Ptex: PtexSeparableFilter.cpp Source File

Ptex

- Main Page
- Related Pages
- Namespaces
- Classes
- Files

- File List
- File Members

PtexSeparableFilter.cpp
Go to the documentation of this file.
1 /*
2 PTEX SOFTWARE
3 Copyright 2009 Disney Enterprises, Inc. All rights reserved
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are
7 met:
8
9 * Redistributions of source code must retain the above copyright
10 notice, this list of conditions and the following disclaimer.
11
12 * Redistributions in binary form must reproduce the above copyright
13 notice, this list of conditions and the following disclaimer in
14 the documentation and/or other materials provided with the
15 distribution.
16
17 * The names "Disney", "Walt Disney Pictures", "Walt Disney Animation
18 Studios" or the names of its contributors may NOT be used to
19 endorse or promote products derived from this software without
20 specific prior written permission from Walt Disney Pictures.
21
22 Disclaimer: THIS SOFTWARE IS PROVIDED BY WALT DISNEY PICTURES AND
23 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
24 BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
25 FOR A PARTICULAR PURPOSE, NONINFRINGEMENT AND TITLE ARE DISCLAIMED.
26 IN NO EVENT SHALL WALT DISNEY PICTURES, THE COPYRIGHT HOLDER OR
27 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
28 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
29 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND BASED ON ANY
31 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
33 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
34 */
35
36 #include "PtexPlatform.h"
37 #include <math.h>
38 #include <assert.h>
39
40 #include "PtexSeparableFilter.h"
41 #include "PtexSeparableKernel.h"
42 #include "PtexUtils.h"
43
44
45 //#define NOEDGEBLEND // uncomment to disable filtering across edges (for debugging)
46
47 void PtexSeparableFilter::eval(float* result, int firstChan, int nChannels,
48 int faceid, float u, float v,
49 float uw1, float vw1, float uw2, float vw2,
50 float width, float blur)
51 {
52 // init
53 if (!_tx || nChannels <= 0) return;
54 if (faceid < 0 || faceid >= _tx->numFaces()) return;
55 _ntxchan = _tx->numChannels();
56 _dt = _tx->dataType();
57 _firstChanOffset = firstChan*DataSize(_dt);
58 _nchan = PtexUtils::min(nChannels, _ntxchan-firstChan);
59
60 // get face info
61 const FaceInfo& f = _tx->getFaceInfo(faceid);
62
63 // if neighborhood is constant, just return constant value of face
64 if (f.isNeighborhoodConstant()) {
65 PtexPtr<PtexFaceData> data ( _tx->getData(faceid, 0) );
66 if (data) {
67 char* d = (char*) data->getData() + _firstChanOffset;
68 Ptex::ConvertToFloat(result, d, _dt, _nchan);
69 }
70 return;
71 }
72
73 // find filter width as bounding box of vectors w1 and w2
74 float uw = fabsf(uw1) + fabsf(uw2), vw = fabsf(vw1) + fabsf(vw2);
75
76 // handle border modes
77 switch (_uMode) {
78 case m_clamp: u = PtexUtils::clamp(u, 0.0f, 1.0f); break;
79 case m_periodic: u = u-floorf(u); break;
80 case m_black: break; // do nothing
81 }
82
83 switch (_vMode) {
84 case m_clamp: v = PtexUtils::clamp(v, 0.0f, 1.0f); break;
85 case m_periodic: v = v-floorf(v);
86 case m_black: break; // do nothing
87 }
88
89 // build kernel
90 PtexSeparableKernel k;
91 if (f.isSubface()) {
92 // for a subface, build the kernel as if it were on a main face and then downres
93 uw = uw * width + blur * 2.0f;
94 vw = vw * width + blur * 2.0f;
95 buildKernel(k, u*.5f, v*.5f, uw*.5f, vw*.5f,
96 Ptex::Res((int8_t)(f.res.ulog2+1),(int8_t)(f.res.vlog2+1)));
97 if (k.res.ulog2 == 0) k.upresU();
98 if (k.res.vlog2 == 0) k.upresV();
99 k.res.ulog2--; k.res.vlog2--;
100 }
101 else {
102 uw = uw * width + blur;
103 vw = vw * width + blur;
104 buildKernel(k, u, v, uw, vw, f.res);
105 }
106 k.stripZeros();
107
108 // check kernel (debug only)
109 assert(k.uw > 0 && k.vw > 0);
110 assert(k.uw <= PtexSeparableKernel::kmax && k.vw <= PtexSeparableKernel::kmax);
111 _weight = k.weight();
112
113 // allocate temporary result
114 _result = (float*) alloca(sizeof(float)*_nchan);
115 memset(_result, 0, sizeof(float)*_nchan);
116
117 // apply to faces
118 splitAndApply(k, faceid, f);
119
120 // normalize (both for data type and cumulative kernel weight applied)
121 // and output result
122 float scale = 1.0f / (_weight * OneValue(_dt));
123 for (int i = 0; i < _nchan; i++) result[i] = float(_result[i] * scale);
124
125 // clear temp result
126 _result = 0;
127 }
128
129
130 void PtexSeparableFilter::splitAndApply(PtexSeparableKernel& k, int faceid, const Ptex::FaceInfo& f)
131 {
132 // do we need to split? (i.e. does kernel span an edge?)
