basegfx/source/polygon/b3dpolypolygontools.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <basegfx/polygon/b3dpolypolygontools.hxx>
  21 #include <basegfx/range/b3drange.hxx>
  22 #include <basegfx/polygon/b3dpolypolygon.hxx>
  23 #include <basegfx/polygon/b3dpolygon.hxx>
  24 #include <basegfx/polygon/b3dpolygontools.hxx>
  25 #include <basegfx/matrix/b3dhommatrix.hxx>
  26 #include <basegfx/numeric/ftools.hxx>
  27 #include <com/sun/star/drawing/DoubleSequence.hpp>
  28 #include <com/sun/star/drawing/PolyPolygonShape3D.hpp>
  29
  30 // predefines
  31 #define nMinSegments sal_uInt32(1)
  32 #define nMaxSegments sal_uInt32(512)
  33
  34 namespace basegfx::utils
  35 {
  36         // B3DPolyPolygon tools
  37         B3DRange getRange(const B3DPolyPolygon& rCandidate)
  38         {
  39             B3DRange aRetval;
  40
  41             for(const auto& rPolygon : rCandidate )
  42             {
  43                 aRetval.expand(getRange(rPolygon));
  44             }
  45
  46             return aRetval;
  47         }
  48
  49         B3DPolyPolygon const & createUnitCubePolyPolygon()
  50         {
  51             static auto const singleton = [] {
  52                     B3DPolyPolygon aRetval;
  53                     B3DPolygon aTemp;
  54                     aTemp.append(B3DPoint(0.0, 0.0, 1.0));
  55                     aTemp.append(B3DPoint(0.0, 1.0, 1.0));
  56                     aTemp.append(B3DPoint(1.0, 1.0, 1.0));
  57                     aTemp.append(B3DPoint(1.0, 0.0, 1.0));
  58                     aTemp.setClosed(true);
  59                     aRetval.append(aTemp);
  60
  61                     aTemp.clear();
  62                     aTemp.append(B3DPoint(0.0, 0.0, 0.0));
  63                     aTemp.append(B3DPoint(0.0, 1.0, 0.0));
  64                     aTemp.append(B3DPoint(1.0, 1.0, 0.0));
  65                     aTemp.append(B3DPoint(1.0, 0.0, 0.0));
  66                     aTemp.setClosed(true);
  67                     aRetval.append(aTemp);
  68
  69                     aTemp.clear();
  70                     aTemp.append(B3DPoint(0.0, 0.0, 0.0));
  71                     aTemp.append(B3DPoint(0.0, 0.0, 1.0));
  72                     aRetval.append(aTemp);
  73
  74                     aTemp.clear();
  75                     aTemp.append(B3DPoint(0.0, 1.0, 0.0));
  76                     aTemp.append(B3DPoint(0.0, 1.0, 1.0));
  77                     aRetval.append(aTemp);
  78
  79                     aTemp.clear();
  80                     aTemp.append(B3DPoint(1.0, 1.0, 0.0));
  81                     aTemp.append(B3DPoint(1.0, 1.0, 1.0));
  82                     aRetval.append(aTemp);
  83
  84                     aTemp.clear();
  85                     aTemp.append(B3DPoint(1.0, 0.0, 0.0));
  86                     aTemp.append(B3DPoint(1.0, 0.0, 1.0));
  87                     aRetval.append(aTemp);
  88                     return aRetval;
  89                 }();
  90             return singleton;
  91         }
  92
  93         B3DPolyPolygon const & createUnitCubeFillPolyPolygon()
  94         {
  95             static auto const singleton = [] {
  96                     B3DPolyPolygon aRetval;
  97                     B3DPolygon aTemp;
  98
  99                     // all points
 100                     const B3DPoint A(0.0, 0.0, 0.0);
 101                     const B3DPoint B(0.0, 1.0, 0.0);
 102                     const B3DPoint C(1.0, 1.0, 0.0);
 103                     const B3DPoint D(1.0, 0.0, 0.0);
 104                     const B3DPoint E(0.0, 0.0, 1.0);
 105                     const B3DPoint F(0.0, 1.0, 1.0);
 106                     const B3DPoint G(1.0, 1.0, 1.0);
 107                     const B3DPoint H(1.0, 0.0, 1.0);
 108
 109                     // create bottom
 110                     aTemp.append(D);
 111                     aTemp.append(A);
 112                     aTemp.append(E);
 113                     aTemp.append(H);
