src/INTERP_KERNEL/InterpolationPlanar.txx

   1 // Copyright (C) 2007-2013  CEA/DEN, EDF R&D
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19 // Author : Anthony Geay (CEA/DEN)
  20 #ifndef __INTERPOLATIONPLANAR_TXX__
  21 #define __INTERPOLATIONPLANAR_TXX__
  22
  23 #include "InterpolationPlanar.hxx"
  24 #include "Interpolation.txx"
  25 #include "InterpolationOptions.hxx"
  26 #include "PlanarIntersector.hxx"
  27 #include "PlanarIntersector.txx"
  28 #include "TriangulationIntersector.hxx"
  29 #include "TriangulationIntersector.txx"
  30 #include "ConvexIntersector.hxx"
  31 #include "ConvexIntersector.txx"
  32 #include "Geometric2DIntersector.hxx"
  33 #include "Geometric2DIntersector.txx"
  34 #include "PointLocator2DIntersector.hxx"
  35 #include "PointLocator2DIntersector.txx"
  36 #include "PlanarIntersectorP0P1PL.hxx"
  37 #include "PlanarIntersectorP0P1PL.txx"
  38 #include "PlanarIntersectorP1P0PL.hxx"
  39 #include "PlanarIntersectorP1P0PL.txx"
  40 #include "PlanarIntersectorP1P1PL.hxx"
  41 #include "PlanarIntersectorP1P1PL.txx"
  42 #include "VectorUtils.hxx"
  43 #include "BBTree.txx"
  44
  45 #include <limits>
  46 #include <time.h>
  47
  48 namespace INTERP_KERNEL
  49 {
  50   /**
  51    * \defgroup interpolationPlanar InterpolationPlanar
  52    *
  53    * \class InterpolationPlanar
  54    * \brief Class used to compute the coefficients of the interpolation matrix between
  55    * two local meshes in two dimensions. Meshes can contain mixed triangular and quadrangular elements.
  56    */
  57   template<class RealPlanar>
  58   InterpolationPlanar<RealPlanar>::InterpolationPlanar():_dim_caracteristic(1)
  59
  60   {
  61   }
  62
  63   template<class RealPlanar>
  64   InterpolationPlanar<RealPlanar>::InterpolationPlanar(const InterpolationOptions& io):Interpolation< InterpolationPlanar<RealPlanar> >(io),_dim_caracteristic(1)
  65
  66   {
  67   }
  68
  69   /**
  70    *  \brief  Function used to set the options for the intersection calculation
  71    * \details The following options can be modified:
  72    *  -# Intersection_type: the type of algorithm to be used in the computation of the cell-cell intersections.
  73    *   - Values: Triangle, Convex.
  74    *   - Default: Triangle.
  75    *  -# Precision: Level of precision of the computations is precision times the characteristic size of the mesh.
  76    *   - Values: positive real number.
  77    *   - Default: 1.0E-12.
  78    *  -# PrintLevel: Level of verboseness during the computations.
  79    *   - Values: interger between 0 and 3.
  80    *   - Default: 0.
  81    */
  82   template<class RealPlanar>
  83   void InterpolationPlanar<RealPlanar>::setOptions(double precision, int printLevel, IntersectionType intersectionType, int orientation)
  84   {
  85     InterpolationOptions::setPrecision(precision);
  86     InterpolationOptions::setPrintLevel(printLevel);
  87     InterpolationOptions::setIntersectionType(intersectionType);
  88     InterpolationOptions::setOrientation(orientation);
  89   }
  90
  91
  92   /** \brief Main function to interpolate triangular or quadrangular meshes.
  93       \details  The algorithm proceeds in two steps: first a filtering process reduces the number of pairs of elements for which the
  94       * calculation must be carried out by eliminating pairs that do not intersect based on their bounding boxes. Then, the
  95       * volume of intersection is calculated by an object of type IntersectorPlanar for the remaining pairs, and entered into the
  96       * intersection matrix.
  97       *
  98       * The matrix is partially sparse : it is a vector of maps of integer - double pairs.
