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           }
 194       }
 195     else if(meth=="P0P1")
 196       {
 197         switch (InterpolationOptions::getIntersectionType())
 198           {
 199           case Triangulation:
 200             intersector=new TriangulationIntersector<MyMeshType,MatrixType,PlanarIntersectorP0P1>(myMeshT,myMeshS,_dim_caracteristic,
 201                                                                                                   InterpolationOptions::getPrecision(),
 202                                                                                                   InterpolationOptions::getMaxDistance3DSurfIntersect(),
 203                                                                                                   InterpolationOptions::getMedianPlane(),
 204                                                                                                   InterpolationOptions::getOrientation(),
 205                                                                                                   InterpolationOptions::getPrintLevel());
 206             break;
 207           case Convex:
 208             intersector=new ConvexIntersector<MyMeshType,MatrixType,PlanarIntersectorP0P1>(myMeshT,myMeshS,_dim_caracteristic,
 209                                                                                            InterpolationOptions::getPrecision(),
 210                                                                                            InterpolationOptions::getMaxDistance3DSurfIntersect(),
 211                                                                                            InterpolationOptions::getMedianPlane(),
 212                                                                                            InterpolationOptions::getDoRotate(),
 213                                                                                            InterpolationOptions::getOrientation(),
 214                                                                                            InterpolationOptions::getPrintLevel());
 215             break;
 216           case Geometric2D:
 217             intersector=new Geometric2DIntersector<MyMeshType,MatrixType,PlanarIntersectorP0P1>(myMeshT, myMeshS, _dim_caracteristic,
 218                                                                                                 InterpolationOptions::getMaxDistance3DSurfIntersect(),
 219                                                                                                 InterpolationOptions::getMedianPlane(),
 220                                                                                                 InterpolationOptions::getPrecision(),
 221                                                                                                 InterpolationOptions::getOrientation());
 222             break;
 223           case PointLocator:
 224             intersector=new PlanarIntersectorP0P1PL<MyMeshType,MatrixType>(myMeshT, myMeshS, _dim_caracteristic,
 225                                                                            InterpolationOptions::getMaxDistance3DSurfIntersect(),
 226                                                                            InterpolationOptions::getMedianPlane(),
 227                                                                            InterpolationOptions::getPrecision(),
 228                                                                            InterpolationOptions::getOrientation());
 229             break;
 230           }
 231       }
 232     else if(meth=="P1P0")
 233       {
 234         switch (InterpolationOptions::getIntersectionType())
 235           {
 236           case Triangulation:
 237             intersector=new TriangulationIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P0>(myMeshT,myMeshS,_dim_caracteristic,
 238                                                                                                   InterpolationOptions::getPrecision(),
 239                                                                                                   InterpolationOptions::getMaxDistance3DSurfIntersect(),
 240                                                                                                   InterpolationOptions::getMedianPlane(),
 241                                                                                                   InterpolationOptions::getOrientation(),
 242                                                                                                   InterpolationOptions::getPrintLevel());
 243             break;
 244           case Convex:
 245             intersector=new ConvexIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P0>(myMeshT,myMeshS,_dim_caracteristic,
 246                                                                                            InterpolationOptions::getPrecision(),
 247                                                                                            InterpolationOptions::getMaxDistance3DSurfIntersect(),
 248                                                                                            InterpolationOptions::getMedianPlane(),
 249                                                                                            InterpolationOptions::getDoRotate(),
 250                                                                                            InterpolationOptions::getOrientation(),
 251                                                                                            InterpolationOptions::getPrintLevel());
 252             break;
 253           case Geometric2D:
 254             intersector=new Geometric2DIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P0>(myMeshT, myMeshS, _dim_caracteristic,
 255                                                                                                 InterpolationOptions::getMaxDistance3DSurfIntersect(),
 256                                                                                                 InterpolationOptions::getMedianPlane(),
 257                                                                                                 InterpolationOptions::getPrecision(),
 258                                                                                                 InterpolationOptions::getOrientation());
 259             break;
 260           case PointLocator:
 261             intersector=new PlanarIntersectorP1P0PL<MyMeshType,MatrixType>(myMeshT, myMeshS, _dim_caracteristic,
 262                                                                        InterpolationOptions::getMaxDistance3DSurfIntersect(),
 263                                                                        InterpolationOptions::getMedianPlane(),
 264                                                                        InterpolationOptions::getPrecision(),
 265                                                                        InterpolationOptions::getOrientation());
 266             break;
 267           case Barycentric:
 268              intersector=new TriangulationIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P0Bary>(myMeshT,myMeshS,_dim_caracteristic,
 269                                                                                                        InterpolationOptions::getPrecision(),
