OpenSubdiv: opensubdiv/sdc/catmarkScheme.h Source File

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catmarkScheme.h
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1//
2// Copyright 2014 DreamWorks Animation LLC.
3//
4// Licensed under the Apache License, Version 2.0 (the "Apache License")
5// with the following modification; you may not use this file except in
6// compliance with the Apache License and the following modification to it:
7// Section 6. Trademarks. is deleted and replaced with:
8//
9// 6. Trademarks. This License does not grant permission to use the trade
10// names, trademarks, service marks, or product names of the Licensor
11// and its affiliates, except as required to comply with Section 4(c) of
12// the License and to reproduce the content of the NOTICE file.
13//
14// You may obtain a copy of the Apache License at
15//
16// http://www.apache.org/licenses/LICENSE-2.0
17//
18// Unless required by applicable law or agreed to in writing, software
19// distributed under the Apache License with the above modification is
20// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
21// KIND, either express or implied. See the Apache License for the specific
22// language governing permissions and limitations under the Apache License.
23//
24#ifndef OPENSUBDIV3_SDC_CATMARK_SCHEME_H
25#define OPENSUBDIV3_SDC_CATMARK_SCHEME_H
26
27#include "../version.h"
28
29#include "../sdc/scheme.h"
30
31#include <cassert>
32#include <cmath>
33
34namespace OpenSubdiv {
35namespace OPENSUBDIV_VERSION {
36
37namespace Sdc {
38
39//
40// Specializations for Scheme<SCHEME_CATMARK>:
41//
42
43//
44// Catmark traits:
45//
46template <>
47 inline Split Scheme<SCHEME_CATMARK>::GetTopologicalSplitType() { return SPLIT_TO_QUADS; }
48
49template <>
50 inline int Scheme<SCHEME_CATMARK>::GetRegularFaceSize() { return 4; }
51
52template <>
53 inline int Scheme<SCHEME_CATMARK>::GetRegularVertexValence() { return 4; }
54
55template <>
56 inline int Scheme<SCHEME_CATMARK>::GetLocalNeighborhoodSize() { return 1; }
57
58
59//
60// Masks for edge-vertices: the hard Crease mask does not need to be specialized
61// (simply the midpoint), so all that is left is the Smooth case:
62//
63// The Smooth mask is complicated by the need to support the "triangle subdivision"
64// option, which applies different weighting in the presence of triangles. It is
65// up for debate as to whether this is useful or not -- we may be able to deprecate
66// this option.
67//
68template <>
69template <typename EDGE, typename MASK>
70inline void
71 Scheme<SCHEME_CATMARK>::assignSmoothMaskForEdge(EDGE const& edge, MASK& mask) const {
72
73 typedef typename MASK::Weight Weight;
74
75 int faceCount = edge.GetNumFaces();
76
77 mask.SetNumVertexWeights(2);
78 mask.SetNumEdgeWeights(0);
79 mask.SetNumFaceWeights(faceCount);
80 mask.SetFaceWeightsForFaceCenters(true);
81
82 //
83 // Determine if we need to inspect incident faces and apply alternate weighting for
84 // triangles -- and if so, determine which of the two are triangles.
85 //
86 bool face0IsTri = false;
87 bool face1IsTri = false;
88 bool useTriangleOption = (_options.GetTriangleSubdivision() == Options::TRI_SUB_SMOOTH);
89 if (useTriangleOption) {
90 if (faceCount == 2) {
91 //
92 // Ideally we want to avoid this inspection when we have already subdivided at
93 // least once -- need something in the Edge interface to help avoid this, e.g.
94 // an IsRegular() query, the subdivision level...
95 //
96 int vertsPerFace[2];
97 edge.GetNumVerticesPerFace(vertsPerFace);
98
99 face0IsTri = (vertsPerFace[0] == 3);
100 face1IsTri = (vertsPerFace[1] == 3);
101 useTriangleOption = face0IsTri || face1IsTri;
102 } else {
103 useTriangleOption = false;
104 }
105 }
106
107 if (! useTriangleOption) {
108 mask.VertexWeight(0) = 0.25f;
109 mask.VertexWeight(1) = 0.25f;
110
111 if (faceCount == 2) {
112 mask.FaceWeight(0) = 0.25f;
113 mask.FaceWeight(1) = 0.25f;
114 } else {
115 Weight fWeight = 0.5f / (Weight)faceCount;
116 for (int i = 0; i < faceCount; ++i) {
117 mask.FaceWeight(i) = fWeight;
118 }
119 }
120 } else {
121 //
122 // This mimics the implementation in Hbr in terms of order of operations.