  99       * The length of the vector is equal to the number of target elements - for each target element there is a map, regardless
 100       * of whether the element intersects any source elements or not. But in the maps there are only entries for those source elements
 101       * which have a non-zero intersection volume with the target element. The vector has indices running from
 102       * 0 to (#target elements - 1), meaning that the map for target element i is stored at index i - 1. In the maps, however,
 103       * the indexing is more natural : the intersection volume of the target element i with source element j is found at matrix[i-1][j].
 104       *
 105
 106       * @param myMeshS  Planar source mesh
 107       * @Param myMeshT  Planar target mesh
 108       * @return            vector containing for each element i of the source mesh, a map giving for each element j
 109       *                    of the target mesh which i intersects, the area of the intersection
 110       *
 111       */
 112   template<class RealPlanar>
 113   template<class MyMeshType, class MatrixType>
 114   int InterpolationPlanar<RealPlanar>::interpolateMeshes(const MyMeshType& myMeshS, const MyMeshType& myMeshT, MatrixType& result, const char *method)
 115   {
 116     static const int SPACEDIM=MyMeshType::MY_SPACEDIM;
 117     typedef typename MyMeshType::MyConnType ConnType;
 118     static const NumberingPolicy numPol=MyMeshType::My_numPol;
 119
 120     long global_start =clock();
 121     int counter=0;
 122     /***********************************************************/
 123     /* Check both meshes are made of triangles and quadrangles */
 124     /***********************************************************/
 125
 126     long nbMailleS=myMeshS.getNumberOfElements();
 127     long nbMailleT=myMeshT.getNumberOfElements();
 128
 129     /**************************************************/
 130     /* Search the characteristic size of the meshes   */
 131     /**************************************************/
 132
 133     double BoxS[2*SPACEDIM]; myMeshS.getBoundingBox(BoxS);
 134     double BoxT[2*SPACEDIM]; myMeshT.getBoundingBox(BoxT);
 135     double diagonalS,dimCaracteristicS=std::numeric_limits<double>::max();
 136     if(nbMailleS!=0)
 137       {
 138         diagonalS=getDistanceBtw2Pts<SPACEDIM>(BoxS+SPACEDIM,BoxS);
 139         dimCaracteristicS=diagonalS/nbMailleS;
 140       }
 141     double diagonalT,dimCaracteristicT=std::numeric_limits<double>::max();
 142     if(nbMailleT!=0)
 143       {
 144         diagonalT=getDistanceBtw2Pts<SPACEDIM>(BoxT+SPACEDIM,BoxT);
 145         dimCaracteristicT=diagonalT/nbMailleT;
 146       }
 147
 148     _dim_caracteristic=std::min(dimCaracteristicS, dimCaracteristicT);
 149     if (InterpolationOptions::getPrintLevel()>=1)
 150       {
 151         std::cout << "  - Characteristic size of the source mesh : " << dimCaracteristicS << std::endl;
 152         std::cout << "  - Characteristic size of the target mesh: " << dimCaracteristicT << std::endl;
 153         std::cout << "InterpolationPlanar::computation of the intersections" << std::endl;
 154       }
 155
 156     PlanarIntersector<MyMeshType,MatrixType>* intersector=0;
 157     std::string meth = InterpolationOptions::filterInterpolationMethod(method);
 158     if(meth=="P0P0")
 159       {
 160         switch (InterpolationOptions::getIntersectionType())
 161           {
 162           case Triangulation:
 163             intersector=new TriangulationIntersector<MyMeshType,MatrixType,PlanarIntersectorP0P0>(myMeshT,myMeshS,_dim_caracteristic,
 164                                                                                                   InterpolationOptions::getPrecision(),
 165                                                                                                   InterpolationOptions::getMaxDistance3DSurfIntersect(),
 166                                                                                                   InterpolationOptions::getMedianPlane(),
 167                                                                                                   InterpolationOptions::getOrientation(),
 168                                                                                                   InterpolationOptions::getPrintLevel());
 169             break;
 170           case Convex:
 171             intersector=new ConvexIntersector<MyMeshType,MatrixType,PlanarIntersectorP0P0>(myMeshT,myMeshS,_dim_caracteristic,
 172                                                                                            InterpolationOptions::getPrecision(),
 173                                                                                            InterpolationOptions::getMaxDistance3DSurfIntersect(),
 174                                                                                            InterpolationOptions::getMedianPlane(),
 175                                                                                            InterpolationOptions::getDoRotate(),
 176                                                                                            InterpolationOptions::getOrientation(),
 177                                                                                            InterpolationOptions::getPrintLevel());
 178             break;
 179           case Geometric2D:
 180             intersector=new Geometric2DIntersector<MyMeshType,MatrixType,PlanarIntersectorP0P0>(myMeshT, myMeshS, _dim_caracteristic,
