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
|
//
// Copyright 2021 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
// names, trademarks, service marks, or product names of the Licensor
// and its affiliates, except as required to comply with Section 4(c) of
// the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#include "bfrSurfaceEvaluator.h"
template <typename REAL>
BfrSurfaceEvaluator<REAL>::BfrSurfaceEvaluator(
Far::TopologyRefiner const & baseMesh,
Vec3Vector const & basePos,
Vec3Vector const & baseUVs,
FactoryOptions const & factoryOptions) :
_baseMesh(baseMesh),
_baseMeshPos(basePos),
_baseMeshUVs(baseUVs),
_factory(baseMesh, factoryOptions) {
}
template <typename REAL>
bool
BfrSurfaceEvaluator<REAL>::FaceHasLimit(IndexType baseFace) const {
return _factory.FaceHasLimitSurface(baseFace);
}
template <typename REAL>
void
BfrSurfaceEvaluator<REAL>::Evaluate(IndexType baseFace,
TessCoordVector const & tessCoords,
EvalResults<REAL> & results) const {
// Allocate vectors for the properties to be evaluated:
int numCoords = (int) tessCoords.size() / 2;
results.Resize(numCoords);
// Create the Surfaces for position and UV (optional) and assert if
// not valid, since a limit surface is expected here. (Note we may
// create the position surface but not actually evaluate it.)
SurfaceType pSurface;
SurfaceType uvSurface;
// Figure out how to get a command line arg here to run both
bool initSeparate = false;
if (initSeparate || !results.evalUV) {
_factory.InitVertexSurface(baseFace, &pSurface);
if (results.evalUV) {
_factory.InitFaceVaryingSurface(baseFace, &uvSurface);
}
} else {
_factory.InitSurfaces(baseFace, &pSurface, &uvSurface);
}
assert(pSurface.IsValid());
assert(uvSurface.IsValid() == results.evalUV);
// Evaluate directly or using stencils:
if (results.useStencils) {
evaluateByStencils(pSurface, uvSurface, tessCoords, results);
} else {
evaluateDirectly(pSurface, uvSurface, tessCoords, results);
}
}
template <typename REAL>
void
BfrSurfaceEvaluator<REAL>::evaluateDirectly(
SurfaceType const & pSurface, SurfaceType const & uvSurface,
TessCoordVector const & tessCoords, EvalResults<REAL> & results) const {
int numCoords = (int) tessCoords.size() / 2;
if (results.evalPosition) {
Vec3Vector baseFacePos(pSurface.GetNumPatchPoints());
REAL const * meshPoints = &_baseMeshPos[0][0];
REAL * patchPoints = &baseFacePos[0][0];
pSurface.PreparePatchPoints(meshPoints, 3, patchPoints, 3);
REAL const * st = &tessCoords[0];
for (int i = 0; i < numCoords; ++i, st += 2) {
if (!results.eval1stDeriv) {
pSurface.Evaluate(st, patchPoints, 3, &results.p[i][0]);
} else if (!results.eval2ndDeriv) {
pSurface.Evaluate(st, patchPoints, 3,
&results.p[i][0], &results.du[i][0], &results.dv[i][0]);
} else {
pSurface.Evaluate(st, patchPoints, 3,
&results.p[i][0], &results.du[i][0], &results.dv[i][0],
&results.duu[i][0], &results.duv[i][0], &results.dvv[i][0]);
}
}
}
if (results.evalUV) {
Vec3Vector baseFaceUVs(uvSurface.GetNumPatchPoints());
REAL const * meshPoints = &_baseMeshUVs[0][0];
REAL * patchPoints = &baseFaceUVs[0][0];
uvSurface.PreparePatchPoints(meshPoints, 3, patchPoints, 3);
REAL const * st = &tessCoords[0];
for (int i = 0; i < numCoords; ++i, st += 2) {
uvSurface.Evaluate(st, patchPoints, 3, &results.uv[i][0]);
}
}
}
template <typename REAL>
void
BfrSurfaceEvaluator<REAL>::evaluateByStencils(
SurfaceType const & pSurface, SurfaceType const & uvSurface,
TessCoordVector const & tessCoords, EvalResults<REAL> & results) const {
std::vector<REAL> stencilWeights;
int numCoords = (int) tessCoords.size() / 2;
if (results.evalPosition) {
stencilWeights.resize(6 * pSurface.GetNumControlPoints());
REAL * sP = &stencilWeights[0];
REAL * sDu = sP + pSurface.GetNumControlPoints();
REAL * sDv = sDu + pSurface.GetNumControlPoints();
REAL * sDuu = sDv + pSurface.GetNumControlPoints();
REAL * sDuv = sDuu + pSurface.GetNumControlPoints();
REAL * sDvv = sDuv + pSurface.GetNumControlPoints();
REAL const * st = &tessCoords[0];
for (int i = 0; i < numCoords; ++i, st += 2) {
REAL const * meshPos = &_baseMeshPos[0][0];
if (!results.eval1stDeriv) {
pSurface.EvaluateStencil(st, &sP[0]);
} else if (!results.eval2ndDeriv) {
pSurface.EvaluateStencil(st, &sP[0], &sDu[0], &sDv[0]);
} else {
pSurface.EvaluateStencil(st, &sP[0], &sDu[0], &sDv[0],
&sDuu[0], &sDuv[0], &sDvv[0]);
}
if (results.evalPosition) {
pSurface.ApplyStencilFromMesh(&sP[0], meshPos, 3,
&results.p[i][0]);
}
if (results.eval1stDeriv) {
pSurface.ApplyStencilFromMesh(&sDu[0], meshPos, 3,
&results.du[i][0]);
pSurface.ApplyStencilFromMesh(&sDv[0], meshPos, 3,
&results.dv[i][0]);
}
if (results.eval2ndDeriv) {
pSurface.ApplyStencilFromMesh(&sDuu[0], meshPos, 3,
&results.duu[i][0]);
pSurface.ApplyStencilFromMesh(&sDuv[0], meshPos, 3,
&results.duv[i][0]);
pSurface.ApplyStencilFromMesh(&sDvv[0], meshPos, 3,
&results.dvv[i][0]);
}
}
}
if (results.evalUV) {
REAL const * meshUVs = &_baseMeshUVs[0][0];
stencilWeights.resize(uvSurface.GetNumControlPoints());
REAL * sUV = &stencilWeights[0];
REAL const * st = &tessCoords[0];
for (int i = 0; i < numCoords; ++i, st += 2) {
uvSurface.EvaluateStencil(st, &sUV[0]);
uvSurface.ApplyStencilFromMesh(&sUV[0], meshUVs, 3,
&results.uv[i][0]);
}
}
}
//
// Explicit instantiation for float and double:
//
template class BfrSurfaceEvaluator<float>;
template class BfrSurfaceEvaluator<double>;
|
