vtkForceDirectedLayoutStrategy.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkForceDirectedLayoutStrategy.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
/*-------------------------------------------------------------------------
  Copyright 2008 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
  the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
#ifndef vtkForceDirectedLayoutStrategy_h
#define vtkForceDirectedLayoutStrategy_h

#include "vtkInfovisLayoutModule.h" // For export macro
#include "vtkGraphLayoutStrategy.h"

class VTKINFOVISLAYOUT_EXPORT vtkForceDirectedLayoutStrategy : public vtkGraphLayoutStrategy
{
public:
  static vtkForceDirectedLayoutStrategy *New();

  vtkTypeMacro(vtkForceDirectedLayoutStrategy, vtkGraphLayoutStrategy);
  void PrintSelf(ostream& os, vtkIndent indent);


  vtkSetClampMacro(RandomSeed, int, 0, VTK_INT_MAX);
  vtkGetMacro(RandomSeed, int);


  vtkSetVector6Macro(GraphBounds,double);
  vtkGetVectorMacro(GraphBounds,double,6);


  vtkSetMacro(AutomaticBoundsComputation, int);
  vtkGetMacro(AutomaticBoundsComputation, int);
  vtkBooleanMacro(AutomaticBoundsComputation, int);


  vtkSetClampMacro(MaxNumberOfIterations, int, 0, VTK_INT_MAX);
  vtkGetMacro(MaxNumberOfIterations, int);


  vtkSetClampMacro(IterationsPerLayout, int, 0, VTK_INT_MAX);
  vtkGetMacro(IterationsPerLayout, int);


  vtkSetClampMacro(CoolDownRate, double, 0.01, VTK_DOUBLE_MAX);
  vtkGetMacro(CoolDownRate, double);


  vtkSetMacro(ThreeDimensionalLayout, int);
  vtkGetMacro(ThreeDimensionalLayout, int);
  vtkBooleanMacro(ThreeDimensionalLayout, int);


  vtkSetMacro(RandomInitialPoints, int);
  vtkGetMacro(RandomInitialPoints, int);
  vtkBooleanMacro(RandomInitialPoints, int);


  vtkSetClampMacro(InitialTemperature, float, 0.0, VTK_FLOAT_MAX);
  vtkGetMacro(InitialTemperature, float);

  virtual void Initialize();

  virtual void Layout();

  virtual int IsLayoutComplete() {return this->LayoutComplete;}

protected:
  vtkForceDirectedLayoutStrategy();
  ~vtkForceDirectedLayoutStrategy();

  double GraphBounds[6];
  int   AutomaticBoundsComputation;  //Boolean controls automatic bounds calc.
  int   MaxNumberOfIterations;  //Maximum number of iterations.
  double CoolDownRate;  //Cool-down rate.  Note:  Higher # = Slower rate.
  double InitialTemperature;
  int   ThreeDimensionalLayout;  //Boolean for a third dimension.
  int RandomInitialPoints; //Boolean for having random points
private:

  // A vertex contains a position and a displacement.
  typedef struct
  {
    double x[3];
    double d[3];
  } vtkLayoutVertex;

  // An edge consists of two vertices joined together.
  // This struct acts as a "pointer" to those two vertices.
  typedef struct
  {
    int t;
    int u;
  } vtkLayoutEdge;

  int RandomSeed;
  int IterationsPerLayout;
  int TotalIterations;
  int LayoutComplete;
  double Temp;
  double optDist;
  vtkLayoutVertex *v;
  vtkLayoutEdge *e;

  vtkForceDirectedLayoutStrategy(const vtkForceDirectedLayoutStrategy&) VTK_DELETE_FUNCTION;
  void operator=(const vtkForceDirectedLayoutStrategy&) VTK_DELETE_FUNCTION;
};

#endif