLINE static void sample_point_attribute(const Mesh &mesh,
const Span<int> looptri_indices,
const Span<float3> bary_coords,
const VArray<T> &data_in,
const IndexMask mask,
const MutableSpan<T> data_out)
{
const Span<MLoopTri> looptris{BKE_mesh_runtime_looptri_ensure(&mesh),
BKE_mesh_runtime_looptri_len(&mesh)};
for (const int i : mask) {
const int looptri_index = looptri_indices[i];
const MLoopTri &looptri = looptris[looptri_index];
const float3 &bary_coord = bary_coords[i];
const int v0_index = mesh.mloop[looptri.tri[0]].v;
const int v1_index = mesh.mloop[looptri.tri[1]].v;
const int v2_index = mesh.mloop[looptri.tri[2]].v;
const T v0 = data_in[v0_index];
const T v1 = data_in[v1_index];
const T v2 = data_in[v2_index];
const T interpolated_value = attribute_math::mix3(bary_coord, v0, v1, v2);
data_out[i] = interpolated_value;
}
}
void sample_point_attribute(const Mesh &mesh,
const Span<int> looptri_indices,
const Span<float3> bary_coords,
const GVArray &data_in,
const IndexMask mask,
const GMutableSpan data_out)
{
BLI_assert(data_in.size() == mesh.totvert);
BLI_assert(data_in.type() == data_out.type());
const CPPType &type = data_in.type();
attribute_math::convert_to_static_type(type, [&](auto dummy) {
using T = decltype(dummy);
sample_point_attribute<T>(
mesh, looptri_indices, bary_coords, data_in.typed<T>(), mask, data_out.typed<T>());
});
}
template<typename T>
BLI_NOINLINE static void sample_corner_attribute(const Mesh &mesh,
const Span<int> looptri_indices,
const Span<float3> bary_coords,
const VArray<T> &data_in,
const IndexMask mask,
const MutableSpan<T> data_out)
{
const Span<MLoopTri> looptris{BKE_mesh_runtime_looptri_ensure(&mesh),
BKE_mesh_runtime_looptri_len(&mesh)};
for (const int i : mask) {
const int looptri_index = looptri_indices[i];
const MLoopTri &looptri = looptris[looptri_index];
const float3 &bary_coord = bary_coords[i];
const int loop_index_0 = looptri.tri[0];
const int loop_index_1 = looptri.tri[1];
const int loop_index_2 = looptri.tri[2];
const T v0 = data_in[loop_index_0];
const T v1 = data_in[loop_index_1];
const T v2 = data_in[loop_index_2];
const T interpolated_value = attribute_math::mix3(bary_coord, v0, v1, v2);
data_out[i] = interpolated_value;
}
}
void sample_corner_attribute(const Mesh &mesh,
const Span<int> looptri_indices,
const Span<float3> bary_coords,
const GVArray &data_in,
const IndexMask mask,
const GMutableSpan data_out)
{
BLI_assert(data_in.size() == mesh.totloop);
BLI_assert(data_in.type() == data_out.type());
const CPPType &type = data_in.type();
attribute_math::convert_to_static_type(type, [&](auto dummy) {
using T = decltype(dummy);
sample_corner_attribute<T>(
mesh, looptri_indices, bary_coords, data_in.typed<T>(), mask, data_out.typed<T>());
});
}
template<typename T>
void sample_face_attribute(const Mesh &mesh,
const Span<int> looptri_indices,
const VArray<T> &data_in,
const IndexMask mask,
const MutableSpan<T> data_out)
{
const Span<MLoopTri> looptris{BKE_mesh_runtime_looptri_ensure(&mesh),
BKE_mesh_runtime_looptri_len(&mesh)};
for (const int i : mask) {
const int looptri_index = looptri_indices[i];
const MLoopTri &looptri = looptris[looptri_index];
const int poly_index = looptri.poly;
data_out[i] = data_in[poly_index];
}
}
void sample_face_attribute(const Mesh &mesh,
const Span<int> looptri_indices,
const GVArray &data_in,
const IndexMask mask,
const GMutableSpan data_out)
{
BLI_assert(data_in.size() == mesh.totpoly);
BLI_assert(data_in.type() == data_out.type());
const CPPType &type = data_in.type();
attribute_math::convert_to_static_type(type, [&](auto dummy) {