 114                     aTemp.setClosed(true);
 115                     aRetval.append(aTemp);
 116
 117                     // create front
 118                     aTemp.clear();
 119                     aTemp.append(B);
 120                     aTemp.append(A);
 121                     aTemp.append(D);
 122                     aTemp.append(C);
 123                     aTemp.setClosed(true);
 124                     aRetval.append(aTemp);
 125
 126                     // create left
 127                     aTemp.clear();
 128                     aTemp.append(E);
 129                     aTemp.append(A);
 130                     aTemp.append(B);
 131                     aTemp.append(F);
 132                     aTemp.setClosed(true);
 133                     aRetval.append(aTemp);
 134
 135                     // create top
 136                     aTemp.clear();
 137                     aTemp.append(C);
 138                     aTemp.append(G);
 139                     aTemp.append(F);
 140                     aTemp.append(B);
 141                     aTemp.setClosed(true);
 142                     aRetval.append(aTemp);
 143
 144                     // create right
 145                     aTemp.clear();
 146                     aTemp.append(H);
 147                     aTemp.append(G);
 148                     aTemp.append(C);
 149                     aTemp.append(D);
 150                     aTemp.setClosed(true);
 151                     aRetval.append(aTemp);
 152
 153                     // create back
 154                     aTemp.clear();
 155                     aTemp.append(F);
 156                     aTemp.append(G);
 157                     aTemp.append(H);
 158                     aTemp.append(E);
 159                     aTemp.setClosed(true);
 160                     aRetval.append(aTemp);
 161                     return aRetval;
 162                 }();
 163             return singleton;
 164         }
 165
 166         B3DPolyPolygon createCubePolyPolygonFromB3DRange( const B3DRange& rRange)
 167         {
 168             B3DPolyPolygon aRetval;
 169
 170             if(!rRange.isEmpty())
 171             {
 172                 aRetval = createUnitCubePolyPolygon();
 173                 B3DHomMatrix aTrans;
 174                 aTrans.scale(rRange.getWidth(), rRange.getHeight(), rRange.getDepth());
 175                 aTrans.translate(rRange.getMinX(), rRange.getMinY(), rRange.getMinZ());
 176                 aRetval.transform(aTrans);
 177                 aRetval.removeDoublePoints();
 178             }
 179
 180             return aRetval;
 181         }
 182
 183         B3DPolyPolygon createCubeFillPolyPolygonFromB3DRange( const B3DRange& rRange)
 184         {
 185             B3DPolyPolygon aRetval;
 186
 187             if(!rRange.isEmpty())
 188             {
 189                 aRetval = createUnitCubeFillPolyPolygon();
 190                 B3DHomMatrix aTrans;
 191                 aTrans.scale(rRange.getWidth(), rRange.getHeight(), rRange.getDepth());
 192                 aTrans.translate(rRange.getMinX(), rRange.getMinY(), rRange.getMinZ());
 193                 aRetval.transform(aTrans);
 194                 aRetval.removeDoublePoints();
 195             }
 196
 197             return aRetval;
 198         }
 199
 200         // helper for getting the 3D Point from given cartesian coordinates. fHor is defined from
 201         // [M_PI_2 .. -M_PI_2], fVer from [0.0 .. 2PI]
 202         static B3DPoint getPointFromCartesian(double fHor, double fVer)
 203         {
 204             const double fCosVer(cos(fVer));
 205             return B3DPoint(fCosVer * cos(fHor), sin(fVer), fCosVer * -sin(fHor));
 206         }
 207
 208         B3DPolyPolygon createUnitSpherePolyPolygon(
 209             sal_uInt32 nHorSeg, sal_uInt32 nVerSeg,
 210             double fVerStart, double fVerStop,
 211             double fHorStart, double fHorStop)
 212         {