 181                                                                                                 InterpolationOptions::getMaxDistance3DSurfIntersect(),
 182                                                                                                 InterpolationOptions::getMedianPlane(),
 183                                                                                                 InterpolationOptions::getPrecision(),
 184                                                                                                 InterpolationOptions::getOrientation());
 185             break;
 186           case PointLocator:
 187             intersector=new PointLocator2DIntersector<MyMeshType,MatrixType,PlanarIntersectorP0P0>(myMeshT, myMeshS, _dim_caracteristic,
 188                                                                                                    InterpolationOptions::getMaxDistance3DSurfIntersect(),
 189                                                                                                    InterpolationOptions::getMedianPlane(),
 190                                                                                                    InterpolationOptions::getPrecision(),
 191                                                                                                    InterpolationOptions::getOrientation());
 192             break;
 193           default:
 194             throw INTERP_KERNEL::Exception("For P0P0 planar interpolation possibities are : Triangulation, Convex, Geometric2D, PointLocator !");
 195           }
 196       }
 197     else if(meth=="P0P1")
 198       {
 199         switch (InterpolationOptions::getIntersectionType())
 200           {
 201           case Triangulation:
 202             intersector=new TriangulationIntersector<MyMeshType,MatrixType,PlanarIntersectorP0P1>(myMeshT,myMeshS,_dim_caracteristic,
 203                                                                                                   InterpolationOptions::getPrecision(),
 204                                                                                                   InterpolationOptions::getMaxDistance3DSurfIntersect(),
 205                                                                                                   InterpolationOptions::getMedianPlane(),
 206                                                                                                   InterpolationOptions::getOrientation(),
 207                                                                                                   InterpolationOptions::getPrintLevel());
 208             break;
 209           case Convex:
 210             intersector=new ConvexIntersector<MyMeshType,MatrixType,PlanarIntersectorP0P1>(myMeshT,myMeshS,_dim_caracteristic,
 211                                                                                            InterpolationOptions::getPrecision(),
 212                                                                                            InterpolationOptions::getMaxDistance3DSurfIntersect(),
 213                                                                                            InterpolationOptions::getMedianPlane(),
 214                                                                                            InterpolationOptions::getDoRotate(),
 215                                                                                            InterpolationOptions::getOrientation(),
 216                                                                                            InterpolationOptions::getPrintLevel());
 217             break;
 218           case Geometric2D:
 219             intersector=new Geometric2DIntersector<MyMeshType,MatrixType,PlanarIntersectorP0P1>(myMeshT, myMeshS, _dim_caracteristic,
 220                                                                                                 InterpolationOptions::getMaxDistance3DSurfIntersect(),
 221                                                                                                 InterpolationOptions::getMedianPlane(),
 222                                                                                                 InterpolationOptions::getPrecision(),
 223                                                                                                 InterpolationOptions::getOrientation());
 224             break;
 225           case PointLocator:
 226             intersector=new PlanarIntersectorP0P1PL<MyMeshType,MatrixType>(myMeshT, myMeshS, _dim_caracteristic,
 227                                                                            InterpolationOptions::getMaxDistance3DSurfIntersect(),
 228                                                                            InterpolationOptions::getMedianPlane(),
 229                                                                            InterpolationOptions::getPrecision(),
 230                                                                            InterpolationOptions::getOrientation());
 231             break;
 232           default:
 233             throw INTERP_KERNEL::Exception("For P0P1 planar interpolation possibities are : Triangulation, Convex, Geometric2D, PointLocator !");
 234           }
 235       }
 236     else if(meth=="P1P0")
 237       {
 238         switch (InterpolationOptions::getIntersectionType())
 239           {
 240           case Triangulation:
 241             intersector=new TriangulationIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P0>(myMeshT,myMeshS,_dim_caracteristic,
