dune-grid  2.3.1
albertagrid/dgfparser.hh
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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_ALBERTA_DGFPARSER_HH
4 #define DUNE_ALBERTA_DGFPARSER_HH
5 
6 #include <vector>
7 
10 
13 
16 
17 #if HAVE_ALBERTA
18 
19 namespace Dune
20 {
21 
22  // External Forward Declarations
23  // -----------------------------
24 
25  template< class GridImp, class IntersectionImp >
26  class Intersection;
27 
28 
29 
30  // DGFGridFactory for AlbertaGrid
31  // ------------------------------
32 
33  template< int dim, int dimworld >
34  struct DGFGridFactory< AlbertaGrid< dim, dimworld > >
35  {
37  const static int dimension = Grid::dimension;
38  typedef MPIHelper::MPICommunicator MPICommunicatorType;
39  typedef typename Grid::template Codim<0>::Entity Element;
40  typedef typename Grid::template Codim<dimension>::Entity Vertex;
42 
43  explicit DGFGridFactory ( std::istream &input,
44  MPICommunicatorType comm = MPIHelper::getCommunicator() );
45  explicit DGFGridFactory ( const std::string &filename,
46  MPICommunicatorType comm = MPIHelper::getCommunicator() );
47 
48  Grid *grid () const
49  {
50  return grid_;
51  }
52 
53  template< class Intersection >
54  bool wasInserted ( const Intersection &intersection ) const
55  {
56  return factory_.wasInserted( intersection );
57  }
58 
59  template< class Intersection >
60  int boundaryId ( const Intersection &intersection ) const
61  {
62  return Grid::getRealImplementation( intersection ).boundaryId();
63  }
64 
65  // return true if boundary paramters found
66  bool haveBoundaryParameters () const
67  {
68  return dgf_.haveBndParameters;
69  }
70 
71  template < class GG, class II >
73  boundaryParameter ( const Intersection< GG, II > & intersection ) const
74  {
76  typename Intersection::EntityPointer inside = intersection.inside();
77  const typename Intersection::Entity & entity = *inside;
78  const int face = intersection.indexInInside();
79 
80  const ReferenceElement< double, dimension > & refElem =
81  ReferenceElements< double, dimension >::general( entity.type() );
82  int corners = refElem.size( face, 1, dimension );
83  std :: vector< unsigned int > bound( corners );
84  for( int i=0; i < corners; ++i )
85  {
86  const int k = refElem.subEntity( face, 1, i, dimension );
87  bound[ i ] = factory_.insertionIndex( *entity.template subEntity< dimension >( k ) );
88  }
89 
90  DuneGridFormatParser::facemap_t::key_type key( bound, false );
91  const DuneGridFormatParser::facemap_t::const_iterator pos = dgf_.facemap.find( key );
92  if( pos != dgf_.facemap.end() )
93  return dgf_.facemap.find( key )->second.second;
94  else
96  }
97 
98  template< int codim >
99  int numParameters () const
100  {
101  if( codim == 0 )
102  return dgf_.nofelparams;
103  else if( codim == dimension )
104  return dgf_.nofvtxparams;
105  else
106  return 0;
107  }
108 
109  std::vector< double > &parameter ( const Element &element )
110  {
111  if( numParameters< 0 >() <= 0 )
112  {
113  DUNE_THROW( InvalidStateException,
114  "Calling DGFGridFactory::parameter is only allowed if there are parameters." );
115  }
116  return dgf_.elParams[ factory_.insertionIndex( element ) ];
117  }
118 
119  std::vector< double > &parameter ( const Vertex &vertex )
120  {
121  if( numParameters< dimension >() <= 0 )
122  {
123  DUNE_THROW( InvalidStateException,
124  "Calling DGFGridFactory::parameter is only allowed if there are parameters." );
125  }
126  return dgf_.vtxParams[ factory_.insertionIndex( vertex ) ];
127  }
128 
129  private:
130  bool generate( std::istream &input );
131 
132  Grid *grid_;
133  GridFactory factory_;
135  };
136 
137 
138 
139  // DGFGridInfo for AlbertaGrid
140  // ---------------------------
141 
142  template< int dim, int dimworld >
143  struct DGFGridInfo< AlbertaGrid< dim, dimworld > >
144  {
145  static int refineStepsForHalf ()
146  {
147  return dim;
148  }
149 
150  static double refineWeight ()
151  {
152  return 0.5;
153  }
154  };
155 
156 
157 
158  // Implementation of DGFGridFactory for AlbertaGrid
159  // ------------------------------------------------
160 
161  template< int dim, int dimworld >
162  inline DGFGridFactory< AlbertaGrid< dim, dimworld > >
163  ::DGFGridFactory ( std::istream &input, MPICommunicatorType comm )
164  : dgf_( 0, 1 )
165  {
166  input.clear();
167  input.seekg( 0 );
168  if( !input )
169  DUNE_THROW(DGFException, "Error resetting input stream." );
170  generate( input );
171  }
172 
173 
174  template< int dim, int dimworld >
176  ::DGFGridFactory ( const std::string &filename, MPICommunicatorType comm )
177  : dgf_( 0, 1 )
178  {
179  std::ifstream input( filename.c_str() );
180  if( !input )
181  DUNE_THROW( DGFException, "Macrofile " << filename << " not found." );
182  if( !generate( input ) )
183  grid_ = new AlbertaGrid< dim, dimworld >( filename.c_str() );
184  input.close();
185  }
186 
187 }
188 
189 #endif // #if HAVE_ALBERTA
190 
191 #endif // #ifndef DUNE_ALBERTA_DGFPARSER_HH