ext/OGDF/src/energybased/EnergyFunction.cpp

   1 /*
   2  * $Revision: 2552 $
   3  *
   4  * last checkin:
   5  *   $Author: gutwenger $
   6  *   $Date: 2012-07-05 16:45:20 +0200 (Do, 05. Jul 2012) $
   7  ***************************************************************/
   8
   9 /** \file
  10  * \brief Implements class EnergyFunction.
  11  *
  12  * \author Rene Weiskircher
  13  *
  14  * \par License:
  15  * This file is part of the Open Graph Drawing Framework (OGDF).
  16  *
  17  * \par
  18  * Copyright (C)<br>
  19  * See README.txt in the root directory of the OGDF installation for details.
  20  *
  21  * \par
  22  * This program is free software; you can redistribute it and/or
  23  * modify it under the terms of the GNU General Public License
  24  * Version 2 or 3 as published by the Free Software Foundation;
  25  * see the file LICENSE.txt included in the packaging of this file
  26  * for details.
  27  *
  28  * \par
  29  * This program is distributed in the hope that it will be useful,
  30  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  31  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  32  * GNU General Public License for more details.
  33  *
  34  * \par
  35  * You should have received a copy of the GNU General Public
  36  * License along with this program; if not, write to the Free
  37  * Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  38  * Boston, MA 02110-1301, USA.
  39  *
  40  * \see  http://www.gnu.org/copyleft/gpl.html
  41  ***************************************************************/
  42
  43
  44 #include <ogdf/internal/energybased/EnergyFunction.h>
  45
  46 namespace ogdf {
  47
  48 EnergyFunction::EnergyFunction(const String &funcname, GraphAttributes &AG) :
  49         m_G(AG.constGraph()),
  50         m_name(funcname),
  51         m_candidateEnergy(0),
  52         m_energy(0),
  53         m_AG(AG),
  54         m_testNode(NULL),
  55         m_testPos(0.0,0.0) { }
  56
  57
  58 void EnergyFunction::candidateTaken()
  59 {
  60         m_energy=m_candidateEnergy;
  61         m_candidateEnergy = 0.0;
  62         m_AG.x(m_testNode)=m_testPos.m_x;
  63         m_AG.y(m_testNode)=m_testPos.m_y;
  64         m_testPos = DPoint(0.0,0.0);
  65         internalCandidateTaken();
  66         m_testNode=NULL;
  67 }
  68
  69
  70 double EnergyFunction::computeCandidateEnergy(const node v, const DPoint &testPos)
  71 {
  72         m_testPos = testPos;
  73         m_testNode = v;
  74         compCandEnergy();
  75         OGDF_ASSERT(m_candidateEnergy >= 0.0);
  76         return m_candidateEnergy;
  77 }
  78
  79
  80 #ifdef OGDF_DEBUG
  81 void EnergyFunction::printStatus() const{
  82         cout << "\nEnergy function name: " << m_name;
  83         cout << "\nCurrent energy: " << m_energy;
  84         node v;
  85         cout << "\nPosition of nodes in current solution:";
  86         NodeArray<int> num(m_G);
  87         int count = 1;
  88         forall_nodes(v,m_G) num[v] = count ++;
  89         forall_nodes(v,m_G) {
  90                 cout << "\nNode: " << num[v] << " Position: " << currentPos(v);
  91         }
  92         cout << "\nTest Node: " << m_testNode << " New coordinates: " << m_testPos;
  93         cout << "\nCandidate energy: " << m_candidateEnergy;
  94         printInternalData();
  95 }
  96 #endif
  97
  98 } //namespace