Dune Core Modules (2.4.1)

boundaryprojection.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_BOUNDARYPROJECTION_HH
4#define DUNE_BOUNDARYPROJECTION_HH
5
6//- system includes
7#include <cmath>
8
9//- Dune includes
12
13#include <dune/geometry/multilineargeometry.hh>
14
16
17namespace Dune
18{
19
22 template <int dimworld>
24 {
29
31 virtual CoordinateType operator() (const CoordinateType& global) const = 0;
32 };
33
34 template < int dimworld >
35 class BoundaryProjectionWrapper
36 : public DuneBoundaryProjection< dimworld >
37 {
38 protected:
40 const BaseType& proj_;
41 public:
43 typedef typename BaseType :: CoordinateType CoordinateType;
44
45 // constructor taking other projection
46 BoundaryProjectionWrapper( const BaseType& proje )
47 : proj_( proje )
48 {}
49
51 ~BoundaryProjectionWrapper () {}
52
54 CoordinateType operator() (const CoordinateType& global) const
55 {
56 return proj_( global );
57 }
58 };
59
60 // BoundarySegmentWrapper
61 // ----------------------
62
64 template< int dim, int dimworld >
66 : public DuneBoundaryProjection< dimworld >
67 {
69
70 typedef MultiLinearGeometry<typename Base::CoordinateType::value_type,dim-1,dimworld> FaceMapping;
71
72 public:
73 typedef typename Base::CoordinateType CoordinateType;
75
85 const std::vector< CoordinateType > &vertices,
86 const shared_ptr< BoundarySegment > &boundarySegment )
87 : faceMapping_( FaceMapping( type, vertices ) ),
88 boundarySegment_( boundarySegment )
89 {}
90
92 {
93 return boundarySegment() ( faceMapping_.local( global ) );
94 }
95
96 const BoundarySegment &boundarySegment () const
97 {
98 return *boundarySegment_;
99 }
100
101 private:
102 FaceMapping faceMapping_;
103 const shared_ptr< BoundarySegment > boundarySegment_;
104 };
105
106
107
109 //
110 // Example of boundary projection projection to a circle
111 //
113 template <int dimworld>
114 struct CircleBoundaryProjection : public DuneBoundaryProjection< dimworld >
115 {
117 typedef FieldVector< double, dimworld> CoordinateType;
118
120 CircleBoundaryProjection(const double radius = std::sqrt( (double)dimworld ))
121 : radius_( radius ) {}
122
124 virtual ~CircleBoundaryProjection() {}
125
127 virtual CoordinateType operator() (const CoordinateType& global) const
128 {
129 CoordinateType prj( global );
130 // get adjustment factor
131 const double factor = radius_ / global.two_norm();
132 // adjust
133 prj *= factor;
134 return prj;
135 }
136
137 protected:
139 const double radius_;
140 };
141
142} // end namespace
143
144#endif // #ifndef DUNE_BOUNDARYPROJECTION_HH
Base class for grid boundary segments of arbitrary geometry.
Definition: boundaryprojection.hh:67
CoordinateType operator()(const CoordinateType &global) const
projection operator projection a global coordinate
Definition: boundaryprojection.hh:91
BoundarySegmentWrapper(const GeometryType &type, const std::vector< CoordinateType > &vertices, const shared_ptr< BoundarySegment > &boundarySegment)
Definition: boundaryprojection.hh:84
Unique label for each type of entities that can occur in DUNE grids.
Definition: type.hh:25
generic geometry implementation based on corner coordinates
Definition: multilineargeometry.hh:148
Implements a vector constructed from a given type representing a field and a compile-time given size.
Dune namespace.
Definition: alignment.hh:10
This file implements the class shared_ptr (a reference counting pointer), for those systems that don'...
Base class for classes implementing geometries of boundary segments.
Definition: boundarysegment.hh:30
Interface class for vertex projection at the boundary.
Definition: boundaryprojection.hh:24
virtual CoordinateType operator()(const CoordinateType &global) const =0
projection operator projection a global coordinate
virtual ~DuneBoundaryProjection()
destructor
Definition: boundaryprojection.hh:28
FieldVector< double, dimworld > CoordinateType
type of coordinate vector
Definition: boundaryprojection.hh:26
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