123 //
124 const Weight CATMARK_SMOOTH_TRI_EDGE_WEIGHT = (Weight) 0.470;
125
126 Weight f0Weight = face0IsTri ? CATMARK_SMOOTH_TRI_EDGE_WEIGHT : 0.25f;
127 Weight f1Weight = face1IsTri ? CATMARK_SMOOTH_TRI_EDGE_WEIGHT : 0.25f;
128
129 Weight fWeight = 0.5f * (f0Weight + f1Weight);
130 Weight vWeight = 0.5f * (1.0f - 2.0f * fWeight);
131
132 mask.VertexWeight(0) = vWeight;
133 mask.VertexWeight(1) = vWeight;
134
135 mask.FaceWeight(0) = fWeight;
136 mask.FaceWeight(1) = fWeight;
137 }
138}
139
140
141//
142// Masks for vertex-vertices: the hard Corner mask does not need to be specialized
143// (simply the vertex itself), leaving the Crease and Smooth cases (Dart is smooth):
144//
145template <>
146template <typename VERTEX, typename MASK>
147inline void
148 Scheme<SCHEME_CATMARK>::assignCreaseMaskForVertex(VERTEX const& vertex, MASK& mask,
149 int const creaseEnds[2]) const {
150 typedef typename MASK::Weight Weight;
151
152 int valence = vertex.GetNumEdges();
153
154 mask.SetNumVertexWeights(1);
155 mask.SetNumEdgeWeights(valence);
156 mask.SetNumFaceWeights(0);
157 mask.SetFaceWeightsForFaceCenters(false);
158
159 Weight vWeight = 0.75f;
160 Weight eWeight = 0.125f;
161
162 mask.VertexWeight(0) = vWeight;
163 for (int i = 0; i < valence; ++i) {
164 mask.EdgeWeight(i) = 0.0f;
165 }
166 mask.EdgeWeight(creaseEnds[0]) = eWeight;
167 mask.EdgeWeight(creaseEnds[1]) = eWeight;
168}
169
170template <>
171template <typename VERTEX, typename MASK>
172inline void
173 Scheme<SCHEME_CATMARK>::assignSmoothMaskForVertex(VERTEX const& vertex, MASK& mask) const {
174
175 typedef typename MASK::Weight Weight;
176
177 //
178 // A Smooth vertex must be manifold and interior -- manifold boundary vertices will be
179 // Creases and non-manifold vertices of any kind will be Corners or Creases. If smooth
180 // rules for non-manifold vertices are ever defined, this will need adjusting:
181 //
182 assert(vertex.GetNumFaces() == vertex.GetNumEdges());
183
184 int valence = vertex.GetNumFaces();
185
186 mask.SetNumVertexWeights(1);
187 mask.SetNumEdgeWeights(valence);
188 mask.SetNumFaceWeights(valence);
189 mask.SetFaceWeightsForFaceCenters(true);
190
191 Weight vWeight = (Weight)(valence - 2) / (Weight)valence;
192 Weight fWeight = 1.0f / (Weight)(valence * valence);
193 Weight eWeight = fWeight;
194
195 mask.VertexWeight(0) = vWeight;
196 for (int i = 0; i < valence; ++i) {
197 mask.EdgeWeight(i) = eWeight;
198 mask.FaceWeight(i) = fWeight;
199 }
200}
201
202//
203// Limit masks for position:
204//
205template <>
206template <typename VERTEX, typename MASK>
207inline void
208 Scheme<SCHEME_CATMARK>::assignCornerLimitMask(VERTEX const& /* vertex */, MASK& posMask) const {
209
210 posMask.SetNumVertexWeights(1);
211 posMask.SetNumEdgeWeights(0);
212 posMask.SetNumFaceWeights(0);
213 posMask.SetFaceWeightsForFaceCenters(false);
214
215 posMask.VertexWeight(0) = 1.0f;
216}
217
218template <>
219template <typename VERTEX, typename MASK>
220inline void
221 Scheme<SCHEME_CATMARK>::assignCreaseLimitMask(VERTEX const& vertex, MASK& posMask,
222 int const creaseEnds[2]) const {
223
224 typedef typename MASK::Weight Weight;
225
226 int valence = vertex.GetNumEdges();
227
228 posMask.SetNumVertexWeights(1);
229 posMask.SetNumEdgeWeights(valence);
230 posMask.SetNumFaceWeights(0);
231 posMask.SetFaceWeightsForFaceCenters(false);
232
233 Weight vWeight = (Weight)(2.0 / 3.0);