133 bool splitR = (k.u+k.uw > k.res.u()), splitL = (k.u < 0);
134 bool splitT = (k.v+k.vw > k.res.v()), splitB = (k.v < 0);
135
136 #ifdef NOEDGEBLEND
137 // for debugging only
138 if (splitR) k.mergeR(_uMode);
139 if (splitL) k.mergeL(_uMode);
140 if (splitT) k.mergeT(_vMode);
141 if (splitB) k.mergeB(_vMode);
142 #else
143 if (splitR || splitL || splitT || splitB) {
144 PtexSeparableKernel ka, kc;
145 if (splitR) {
146 if (f.adjface(e_right) >= 0) {
147 k.splitR(ka);
148 if (splitT) {
149 if (f.adjface(e_top) >= 0) {
150 ka.splitT(kc);
151 applyToCorner(kc, faceid, f, e_top);
152 }
153 else ka.mergeT(_vMode);
154 }
155 if (splitB) {
156 if (f.adjface(e_bottom) >= 0) {
157 ka.splitB(kc);
158 applyToCorner(kc, faceid, f, e_right);
159 }
160 else ka.mergeB(_vMode);
161 }
162 applyAcrossEdge(ka, faceid, f, e_right);
163 }
164 else k.mergeR(_uMode);
165 }
166 if (splitL) {
167 if (f.adjface(e_left) >= 0) {
168 k.splitL(ka);
169 if (splitT) {
170 if (f.adjface(e_top) >= 0) {
171 ka.splitT(kc);
172 applyToCorner(kc, faceid, f, e_left);
173 }
174 else ka.mergeT(_vMode);
175 }
176 if (splitB) {
177 if (f.adjface(e_bottom) >= 0) {
178 ka.splitB(kc);
179 applyToCorner(kc, faceid, f, e_bottom);
180 }
181 else ka.mergeB(_vMode);
182 }
183 applyAcrossEdge(ka, faceid, f, e_left);
184 }
185 else k.mergeL(_uMode);
186 }
187 if (splitT) {
188 if (f.adjface(e_top) >= 0) {
189 k.splitT(ka);
190 applyAcrossEdge(ka, faceid, f, e_top);
191 }
192 else k.mergeT(_vMode);
193 }
194 if (splitB) {
195 if (f.adjface(e_bottom) >= 0) {
196 k.splitB(ka);
197 applyAcrossEdge(ka, faceid, f, e_bottom);
198 }
199 else k.mergeB(_vMode);
200 }
201 }
202 #endif
203
204 // do local face
205 apply(k, faceid, f);
206 }
207
208
209 void PtexSeparableFilter::applyAcrossEdge(PtexSeparableKernel& k,
210 int faceid, const Ptex::FaceInfo& f, int eid)
211 {
212 int afid = f.adjface(eid), aeid = f.adjedge(eid);
213 const Ptex::FaceInfo* af = &_tx->getFaceInfo(afid);
214 int rot = eid - aeid + 2;
215
216 // adjust uv coord and res for face/subface boundary
217 bool fIsSubface = f.isSubface(), afIsSubface = af->isSubface();
218 if (fIsSubface != afIsSubface) {
219 if (afIsSubface) {
220 // main face to subface transition
221 // adjust res and offset uv coord for primary subface
222 bool primary = k.adjustMainToSubface(eid);
223 if (!primary) {
224 // advance ajacent face and edge id to secondary subface
225 int neid = (aeid + 3) % 4;
226 afid = af->adjface(neid);
227 aeid = af->adjedge(neid);
228 af = &_tx->getFaceInfo(afid);
229 rot += neid - aeid + 2;
230 }
231 }
232 else {
233 // subface to main face transition
234 // Note: the transform depends on which subface the kernel is
235 // coming from. The "primary" subface is the one the main
236 // face is pointing at. The secondary subface adjustment
237 // happens to be the same as for the primary subface for the
238 // next edge, so the cases can be combined.