 242                                                                                                   InterpolationOptions::getPrecision(),
 243                                                                                                   InterpolationOptions::getMaxDistance3DSurfIntersect(),
 244                                                                                                   InterpolationOptions::getMedianPlane(),
 245                                                                                                   InterpolationOptions::getOrientation(),
 246                                                                                                   InterpolationOptions::getPrintLevel());
 247             break;
 248           case Convex:
 249             intersector=new ConvexIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P0>(myMeshT,myMeshS,_dim_caracteristic,
 250                                                                                            InterpolationOptions::getPrecision(),
 251                                                                                            InterpolationOptions::getMaxDistance3DSurfIntersect(),
 252                                                                                            InterpolationOptions::getMedianPlane(),
 253                                                                                            InterpolationOptions::getDoRotate(),
 254                                                                                            InterpolationOptions::getOrientation(),
 255                                                                                            InterpolationOptions::getPrintLevel());
 256             break;
 257           case Geometric2D:
 258             intersector=new Geometric2DIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P0>(myMeshT, myMeshS, _dim_caracteristic,
 259                                                                                                 InterpolationOptions::getMaxDistance3DSurfIntersect(),
 260                                                                                                 InterpolationOptions::getMedianPlane(),
 261                                                                                                 InterpolationOptions::getPrecision(),
 262                                                                                                 InterpolationOptions::getOrientation());
 263             break;
 264           case PointLocator:
 265             intersector=new PlanarIntersectorP1P0PL<MyMeshType,MatrixType>(myMeshT, myMeshS, _dim_caracteristic,
 266                                                                        InterpolationOptions::getMaxDistance3DSurfIntersect(),
 267                                                                        InterpolationOptions::getMedianPlane(),
 268                                                                        InterpolationOptions::getPrecision(),
 269                                                                        InterpolationOptions::getOrientation());
 270             break;
 271           case Barycentric:
 272              intersector=new TriangulationIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P0Bary>(myMeshT,myMeshS,_dim_caracteristic,
 273                                                                                                        InterpolationOptions::getPrecision(),
 274                                                                                                        InterpolationOptions::getMaxDistance3DSurfIntersect(),
 275                                                                                                        InterpolationOptions::getMedianPlane(),
 276                                                                                                        InterpolationOptions::getOrientation(),
 277                                                                                                        InterpolationOptions::getPrintLevel());
 278              break;
 279           case BarycentricGeo2D:
 280             intersector=new Geometric2DIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P0Bary>(myMeshT, myMeshS, _dim_caracteristic,
 281                                                                                                     InterpolationOptions::getMaxDistance3DSurfIntersect(),
 282                                                                                                     InterpolationOptions::getMedianPlane(),
 283                                                                                                     InterpolationOptions::getPrecision(),
 284                                                                                                     InterpolationOptions::getOrientation());
 285             break;
 286           }
 287       }
 288     else if(meth=="P1P1")
 289       {
 290         switch (InterpolationOptions::getIntersectionType())
 291           {
 292           case Triangulation:
 293             intersector=new TriangulationIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P1>(myMeshT,myMeshS,_dim_caracteristic,
 294                                                                                                   InterpolationOptions::getPrecision(),
 295                                                                                                   InterpolationOptions::getMaxDistance3DSurfIntersect(),
 296                                                                                                   InterpolationOptions::getMedianPlane(),
