Triangle.h 4.85 KB
Newer Older
1
2
3
4
5
6
// ============================================================================
// ==                                                                        ==
// == AMDiS - Adaptive multidimensional simulations                          ==
// ==                                                                        ==
// ============================================================================
// ==                                                                        ==
7
// ==  TU Dresden                                                            ==
8
// ==                                                                        ==
9
10
11
// ==  Institut fr Wissenschaftliches Rechnen                               ==
// ==  Zellescher Weg 12-14                                                  ==
// ==  01069 Dresden                                                         ==
12
13
14
15
// ==  germany                                                               ==
// ==                                                                        ==
// ============================================================================
// ==                                                                        ==
16
// ==  https://gforge.zih.tu-dresden.de/projects/amdis/                      ==
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
// ==                                                                        ==
// ============================================================================

/** \file Triangle.h */

#ifndef AMDIS_TRIANGLE_H
#define AMDIS_TRIANGLE_H

#include "Element.h"

namespace AMDiS {

  /** \ingroup Triangulation 
   * \brief
   * A Triangle is a 2-dimensional Element.
   *
   * A Triangle and its refinements:
   *
   * <img src = "triangle.png">
   */
  class Triangle : public Element
  {
  public:
40
    /// calls base class contructor.
41
42
    Triangle(Mesh* aMesh) 
      : Element(aMesh) 
43
44
45
    {}

    ~Triangle() {}
46

47
48
49
    /// implements Element::clone
    inline Element *clone() 
    { 
Thomas Witkowski's avatar
Thomas Witkowski committed
50
      return new Triangle(mesh); 
51
    }
52

53
54
55
    /// implements Element::getVertexOfEdge
    inline int getVertexOfEdge(int i, int j) const 
    {
56
      return vertexOfEdge[i][j];
57
    }
58

59
    /// implements Element::getVertexOfPosition
60
    int getVertexOfPosition(GeoIndex position,
61
62
			    int positionIndex,
			    int vertexIndex) const;
63

64
65
66
67
    /// implements Element::getGeo
    inline int getGeo(GeoIndex i) const 
    {
      switch (i) {
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
      case VERTEX: case PARTS: case NEIGH:
	return 3;
	break;
      case EDGE:
	return 3;
      case FACE:
	return 0;
      case CENTER:
	return 1;
	break;
      case DIMEN:
	return 2;
	break;
      case BOUNDARY:
	return 6;
	break;
      case PROJECTION:
	return 3;
	break;
      default:
	ERROR_EXIT("invalid geo-index\n");
	return 0;
      }
91
    }
92

93
    /// implements Element::hasSide
94
95
    bool hasSide(Element* sideElem) const;

96
    /// implements Element::sortFaceIndices
97
    const FixVec<int,WORLD>& sortFaceIndices(int face, FixVec<int,WORLD> *vec) const;
98

99
100
101
    /// implements Element::isLine. Returns false because this element is a Triangle
    inline bool isLine() const 
    { 
102
      return false; 
103
    }
104
 
105
106
107
    /// implements Element::isTriangle. Returns true because this element is a Triangle
    inline bool isTriangle() const 
    { 
108
      return true; 
109
    }
110

111
    /// implements Element::isTetrahedron. Returns false because this element is a Triangle
112
113
    inline bool isTetrahedron() const 
    { 
114
      return false; 
115
    }
116

117
118
119
    /// implements Element::getSideOfChild()
    virtual int getSideOfChild(int child, int side, int) const 
    {
120
      FUNCNAME("Triangle::getSideOfChild()");
121
122
      TEST_EXIT_DBG(child==0 || child==1)("child must be in (0,1)\n");
      TEST_EXIT_DBG(side >= 0 && side <= 2)("side must be between 0 and 2\n");
123
      return sideOfChild[child][side];
124
    }
125

126
127
128
    /// implements Element::getVertexOfParent()
    virtual int getVertexOfParent(int child, int side, int = 0) const 
    {
129
      FUNCNAME("Triangle::getVertexOfParent()");
130
131
      TEST_EXIT_DBG(child==0 || child==1)("child must be in (0,1)\n");
      TEST_EXIT_DBG(side >= 0 && side <= 2)("side must be between 0 and 2\n");
132
      return vertexOfParent[child][side];
133
    }
134

135
136
    virtual int getPositionOfVertex(int side, int vertex) const 
    {
137
138
      static int positionOfVertex[3][3] = {{-1,0,1},{1,-1,0},{0,1,-1}};
      return positionOfVertex[side][vertex];
139
    }
140

141
142
    inline int getEdgeOfFace(int face, int edge) const 
    {
143
144
      TEST_EXIT_DBG(face == 0)("face must be zero at triangle\n");
      TEST_EXIT_DBG(edge >= 0 && edge < 3)("invalid edge\n");
145
      return edge;
146
    }
147
 
148
149
    std::string getTypeName() const 
    { 
150
      return "Triangle"; 
151
    }
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167

  protected:
    /** \brief
     * vertexOfEdge[i][j] is the local number of the j-th vertex of the i-th 
     * edge of this element.
     */
    static const int vertexOfEdge[3][2];

    static const int sideOfChild[2][3];

    static const int vertexOfParent[2][3];
  };

}

#endif // AMDIS_TRIANGLE_H