 213             B3DPolyPolygon aRetval;
 214             sal_uInt32 a, b;
 215
 216             if(!nHorSeg)
 217             {
 218                 nHorSeg = fround(fabs(fHorStop - fHorStart) / (M_PI / 12.0));
 219             }
 220
 221             // min/max limitations
 222             nHorSeg = std::clamp(nHorSeg, nMinSegments, nMaxSegments);
 223
 224             if(!nVerSeg)
 225             {
 226                 nVerSeg = fround(fabs(fVerStop - fVerStart) / (M_PI / 12.0));
 227             }
 228
 229             // min/max limitations
 230             nVerSeg = std::clamp(nVerSeg, nMinSegments, nMaxSegments);
 231
 232             // create constants
 233             const double fVerDiffPerStep((fVerStop - fVerStart) / static_cast<double>(nVerSeg));
 234             const double fHorDiffPerStep((fHorStop - fHorStart) / static_cast<double>(nHorSeg));
 235             bool bHorClosed(fTools::equal(fHorStop - fHorStart, 2 * M_PI));
 236             bool bVerFromTop(fTools::equal(fVerStart, M_PI_2));
 237             bool bVerToBottom(fTools::equal(fVerStop, -M_PI_2));
 238
 239             // create horizontal rings
 240             const sal_uInt32 nLoopVerInit(bVerFromTop ? 1 : 0);
 241             const sal_uInt32 nLoopVerLimit(bVerToBottom ? nVerSeg : nVerSeg + 1);
 242             const sal_uInt32 nLoopHorLimit(bHorClosed ? nHorSeg : nHorSeg + 1);
 243
 244             for(a = nLoopVerInit; a < nLoopVerLimit; a++)
 245             {
 246                 const double fVer(fVerStart + (static_cast<double>(a) * fVerDiffPerStep));
 247                 B3DPolygon aNew;
 248
 249                 for(b = 0; b < nLoopHorLimit; b++)
 250                 {
 251                     const double fHor(fHorStart + (static_cast<double>(b) * fHorDiffPerStep));
 252                     aNew.append(getPointFromCartesian(fHor, fVer));
 253                 }
 254
 255                 aNew.setClosed(bHorClosed);
 256                 aRetval.append(aNew);
 257             }
 258
 259             // create vertical half-rings
 260             for(a = 0; a < nLoopHorLimit; a++)
 261             {
 262                 const double fHor(fHorStart + (static_cast<double>(a) * fHorDiffPerStep));
 263                 B3DPolygon aNew;
 264
 265                 if(bVerFromTop)
 266                 {
 267                     aNew.append(B3DPoint(0.0, 1.0, 0.0));
 268                 }
 269
 270                 for(b = nLoopVerInit; b < nLoopVerLimit; b++)
 271                 {
 272                     const double fVer(fVerStart + (static_cast<double>(b) * fVerDiffPerStep));
 273                     aNew.append(getPointFromCartesian(fHor, fVer));
 274                 }
 275
 276                 if(bVerToBottom)
 277                 {
 278                     aNew.append(B3DPoint(0.0, -1.0, 0.0));
 279                 }
 280
 281                 aRetval.append(aNew);
 282             }
 283
 284             return aRetval;
 285         }
 286
 287         B3DPolyPolygon createSpherePolyPolygonFromB3DRange( const B3DRange& rRange,
 288             sal_uInt32 nHorSeg, sal_uInt32 nVerSeg,
 289             double fVerStart, double fVerStop,
 290             double fHorStart, double fHorStop)
 291         {
 292             B3DPolyPolygon aRetval(createUnitSpherePolyPolygon(nHorSeg, nVerSeg, fVerStart, fVerStop, fHorStart, fHorStop));
 293
 294             if(aRetval.count())
 295             {
 296                 // move and scale whole construct which is now in [-1.0 .. 1.0] in all directions
 297                 B3DHomMatrix aTrans;
 298                 aTrans.translate(1.0, 1.0, 1.0);
 299                 aTrans.scale(rRange.getWidth() / 2.0, rRange.getHeight() / 2.0, rRange.getDepth() / 2.0);
 300                 aTrans.translate(rRange.getMinX(), rRange.getMinY(), rRange.getMinZ());
 301                 aRetval.transform(aTrans);
 302             }
 303
 304             return aRetval;
 305         }
 306
 307         B3DPolyPolygon createUnitSphereFillPolyPolygon(