using T = decltype(dummy);
sample_face_attribute<T>(mesh, looptri_indices, data_in.typed<T>(), mask, data_out.typed<T>());
});
}
MeshAttributeInterpolator::MeshAttributeInterpolator(const Mesh *mesh,
const IndexMask mask,
const Span<float3> positions,
const Span<int> looptri_indices)
: mesh_(mesh), mask_(mask), positions_(positions), looptri_indices_(looptri_indices)
{
BLI_assert(positions.size() == looptri_indices.size());
}
Span<float3> MeshAttributeInterpolator::ensure_barycentric_coords()
{
if (!bary_coords_.is_empty()) {
BLI_assert(bary_coords_.size() >= mask_.min_array_size());
return bary_coords_;
}
bary_coords_.reinitialize(mask_.min_array_size());
const Span<MLoopTri> looptris{BKE_mesh_runtime_looptri_ensure(mesh_),
BKE_mesh_runtime_looptri_len(mesh_)};
for (const int i : mask_) {
const int looptri_index = looptri_indices_[i];
const MLoopTri &looptri = looptris[looptri_index];
const int v0_index = mesh_->mloop[looptri.tri[0]].v;
const int v1_index = mesh_->mloop[looptri.tri[1]].v;
const int v2_index = mesh_->mloop[looptri.tri[2]].v;
interp_weights_tri_v3(bary_coords_[i],
mesh_->mvert[v0_index].co,
mesh_->mvert[v1_index].co,
mesh_->mvert[v2_index].co,
positions_[i]);
}
return bary_coords_;
}
Span<float3> MeshAttributeInterpolator::ensure_nearest_weights()
{
if (!nearest_weights_.is_empty()) {
BLI_assert(nearest_weights_.size() >= mask_.min_array_size());
return nearest_weights_;
}
nearest_weights_.reinitialize(mask_.min_array_size());
const Span<MLoopTri> looptris{BKE_mesh_runtime_looptri_ensure(mesh_),
BKE_mesh_runtime_looptri_len(mesh_)};
for (const int i : mask_) {
const int looptri_index = looptri_indices_[i];
const MLoopTri &looptri = looptris[looptri_index];
const int v0_index = mesh_->mloop[looptri.tri[0]].v;
const int v1_index = mesh_->mloop[looptri.tri[1]].v;
const int v2_index = mesh_->mloop[looptri.tri[2]].v;
const float d0 = len_squared_v3v3(positions_[i], mesh_->mvert[v0_index].co);
const float d1 = len_squared_v3v3(positions_[i], mesh_->mvert[v1_index].co);
const float d2 = len_squared_v3v3(positions_[i], mesh_->mvert[v2_index].co);
nearest_weights_[i] = MIN3_PAIR(d0, d1, d2, float3(1, 0, 0), float3(0, 1, 0), float3(0, 0, 1));
}
return nearest_weights_;
}
void MeshAttributeInterpolator::sample_data(const GVArray &src,
const AttributeDomain domain,
const eAttributeMapMode mode,
const GMutableSpan dst)
{
if (src.is_empty() || dst.is_empty()) {
return;
}
/* Compute barycentric coordinates only when they are needed. */
Span<float3> weights;
if (ELEM(domain, ATTR_DOMAIN_POINT, ATTR_DOMAIN_CORNER)) {
switch (mode) {
case eAttributeMapMode::INTERPOLATED:
weights = ensure_barycentric_coords();
break;
case eAttributeMapMode::NEAREST:
weights = ensure_nearest_weights();
break;
}
}
/* Interpolate the source attributes on the surface. */
switch (domain) {
case ATTR_DOMAIN_POINT: {
sample_point_attribute(*mesh_, looptri_indices_, weights, src, mask_, dst);
break;
}
case ATTR_DOMAIN_FACE: {
sample_face_attribute(*mesh_, looptri_indices_, src, mask_, dst);
break;
}
case ATTR_DOMAIN_CORNER: {
sample_corner_attribute(*mesh_, looptri_indices_, weights, src, mask_, dst);
break;
}
case ATTR_DOMAIN_EDGE: {
/* Not yet supported. */
break;
}
default: {
BLI_assert_unreachable();
break;
}
}
}
void MeshAttributeInterpolator::sample_attribute(const ReadAttributeLookup &src_attribute,
OutputAttribute &dst_attribute,
eAttributeMapMode mode)
{
if (src_attribute && dst_attribute) {
this->sample_data(src_attribute.varray, src_attribute.domain, mode, dst_attribute.as_span());
}
}
} // namespace blender::bke::mesh_surface_sample
|
