Line data    Source code

       1              : /*
       2              :  * Copyright (c) 2012-2015:  G-CSC, Goethe University Frankfurt
       3              :  * Author: Andreas Vogel
       4              :  * 
       5              :  * This file is part of UG4.
       6              :  * 
       7              :  * UG4 is free software: you can redistribute it and/or modify it under the
       8              :  * terms of the GNU Lesser General Public License version 3 (as published by the
       9              :  * Free Software Foundation) with the following additional attribution
      10              :  * requirements (according to LGPL/GPL v3 §7):
      11              :  * 
      12              :  * (1) The following notice must be displayed in the Appropriate Legal Notices
      13              :  * of covered and combined works: "Based on UG4 (www.ug4.org/license)".
      14              :  * 
      15              :  * (2) The following notice must be displayed at a prominent place in the
      16              :  * terminal output of covered works: "Based on UG4 (www.ug4.org/license)".
      17              :  * 
      18              :  * (3) The following bibliography is recommended for citation and must be
      19              :  * preserved in all covered files:
      20              :  * "Reiter, S., Vogel, A., Heppner, I., Rupp, M., and Wittum, G. A massively
      21              :  *   parallel geometric multigrid solver on hierarchically distributed grids.
      22              :  *   Computing and visualization in science 16, 4 (2013), 151-164"
      23              :  * "Vogel, A., Reiter, S., Rupp, M., Nägel, A., and Wittum, G. UG4 -- a novel
      24              :  *   flexible software system for simulating pde based models on high performance
      25              :  *   computers. Computing and visualization in science 16, 4 (2013), 165-179"
      26              :  * 
      27              :  * This program is distributed in the hope that it will be useful,
      28              :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      29              :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      30              :  * GNU Lesser General Public License for more details.
      31              :  */
      32              : 
      33              : #ifndef __H__UG__LIB_DISC__REFERENCE_ELEMENT__REFERENCE_ELEMENT_UTIL__
      34              : #define __H__UG__LIB_DISC__REFERENCE_ELEMENT__REFERENCE_ELEMENT_UTIL__
      35              : 
      36              : 
      37              : namespace ug{
      38              : 
      39              : /// returns the reference element dimension at run-time
      40            0 : inline int ReferenceElementDimension(ReferenceObjectID roid)
      41              : {
      42              :         switch(roid)
      43              :         {
      44              :                 case ROID_VERTEX: return 0;
      45              :                 case ROID_EDGE: return 1;
      46              :                 case ROID_TRIANGLE: return 2;
      47              :                 case ROID_QUADRILATERAL: return 2;
      48              :                 case ROID_TETRAHEDRON: return 3;
      49              :                 case ROID_OCTAHEDRON: return 3;
      50              :                 case ROID_PYRAMID: return 3;
      51              :                 case ROID_PRISM: return 3;
      52              :                 case ROID_HEXAHEDRON: return 3;
      53            0 :                 default:UG_THROW("ReferenceElementDimension: ReferenceObjectId "
      54              :                                                  <<roid<<" not found.");
      55              :         }
      56              : }
      57              : 
      58              : /// returns the Center of a reference element at run-time
      59              : template <int dim>
      60              : inline MathVector<dim> ReferenceElementCenter(ReferenceObjectID roid);
      61              : 
      62              : template <>
      63            0 : inline MathVector<1> ReferenceElementCenter<1>(ReferenceObjectID roid)
      64              : {
      65            0 :         switch(roid)
      66              :         {
      67            0 :                 case ROID_EDGE: return MathVector<1>(0.5);
      68            0 :                 default: UG_THROW("ReferenceObject "<<roid<<" not found in dim 1.");
      69              :         }
      70              : }
      71              : 
      72              : template <>
      73            0 : inline MathVector<2> ReferenceElementCenter<2>(ReferenceObjectID roid)
      74              : {
      75            0 :         switch(roid)
      76              :         {
      77              :                 case ROID_TRIANGLE: return MathVector<2>(1.0/3.0, 1.0/3.0);
      78              :                 case ROID_QUADRILATERAL: return MathVector<2>(0.5, 0.5);
      79            0 :                 default: UG_THROW("ReferenceObject "<<roid<<" not found in dim 2.");
      80              :         }
      81              : }
      82              : 
      83              : template <>
      84            0 : inline MathVector<3> ReferenceElementCenter<3>(ReferenceObjectID roid)
      85              : {
      86            0 :         switch(roid)
      87              :         {
      88              :                 case ROID_TETRAHEDRON: return MathVector<3>(0.25, 0.25, 0.25);
      89              :                 case ROID_PYRAMID: return MathVector<3>(2./5., 2./5., 1./5.);
      90              :                 case ROID_PRISM: return MathVector<3>(2./6., 2./6., 0.5);
      91              :                 case ROID_HEXAHEDRON: return MathVector<3>(0.5, 0.5, 0.5);
      92              :                 case ROID_OCTAHEDRON: return MathVector<3>(2./6., 2./6., 0.0);
      93            0 :                 default: UG_THROW("ReferenceObject "<<roid<<" not found in dim 3.");
      94              :         }
      95              : }
      96              : 
      97              : 
      98              : } // end namespace ug
      99              : 
     100              : #endif /* __H__UG__LIB_DISC__REFERENCE_ELEMENT__REFERENCE_ELEMENT_UTIL__ */