 308             sal_uInt32 nHorSeg, sal_uInt32 nVerSeg,
 309             bool bNormals,
 310             double fVerStart, double fVerStop,
 311             double fHorStart, double fHorStop)
 312         {
 313             B3DPolyPolygon aRetval;
 314
 315             if(!nHorSeg)
 316             {
 317                 nHorSeg = fround(fabs(fHorStop - fHorStart) / (M_PI / 12.0));
 318             }
 319
 320             // min/max limitations
 321             nHorSeg = std::clamp(nHorSeg, nMinSegments, nMaxSegments);
 322
 323             if(!nVerSeg)
 324             {
 325                 nVerSeg = fround(fabs(fVerStop - fVerStart) / (M_PI / 12.0));
 326             }
 327
 328             // min/max limitations
 329             nVerSeg = std::clamp(nVerSeg, nMinSegments, nMaxSegments);
 330
 331             // vertical loop
 332             for(sal_uInt32 a(0); a < nVerSeg; a++)
 333             {
 334                 const double fVer1(fVerStart + (((fVerStop - fVerStart) * a) / nVerSeg));
 335                 const double fVer2(fVerStart + (((fVerStop - fVerStart) * (a + 1)) / nVerSeg));
 336
 337                 // horizontal loop
 338                 for(sal_uInt32 b(0); b < nHorSeg; b++)
 339                 {
 340                     const double fHor1(fHorStart + (((fHorStop - fHorStart) * b) / nHorSeg));
 341                     const double fHor2(fHorStart + (((fHorStop - fHorStart) * (b + 1)) / nHorSeg));
 342                     B3DPolygon aNew;
 343
 344                     aNew.append(getPointFromCartesian(fHor1, fVer1));
 345                     aNew.append(getPointFromCartesian(fHor2, fVer1));
 346                     aNew.append(getPointFromCartesian(fHor2, fVer2));
 347                     aNew.append(getPointFromCartesian(fHor1, fVer2));
 348
 349                     if(bNormals)
 350                     {
 351                         for(sal_uInt32 c(0); c < aNew.count(); c++)
 352                         {
 353                             aNew.setNormal(c, ::basegfx::B3DVector(aNew.getB3DPoint(c)));
 354                         }
 355                     }
 356
 357                     aNew.setClosed(true);
 358                     aRetval.append(aNew);
 359                 }
 360             }
 361
 362             return aRetval;
 363         }
 364
 365         B3DPolyPolygon createSphereFillPolyPolygonFromB3DRange( const B3DRange& rRange,
 366             sal_uInt32 nHorSeg, sal_uInt32 nVerSeg,
 367             bool bNormals,
 368             double fVerStart, double fVerStop,
 369             double fHorStart, double fHorStop)
 370         {
 371             B3DPolyPolygon aRetval(createUnitSphereFillPolyPolygon(nHorSeg, nVerSeg, bNormals, fVerStart, fVerStop, fHorStart, fHorStop));
 372
 373             if(aRetval.count())
 374             {
 375                 // move and scale whole construct which is now in [-1.0 .. 1.0] in all directions
 376                 B3DHomMatrix aTrans;
 377                 aTrans.translate(1.0, 1.0, 1.0);
 378                 aTrans.scale(rRange.getWidth() / 2.0, rRange.getHeight() / 2.0, rRange.getDepth() / 2.0);
 379                 aTrans.translate(rRange.getMinX(), rRange.getMinY(), rRange.getMinZ());
 380                 aRetval.transform(aTrans);
 381             }
 382
 383             return aRetval;
 384         }
 385
 386         B3DPolyPolygon applyDefaultNormalsSphere( const B3DPolyPolygon& rCandidate, const B3DPoint& rCenter)
 387         {
 388             B3DPolyPolygon aRetval;
 389
 390             for( const auto& rB3DPolygon : rCandidate)
 391             {
 392                 aRetval.append(applyDefaultNormalsSphere(rB3DPolygon, rCenter));
 393             }
 394
 395             return aRetval;
 396         }
 397
 398         B3DPolyPolygon invertNormals( const B3DPolyPolygon& rCandidate)
 399         {
 400             B3DPolyPolygon aRetval;
 401
 402             for( const auto& rB3DPolygon : rCandidate )