 270                                                                                                        InterpolationOptions::getMaxDistance3DSurfIntersect(),
 271                                                                                                        InterpolationOptions::getMedianPlane(),
 272                                                                                                        InterpolationOptions::getOrientation(),
 273                                                                                                        InterpolationOptions::getPrintLevel());
 274              break;
 275           case BarycentricGeo2D:
 276             intersector=new Geometric2DIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P0Bary>(myMeshT, myMeshS, _dim_caracteristic,
 277                                                                                                     InterpolationOptions::getMaxDistance3DSurfIntersect(),
 278                                                                                                     InterpolationOptions::getMedianPlane(),
 279                                                                                                     InterpolationOptions::getPrecision(),
 280                                                                                                     InterpolationOptions::getOrientation());
 281             break;
 282           }
 283       }
 284     else if(meth=="P1P1")
 285       {
 286         switch (InterpolationOptions::getIntersectionType())
 287           {
 288           case Triangulation:
 289             intersector=new TriangulationIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P1>(myMeshT,myMeshS,_dim_caracteristic,
 290                                                                                                   InterpolationOptions::getPrecision(),
 291                                                                                                   InterpolationOptions::getMaxDistance3DSurfIntersect(),
 292                                                                                                   InterpolationOptions::getMedianPlane(),
 293                                                                                                   InterpolationOptions::getOrientation(),
 294                                                                                                   InterpolationOptions::getPrintLevel());
 295             break;
 296           case Convex:
 297             intersector=new ConvexIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P1>(myMeshT,myMeshS,_dim_caracteristic,
 298                                                                                            InterpolationOptions::getPrecision(),
 299                                                                                            InterpolationOptions::getMaxDistance3DSurfIntersect(),
 300                                                                                            InterpolationOptions::getMedianPlane(),
 301                                                                                            InterpolationOptions::getDoRotate(),
 302                                                                                            InterpolationOptions::getOrientation(),
 303                                                                                            InterpolationOptions::getPrintLevel());
 304             break;
 305           case Geometric2D:
 306             intersector=new Geometric2DIntersector<MyMeshType,MatrixType,PlanarIntersectorP1P1>(myMeshT, myMeshS, _dim_caracteristic,
 307                                                                                                 InterpolationOptions::getMaxDistance3DSurfIntersect(),
 308                                                                                                 InterpolationOptions::getMedianPlane(),
 309                                                                                                 InterpolationOptions::getPrecision(),
 310                                                                                                 InterpolationOptions::getOrientation());
 311             break;
 312           case PointLocator:
 313             intersector=new PlanarIntersectorP1P1PL<MyMeshType,MatrixType>(myMeshT, myMeshS, _dim_caracteristic,
 314                                                                            InterpolationOptions::getMaxDistance3DSurfIntersect(),
 315                                                                            InterpolationOptions::getMedianPlane(),
 316                                                                            InterpolationOptions::getPrecision(),
 317                                                                            InterpolationOptions::getOrientation());
 318             break;
 319           }
 320       }
 321     else
 322       throw INTERP_KERNEL::Exception("Invalid method specified or intersection type ! Must be in : \"P0P0\" \"P0P1\" \"P1P0\" or \"P1P1\"");
 323     /****************************************************************/
 324     /* Create a search tree based on the bounding boxes             */
 325     /* Instanciate the intersector and initialise the result vector */
 326     /****************************************************************/
 327
 328     long start_filtering=clock();
 329
 330     std::vector<double> bbox;
 331     intersector->createBoundingBoxes(myMeshS,bbox); // create the bounding boxes
 332     performAdjustmentOfBB(intersector,bbox);
 333     const double *bboxPtr=0;
 334     if(nbMailleS>0)
 335       bboxPtr=&bbox[0];
 336     BBTree<SPACEDIM,ConnType> my_tree(bboxPtr, 0, 0,nbMailleS);//creating the search structure
 337
 338     long end_filtering=clock();
 339
 340     result.resize(intersector->getNumberOfRowsOfResMatrix());//on initialise.
 341
 342     /****************************************************/
 343     /* Loop on the target cells - core of the algorithm */
 344     /****************************************************/
 345     long start_intersection=clock();
 346     long nbelem_type=myMeshT.getNumberOfElements();
 347     const ConnType *connIndxT=myMeshT.getConnectivityIndexPtr();
 348     for(int iT=0; iT<nbelem_type; iT++)
 349       {
 350         int nb_nodesT=connIndxT[iT+1]-connIndxT[iT];
 351         std::vector<int> intersecting_elems;
 352         double bb[2*SPACEDIM];
 353         intersector->getElemBB(bb,myMeshT,OTT<ConnType,numPol>::indFC(iT),nb_nodesT);
 354         my_tree.getIntersectingElems(bb, intersecting_elems);
 355         intersector->intersectCells(iT,intersecting_elems,result);
 356         counter+=intersecting_elems.size();
 357         intersecting_elems.clear();
 358       }
 359     int ret=intersector->getNumberOfColsOfResMatrix();
 360     delete intersector;
 361
 362     if (InterpolationOptions::getPrintLevel() >=1)
 363       {
 364         long end_intersection=clock();
 365         std::cout << "Filtering time= " << end_filtering-start_filtering << std::endl;
 366         std::cout << "Intersection time= " << end_intersection-start_intersection << std::endl;
 367         long global_end =clock();
 368         std::cout << "Number of computed intersections = " << counter << std::endl;
 369         std::cout << "Global time= " << global_end - global_start << std::endl;
 370       }
 371     return ret;
 372   }
 373 }
 374
 375 #endif