1 // Copyright (C) 2007-2013 CEA/DEN, EDF R&D
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.
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.
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
17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
19 // Author : Anthony Geay (CEA/DEN)
21 #include "MEDCouplingMesh.hxx"
22 #include "MEDCouplingUMesh.hxx"
23 #include "MEDCouplingMemArray.hxx"
24 #include "MEDCouplingFieldDouble.hxx"
25 #include "MEDCouplingFieldDiscretization.hxx"
26 #include "MEDCouplingAutoRefCountObjectPtr.hxx"
34 using namespace ParaMEDMEM;
36 MEDCouplingMesh::MEDCouplingMesh():_time(0.),_iteration(-1),_order(-1)
40 MEDCouplingMesh::MEDCouplingMesh(const MEDCouplingMesh& other):_name(other._name),_description(other._description),
41 _time(other._time),_iteration(other._iteration),
42 _order(other._order),_time_unit(other._time_unit)
46 std::size_t MEDCouplingMesh::getHeapMemorySize() const
48 return _name.capacity()+_description.capacity()+_time_unit.capacity();
52 * This method is only for ParaMEDMEM in ParaFIELD constructor.
54 bool MEDCouplingMesh::isStructured() const
56 return getType()==CARTESIAN;
59 bool MEDCouplingMesh::isEqualIfNotWhy(const MEDCouplingMesh *other, double prec, std::string& reason) const throw(INTERP_KERNEL::Exception)
62 throw INTERP_KERNEL::Exception("MEDCouplingMesh::isEqualIfNotWhy : other instance is NULL !");
63 std::ostringstream oss; oss.precision(15);
64 if(_name!=other->_name)
66 oss << "Mesh names differ : this name = \"" << _name << "\" and other name = \"" << other->_name << "\" !";
70 if(_description!=other->_description)
72 oss << "Mesh descriptions differ : this description = \"" << _description << "\" and other description = \"" << other->_description << "\" !";
76 if(_iteration!=other->_iteration)
78 oss << "Mesh iterations differ : this iteration = \"" << _iteration << "\" and other iteration = \"" << other->_iteration << "\" !";
82 if(_order!=other->_order)
84 oss << "Mesh orders differ : this order = \"" << _order << "\" and other order = \"" << other->_order << "\" !";
88 if(_time_unit!=other->_time_unit)
90 oss << "Mesh time units differ : this time unit = \"" << _time_unit << "\" and other time unit = \"" << other->_time_unit << "\" !";
94 if(fabs(_time-other->_time)>=1e-12)
96 oss << "Mesh times differ : this time = \"" << _time << "\" and other time = \"" << other->_time << "\" !";
104 * Checks if \a this and another MEDCouplingMesh are fully equal.
105 * \param [in] other - an instance of MEDCouplingMesh to compare with \a this one.
106 * \param [in] prec - precision value used to compare node coordinates.
107 * \return bool - \c true if the two meshes are equal, \c false else.
109 bool MEDCouplingMesh::isEqual(const MEDCouplingMesh *other, double prec) const throw(INTERP_KERNEL::Exception)
112 return isEqualIfNotWhy(other,prec,tmp);
116 * This method checks geo equivalence between two meshes : 'this' and 'other'.
117 * If no exception is throw 'this' and 'other' are geometrically equivalent regarding 'levOfCheck' level.
118 * This method is typically used to change the mesh of a field "safely" depending the 'levOfCheck' level considered.
119 * So in case of success cell \c other[i] is equal to cell \c this[cellCor[i]]. If \a cellCor is null it means that for all i cell \c other[i] is equal to cell \c this[i].
121 * @param levOfCheck input that specifies the level of check specified. The possible values are listed below.
122 * @param prec input that specifies precision for double float data used for comparison in meshes.
123 * @param cellCor output array not always informed (depending 'levOfCheck' param) that gives the corresponding array for cells from 'other' to 'this'.
124 * @param nodeCor output array not always informed (depending 'levOfCheck' param) that gives the corresponding array for nodes from 'other' to 'this'.