239 bool primary = (af->adjface(aeid) == faceid);
240 k.adjustSubfaceToMain(eid - primary);
241 }
242 }
243
244 // rotate and apply (resplit if going to a subface)
245 k.rotate(rot);
246 if (afIsSubface) splitAndApply(k, afid, *af);
247 else apply(k, afid, *af);
248 }
249
250
251 void PtexSeparableFilter::applyToCorner(PtexSeparableKernel& k, int faceid,
252 const Ptex::FaceInfo& f, int eid)
253 {
254 // traverse clockwise around corner vertex and gather corner faces
255 int afid = faceid, aeid = eid;
256 const FaceInfo* af = &f;
257 bool prevIsSubface = af->isSubface();
258
259 const int MaxValence = 10;
260 int cfaceId[MaxValence];
261 int cedgeId[MaxValence];
262 const FaceInfo* cface[MaxValence];
263
264 int numCorners = 0;
265 for (int i = 0; i < MaxValence; i++) {
266 // advance to next face
267 int prevFace = afid;
268 afid = af->adjface(aeid);
269 aeid = (af->adjedge(aeid) + 1) % 4;
270
271 // we hit a boundary or reached starting face
272 // note: we need to check edge id too because we might have
273 // a periodic texture (w/ toroidal topology) where all 4 corners
274 // are from the same face
275 if (afid < 0 || (afid == faceid && aeid == eid)) {
276 numCorners = i - 2;
277 break;
278 }
279
280 // record face info
281 af = &_tx->getFaceInfo(afid);
282 cfaceId[i] = afid;
283 cedgeId[i] = aeid;
284 cface[i] = af;
285
286 // check to see if corner is a subface "tee"
287 bool isSubface = af->isSubface();
288 if (prevIsSubface && !isSubface && af->adjface((aeid+3)%4) == prevFace)
289 {
290 // adjust the eid depending on whether we started from
291 // the primary or secondary subface.
292 bool primary = (i==1);
293 k.adjustSubfaceToMain(eid + primary * 2);
294 k.rotate(eid - aeid + 3 - primary);
295 splitAndApply(k, afid, *af);
296 return;
297 }
298 prevIsSubface = isSubface;
299 }
300
301 if (numCorners == 1) {
302 // regular case (valence 4)
303 applyToCornerFace(k, f, eid, cfaceId[1], *cface[1], cedgeId[1]);
304 }
305 else if (numCorners > 1) {
306 // valence 5+, make kernel symmetric and apply equally to each face
307 // first, rotate to standard orientation, u=v=0
308 k.rotate(eid + 2);
309 float initialWeight = k.weight();
310 float newWeight = k.makeSymmetric(initialWeight);
311 for (int i = 1; i <= numCorners; i++) {
312 PtexSeparableKernel kc = k;
313 applyToCornerFace(kc, f, 2, cfaceId[i], *cface[i], cedgeId[i]);
314 }
315 // adjust weight for symmetrification and for additional corners
316 _weight += newWeight * (float)numCorners - initialWeight;
317 }
318 else {
319 // valence 2 or 3, ignore corner face (just adjust weight)
320 _weight -= k.weight();
321 }
322 }
323
324
325 void PtexSeparableFilter::applyToCornerFace(PtexSeparableKernel& k, const Ptex::FaceInfo& f, int eid,
326 int cfid, const Ptex::FaceInfo& cf, int ceid)
327 {
328 // adjust uv coord and res for face/subface boundary
329 bool fIsSubface = f.isSubface(), cfIsSubface = cf.isSubface();
330 if (fIsSubface != cfIsSubface) {
331 if (cfIsSubface) k.adjustMainToSubface(eid + 3);
332 else k.adjustSubfaceToMain(eid + 3);
333 }
334