234 Weight eWeight = (Weight)(1.0 / 6.0);
235
236 posMask.VertexWeight(0) = vWeight;
237 for (int i = 0; i < valence; ++i) {
238 posMask.EdgeWeight(i) = 0.0f;
239 }
240 posMask.EdgeWeight(creaseEnds[0]) = eWeight;
241 posMask.EdgeWeight(creaseEnds[1]) = eWeight;
242}
243
244template <>
245template <typename VERTEX, typename MASK>
246inline void
247 Scheme<SCHEME_CATMARK>::assignSmoothLimitMask(VERTEX const& vertex, MASK& posMask) const {
248
249 typedef typename MASK::Weight Weight;
250
251 int valence = vertex.GetNumFaces();
252 if (valence == 2) {
253 assignCornerLimitMask(vertex, posMask);
254 return;
255 }
256
257 posMask.SetNumVertexWeights(1);
258 posMask.SetNumEdgeWeights(valence);
259 posMask.SetNumFaceWeights(valence);
260 posMask.SetFaceWeightsForFaceCenters(false);
261
262 // Specialize for the regular case:
263 if (valence == 4) {
264 Weight fWeight = (Weight)(1.0 / 36.0);
265 Weight eWeight = (Weight)(1.0 / 9.0);
266 Weight vWeight = (Weight)(4.0 / 9.0);
267
268 posMask.VertexWeight(0) = vWeight;
269
270 posMask.EdgeWeight(0) = eWeight;
271 posMask.EdgeWeight(1) = eWeight;
272 posMask.EdgeWeight(2) = eWeight;
273 posMask.EdgeWeight(3) = eWeight;
274
275 posMask.FaceWeight(0) = fWeight;
276 posMask.FaceWeight(1) = fWeight;
277 posMask.FaceWeight(2) = fWeight;
278 posMask.FaceWeight(3) = fWeight;
279 } else {
280 Weight Valence = (Weight) valence;
281
282 Weight fWeight = 1.0f / (Valence * (Valence + 5.0f));
283 Weight eWeight = 4.0f * fWeight;
284 Weight vWeight = 1.0f - Valence * (eWeight + fWeight);
285
286 posMask.VertexWeight(0) = vWeight;
287 for (int i = 0; i < valence; ++i) {
288 posMask.EdgeWeight(i) = eWeight;
289 posMask.FaceWeight(i) = fWeight;
290 }
291 }
292}
293
294//
295// Limit masks for tangents -- these are stubs for now, or have a temporary
296// implementation
297//
298template <>
299template <typename VERTEX, typename MASK>
300inline void
301 Scheme<SCHEME_CATMARK>::assignCornerLimitTangentMasks(VERTEX const& vertex,
302 MASK& tan1Mask, MASK& tan2Mask) const {
303
304 int valence = vertex.GetNumEdges();
305
306 tan1Mask.SetNumVertexWeights(1);
307 tan1Mask.SetNumEdgeWeights(valence);
308 tan1Mask.SetNumFaceWeights(0);
309 tan1Mask.SetFaceWeightsForFaceCenters(false);
310
311 tan2Mask.SetNumVertexWeights(1);
312 tan2Mask.SetNumEdgeWeights(valence);
313 tan2Mask.SetNumFaceWeights(0);
314 tan2Mask.SetFaceWeightsForFaceCenters(false);
315
316 // Should be at least 2 edges -- be sure to clear weights for any more:
317 tan1Mask.VertexWeight(0) = -1.0f;
318 tan1Mask.EdgeWeight(0) = 1.0f;
319 tan1Mask.EdgeWeight(1) = 0.0f;
320
321 tan2Mask.VertexWeight(0) = -1.0f;
322 tan2Mask.EdgeWeight(0) = 0.0f;
323 tan2Mask.EdgeWeight(1) = 1.0f;
324
325 for (int i = 2; i < valence; ++i) {
326 tan1Mask.EdgeWeight(i) = 0.0f;
327 tan2Mask.EdgeWeight(i) = 0.0f;
328 }
329}
330
331template <>
332template <typename VERTEX, typename MASK>
333inline void
334 Scheme<SCHEME_CATMARK>::assignCreaseLimitTangentMasks(VERTEX const& vertex,
335 MASK& tan1Mask, MASK& tan2Mask, int const creaseEnds[2]) const {
336
337 typedef typename MASK::Weight Weight;
338
339 //
340 // First, the tangent along the crease:
341 // The first crease edge is considered the "leading" edge of the span
342 // of surface for which we are evaluating tangents and the second edge the
343 // "trailing edge". By convention, the tangent along the crease is oriented
344 // in the direction of the leading edge.
