Dune Core Modules (2.4.1)

dgfalu.hh
1// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2// vi: set et ts=4 sw=2 sts=2:
3#ifndef DUNE_DGFPARSERALU_HH
4#define DUNE_DGFPARSERALU_HH
5
6// only include if ALUGrid is used
7#if HAVE_ALUGRID
8
10#include <dune/grid/io/file/dgfparser/dgfparser.hh>
11#include <dune/grid/io/file/dgfparser/parser.hh>
12#include <dune/grid/io/file/dgfparser/blocks/projection.hh>
13
14#include <dune/grid/common/intersection.hh>
15
16namespace Dune
17{
18
19 // External Forward Declarations
20 // -----------------------------
21
22 template< class GridImp, class IntersectionImp >
23 class Intersection;
24
25
26
27 // DGFGridInfo (specialization for ALUGrid)
28 // ----------------------------------------
29
31 template<int dimg, int dimw, ALUGridElementType eltype, ALUGridRefinementType refinementtype, class Comm >
32 struct DGFGridInfo< Dune::ALUGrid< dimg, dimw, eltype, refinementtype, Comm > >
33 {
34 static int refineStepsForHalf () { return ( refinementtype == conforming ) ? dimg : 1; }
35 static double refineWeight () { return ( refinementtype == conforming ) ? 0.5 : 1.0/(std::pow( 2.0, double(dimg))); }
36 };
39 // DGFGridFactory for AluGrid
40 // --------------------------
41
42 // template< int dim, int dimworld > // for a first version
43 template < class G >
44 struct DGFBaseFactory
45 {
46 typedef G Grid;
47 const static int dimension = Grid::dimension;
48 typedef MPIHelper::MPICommunicator MPICommunicatorType;
49 typedef typename Grid::template Codim<0>::Entity Element;
50 typedef typename Grid::template Codim<dimension>::Entity Vertex;
51 typedef Dune::GridFactory<Grid> GridFactory;
52
53 DGFBaseFactory ()
54 : factory_( ),
55 dgf_( 0, 1 )
56 {}
57
58 explicit DGFBaseFactory ( MPICommunicatorType comm )
59 : factory_(),
60 dgf_( rank(comm), size(comm) )
61 {}
62
63 Grid *grid () const
64 {
65 return grid_;
66 }
67
68 template< class Intersection >
69 bool wasInserted ( const Intersection &intersection ) const
70 {
71 return factory_.wasInserted( intersection );
72 }
73
74 template< class GG, class II >
75 int boundaryId ( const Intersection< GG, II > & intersection ) const
76 {
77 typedef Dune::Intersection< GG, II > Intersection;
78 typename Intersection::EntityPointer inside = intersection.inside();
79 const typename Intersection::Entity & entity = *inside;
80 const int face = intersection.indexInInside();
81
82 const ReferenceElement< double, dimension > & refElem =
84 int corners = refElem.size( face, 1, dimension );
85 std :: vector< unsigned int > bound( corners );
86 for( int i=0; i < corners; ++i )
87 {
88 const int k = refElem.subEntity( face, 1, i, dimension );
89 bound[ i ] = factory_.insertionIndex( *entity.template subEntity< dimension >( k ) );
90 }
91
92 DuneGridFormatParser::facemap_t::key_type key( bound, false );
93 const DuneGridFormatParser::facemap_t::const_iterator pos = dgf_.facemap.find( key );
94 if( pos != dgf_.facemap.end() )
95 return dgf_.facemap.find( key )->second.first;
96 else
97 return (intersection.boundary() ? 1 : 0);
98 }
99
100 template< class GG, class II >
101 const typename DGFBoundaryParameter::type &
102 boundaryParameter ( const Intersection< GG, II > & intersection ) const
103 {
104 typedef Dune::Intersection< GG, II > Intersection;
105 typename Intersection::EntityPointer inside = intersection.inside();
106 const typename Intersection::Entity & entity = *inside;
107 const int face = intersection.indexInInside();
108
109 const ReferenceElement< double, dimension > & refElem =
111 int corners = refElem.size( face, 1, dimension );
112 std :: vector< unsigned int > bound( corners );
113 for( int i=0; i < corners; ++i )
114 {
115 const int k = refElem.subEntity( face, 1, i, dimension );
116 bound[ i ] = factory_.insertionIndex( *entity.template subEntity< dimension >( k ) );
117 }
118
119 DuneGridFormatParser::facemap_t::key_type key( bound, false );