335 // rotate and apply (resplit if going to a subface)
336 k.rotate(eid - ceid + 2);
337 if (cfIsSubface) splitAndApply(k, cfid, cf);
338 else apply(k, cfid, cf);
339 }
340
341
342 void PtexSeparableFilter::apply(PtexSeparableKernel& k, int faceid, const Ptex::FaceInfo& f)
343 {
344 assert(k.u >= 0 && k.u + k.uw <= k.res.u());
345 assert(k.v >= 0 && k.v + k.vw <= k.res.v());
346
347 if (k.uw <= 0 || k.vw <= 0) return;
348
349 // downres kernel if needed
350 while (k.res.u() > f.res.u()) k.downresU();
351 while (k.res.v() > f.res.v()) k.downresV();
352
353 // get face data, and apply
354 PtexPtr<PtexFaceData> dh ( _tx->getData(faceid, k.res) );
355 if (!dh) return;
356
357 if (dh->isConstant()) {
358 k.applyConst(_result, (char*)dh->getData()+_firstChanOffset, _dt, _nchan);
359 }
360 else if (dh->isTiled()) {
361 Ptex::Res tileres = dh->tileRes();
362 PtexSeparableKernel kt;
363 kt.res = tileres;
364 int tileresu = tileres.u();
365 int tileresv = tileres.v();
366 int ntilesu = k.res.u() / tileresu;
367 for (int v = k.v, vw = k.vw; vw > 0; vw -= kt.vw, v += kt.vw) {
368 int tilev = v / tileresv;
369 kt.v = v % tileresv;
370 kt.vw = PtexUtils::min(vw, tileresv - kt.v);
371 kt.kv = k.kv + v - k.v;
372 for (int u = k.u, uw = k.uw; uw > 0; uw -= kt.uw, u += kt.uw) {
373 int tileu = u / tileresu;
374 kt.u = u % tileresu;
375 kt.uw = PtexUtils::min(uw, tileresu - kt.u);
376 kt.ku = k.ku + u - k.u;
377 PtexPtr<PtexFaceData> th ( dh->getTile(tilev * ntilesu + tileu) );
378 if (th) {
379 if (th->isConstant())
380 kt.applyConst(_result, (char*)th->getData()+_firstChanOffset, _dt, _nchan);
381 else
382 kt.apply(_result, (char*)th->getData()+_firstChanOffset, _dt, _nchan, _ntxchan);
383 }
384 }
385 }
386 }
387 else {
388 k.apply(_result, (char*)dh->getData()+_firstChanOffset, _dt, _nchan, _ntxchan);
389 }
390 }
PtexSeparableKernel::v
int v
Definition: PtexSeparableKernel.h:49
Ptex::e_left
Left edge, from UV (0,1) to (0,0)
Definition: Ptexture.h:103
PtexSeparableKernel::upresU
void upresU()
Definition: PtexSeparableKernel.h:362
Ptex::FaceInfo::adjface
int adjface(int eid) const
Access an adjacent face id. The eid value must be 0..3.
Definition: Ptexture.h:267
PtexTexture::numChannels
virtual int numChannels()=0
Number of channels stored in file.
PtexSeparableFilter::splitAndApply
void splitAndApply(PtexSeparableKernel &k, int faceid, const Ptex::FaceInfo &f)
Definition: PtexSeparableFilter.cpp:130
PtexSeparableKernel::kmax
static const int kmax
Definition: PtexSeparableKernel.h:53
PtexSeparableFilter::apply
void apply(PtexSeparableKernel &k, int faceid, const Ptex::FaceInfo &f)
Definition: PtexSeparableFilter.cpp:342
PtexSeparableFilter::_tx
PtexTexture * _tx
Definition: PtexSeparableFilter.h:69
PtexSeparableKernel::apply
void apply(float *dst, void *data, DataType dt, int nChan, int nTxChan)
Definition: PtexSeparableKernel.h:448
PtexSeparableKernel::applyConst
void applyConst(float *dst, void *data, DataType dt, int nChan)
Definition: PtexSeparableKernel.h:455
Ptex::DataSize
static int DataSize(DataType dt)
Look up size of given data type (in bytes).