345 //
346 int numEdges = vertex.GetNumEdges();
347 int numFaces = vertex.GetNumFaces();
348
349 tan1Mask.SetNumVertexWeights(1);
350 tan1Mask.SetNumEdgeWeights(numEdges);
351 tan1Mask.SetNumFaceWeights(numFaces);
352 tan1Mask.SetFaceWeightsForFaceCenters(false);
353
354 tan1Mask.VertexWeight(0) = 0.0f;
355 for (int i = 0; i < numEdges; ++i) {
356 tan1Mask.EdgeWeight(i) = 0.0f;
357 }
358 for (int i = 0; i < numFaces; ++i) {
359 tan1Mask.FaceWeight(i) = 0.0f;
360 }
361
362 tan1Mask.EdgeWeight(creaseEnds[0]) = 0.5f;
363 tan1Mask.EdgeWeight(creaseEnds[1]) = -0.5f;
364
365 //
366 // Second, the tangent across the interior faces:
367 // Note this is ambiguous for an interior vertex. We currently return
368 // the tangent for the surface in the counter-clockwise span between the
369 // leading and trailing edges that form the crease. Given the expected
370 // computation of a surface normal as Tan1 X Tan2, this tangent should be
371 // oriented "inward" from the crease/boundary -- across the surface rather
372 // than outward and away from it.
373 //
374 tan2Mask.SetNumVertexWeights(1);
375 tan2Mask.SetNumEdgeWeights(numEdges);
376 tan2Mask.SetNumFaceWeights(numFaces);
377 tan2Mask.SetFaceWeightsForFaceCenters(false);
378
379 // Prepend weights of 0 preceding the crease:
380 for (int i = 0; i < creaseEnds[0]; ++i) {
381 tan2Mask.EdgeWeight(i) = 0.0f;
382 tan2Mask.FaceWeight(i) = 0.0f;
383 }
384
385 // Assign weights to crease edge and interior points:
386 int interiorEdgeCount = creaseEnds[1] - creaseEnds[0] - 1;
387 if (interiorEdgeCount == 1) {
388 // The regular case -- uniform B-spline cross-tangent:
389
390 tan2Mask.VertexWeight(0) = (Weight)(-4.0 / 6.0);
391
392 tan2Mask.EdgeWeight(creaseEnds[0]) = (Weight)(-1.0 / 6.0);
393 tan2Mask.EdgeWeight(creaseEnds[0] + 1) = (Weight)( 4.0 / 6.0);
394 tan2Mask.EdgeWeight(creaseEnds[1]) = (Weight)(-1.0 / 6.0);
395
396 tan2Mask.FaceWeight(creaseEnds[0]) = (Weight)(1.0 / 6.0);
397 tan2Mask.FaceWeight(creaseEnds[0] + 1) = (Weight)(1.0 / 6.0);
398 } else if (interiorEdgeCount > 1) {
399 // The irregular case -- formulae from Biermann et al:
400
401 double k = (double) (interiorEdgeCount + 1);
402 double theta = M_PI / k;
403
404 double cosTheta = std::cos(theta);
405 double sinTheta = std::sin(theta);
406
407 // Loop/Schaefer use a different divisor here (3*k + cos(theta)):
408 double commonDenom = 1.0f / (k * (3.0f + cosTheta));
409 double R = (cosTheta + 1.0f) / sinTheta;
410
411 double vertexWeight = 4.0f * R * (cosTheta - 1.0f);
412 double creaseWeight = -R * (1.0f + 2.0f * cosTheta);
413
414 tan2Mask.VertexWeight(0) = (Weight) (vertexWeight * commonDenom);
415
416 tan2Mask.EdgeWeight(creaseEnds[0]) = (Weight) (creaseWeight * commonDenom);
417 tan2Mask.EdgeWeight(creaseEnds[1]) = (Weight) (creaseWeight * commonDenom);
418
419 tan2Mask.FaceWeight(creaseEnds[0]) = (Weight) (sinTheta * commonDenom);
420
421 double sinThetaI = 0.0f;
422 double sinThetaIplus1 = sinTheta;
423 for (int i = 1; i < k; ++i) {