120 const DuneGridFormatParser::facemap_t::const_iterator pos = dgf_.facemap.find( key );
121 if( pos != dgf_.facemap.end() )
122 return dgf_.facemap.find( key )->second.second;
123 else
125 }
126
127 template< int codim >
128 int numParameters () const
129 {
130 if( codim == 0 )
131 return dgf_.nofelparams;
132 else if( codim == dimension )
133 return dgf_.nofvtxparams;
134 else
135 return 0;
136 }
137
138 // return true if boundary parameters found
139 bool haveBoundaryParameters () const
140 {
141 return dgf_.haveBndParameters;
142 }
143
144 std::vector< double > &parameter ( const Element &element )
145 {
146 if( numParameters< 0 >() <= 0 )
147 {
148 DUNE_THROW( InvalidStateException,
149 "Calling DGFGridFactory::parameter is only allowed if there are parameters." );
150 }
151 return dgf_.elParams[ factory_.insertionIndex( element ) ];
152 }
153
154 std::vector< double > &parameter ( const Vertex &vertex )
155 {
156 if( numParameters< dimension >() <= 0 )
157 {
158 DUNE_THROW( InvalidStateException,
159 "Calling DGFGridFactory::parameter is only allowed if there are parameters." );
160 }
161 return dgf_.vtxParams[ factory_.insertionIndex( vertex ) ];
162 }
163
164 protected:
165 bool generateALUGrid( const ALUGridElementType eltype,
166 std::istream &file,
167 MPICommunicatorType communicator,
168 const std::string &filename );
169
170 bool generateALU2dGrid( const ALUGridElementType eltype,
171 std::istream &file,
172 MPICommunicatorType communicator,
173 const std::string &filename );
174
175 static Grid* callDirectly( const char* gridname,
176 const int rank,
177 const char *filename,
178 MPICommunicatorType communicator )
179 {
180 #if ALU3DGRID_PARALLEL
181 // in parallel runs add rank to filename
182 std :: stringstream tmps;
183 tmps << filename << "." << rank;
184 const std :: string &tmp = tmps.str();
185
186 // if file exits then use it
187 if( fileExists( tmp.c_str() ) )
188 return new Grid( tmp.c_str(), communicator );
189 #endif
190 // for rank 0 we also check the normal file name
191 if( rank == 0 )
192 {
193 if( fileExists( filename ) )
194 return new Grid( filename , communicator );
195
196 // only throw this exception on rank 0 because
197 // for the other ranks we can still create empty grids
198 DUNE_THROW( GridError, "Unable to create " << gridname << " from '"
199 << filename << "'." );
200 }
201 else
202 dwarn << "WARNING: P[" << rank << "]: Creating empty grid!" << std::endl;
203
204 // return empty grid on all other processes
205 return new Grid( communicator );
206 }
207 static bool fileExists ( const char *fileName )
208 {
209 std :: ifstream testfile( fileName );
210 if( !testfile )
211 return false;
212 testfile.close();
213 return true;
214 }
215 static int rank( MPICommunicatorType MPICOMM )
216 {
217 int rank = 0;
218#if HAVE_MPI
219 MPI_Comm_rank( MPICOMM, &rank );
220#endif
221 return rank;
222 }
223 static int size( MPICommunicatorType MPICOMM )
224 {
225 int size = 1;
226#if HAVE_MPI
227 MPI_Comm_size( MPICOMM, &size );
228#endif
229 return size;
230 }
231 Grid *grid_;
232 GridFactory factory_;
233 DuneGridFormatParser dgf_;
234 };
235
236 template < ALUGridElementType eltype, ALUGridRefinementType refinementtype, class Comm >
237 struct DGFGridFactory< ALUGrid<3,3, eltype, refinementtype, Comm > > :
238 public DGFBaseFactory< ALUGrid<3,3, eltype, refinementtype, Comm > >
239 {
240 typedef ALUGrid<3,3, eltype, refinementtype, Comm > DGFGridType;
241 typedef DGFBaseFactory< DGFGridType > BaseType;
242 typedef typename BaseType :: MPICommunicatorType MPICommunicatorType;
243 protected:
244 using BaseType :: grid_;
245 using BaseType :: callDirectly;
246 public:
247 explicit DGFGridFactory ( std::istream &input,
248 MPICommunicatorType comm = MPIHelper::getCommunicator() )
249 : BaseType( comm )
250 {
251 input.clear();
252 input.seekg( 0 );
253 if( !input )