Definition: Ptexture.h:132
PtexSeparableKernel::kv
float * kv
Definition: PtexSeparableKernel.h:52
PtexSeparableFilter::_result
float * _result
Definition: PtexSeparableFilter.h:71
PtexSeparableFilter::eval
virtual void eval(float *result, int firstchan, int nchannels, int faceid, float u, float v, float uw1, float vw1, float uw2, float vw2, float width, float blur)
Apply filter to a ptex data file.
Definition: PtexSeparableFilter.cpp:47
Ptex::e_top
Top edge, from UV (1,1) to (0,1)
Definition: Ptexture.h:102
PtexSeparableKernel
Definition: PtexSeparableKernel.h:46
PtexSeparableKernel::downresV
void downresV()
Definition: PtexSeparableKernel.h:333
PtexSeparableKernel::mergeL
void mergeL(BorderMode mode)
Definition: PtexSeparableKernel.h:102
PtexUtils::min
static T min(T a, T b)
Definition: PtexUtils.h:116
PtexSeparableKernel::mergeB
void mergeB(BorderMode mode)
Definition: PtexSeparableKernel.h:121
PtexSeparableKernel::downresU
void downresU()
Definition: PtexSeparableKernel.h:304
Ptex::FaceInfo::isNeighborhoodConstant
bool isNeighborhoodConstant() const
Determine if neighborhood of face is constant (by checking a flag).
Definition: Ptexture.h:273
PtexSeparableFilter::_uMode
BorderMode _uMode
Definition: PtexSeparableFilter.h:77
PtexSeparableKernel::adjustMainToSubface
bool adjustMainToSubface(int eid)
Definition: PtexSeparableKernel.h:257
PtexSeparableKernel::ku
float * ku
Definition: PtexSeparableKernel.h:51
PtexSeparableKernel::makeSymmetric
float makeSymmetric(float initialWeight)
Definition: PtexSeparableKernel.h:388
PtexPlatform.h
Platform-specific classes, functions, and includes.
Ptex::Res::v
int v() const
V resolution in texels.
Definition: Ptexture.h:181
PtexSeparableFilter::_nchan
int _nchan
Definition: PtexSeparableFilter.h:74
PtexSeparableFilter.h
Ptex::OneValue
static float OneValue(DataType dt)
Look up value of given data type that corresponds to the normalized value of 1.0. ...
Definition: Ptexture.h:138
Ptex::e_bottom
Bottom edge, from UV (0,0) to (1,0)
Definition: Ptexture.h:100
Ptex::Res::u
int u() const
U resolution in texels.
Definition: Ptexture.h:178
PtexSeparableFilter::_weight
float _weight
Definition: PtexSeparableFilter.h:72
Ptex::Res::vlog2
int8_t vlog2
log base 2 of v resolution, in texels
Definition: Ptexture.h:163
PtexSeparableFilter::_firstChanOffset
int _firstChanOffset
Definition: PtexSeparableFilter.h:73
PtexUtils::clamp
static T clamp(T x, T lo, T hi)
Definition: PtexUtils.h:122
PtexSeparableKernel::uw
int uw
Definition: PtexSeparableKernel.h:50
PtexSeparableKernel::mergeR
void mergeR(BorderMode mode)
Definition: PtexSeparableKernel.h:112
PtexSeparableKernel::res
Res res
Definition: PtexSeparableKernel.h:48
PtexTexture::getData
virtual void getData(int faceid, void *buffer, int stride)=0
Access texture data for a face at highest-resolution.
PtexSeparableFilter::_vMode
BorderMode _vMode
Definition: PtexSeparableFilter.h:77
PtexSeparableKernel::upresV
void upresV()
Definition: PtexSeparableKernel.h:375
Ptex::FaceInfo::isSubface
bool isSubface() const
Determine if face is a subface (by checking a flag).