424 sinThetaI = sinThetaIplus1;
425 sinThetaIplus1 = std::sin((i+1)*theta);
426
427 tan2Mask.EdgeWeight(creaseEnds[0] + i) = (Weight) ((4.0f * sinThetaI) * commonDenom);
428 tan2Mask.FaceWeight(creaseEnds[0] + i) = (Weight) ((sinThetaI + sinThetaIplus1) * commonDenom);
429 }
430 } else {
431 // Special case for a single face -- simple average of boundary edges:
432
433 tan2Mask.VertexWeight(0) = -6.0f;
434
435 tan2Mask.EdgeWeight(creaseEnds[0]) = 3.0f;
436 tan2Mask.EdgeWeight(creaseEnds[1]) = 3.0f;
437
438 tan2Mask.FaceWeight(creaseEnds[0]) = 0.0f;
439 }
440
441 // Append weights of 0 following the crease:
442 for (int i = creaseEnds[1]; i < numFaces; ++i) {
443 tan2Mask.FaceWeight(i) = 0.0f;
444 }
445 for (int i = creaseEnds[1] + 1; i < numEdges; ++i) {
446 tan2Mask.EdgeWeight(i) = 0.0f;
447 }
448}
449
450template <>
451template <typename VERTEX, typename MASK>
452inline void
453 Scheme<SCHEME_CATMARK>::assignSmoothLimitTangentMasks(VERTEX const& vertex,
454 MASK& tan1Mask, MASK& tan2Mask) const {
455
456 typedef typename MASK::Weight Weight;
457
458 int valence = vertex.GetNumFaces();
459 if (valence == 2) {
460 assignCornerLimitTangentMasks(vertex, tan1Mask, tan2Mask);
461 return;
462 }
463
464 // Compute tan1 initially -- tan2 is simply a rotation:
465 tan1Mask.SetNumVertexWeights(1);
466 tan1Mask.SetNumEdgeWeights(valence);
467 tan1Mask.SetNumFaceWeights(valence);
468 tan1Mask.SetFaceWeightsForFaceCenters(false);
469
470 tan1Mask.VertexWeight(0) = 0.0f;
471
472 if (valence == 4) {
473 tan1Mask.EdgeWeight(0) = 4.0f;
474 tan1Mask.EdgeWeight(1) = 0.0f;
475 tan1Mask.EdgeWeight(2) = -4.0f;
476 tan1Mask.EdgeWeight(3) = 0.0f;
477
478 tan1Mask.FaceWeight(0) = 1.0f;
479 tan1Mask.FaceWeight(1) = -1.0f;
480 tan1Mask.FaceWeight(2) = -1.0f;
481 tan1Mask.FaceWeight(3) = 1.0f;
482 } else {
483 double theta = 2.0f * M_PI / (double)valence;
484
485 double cosTheta = std::cos(theta);
486 double cosHalfTheta = std::cos(theta * 0.5f);
487
488 double lambda = (5.0 / 16.0) + (1.0 / 16.0) *
489 (cosTheta + cosHalfTheta * std::sqrt(2.0f * (9.0f + cosTheta)));
490
491 double edgeWeightScale = 4.0f;
492 double faceWeightScale = 1.0f / (4.0f * lambda - 1.0f);
493
494 for (int i = 0; i < valence; ++i) {
495 double cosThetaI = std::cos( i * theta);
496 double cosThetaIplus1 = std::cos((i+1)* theta);
497
498 tan1Mask.EdgeWeight(i) = (Weight) (edgeWeightScale * cosThetaI);
499 tan1Mask.FaceWeight(i) = (Weight) (faceWeightScale * (cosThetaI + cosThetaIplus1));
500 }
501 }
502
503 // Now rotate/copy tan1 weights to tan2:
504 tan2Mask.SetNumVertexWeights(1);
505 tan2Mask.SetNumEdgeWeights(valence);
506 tan2Mask.SetNumFaceWeights(valence);
507 tan2Mask.SetFaceWeightsForFaceCenters(false);
508
509 tan2Mask.VertexWeight(0) = 0.0f;
510 if (valence == 4) {
511 tan2Mask.EdgeWeight(0) = 0.0f;
512 tan2Mask.EdgeWeight(1) = 4.0f;
513 tan2Mask.EdgeWeight(2) = 0.0f;
514 tan2Mask.EdgeWeight(3) = -4.0f;
515
516 tan2Mask.FaceWeight(0) = 1.0f;