126 * Possible values for levOfCheck :
127 * - 0 for strict equality. This is the strongest level. 'cellCor' and 'nodeCor' params are never informed.
128 * - 10,11,12 for less strict equality. Two meshes are compared geometrically. In case of success 'cellCor' and 'nodeCor' are informed. Warning ! These equivalences are CPU/Mem costly. The 3 values correspond respectively to policy used for cell comparison (see MEDCouplingUMesh::zipConnectivityTraducer to have more details)
129 * - 20,21,22, for less strict equality. Two meshes are compared geometrically. The difference with the previous version is that nodes(coordinates) are expected to be the same between this and other. In case of success 'cellCor' is informed. Warning ! These equivalences are CPU/Mem costly. The 3 values correspond respectively to policy used for cell comparison (see MEDCouplingUMesh::zipConnectivityTraducer to have more details)
130 * - 1 for fast 'equality'. This is a lazy level. Just number of cells and number of nodes are considered here and 3 cells (begin,middle,end)
131 * - 2 for deep 'equality' as 0 option except that no control is done on all strings in mesh.
133 void MEDCouplingMesh::checkGeoEquivalWith(const MEDCouplingMesh *other, int levOfCheck, double prec,
134 DataArrayInt *&cellCor, DataArrayInt *&nodeCor) const throw(INTERP_KERNEL::Exception)
144 if(!isEqual(other,prec))
145 throw INTERP_KERNEL::Exception("checkGeoFitWith : Meshes are not equal !");
152 checkDeepEquivalWith(other,levOfCheck-10,prec,cellCor,nodeCor);
159 checkDeepEquivalOnSameNodesWith(other,levOfCheck-20,prec,cellCor);
164 checkFastEquivalWith(other,prec);
169 if(!isEqualWithoutConsideringStr(other,prec))
170 throw INTERP_KERNEL::Exception("checkGeoFitWith : Meshes are not equal without considering strings !");
174 throw INTERP_KERNEL::Exception("checkGeoFitWith : Invalid levOfCheck specified ! Value must be in 0,1,2,10,11 or 12.");
179 * Finds cells whose all nodes are in a given array of node ids.
180 * \param [in] partBg - the array of node ids.
181 * \param [in] partEnd - end of \a partBg, i.e. a pointer to a (last+1)-th element
183 * \return DataArrayInt * - a new instance of DataArrayInt holding ids of found
184 * cells. The caller is to delete this array using decrRef() as it is no
187 DataArrayInt *MEDCouplingMesh::getCellIdsFullyIncludedInNodeIds(const int *partBg, const int *partEnd) const
189 std::vector<int> crest;
190 std::set<int> p(partBg,partEnd);
191 int nbOfCells=getNumberOfCells();
192 for(int i=0;i<nbOfCells;i++)
194 std::vector<int> conn;
195 getNodeIdsOfCell(i,conn);
197 for(std::vector<int>::const_iterator iter=conn.begin();iter!=conn.end() && cont;iter++)
198 if(p.find(*iter)==p.end())
203 DataArrayInt *ret=DataArrayInt::New();
204 ret->alloc((int)crest.size(),1);
205 std::copy(crest.begin(),crest.end(),ret->getPointer());
210 * This method checks fastly that 'this' and 'other' are equal. All common checks are done here.
212 void MEDCouplingMesh::checkFastEquivalWith(const MEDCouplingMesh *other, double prec) const throw(INTERP_KERNEL::Exception)
214 if(getMeshDimension()!=other->getMeshDimension())
215 throw INTERP_KERNEL::Exception("checkFastEquivalWith : Mesh dimensions are not equal !");
216 if(getSpaceDimension()!=other->getSpaceDimension())
217 throw INTERP_KERNEL::Exception("checkFastEquivalWith : Space dimensions are not equal !");
218 if(getNumberOfCells()!=other->getNumberOfCells())
219 throw INTERP_KERNEL::Exception("checkFastEquivalWith : number of cells are not equal !");
223 * This method is very poor and looks only if 'this' and 'other' are candidate for merge of fields lying repectively on them.