Definition: Ptexture.h:279
PtexSeparableKernel::adjustSubfaceToMain
void adjustSubfaceToMain(int eid)
Definition: PtexSeparableKernel.h:293
PtexSeparableKernel.h
PtexSeparableFilter::_ntxchan
int _ntxchan
Definition: PtexSeparableFilter.h:75
PtexTexture::numFaces
virtual int numFaces()=0
Number of faces stored in file.
PtexSeparableKernel::u
int u
Definition: PtexSeparableKernel.h:49
PtexSeparableKernel::mergeT
void mergeT(BorderMode mode)
Definition: PtexSeparableKernel.h:131
Ptex::FaceInfo::adjedge
EdgeId adjedge(int eid) const
Access an adjacent edge id. The eid value must be 0..3.
Definition: Ptexture.h:264
PtexSeparableFilter::buildKernel
virtual void buildKernel(PtexSeparableKernel &k, float u, float v, float uw, float vw, Res faceRes)=0
Ptex::m_black
texel beyond border are assumed to be black
Definition: Ptexture.h:93
PtexTexture::dataType
virtual Ptex::DataType dataType()=0
Type of data stored in file.
PtexSeparableKernel::splitL
void splitL(PtexSeparableKernel &k)
Definition: PtexSeparableKernel.h:140
PtexSeparableKernel::vw
int vw
Definition: PtexSeparableKernel.h:50
PtexPtr
Smart-pointer for acquiring and releasing API objects.
Definition: Ptexture.h:955
PtexSeparableFilter::applyToCornerFace
void applyToCornerFace(PtexSeparableKernel &k, const Ptex::FaceInfo &f, int eid, int cfaceid, const Ptex::FaceInfo &cf, int ceid)
Definition: PtexSeparableFilter.cpp:325
PtexSeparableFilter::_dt
DataType _dt
Definition: PtexSeparableFilter.h:76
PtexSeparableKernel::splitB
void splitB(PtexSeparableKernel &k)
Definition: PtexSeparableKernel.h:184
Ptex::Res::ulog2
int8_t ulog2
log base 2 of u resolution, in texels
Definition: Ptexture.h:162
Ptex::e_right
Right edge, from UV (1,0) to (1,1)
Definition: Ptexture.h:101
PtexSeparableKernel::splitT
void splitT(PtexSeparableKernel &k)
Definition: PtexSeparableKernel.h:206
Ptex::Res
Pixel resolution of a given texture.
Definition: Ptexture.h:161
Ptex::FaceInfo::res
Res res
Resolution of face.
Definition: Ptexture.h:238
PtexSeparableKernel::rotate
void rotate(int rot)
Definition: PtexSeparableKernel.h:246
Ptex::FaceInfo
Information about a face, as stored in the Ptex file header.
Definition: Ptexture.h:237
PtexSeparableKernel::stripZeros
void stripZeros()
Definition: PtexSeparableKernel.h:88
Ptex::m_periodic
texel access wraps to other side of face
Definition: Ptexture.h:94
PtexSeparableFilter::applyAcrossEdge
void applyAcrossEdge(PtexSeparableKernel &k, int faceid, const Ptex::FaceInfo &f, int eid)
Definition: PtexSeparableFilter.cpp:209
Ptex::ConvertToFloat
static void ConvertToFloat(float *dst, const void *src, Ptex::DataType dt, int numChannels)
Convert a number of data values from the given data type to float.
Definition: PtexUtils.cpp:107
PtexTexture::getFaceInfo
virtual const Ptex::FaceInfo & getFaceInfo(int faceid)=0
Access resolution and adjacency information about a face.
PtexUtils.h
PtexSeparableFilter::applyToCorner
void applyToCorner(PtexSeparableKernel &k, int faceid, const Ptex::FaceInfo &f, int eid)
Definition: PtexSeparableFilter.cpp:251
Ptex::m_clamp
texel access is clamped to border
Definition: Ptexture.h:92
PtexSeparableKernel::weight
float weight() const
Definition: PtexSeparableKernel.h:97
PtexSeparableKernel::splitR
void splitR(PtexSeparableKernel &k)
Definition: PtexSeparableKernel.h:163