Line data    Source code

       1              : /*
       2              :  * Copyright (c) 2014-2015:  G-CSC, Goethe University Frankfurt
       3              :  * Author: Sebastian Reiter
       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_NORMAL_CALCULATION_IMPL__
      34              : #define __H__UG_NORMAL_CALCULATION_IMPL__
      35              : 
      36              : #include "normal_calculation.h"
      37              : #include "geom_obj_util/face_util.h"
      38              : #include "common/math/ugmath.h"
      39              : 
      40              : namespace ug{
      41              : 
      42              : template <class TAAPos>
      43              : inline typename TAAPos::ValueType
      44              : CalculateOuterNormal(Vertex* v, int sideIndex, TAAPos aaPos)
      45              : {
      46              :         typename TAAPos::ValueType n;
      47              :         VecSet(n, 0);
      48              :         return n;
      49              : }
      50              : 
      51              : template <class TAAPos>
      52              : inline typename TAAPos::ValueType
      53            0 : CalculateOuterNormal(Edge* e, int sideIndex, TAAPos aaPos)
      54              : {
      55              :         typename TAAPos::ValueType n;
      56            0 :         VecSubtract(n, aaPos[e->vertex(sideIndex)],
      57            0 :                                 aaPos[e->vertex((sideIndex + 1) % 2)]);
      58            0 :         VecNormalize(n, n);
      59            0 :         return n;
      60              : }
      61              : 
      62              : template <class TAAPos>
      63              : inline typename TAAPos::ValueType
      64            0 : CalculateOuterNormal(Face* f, int sideIndex, TAAPos aaPos)
      65              : {
      66              :         typename TAAPos::ValueType c, n;
      67            0 :         c = CalculateCenter(f, aaPos);
      68            0 :         EdgeDescriptor ed;
      69            0 :         f->edge_desc(sideIndex, ed);
      70              : 
      71            0 :         DropAPerpendicular(n, c, aaPos[ed.vertex(0)], aaPos[ed.vertex(1)]);
      72              :         VecSubtract(n, n, c);
      73            0 :         VecNormalize(n, n);
      74            0 :         return n;
      75              : }
      76              : 
      77              : template <class TAAPos>
      78              : inline typename TAAPos::ValueType
      79            0 : CalculateOuterNormal(Volume* v, int sideIndex, TAAPos aaPos)
      80              : {
      81              :         typename TAAPos::ValueType n;
      82            0 :         FaceDescriptor fd;
      83            0 :         v->face_desc(sideIndex, fd);
      84            0 :         CalculateNormal(n, &fd, aaPos);
      85            0 :         return n;
      86              : }
      87              : 
      88              : template <class TAAPos>
      89              : inline typename TAAPos::ValueType
      90              : CalculateOuterNormal(GridObject* o, int sideIndex, TAAPos aaPos)
      91              : {
      92              :         int baseObjId = o->base_object_id();
      93              :         switch(baseObjId){
      94              :                 case VERTEX:
      95              :                         return CalculateOuterNormal(static_cast<Vertex*>(o), sideIndex, aaPos);
      96              :                 case EDGE:
      97              :                         return CalculateOuterNormal(static_cast<Edge*>(o), sideIndex, aaPos);
      98              :                 case FACE:
      99              :                         return CalculateOuterNormal(static_cast<Face*>(o), sideIndex, aaPos);
     100              :                 case VOLUME:
     101              :                         return CalculateOuterNormal(static_cast<Volume*>(o), sideIndex, aaPos);
     102              :         }
     103              :         UG_THROW("Unsupported base object id in CalculateOuterNormal");
     104              : }
     105              : 
     106              : 
     107              : inline vector2
     108              : CalculateNormal(EdgeVertices* edge,
     109              :                                 Grid::AttachmentAccessor<Vertex, Attachment<vector2> >& aaPos)
     110              : {
     111              :         vector2 d;
     112              :         VecSubtract(d, aaPos[edge->vertex(1)], aaPos[edge->vertex(0)]);
     113              :         VecNormalize(d, d);
     114              :         return vector2(d.y(), -d.x());
     115              : }
     116              : 
     117              : 
     118              : inline vector3
     119              : CalculateNormal(FaceVertices* face,
     120              :                                 Grid::AttachmentAccessor<Vertex, Attachment<vector3> >& aaPos)
     121              : {
     122              :         vector3 n;
     123              :         CalculateNormal(n, face, aaPos);
     124              :         return n;
     125              : }
     126              : 
     127              : }//     end of namespace
     128              : 
     129              : #endif