 403             {
 404                 aRetval.append(invertNormals(rB3DPolygon));
 405             }
 406
 407             return aRetval;
 408         }
 409
 410         B3DPolyPolygon applyDefaultTextureCoordinatesParallel( const B3DPolyPolygon& rCandidate, const B3DRange& rRange, bool bChangeX, bool bChangeY)
 411         {
 412             B3DPolyPolygon aRetval;
 413
 414             for( const auto& rB3DPolygon : rCandidate)
 415             {
 416                 aRetval.append(applyDefaultTextureCoordinatesParallel(rB3DPolygon, rRange, bChangeX, bChangeY));
 417             }
 418
 419             return aRetval;
 420         }
 421
 422         B3DPolyPolygon applyDefaultTextureCoordinatesSphere( const B3DPolyPolygon& rCandidate, const B3DPoint& rCenter, bool bChangeX, bool bChangeY)
 423         {
 424             B3DPolyPolygon aRetval;
 425
 426             for( const auto& rB3DPolygon : rCandidate )
 427             {
 428                 aRetval.append(applyDefaultTextureCoordinatesSphere(rB3DPolygon, rCenter, bChangeX, bChangeY));
 429             }
 430
 431             return aRetval;
 432         }
 433
 434         bool isInside(const B3DPolyPolygon& rCandidate, const B3DPoint& rPoint)
 435         {
 436             const sal_uInt32 nPolygonCount(rCandidate.count());
 437
 438             if(nPolygonCount == 1)
 439             {
 440                 return isInside(rCandidate.getB3DPolygon(0), rPoint, false/*bWithBorder*/);
 441             }
 442             else
 443             {
 444                 sal_Int32 nInsideCount(0);
 445
 446                 for(const auto& rPolygon : rCandidate )
 447                 {
 448                     const bool bInside(isInside(rPolygon, rPoint, false/*bWithBorder*/));
 449
 450                     if(bInside)
 451                     {
 452                         nInsideCount++;
 453                     }
 454                 }
 455
 456                 return (nInsideCount % 2);
 457             }
 458         }
 459
 460 /// converters for css::drawing::PolyPolygonShape3D
 461         B3DPolyPolygon UnoPolyPolygonShape3DToB3DPolyPolygon(
 462             const css::drawing::PolyPolygonShape3D& rPolyPolygonShape3DSource)
 463         {
 464             B3DPolyPolygon aRetval;
 465             const sal_Int32 nOuterSequenceCount(rPolyPolygonShape3DSource.SequenceX.getLength());
 466
 467             if(nOuterSequenceCount)
 468             {
 469                 assert(nOuterSequenceCount == rPolyPolygonShape3DSource.SequenceY.getLength()
 470                            && nOuterSequenceCount
 471                                   == rPolyPolygonShape3DSource.SequenceZ.getLength()&&
 472                        "UnoPolyPolygonShape3DToB3DPolygon: Not all double sequences have the same "
 473                        "length (!)" );
 474
 475                 for(sal_Int32 a(0); a < nOuterSequenceCount; a++)
 476                 {
 477                     basegfx::B3DPolygon aNewPolygon;
 478
 479                     auto& rInnerSequenceX = rPolyPolygonShape3DSource.SequenceX[a];
 480                     auto& rInnerSequenceY = rPolyPolygonShape3DSource.SequenceY[a];
 481                     auto& rInnerSequenceZ = rPolyPolygonShape3DSource.SequenceZ[a];
 482
 483                     const sal_Int32 nInnerSequenceCount(rInnerSequenceX.getLength());
 484                     assert(nInnerSequenceCount == rInnerSequenceY.getLength()
 485                            && nInnerSequenceCount == rInnerSequenceZ.getLength()
 486                            && "UnoPolyPolygonShape3DToB3DPolygon: Not all double sequences have "
 487                               "the same length (!)");
 488
 489                     for(sal_Int32 b(0); b < nInnerSequenceCount; b++)
 490                     {
 491                         aNewPolygon.append(basegfx::B3DPoint(rInnerSequenceX[b], rInnerSequenceY[b], rInnerSequenceZ[b]));
 492                     }