254 DUNE_THROW( DGFException, "Error resetting input stream." );
255 generate( input, comm );
256 }
257
258 explicit DGFGridFactory ( const std::string &filename,
259 MPICommunicatorType comm = MPIHelper::getCommunicator())
260 : BaseType( comm )
261 {
262 std::ifstream input( filename.c_str() );
263 bool fileFound = input.is_open() ;
264 if( fileFound )
265 fileFound = generate( input, comm, filename );
266
267 if( ! fileFound )
268 grid_ = callDirectly( "ALUGrid< 3, 3, eltype, ref, comm >", this->rank( comm ), filename.c_str(), comm );
269 }
270
271 protected:
272 bool generate( std::istream &file, MPICommunicatorType comm, const std::string &filename = "" );
273 };
274
275 template < int dimw, ALUGridElementType eltype, ALUGridRefinementType refinementtype, class Comm >
276 struct DGFGridFactory< ALUGrid<2, dimw, eltype, refinementtype, Comm > > :
277 public DGFBaseFactory< ALUGrid< 2, dimw, eltype, refinementtype, Comm > >
278 {
279 typedef ALUGrid< 2, dimw, eltype, refinementtype, Comm > DGFGridType;
280 typedef DGFBaseFactory< DGFGridType > BaseType;
281 typedef typename BaseType :: MPICommunicatorType MPICommunicatorType;
282 typedef typename BaseType::Grid Grid;
283 const static int dimension = Grid::dimension;
284 typedef typename BaseType::GridFactory GridFactory;
285
286 explicit DGFGridFactory ( std::istream &input,
287 MPICommunicatorType comm = MPIHelper::getCommunicator() )
288 : BaseType( comm )
289 {
290 input.clear();
291 input.seekg( 0 );
292 if( !input )
293 DUNE_THROW(DGFException, "Error resetting input stream." );
294 generate( input, comm );
295 }
296
297 explicit DGFGridFactory ( const std::string &filename,
298 MPICommunicatorType comm = MPIHelper::getCommunicator())
299 : BaseType( comm )
300 {
301 std::ifstream input( filename.c_str() );
302 if( !input )
303 DUNE_THROW( DGFException, "Macrofile '" << filename << "' not found." );
304 if( !generate( input, comm, filename ) )
305 {
306 if( BaseType::fileExists( filename.c_str() ) )
307 grid_ = new Grid( filename );
308 else
309 DUNE_THROW( GridError, "Unable to create a 2d ALUGrid from '" << filename << "'." );
310 }
311 }
312
313 protected:
314 bool generate( std::istream &file, MPICommunicatorType comm, const std::string &filename = "" );
315 using BaseType::grid_;
316 using BaseType::factory_;
317 using BaseType::dgf_;
318 };
319
320}
321
322#include "dgfalu.cc"
323
324#endif // #if HAVE_ALUGRID
325
326#endif // #ifndef DUNE_DGFPARSERALU_HH
Provides base classes for ALUGrid.
@ dimension
The dimension of the grid.
Definition: grid.hh:402
Intersection of a mesh entities of codimension 0 ("elements") with a "neighboring" element or with th...
Definition: intersection.hh:161
GridImp::template Codim< 0 >::EntityPointer EntityPointer
Pointer to the type of entities that this Intersection belongs to.
Definition: intersection.hh:188
GridImp::template Codim< 0 >::Entity Entity
Type of entity that this Intersection belongs to.
Definition: intersection.hh:185
MPI_Comm MPICommunicator
The type of the mpi communicator.
Definition: mpihelper.hh:173
static MPICommunicator getCommunicator()
get the default communicator
Definition: mpihelper.hh:181
#define DUNE_THROW(E, m)
Definition: exceptions.hh:243
DWarnType dwarn(std::cerr)
Stream for warnings indicating problems.
Definition: stdstreams.hh:159
Dune namespace.
Definition: alignment.hh:10
ALUGridElementType
basic element types for ALUGrid
Definition: declaration.hh:18
static const type & defaultValue()
default constructor
Definition: parser.hh:26
std::string type
type of additional boundary parameters
Definition: parser.hh:23
static double refineWeight()
static int refineStepsForHalf()
number of globalRefine steps needed to refuce h by 0.5
static const ReferenceElement< ctype, dim > & general(const GeometryType &type)
get general reference elements
Definition: referenceelements.hh:484
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