 297                                                                                                   InterpolationOptions::getOrientation(),
 298                                                                                                   InterpolationOptions::getPrintLevel());
 299             break;
 300           case Convex:
 301             intersector=new ConvexIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P1>(myMeshT,myMeshS,_dim_caracteristic,
 302                                                                                            InterpolationOptions::getPrecision(),
 303                                                                                            InterpolationOptions::getMaxDistance3DSurfIntersect(),
 304                                                                                            InterpolationOptions::getMedianPlane(),
 305                                                                                            InterpolationOptions::getDoRotate(),
 306                                                                                            InterpolationOptions::getOrientation(),
 307                                                                                            InterpolationOptions::getPrintLevel());
 308             break;
 309           case Geometric2D:
 310             intersector=new Geometric2DIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P1>(myMeshT, myMeshS, _dim_caracteristic,
 311                                                                                                 InterpolationOptions::getMaxDistance3DSurfIntersect(),
 312                                                                                                 InterpolationOptions::getMedianPlane(),
 313                                                                                                 InterpolationOptions::getPrecision(),
 314                                                                                                 InterpolationOptions::getOrientation());
 315             break;
 316           case PointLocator:
 317             intersector=new PlanarIntersectorP1P1PL<MyMeshType,MatrixType>(myMeshT, myMeshS, _dim_caracteristic,
 318                                                                            InterpolationOptions::getMaxDistance3DSurfIntersect(),
 319                                                                            InterpolationOptions::getMedianPlane(),
 320                                                                            InterpolationOptions::getPrecision(),
 321                                                                            InterpolationOptions::getOrientation());
 322             break;
 323           default:
 324             throw INTERP_KERNEL::Exception("For P1P1 planar interpolation possibities are : Triangulation, Convex, Geometric2D, PointLocator !");
 325           }
 326       }
 327     else
 328       throw INTERP_KERNEL::Exception("Invalid method specified or intersection type ! Must be in : \"P0P0\" \"P0P1\" \"P1P0\" or \"P1P1\"");
 329     /****************************************************************/
 330     /* Create a search tree based on the bounding boxes             */
 331     /* Instanciate the intersector and initialise the result vector */
 332     /****************************************************************/
 333
 334     long start_filtering=clock();
 335
 336     std::vector<double> bbox;
 337     intersector->createBoundingBoxes(myMeshS,bbox); // create the bounding boxes
 338     performAdjustmentOfBB(intersector,bbox);
 339     const double *bboxPtr=0;
 340     if(nbMailleS>0)
 341       bboxPtr=&bbox[0];
 342     BBTree<SPACEDIM,ConnType> my_tree(bboxPtr, 0, 0,nbMailleS);//creating the search structure
 343
 344     long end_filtering=clock();
 345
 346     result.resize(intersector->getNumberOfRowsOfResMatrix());//on initialise.
 347
 348     /****************************************************/
 349     /* Loop on the target cells - core of the algorithm */
 350     /****************************************************/
 351     long start_intersection=clock();
 352     long nbelem_type=myMeshT.getNumberOfElements();
 353     const ConnType *connIndxT=myMeshT.getConnectivityIndexPtr();
 354     for(int iT=0; iT<nbelem_type; iT++)
 355       {
 356         int nb_nodesT=connIndxT[iT+1]-connIndxT[iT];
 357         std::vector<int> intersecting_elems;
 358         double bb[2*SPACEDIM];
 359         intersector->getElemBB(bb,myMeshT,OTT<ConnType,numPol>::indFC(iT),nb_nodesT);
 360         my_tree.getIntersectingElems(bb, intersecting_elems);
 361         intersector->intersectCells(iT,intersecting_elems,result);
 362         counter+=intersecting_elems.size();
 363         intersecting_elems.clear();
 364       }
 365     int ret=intersector->getNumberOfColsOfResMatrix();
 366     delete intersector;
 367
 368     if (InterpolationOptions::getPrintLevel() >=1)
 369       {
 370         long end_intersection=clock();
 371         std::cout << "Filtering time= " << end_filtering-start_filtering << std::endl;
 372         std::cout << "Intersection time= " << end_intersection-start_intersection << std::endl;
 373         long global_end =clock();
 374         std::cout << "Number of computed intersections = " << counter << std::endl;
 375         std::cout << "Global time= " << global_end - global_start << std::endl;
 376       }
 377     return ret;
 378   }
 379 }
 380
 381 #endif