517 tan2Mask.FaceWeight(1) = 1.0f;
518 tan2Mask.FaceWeight(2) = -1.0f;
519 tan2Mask.FaceWeight(3) = -1.0f;
520 } else {
521 tan2Mask.EdgeWeight(0) = tan1Mask.EdgeWeight(valence-1);
522 tan2Mask.FaceWeight(0) = tan1Mask.FaceWeight(valence-1);
523 for (int i = 1; i < valence; ++i) {
524 tan2Mask.EdgeWeight(i) = tan1Mask.EdgeWeight(i-1);
525 tan2Mask.FaceWeight(i) = tan1Mask.FaceWeight(i-1);
526 }
527 }
528}
529
530} // end namespace sdc
531
532} // end namespace OPENSUBDIV_VERSION
533using namespace OPENSUBDIV_VERSION;
534} // end namespace OpenSubdiv
535
536#endif /* OPENSUBDIV3_SDC_CATMARK_SCHEME_H */
OpenSubdiv
Definition: limits.h:32
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Split
Split
Enumerated type for all face splitting schemes.
Definition: types.h:47
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::SPLIT_TO_QUADS
@ SPLIT_TO_QUADS
Used by Catmark and Bilinear.
Definition: types.h:48
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Options::TRI_SUB_SMOOTH
@ TRI_SUB_SMOOTH
"smooth triangle" weights (Catmark scheme only)
Definition: options.h:74
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::assignSmoothMaskForEdge
void assignSmoothMaskForEdge(EDGE const &edge, MASK &mask) const
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::GetTopologicalSplitType
static Split GetTopologicalSplitType()
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::assignCreaseMaskForVertex
void assignCreaseMaskForVertex(VERTEX const &edge, MASK &mask, int const creaseEnds[2]) const
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::assignCreaseLimitTangentMasks
void assignCreaseLimitTangentMasks(VERTEX const &vertex, MASK &tan1, MASK &tan2, int const creaseEnds[2]) const
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::GetRegularFaceSize
static int GetRegularFaceSize()
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::assignSmoothLimitMask
void assignSmoothLimitMask(VERTEX const &vertex, MASK &pos) const
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::GetLocalNeighborhoodSize
static int GetLocalNeighborhoodSize()
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::assignCreaseLimitMask
void assignCreaseLimitMask(VERTEX const &vertex, MASK &pos, int const creaseEnds[2]) const
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::assignSmoothMaskForVertex
void assignSmoothMaskForVertex(VERTEX const &edge, MASK &mask) const
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::GetRegularVertexValence
static int GetRegularVertexValence()
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::assignSmoothLimitTangentMasks
void assignSmoothLimitTangentMasks(VERTEX const &vertex, MASK &tan1, MASK &tan2) const
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::assignCornerLimitMask
void assignCornerLimitMask(VERTEX const &vertex, MASK &pos) const
OpenSubdiv::OPENSUBDIV_VERSION::Sdc::Scheme::assignCornerLimitTangentMasks
void assignCornerLimitTangentMasks(VERTEX const &vertex, MASK &tan1, MASK &tan2) const