225 bool MEDCouplingMesh::areCompatibleForMerge(const MEDCouplingMesh *other) const
227 if(getMeshDimension()!=other->getMeshDimension())
229 if(getSpaceDimension()!=other->getSpaceDimension())
235 * This method is equivalent to MEDCouplingMesh::buildPart method except that here the cell ids are specified using slice \a beginCellIds \a endCellIds and \a stepCellIds.
237 * \sa MEDCouplingMesh::buildPart
239 MEDCouplingMesh *MEDCouplingMesh::buildPartRange(int beginCellIds, int endCellIds, int stepCellIds) const throw(INTERP_KERNEL::Exception)
241 MEDCouplingAutoRefCountObjectPtr<DataArrayInt> cellIds=DataArrayInt::Range(beginCellIds,endCellIds,stepCellIds);
242 return buildPart(cellIds->begin(),cellIds->end());
246 * This method is equivalent to MEDCouplingMesh::buildPartAndReduceNodes method except that here the cell ids are specified using slice \a beginCellIds \a endCellIds and \a stepCellIds.
248 * \sa MEDCouplingMesh::buildPartAndReduceNodes
250 MEDCouplingMesh *MEDCouplingMesh::buildPartRangeAndReduceNodes(int beginCellIds, int endCellIds, int stepCellIds, int& beginOut, int& endOut, int& stepOut, DataArrayInt*& arr) const throw(INTERP_KERNEL::Exception)
252 MEDCouplingAutoRefCountObjectPtr<DataArrayInt> cellIds=DataArrayInt::Range(beginCellIds,endCellIds,stepCellIds);
253 return buildPartAndReduceNodes(cellIds->begin(),cellIds->end(),arr);
257 * This method builds a field lying on 'this' with 'nbOfComp' components.
258 * 'func' is a pointer that points to a function that takes 2 arrays in parameter and returns a boolean.
259 * The first array is a in-param of size this->getSpaceDimension and the second an out param of size 'nbOfComp'.
260 * The return field will have type specified by 't'. 't' is also used to determine where values of field will be
262 * Contrary to other fillFromAnalytic methods this method requests a C++ function pointer as input.
263 * The 'func' is a callback that takes as first parameter an input array of size 'this->getSpaceDimension()',
264 * the second parameter is a pointer on a valid zone of size at least equal to 'nbOfComp' values. And too finish
265 * the returned value is a boolean that is equal to False in case of invalid evaluation (log(0) for example...)
266 * @param t type of field returned and specifies where the evaluation of func will be done.
267 * @param nbOfComp number of components of returned field.
268 * @param func pointer to a function that should return false if the evaluation failed. (division by 0. for example)
269 * @return field with counter = 1.
271 MEDCouplingFieldDouble *MEDCouplingMesh::fillFromAnalytic(TypeOfField t, int nbOfComp, FunctionToEvaluate func) const
273 MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=MEDCouplingFieldDouble::New(t,ONE_TIME);
275 ret->fillFromAnalytic(nbOfComp,func);
276 ret->synchronizeTimeWithSupport();
281 * This method copyies all tiny strings from other (name and components name).
282 * @throw if other and this have not same mesh type.
284 void MEDCouplingMesh::copyTinyStringsFrom(const MEDCouplingMesh *other) throw(INTERP_KERNEL::Exception)
287 _description=other->_description;
288 _time_unit=other->_time_unit;
292 * This method copies all attributes that are \b NOT arrays in this.
293 * All tiny attributes not usefully for state of 'this' are ignored.
295 void MEDCouplingMesh::copyTinyInfoFrom(const MEDCouplingMesh *other) throw(INTERP_KERNEL::Exception)
297 copyTinyStringsFrom(other);
299 _iteration=other->_iteration;
300 _order=other->_order;
304 * \anchor mcmesh_fillFromAnalytic
305 * Creates a new MEDCouplingFieldDouble of a given type, one time, with given number of
306 * components, lying on \a this mesh, with contents got by applying a specified
307 * function to coordinates of field location points (defined by the given field type).
308 * For example, if \a t == ParaMEDMEM::ON_CELLS, the function is applied to cell
310 * For more info on supported expressions that can be used in the function, see \ref
311 * MEDCouplingArrayApplyFuncExpr. The function can include arbitrary named variables
312 * (e.g. "x","y" or "va44") to refer to components of point coordinates. Names of
313 * variables are sorted in \b alphabetical \b order to associate a variable name with a
314 * component. For example, in the expression "2*x+z", "x" stands for the component #0
315 * and "z" stands for the component #1 (\b not #2)!<br>
316 * In a general case, a value resulting from the function evaluation is assigned to all
317 * components of the field. But there is a possibility to have its own expression for
318 * each component within one function. For this purpose, there are predefined variable
319 * names (IVec, JVec, KVec, LVec etc) each dedicated to a certain component (IVec, to
320 * the component #0 etc). A factor of such a variable is added to the
321 * corresponding component only.<br>
322 * For example, \a nbOfComp == 4, \a this->getSpaceDimension() == 3, coordinates of a
323 * point are (1.,3.,7.), then
324 * - "2*x + z" produces (5.,5.,5.,5.)
325 * - "2*x + 0*y + z" produces (9.,9.,9.,9.)
326 * - "2*x*IVec + (x+z)*LVec" produces (2.,0.,0.,4.)
327 * - "2*y*IVec + z*KVec + x" produces (7.,1.,1.,4.)
329 * \param [in] t - the field type. It defines, apart from other things, points to
330 * coordinates of which the function is applied to get field values.
331 * \param [in] nbOfComp - the number of components in the result field.
332 * \param [in] func - a string defining the expression which is evaluated to get
334 * \return MEDCouplingFieldDouble * - a new instance of MEDCouplingFieldDouble. The
335 * caller is to delete this field using decrRef() as it is no more needed.
336 * \throw If the nodal connectivity of cells is not defined.
337 * \throw If computing \a func fails.
339 * \ref cpp_mcmesh_fillFromAnalytic "Here is a C++ example".<br>
340 * \ref py_mcmesh_fillFromAnalytic "Here is a Python example".
342 MEDCouplingFieldDouble *MEDCouplingMesh::fillFromAnalytic(TypeOfField t, int nbOfComp, const char *func) const
344 MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=MEDCouplingFieldDouble::New(t,ONE_TIME);
346 ret->fillFromAnalytic(nbOfComp,func);
347 ret->synchronizeTimeWithSupport();
352 * Creates a new MEDCouplingFieldDouble of a given type, one time, with given number of
353 * components, lying on \a this mesh, with contents got by applying a specified
354 * function to coordinates of field location points (defined by the given field type).
355 * For example, if \a t == ParaMEDMEM::ON_CELLS, the function is applied to cell
356 * barycenters. This method differs from
357 * \ref MEDCouplingMesh::fillFromAnalytic(TypeOfField t, int nbOfComp, const char *func) const "fillFromAnalytic()"
358 * by the way how variable
359 * names, used in the function, are associated with components of coordinates of field
360 * location points; here, a variable name corresponding to a component is retrieved from
361 * a corresponding node coordinates array (where it is set via
362 * DataArrayDouble::setInfoOnComponent()).<br>
363 * For more info on supported expressions that can be used in the function, see \ref
364 * MEDCouplingArrayApplyFuncExpr. <br>
365 * In a general case, a value resulting from the function evaluation is assigned to all
366 * components of a field value. But there is a possibility to have its own expression for
367 * each component within one function. For this purpose, there are predefined variable
368 * names (IVec, JVec, KVec, LVec etc) each dedicated to a certain component (IVec, to
369 * the component #0 etc). A factor of such a variable is added to the
370 * corresponding component only.<br>
371 * For example, \a nbOfComp == 4, \a this->getSpaceDimension() == 3, names of
372 * spatial components are "x", "y" and "z", coordinates of a
373 * point are (1.,3.,7.), then
374 * - "2*x + z" produces (9.,9.,9.,9.)
375 * - "2*x*IVec + (x+z)*LVec" produces (2.,0.,0.,8.)
376 * - "2*y*IVec + z*KVec + x" produces (7.,1.,1.,8.)
378 * \param [in] t - the field type. It defines, apart from other things, the points to
379 * coordinates of which the function is applied to get field values.
380 * \param [in] nbOfComp - the number of components in the result field.
381 * \param [in] func - a string defining the expression which is evaluated to get
383 * \return MEDCouplingFieldDouble * - a new instance of MEDCouplingFieldDouble. The
384 * caller is to delete this field using decrRef() as it is no more needed.
385 * \throw If the node coordinates are not defined.
386 * \throw If the nodal connectivity of cells is not defined.
387 * \throw If computing \a func fails.
389 * \ref cpp_mcmesh_fillFromAnalytic2 "Here is a C++ example".<br>
390 * \ref py_mcmesh_fillFromAnalytic2 "Here is a Python example".
392 MEDCouplingFieldDouble *MEDCouplingMesh::fillFromAnalytic2(TypeOfField t, int nbOfComp, const char *func) const
394 MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=MEDCouplingFieldDouble::New(t,ONE_TIME);
396 ret->fillFromAnalytic2(nbOfComp,func);
397 ret->synchronizeTimeWithSupport();
402 * Creates a new MEDCouplingFieldDouble of a given type, one time, with given number of
403 * components, lying on \a this mesh, with contents got by applying a specified
404 * function to coordinates of field location points (defined by the given field type).
405 * For example, if \a t == ParaMEDMEM::ON_CELLS, the function is applied to cell
406 * barycenters. This method differs from \ref \ref mcmesh_fillFromAnalytic
407 * "fillFromAnalytic()" by the way how variable
408 * names, used in the function, are associated with components of coordinates of field
409 * location points; here, a component index of a variable is defined by a
410 * rank of the variable within the input array \a varsOrder.<br>
411 * For more info on supported expressions that can be used in the function, see \ref
412 * MEDCouplingArrayApplyFuncExpr.
413 * In a general case, a value resulting from the function evaluation is assigned to all
414 * components of the field. But there is a possibility to have its own expression for
415 * each component within one function. For this purpose, there are predefined variable
416 * names (IVec, JVec, KVec, LVec etc) each dedicated to a certain component (IVec, to
417 * the component #0 etc). A factor of such a variable is added to the
418 * corresponding component only.<br>
419 * For example, \a nbOfComp == 4, \a this->getSpaceDimension() == 3, names of
420 * spatial components are given in \a varsOrder: ["x", "y","z"], coordinates of a
421 * point are (1.,3.,7.), then
422 * - "2*x + z" produces (9.,9.,9.,9.)
423 * - "2*x*IVec + (x+z)*LVec" produces (2.,0.,0.,8.)
424 * - "2*y*IVec + z*KVec + x" produces (7.,1.,1.,8.)
426 * \param [in] t - the field type. It defines, apart from other things, the points to
427 * coordinates of which the function is applied to get field values.
428 * \param [in] nbOfComp - the number of components in the result field.
429 * \param [in] varsOrder - the vector defining names of variables used to refer to
430 * components of coordinates of field location points. A variable named
431 * varsOrder[0] refers to the component #0 etc.
432 * \param [in] func - a string defining the expression which is evaluated to get
434 * \return MEDCouplingFieldDouble * - a new instance of MEDCouplingFieldDouble. The
435 * caller is to delete this field using decrRef() as it is no more needed.
436 * \throw If the node coordinates are not defined.
437 * \throw If the nodal connectivity of cells is not defined.
438 * \throw If computing \a func fails.
440 * \ref cpp_mcmesh_fillFromAnalytic3 "Here is a C++ example".<br>
441 * \ref py_mcmesh_fillFromAnalytic3 "Here is a Python example".
443 MEDCouplingFieldDouble *MEDCouplingMesh::fillFromAnalytic3(TypeOfField t, int nbOfComp, const std::vector<std::string>& varsOrder, const char *func) const
445 MEDCouplingAutoRefCountObjectPtr<MEDCouplingFieldDouble> ret=MEDCouplingFieldDouble::New(t,ONE_TIME);
447 ret->fillFromAnalytic3(nbOfComp,varsOrder,func);
448 ret->synchronizeTimeWithSupport();
453 * Creates a new MEDCouplingMesh by concatenating two given meshes, if possible.
455 * the first mesh precede cells and nodes of the second mesh within the result mesh.
456 * The meshes must be of the same mesh type, else, an exception is thrown. The method
457 * MergeMeshes(), accepting a vector of input meshes, has no such a limitation.
458 * \param [in] mesh1 - the first mesh.
459 * \param [in] mesh2 - the second mesh.
460 * \return MEDCouplingMesh * - the result mesh. It is a new instance of
461 * MEDCouplingMesh. The caller is to delete this mesh using decrRef() as it
463 * \throw If the meshes are of different mesh type.
465 MEDCouplingMesh *MEDCouplingMesh::MergeMeshes(const MEDCouplingMesh *mesh1, const MEDCouplingMesh *mesh2) throw(INTERP_KERNEL::Exception)
468 throw INTERP_KERNEL::Exception("MEDCouplingMesh::MergeMeshes : first parameter is an empty mesh !");
470 throw INTERP_KERNEL::Exception("MEDCouplingMesh::MergeMeshes : second parameter is an empty mesh !");
471 return mesh1->mergeMyselfWith(mesh2);
475 * Creates a new MEDCouplingMesh by concatenating all given meshes, if possible.
477 * the *i*-th mesh precede cells and nodes of the (*i*+1)-th mesh within the result mesh.
478 * This method performs a systematic conversion to unstructured meshes before
479 * performing aggregation contrary to the other MergeMeshes()
480 * with two parameters that works only on the same type of meshes. So here it is possible
481 * to mix different type of meshes.
482 * \param [in] meshes - a vector of meshes to concatenate.
483 * \return MEDCouplingMesh * - the result mesh. It is a new instance of
484 * MEDCouplingUMesh. The caller is to delete this mesh using decrRef() as it
486 * \throw If \a meshes.size() == 0.
487 * \throw If \a size[ *i* ] == NULL.
488 * \throw If the coordinates is not set in none of the meshes.
489 * \throw If \a meshes[ *i* ]->getMeshDimension() < 0.
490 * \throw If the \a meshes are of different dimension (getMeshDimension()).
492 MEDCouplingMesh *MEDCouplingMesh::MergeMeshes(std::vector<const MEDCouplingMesh *>& meshes) throw(INTERP_KERNEL::Exception)
494 std::vector< MEDCouplingAutoRefCountObjectPtr<MEDCouplingUMesh> > ms1(meshes.size());
495 std::vector< const MEDCouplingUMesh * > ms2(meshes.size());
496 for(std::size_t i=0;i<meshes.size();i++)
500 MEDCouplingUMesh *cur=meshes[i]->buildUnstructured();
501 ms1[i]=cur; ms2[i]=cur;
505 std::ostringstream oss; oss << "MEDCouplingMesh::MergeMeshes(std::vector<const MEDCouplingMesh *>& meshes) : mesh at pos #" << i << " of input vector of size " << meshes.size() << " is empty !";
506 throw INTERP_KERNEL::Exception(oss.str().c_str());
509 return MEDCouplingUMesh::MergeUMeshes(ms2);
513 * \param [in] type the geometric type for which the dimension is asked.
514 * \return the dimension associated to the input geometric type \a type.
516 * \throw if type is equal to \c INTERP_KERNEL::NORM_ERROR or to an unexisting geometric type.
518 int MEDCouplingMesh::GetDimensionOfGeometricType(INTERP_KERNEL::NormalizedCellType type) throw(INTERP_KERNEL::Exception)
520 const INTERP_KERNEL::CellModel& cm=INTERP_KERNEL::CellModel::GetCellModel(type);
521 return (int) cm.getDimension();
525 * \param [in] type the geometric type for which the representation is asked.
526 * \return the string representation corresponding to the input geometric type \a type.
528 * \throw if type is equal to \c INTERP_KERNEL::NORM_ERROR or to an unexisting geometric type.
530 const char *MEDCouplingMesh::GetReprOfGeometricType(INTERP_KERNEL::NormalizedCellType type) throw(INTERP_KERNEL::Exception)
532 const INTERP_KERNEL::CellModel& cm=INTERP_KERNEL::CellModel::GetCellModel(type);
537 * Finds cells in contact with a ball (i.e. a point with precision).
538 * \warning This method is suitable if the caller intends to evaluate only one
539 * point, for more points getCellsContainingPoints() is recommended as it is
541 * \param [in] pos - array of coordinates of the ball central point.
542 * \param [in] eps - ball radius.
543 * \param [in,out] elts - vector returning ids of the found cells. It is cleared
544 * before inserting ids.
546 * \ref cpp_mcumesh_getCellsContainingPoint "Here is a C++ example".<br>
547 * \ref py_mcumesh_getCellsContainingPoint "Here is a Python example".
549 void MEDCouplingMesh::getCellsContainingPoint(const double *pos, double eps, std::vector<int>& elts) const
551 int ret=getCellContainingPoint(pos,eps);
556 * Finds cells in contact with several balls (i.e. points with precision).
557 * This method is an extension of getCellContainingPoint() and
558 * getCellsContainingPoint() for the case of multiple points.
559 * \param [in] pos - an array of coordinates of points in full interlace mode :
560 * X0,Y0,Z0,X1,Y1,Z1,... Size of the array must be \a
561 * this->getSpaceDimension() * \a nbOfPoints
562 * \param [in] nbOfPoints - number of points to locate within \a this mesh.
563 * \param [in] eps - radius of balls (i.e. the precision).
564 * \param [in,out] elts - vector returning ids of found cells.
565 * \param [in,out] eltsIndex - an array, of length \a nbOfPoints + 1,
566 * dividing cell ids in \a elts into groups each referring to one
567 * point. Its every element (except the last one) is an index pointing to the
568 * first id of a group of cells. For example cells in contact with the *i*-th
569 * point are described by following range of indices:
570 * [ \a eltsIndex[ *i* ], \a eltsIndex[ *i*+1 ] ) and the cell ids are
571 * \a elts[ \a eltsIndex[ *i* ]], \a elts[ \a eltsIndex[ *i* ] + 1 ], ...
572 * Number of cells in contact with the *i*-th point is
573 * \a eltsIndex[ *i*+1 ] - \a eltsIndex[ *i* ].
575 * \ref cpp_mcumesh_getCellsContainingPoints "Here is a C++ example".<br>
576 * \ref py_mcumesh_getCellsContainingPoints "Here is a Python example".
578 void MEDCouplingMesh::getCellsContainingPoints(const double *pos, int nbOfPoints, double eps, std::vector<int>& elts, std::vector<int>& eltsIndex) const
580 eltsIndex.resize(nbOfPoints+1);
583 int spaceDim=getSpaceDimension();
584 const double *work=pos;
585 for(int i=0;i<nbOfPoints;i++,work+=spaceDim)
587 int ret=getCellContainingPoint(work,eps);
591 eltsIndex[i+1]=eltsIndex[i]+1;
594 eltsIndex[i+1]=eltsIndex[i];
599 * Writes \a this mesh into a VTK format file named as specified.
600 * \param [in] fileName - the name of the file to write in.
601 * \throw If \a fileName is not a writable file.
603 void MEDCouplingMesh::writeVTK(const char *fileName) const throw(INTERP_KERNEL::Exception)
606 writeVTKAdvanced(fileName,cda,pda);
609 void MEDCouplingMesh::writeVTKAdvanced(const char *fileName, const std::string& cda, const std::string& pda) const throw(INTERP_KERNEL::Exception)
611 std::ofstream ofs(fileName);
612 ofs << "<VTKFile type=\"" << getVTKDataSetType() << "\" version=\"0.1\" byte_order=\"LittleEndian\">\n";
613 writeVTKLL(ofs,cda,pda);
614 ofs << "</VTKFile>\n";