 493
 494                     // #i101520# correction is needed for imported polygons of old format,
 495                     // see callers
 496                     basegfx::utils::checkClosed(aNewPolygon);
 497
 498                     aRetval.append(aNewPolygon);
 499                 }
 500             }
 501
 502             return aRetval;
 503         }
 504
 505         void B3DPolyPolygonToUnoPolyPolygonShape3D(
 506             const B3DPolyPolygon& rPolyPolygonSource,
 507             css::drawing::PolyPolygonShape3D& rPolyPolygonShape3DRetval)
 508         {
 509             const sal_uInt32 nPolygonCount(rPolyPolygonSource.count());
 510
 511             if(nPolygonCount)
 512             {
 513                 rPolyPolygonShape3DRetval.SequenceX.realloc(nPolygonCount);
 514                 rPolyPolygonShape3DRetval.SequenceY.realloc(nPolygonCount);
 515                 rPolyPolygonShape3DRetval.SequenceZ.realloc(nPolygonCount);
 516
 517                 css::drawing::DoubleSequence* pOuterSequenceX = rPolyPolygonShape3DRetval.SequenceX.getArray();
 518                 css::drawing::DoubleSequence* pOuterSequenceY = rPolyPolygonShape3DRetval.SequenceY.getArray();
 519                 css::drawing::DoubleSequence* pOuterSequenceZ = rPolyPolygonShape3DRetval.SequenceZ.getArray();
 520
 521                 for(sal_uInt32 a(0); a < nPolygonCount; a++)
 522                 {
 523                     const basegfx::B3DPolygon& aPoly(rPolyPolygonSource.getB3DPolygon(a));
 524                     const sal_uInt32 nPointCount(aPoly.count());
 525
 526                     if(nPointCount)
 527                     {
 528                         const bool bIsClosed(aPoly.isClosed());
 529                         const sal_uInt32 nTargetCount(bIsClosed ? nPointCount + 1 : nPointCount);
 530                         pOuterSequenceX->realloc(nTargetCount);
 531                         pOuterSequenceY->realloc(nTargetCount);
 532                         pOuterSequenceZ->realloc(nTargetCount);
 533
 534                         double* pInnerSequenceX = pOuterSequenceX->getArray();
 535                         double* pInnerSequenceY = pOuterSequenceY->getArray();
 536                         double* pInnerSequenceZ = pOuterSequenceZ->getArray();
 537
 538                         for(sal_uInt32 b(0); b < nPointCount; b++)
 539                         {
 540                             const basegfx::B3DPoint aPoint(aPoly.getB3DPoint(b));
 541
 542                             *pInnerSequenceX++ = aPoint.getX();
 543                             *pInnerSequenceY++ = aPoint.getY();
 544                             *pInnerSequenceZ++ = aPoint.getZ();
 545                         }
 546
 547                         if(bIsClosed)
 548                         {
 549                             const basegfx::B3DPoint aPoint(aPoly.getB3DPoint(0));
 550
 551                             *pInnerSequenceX++ = aPoint.getX();
 552                             *pInnerSequenceY++ = aPoint.getY();
 553                             *pInnerSequenceZ++ = aPoint.getZ();
 554                         }
 555                     }
 556                     else
 557                     {
 558                         pOuterSequenceX->realloc(0);
 559                         pOuterSequenceY->realloc(0);
 560                         pOuterSequenceZ->realloc(0);
 561                     }
 562
 563                     pOuterSequenceX++;
 564                     pOuterSequenceY++;
 565                     pOuterSequenceZ++;
 566                 }
 567             }
 568             else
 569             {
 570                 rPolyPolygonShape3DRetval.SequenceX.realloc(0);
 571                 rPolyPolygonShape3DRetval.SequenceY.realloc(0);
 572                 rPolyPolygonShape3DRetval.SequenceZ.realloc(0);
 573             }
 574         }
 575
 576 } // end of namespace
 577
 578 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */