/usr/include/dune/grid/alugrid/3d/iterator.hh is in libdune-grid-dev 2.4.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 | // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_ALU3DGRIDITERATOR_HH
#define DUNE_ALU3DGRIDITERATOR_HH
// System includes
// Dune includes
#include <dune/grid/common/grid.hh>
#include <dune/grid/alugrid/common/intersectioniteratorwrapper.hh>
#include <dune/grid/alugrid/common/memory.hh>
// Local includes
#include "alu3dinclude.hh"
#include "topology.hh"
#include "faceutility.hh"
#include "alu3diterators.hh"
namespace Dune {
// Forward declarations
template<int cd, int dim, class GridImp>
class ALU3dGridEntity;
template<int cd, PartitionIteratorType pitype, class GridImp >
class ALU3dGridLevelIterator;
template<int cd, class GridImp >
class ALU3dGridEntityPointer;
template<int mydim, int coorddim, class GridImp>
class ALU3dGridGeometry;
template<class GridImp>
class ALU3dGridHierarchicIterator;
template<class GridImp>
class ALU3dGridIntersectionIterator;
template<int codim, PartitionIteratorType pitype, class GridImp>
class ALU3dGridLeafIterator;
template< ALU3dGridElementType, class >
class ALU3dGrid;
template< ALU3dGridElementType, class >
class ALU3dGridFaceInfo;
template< ALU3dGridElementType, class >
class ALU3dGridGeometricFaceInfo;
//**********************************************************************
//
// --ALU3dGridIntersectionIterator
// --IntersectionIterator
/*!
Mesh entities of codimension 0 ("elements") allow to visit all neighbors, wh
a neighbor is an entity of codimension 0 which has a common entity of codimens
These neighbors are accessed via a IntersectionIterator. This allows the implement
non-matching meshes. The number of neigbors may be different from the number o
of an element!
*/
template<class GridImp>
class ALU3dGridIntersectionIterator
//: public IntersectionIteratorDefaultImplementation <GridImp,ALU3dGridIntersectionIterator>
{
enum { dim = GridImp::dimension };
enum { dimworld = GridImp::dimensionworld };
typedef typename GridImp::MPICommunicatorType Comm;
typedef ALU3dImplTraits< GridImp::elementType, Comm > ImplTraits;
typedef typename ImplTraits::HElementType HElementType ;
typedef typename ImplTraits::HBndSegType HBndSegType;
typedef typename ImplTraits::GEOElementType GEOElementType;
typedef typename ImplTraits::IMPLElementType IMPLElementType;
typedef typename ImplTraits::GEOFaceType GEOFaceType;
typedef typename ImplTraits::NeighbourPairType NeighbourPairType;
typedef typename ImplTraits::BNDFaceType BNDFaceType;
typedef typename ALU3dImplTraits< tetra, Comm >::GEOElementType GEOTetraElementType;
typedef typename ALU3dImplTraits< hexa, Comm >::GEOElementType GEOHexaElementType;
typedef typename ALU3dImplTraits< tetra, Comm >::BNDFaceType GEOTriangleBndType;
typedef typename ALU3dImplTraits< hexa, Comm >::BNDFaceType GEOQuadBndType;
typedef ALU3dGridFaceInfo< GridImp::elementType, Comm > FaceInfoType;
typedef typename std::unique_ptr< FaceInfoType > FaceInfoPointer;
typedef typename conditional<
tetra == GridImp::elementType,
ALU3dGridGeometricFaceInfoTetra< Comm >,
ALU3dGridGeometricFaceInfoHexa< Comm > >::type GeometryInfoType;
typedef ElementTopologyMapping<GridImp::elementType> ElementTopo;
typedef FaceTopologyMapping<GridImp::elementType> FaceTopo;
enum { numFaces = EntityCount<GridImp::elementType>::numFaces };
enum { numVerticesPerFace =
EntityCount<GridImp::elementType>::numVerticesPerFace };
enum { numVertices = EntityCount<GridImp::elementType>::numVertices };
typedef ALU3dGridIntersectionIterator<GridImp> ThisType;
friend class ALU3dGridEntity<0,dim,GridImp>;
friend class IntersectionIteratorWrapper<GridImp,ThisType>;
protected:
enum IntersectionIteratorType { IntersectionLeaf , IntersectionLevel, IntersectionBoth };
typedef typename GridImp::Traits::template Codim< 1 >::GeometryImpl GeometryImpl;
typedef typename GridImp::Traits::template Codim< 1 >::LocalGeometryImpl LocalGeometryImpl;
public:
typedef typename GridImp::GridObjectFactoryType FactoryType;
typedef typename GridImp::template Codim<0>::Entity Entity;
typedef typename GridImp::template Codim<1>::Geometry Geometry;
typedef typename GridImp::template Codim<1>::LocalGeometry LocalGeometry;
typedef ALU3dGridIntersectionIterator< GridImp > ImplementationType;
//! type of the intersection
typedef Dune::Intersection< GridImp, Dune::ALU3dGridIntersectionIterator< GridImp > > Intersection;
typedef FieldVector<alu3d_ctype, dimworld> NormalType;
typedef ALU3dGridEntityPointer<0,GridImp> EntityPointer;
typedef ALUMemoryProvider< ThisType > StorageType;
//! The default Constructor , level tells on which level we want
//! neighbours
ALU3dGridIntersectionIterator(const FactoryType& factory,
HElementType *el,
int wLevel,bool end=false);
ALU3dGridIntersectionIterator(const FactoryType& factory, int wLevel);
//! The copy constructor
ALU3dGridIntersectionIterator(const ALU3dGridIntersectionIterator<GridImp> & org);
//! assignment of iterators
void assign(const ALU3dGridIntersectionIterator<GridImp> & org);
//! The copy constructor
bool equals (const ALU3dGridIntersectionIterator<GridImp> & i) const;
//! increment iterator
void increment ();
//! access neighbor
EntityPointer outside() const;
//! access entity where iteration started
EntityPointer inside() const;
//! return true if intersection is with boundary.
bool boundary () const;
//! return true if across the face an neighbor on leaf exists
bool neighbor () const;
//! return information about the Boundary
int boundaryId () const;
//! return the boundary segment index
size_t boundarySegmentIndex() const;
//! intersection of codimension 1 of this neighbor with element where
//! iteration started.
//! Here returned element is in LOCAL coordinates of the element
//! where iteration started.
LocalGeometry geometryInInside () const;
//! intersection of codimension 1 of this neighbor with element where
//! iteration started.
//! Here returned element is in GLOBAL coordinates of the element where
//! iteration started.
Geometry geometry () const;
/** \brief obtain the type of reference element for this intersection */
GeometryType type () const;
//! local index of codim 1 entity in self where intersection is contained
//! in
int indexInInside () const;
//! intersection of codimension 1 of this neighbor with element where
//! iteration started.
//! Here returned element is in LOCAL coordinates of neighbor
LocalGeometry geometryInOutside () const;
//! local index of codim 1 entity in neighbor where intersection is
//! contained
int indexInOutside () const;
//! returns twist of face compared to inner element
int twistInInside() const;
//! returns twist of face compared to outer element
int twistInOutside() const;
//! return unit outer normal, this should be dependent on local
//! coordinates for higher order boundary
NormalType & unitOuterNormal (const FieldVector<alu3d_ctype, dim-1>& local) const ;
//! return outer normal, this should be dependent on local
//! coordinates for higher order boundary
NormalType & outerNormal (const FieldVector<alu3d_ctype, dim-1>& local) const;
//! return outer normal, this should be dependent on local
//! coordinates for higher order boundary
NormalType & integrationOuterNormal (const FieldVector<alu3d_ctype, dim-1>& local) const;
//! return level of iterator (level of item)
int level () const;
int outsideLevel () const { return connector_.outsideLevel(); }
//! return true if intersection is conforming
bool conforming () const
{
return (connector_.conformanceState() == FaceInfoType::CONFORMING);
}
//! return current face
const GEOFaceType& getItem() const { return connector_.face(); }
protected:
// set interator to end iterator
void done () ;
template< class EntityType > void done ( const EntityType &en ) { done(); }
// reset IntersectionIterator to first neighbour
void setFirstItem(const HElementType & elem, int wLevel);
// reset IntersectionIterator to first neighbour
void setInteriorItem(const HElementType & elem,
const BNDFaceType& bnd, int wLevel);
// reset IntersectionIterator to first neighbour
template <class EntityType>
void first(const EntityType & en, int wLevel);
// set new face
void setNewFace(const GEOFaceType& newFace);
private:
// set new face (only LeafIntersectionIterator)
void setGhostFace(const GEOFaceType& newFace);
protected:
// generate local geometries
void buildLocalGeometries() const;
// get the face corresponding to the index
const typename ALU3dImplTraits< tetra, Comm >::GEOFaceType *
getFace ( const GEOTriangleBndType &bnd, int index ) const;
// get the face corresponding to the index
const typename ALU3dImplTraits< hexa, Comm >::GEOFaceType *
getFace ( const GEOQuadBndType &bnd, int index ) const;
// get the face corresponding to the index
const typename ALU3dImplTraits< tetra, Comm >::GEOFaceType *
getFace ( const GEOTetraElementType &elem, int index ) const;
const typename ALU3dImplTraits< hexa, Comm >::GEOFaceType *
getFace ( const GEOHexaElementType &elem, int index ) const;
//! structure containing the topological and geometrical information about
//! the face which the iterator points to
mutable FaceInfoType connector_;
mutable GeometryInfoType geoProvider_; // need to initialise
// reference to factory
const FactoryType& factory_;
//! current element from which we started the intersection iterator
const IMPLElementType* item_;
//! current pointer to ghost face if iterator was started from ghost element
const BNDFaceType* ghost_;
mutable int innerLevel_;
mutable int index_;
mutable GeometryImpl intersectionGlobal_;
mutable GeometryImpl intersectionSelfLocal_;
mutable GeometryImpl intersectionNeighborLocal_;
// unit outer normal
mutable NormalType unitOuterNormal_;
};
template<class GridImp>
class ALU3dGridLevelIntersectionIterator :
public ALU3dGridIntersectionIterator<GridImp>
{
enum { dim = GridImp::dimension };
enum { dimworld = GridImp::dimensionworld };
typedef typename GridImp::MPICommunicatorType Comm;
typedef ALU3dImplTraits< GridImp::elementType, Comm > ImplTraits;
typedef typename ImplTraits::HElementType HElementType ;
typedef typename ImplTraits::GEOElementType GEOElementType;
typedef typename ImplTraits::IMPLElementType IMPLElementType;
typedef typename ImplTraits::GEOFaceType GEOFaceType;
typedef typename ImplTraits::NeighbourPairType NeighbourPairType;
typedef typename ImplTraits::BNDFaceType BNDFaceType;
typedef ALU3dGridFaceInfo< GridImp::elementType, Comm > FaceInfoType;
typedef typename std::unique_ptr< FaceInfoType > FaceInfoPointer;
typedef typename conditional<
tetra == GridImp::elementType,
ALU3dGridGeometricFaceInfoTetra< Comm >,
ALU3dGridGeometricFaceInfoHexa< Comm > >::type GeometryInfoType;
typedef ElementTopologyMapping<GridImp::elementType> ElementTopo;
typedef FaceTopologyMapping<GridImp::elementType> FaceTopo;
enum { numFaces = EntityCount<GridImp::elementType>::numFaces };
enum { numVerticesPerFace =
EntityCount<GridImp::elementType>::numVerticesPerFace };
enum { numVertices = EntityCount<GridImp::elementType>::numVertices };
typedef ALU3dGridIntersectionIterator<GridImp> BaseType;
typedef ALU3dGridLevelIntersectionIterator<GridImp> ThisType;
friend class ALU3dGridEntity<0,dim,GridImp>;
friend class IntersectionIteratorWrapper<GridImp,ThisType>;
protected:
using BaseType :: item_;
using BaseType :: ghost_;
using BaseType :: innerLevel_;
using BaseType :: index_;
using BaseType :: connector_;
using BaseType :: geoProvider_;
using BaseType :: factory_;
using BaseType :: boundary;
using BaseType :: done ;
using BaseType :: getFace;
using BaseType :: neighbor ;
public:
typedef typename GridImp::GridObjectFactoryType FactoryType;
typedef ALUMemoryProvider< ThisType > StorageType;
//! The default Constructor , level tells on which level we want
//! neighbours
ALU3dGridLevelIntersectionIterator(const FactoryType& factory,
HElementType *el,
int wLevel,bool end=false);
ALU3dGridLevelIntersectionIterator(const FactoryType& factory, int wLevel);
//! The copy constructor
ALU3dGridLevelIntersectionIterator(const ThisType & org);
//! assignment of iterators
void assign(const ThisType & org);
//! increment iterator
void increment ();
// reset IntersectionIterator to first neighbour
template <class EntityType>
void first(const EntityType & en, int wLevel);
//! return true if across the edge an neighbor on this level exists
bool neighbor () const;
//! return true if intersection is conforming
bool conforming () const
{
assert( ( ! connector_.conformingRefinement() ) ?
( !neighbor() || this->connector_.conformanceState() == FaceInfoType::CONFORMING ) : true );
// for conforming refinement use base implementation
// otherwise its true
return connector_.conformingRefinement() ?
BaseType :: conforming() : true ;
}
private:
// set new face
void setNewFace(const GEOFaceType& newFace);
// reset IntersectionIterator to first neighbour
void setFirstItem(const HElementType & elem, int wLevel);
// reset IntersectionIterator to first neighbour
void setInteriorItem(const HElementType & elem,
const BNDFaceType& bnd, int wLevel);
bool levelNeighbor_;
bool isLeafItem_;
};
//////////////////////////////////////////////////////////////////////////////
//
// --IterationImpl
//
//////////////////////////////////////////////////////////////////////////////
template <class InternalIteratorType >
class ALU3dGridTreeIterator
{
public:
typedef typename InternalIteratorType :: val_t val_t;
// here the items level will do
template <class GridImp, int codim>
class GetLevel
{
public:
template <class ItemType>
static int getLevel(const GridImp & grid, const ItemType & item, int level )
{
assert( & item );
return (level < 0) ? item.level() : level;
}
};
// level is not needed for codim = 0
template <class GridImp>
class GetLevel<GridImp,0>
{
public:
template <class ItemType>
static int getLevel(const GridImp & grid, const ItemType & item, int level )
{
return level;
}
};
template <class GridImp>
class GetLevel<GridImp,3>
{
public:
template <class ItemType>
static int getLevel(const GridImp & grid, const ItemType & item, int level)
{
return (level < 0) ? grid.getLevelOfLeafVertex(item) : level;
}
};
protected:
// set iterator to first item
template <class GridImp, class IteratorImp>
void firstItem(const GridImp & grid, IteratorImp & it, int level )
{
InternalIteratorType & iter = it.internalIterator();
iter.first();
if( ! iter.done() )
{
assert( iter.size() > 0 );
setItem(grid,it,iter,level);
}
else
{
it.removeIter();
}
}
// set the iterators entity to actual item
template <class GridImp, class IteratorImp>
void setItem (const GridImp & grid, IteratorImp & it, InternalIteratorType & iter, int level)
{
enum { codim = IteratorImp :: codimension };
val_t & item = iter.item();
assert( item.first || item.second );
if( item.first )
{
it.updateEntityPointer( item.first ,
GetLevel<GridImp,codim>::getLevel(grid, *(item.first) , level) );
}
else
it.updateGhostPointer( *item.second );
}
// increment iterator
template <class GridImp, class IteratorImp>
void incrementIterator(const GridImp & grid, IteratorImp & it, int level)
{
// if iter_ is zero, then end iterator
InternalIteratorType & iter = it.internalIterator();
iter.next();
if(iter.done())
{
it.removeIter();
return ;
}
setItem(grid,it,iter,level);
return ;
}
};
//**********************************************************************
//
// --ALU3dGridLevelIterator
// --LevelIterator
/*!
Enables iteration over all entities of a given codimension and level of a grid.
*/
template<int cd, PartitionIteratorType pitype, class GridImp>
class ALU3dGridLevelIterator
: public ALU3dGridEntityPointer< cd, GridImp >,
public ALU3dGridTreeIterator< ALU3DSPACE ALU3dGridLevelIteratorWrapper< cd, pitype, typename GridImp::MPICommunicatorType > >
{
enum { dim = GridImp::dimension };
enum { dimworld = GridImp::dimensionworld };
typedef typename GridImp::MPICommunicatorType Comm;
friend class ALU3dGridEntity<3,dim,GridImp>;
friend class ALU3dGridEntity<2,dim,GridImp>;
friend class ALU3dGridEntity<1,dim,GridImp>;
friend class ALU3dGridEntity<0,dim,GridImp>;
friend class ALU3dGrid< GridImp::elementType, Comm >;
friend class ALU3dGridTreeIterator< ALU3DSPACE ALU3dGridLevelIteratorWrapper< cd, pitype, Comm > >;
public:
typedef typename GridImp::GridObjectFactoryType FactoryType;
typedef typename GridImp::template Codim<cd>::Entity Entity;
typedef ALU3dGridVertexList< Comm > VertexListType;
//! typedef of my type
typedef ALU3dGridLevelIterator<cd,pitype,GridImp> ThisType;
// the wrapper for the original iterator of the ALU3dGrid
typedef typename ALU3DSPACE ALU3dGridLevelIteratorWrapper< cd, pitype, Comm > IteratorType;
typedef IteratorType InternalIteratorType;
typedef typename ALU3DSPACE IteratorElType< cd, Comm >::val_t val_t;
//! Constructor for begin iterator
ALU3dGridLevelIterator(const FactoryType& factory, int level, bool);
//! Constructor for end iterator
ALU3dGridLevelIterator(const FactoryType& factory, int level);
//! Constructor
ALU3dGridLevelIterator(const ThisType & org);
// destructor
~ALU3dGridLevelIterator();
//! prefix increment
void increment ();
//! dereference Entity, faster then the entity pointersmethod
Entity & dereference () const;
//! release entity
void releaseEntity () {}
//! assignment of iterators
ThisType & operator = (const ThisType & org);
private:
//! do assignment
void assign (const ThisType & org);
// actual level
int level_;
// the internal iterator
IteratorType * iter_ ;
// deletes iter_
void removeIter ();
IteratorType & internalIterator ()
{
assert( iter_ );
return *iter_;
}
};
//********************************************************************
//
// --ALU3dGridLeafIterator
// --LeafIterator
//
//********************************************************************
//! Leaf iterator
template<int cdim, PartitionIteratorType pitype, class GridImp>
class ALU3dGridLeafIterator
: public ALU3dGridEntityPointer< cdim, GridImp >,
public ALU3dGridTreeIterator< ALU3DSPACE ALU3dGridLeafIteratorWrapper< cdim, pitype, typename GridImp::MPICommunicatorType > >
{
enum { dim = GridImp :: dimension };
friend class ALU3dGridEntity<cdim,dim,GridImp>;
enum { codim = cdim };
typedef typename GridImp::MPICommunicatorType Comm;
public:
typedef typename GridImp::GridObjectFactoryType FactoryType;
typedef typename GridImp::template Codim<cdim>::Entity Entity;
typedef typename ALU3DSPACE ALU3dGridLeafIteratorWrapper< cdim, pitype, Comm > IteratorType ;
friend class ALU3dGridTreeIterator< IteratorType > ;
typedef IteratorType InternalIteratorType;
typedef typename ALU3DSPACE IteratorElType< cdim, Comm >::val_t val_t;
typedef ALU3dGridLeafIterator<cdim, pitype, GridImp> ThisType;
//! Constructor for end iterators
ALU3dGridLeafIterator(const FactoryType& factory, int level);
//! Constructor for begin Iterators
ALU3dGridLeafIterator(const FactoryType& factory, int level , bool isBegin);
//! copy Constructor
ALU3dGridLeafIterator(const ThisType & org);
//! destructor deleting real iterator
~ALU3dGridLeafIterator();
//! prefix increment
void increment ();
//! dereference Entity, faster then the entity pointersmethod
Entity & dereference () const;
//! release entity
void releaseEntity () {}
//! assignment of iterators
ThisType & operator = (const ThisType & org);
private:
// the internal iterator
IteratorType * iter_;
// max level for iteration
int walkLevel_ ;
//! do assignment
void assign (const ThisType & org);
// deletes iter_
void removeIter () ;
// return reference to iter_
InternalIteratorType & internalIterator ()
{
assert( iter_ );
return *iter_;
}
};
// - HierarchicIteraor
// --HierarchicIterator
template<class GridImp>
class ALU3dGridHierarchicIterator
: public ALU3dGridEntityPointer<0,GridImp>
// public HierarchicIteratorDefaultImplementation <GridImp,ALU3dGridHierarchicIterator>
{
typedef ALU3dGridHierarchicIterator<GridImp> ThisType;
enum { dim = GridImp::dimension };
typedef typename GridImp::MPICommunicatorType Comm;
typedef ALU3dImplTraits< GridImp::elementType, Comm > ImplTraits;
typedef typename ImplTraits::HElementType HElementType;
typedef typename ImplTraits::HBndSegType HBndSegType;
template < class PointerType, class CommT >
class GhostElementStorage;
//! empty implementation for
template < class PointerType >
class GhostElementStorage< PointerType, No_Comm >
{
public:
GhostElementStorage() {}
explicit GhostElementStorage( const PointerType& ) {}
PointerType& operator * () { PointerType* p = 0; assert( false ); abort(); return *p; }
const PointerType* ghost () const { return 0; }
PointerType* nextGhost () const { return 0; }
PointerType* operator -> () const { return 0; }
bool operator != (const PointerType* ) const { return false; }
bool operator ! () const { return true ; }
GhostElementStorage& operator= (const GhostElementStorage& ) { return *this; }
GhostElementStorage& operator= (const PointerType* ) { return *this; }
bool valid () const { return false; }
};
#if ALU3DGRID_PARALLEL
//! implementation holding two ghost pointer
template < class PointerType >
class GhostElementStorage< PointerType, MPI_Comm >
{
private:
// pointers to ghost and current ghost
const HBndSegType * ghost_;
HBndSegType * nextGhost_;
public:
GhostElementStorage() : ghost_( 0 ), nextGhost_( 0 ) {}
explicit GhostElementStorage( const PointerType& gh ) : ghost_( &gh ), nextGhost_( 0 ) {}
GhostElementStorage( const GhostElementStorage& org )
: ghost_( org.ghost_ ), nextGhost_( org.nextGhost_ ) {}
PointerType& operator * () { assert( nextGhost_ ); return *nextGhost_; }
const PointerType* ghost () const { return ghost_; }
PointerType* nextGhost () const { return nextGhost_; }
PointerType* operator -> () { return nextGhost_; }
bool operator != (const PointerType* p ) const { return (nextGhost_ != p); }
bool operator ! () const { return nextGhost_ == 0; }
GhostElementStorage& operator= (const GhostElementStorage& org)
{
ghost_ = org.ghost_;
nextGhost_ = org.nextGhost_;
return *this;
}
GhostElementStorage& operator= (PointerType* p)
{
nextGhost_ = p;
return *this;
}
bool valid () const { return (ghost_ != 0); }
};
#endif
public:
typedef typename GridImp::GridObjectFactoryType FactoryType;
typedef typename GridImp::template Codim<0>::Entity Entity;
typedef typename GridImp::ctype ctype;
//! the normal Constructor
ALU3dGridHierarchicIterator(const FactoryType& factory,
const HElementType & elem,
int maxlevel, bool end );
//! start constructor for ghosts
ALU3dGridHierarchicIterator(const FactoryType& factory,
const HBndSegType& ghost,
int maxlevel,
bool end);
//! the normal Constructor
ALU3dGridHierarchicIterator(const ThisType &org);
//! increment
void increment();
//! dereference Entity, faster then the entity pointersmethod
Entity & dereference () const;
//! release entity
void releaseEntity () {}
//! the assignment operator
ThisType & operator = (const ThisType & org);
private:
// assign iterator
void assign(const ThisType & org);
//! return level of item
int getLevel(const HElementType* item) const;
//! return correct level for ghosts
int getLevel(const HBndSegType* face) const;
// go to next valid element
template <class HItemType>
HItemType* goNextElement (const HItemType* startElem, HItemType * oldEl);
//! element from where we started
const HElementType * elem_;
// pointers to ghost and current ghost
GhostElementStorage< HBndSegType, Comm > ghostElem_;
//! maximal level to go down
int maxlevel_;
};
} // end namespace Dune
#include "iterator_imp.cc"
#endif
|