dox/Infovis/vtkConeLayoutStrategy.h

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

  Program:   Visualization Toolkit
  Module:    vtkConeLayoutStrategy.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 __vtkConeLayoutStrategy_h
#define __vtkConeLayoutStrategy_h

#include "vtkGraphLayoutStrategy.h"

class vtkPoints;

class VTK_INFOVIS_EXPORT vtkConeLayoutStrategy : public vtkGraphLayoutStrategy 
{
public:
  static vtkConeLayoutStrategy *New();

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


  vtkSetMacro(Compactness, float);
  vtkGetMacro(Compactness, float);


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


  vtkSetMacro(Spacing, float);
  vtkGetMacro(Spacing, float);


  void Layout();
  
protected:
  vtkConeLayoutStrategy();
  ~vtkConeLayoutStrategy();

  double LocalPlacement(vtkIdType root, vtkPoints *points);
            
  void GlobalPlacement(
    vtkIdType root,
    vtkPoints *points,
    double refX,         // absolute x-y coordinate of
    double refY,         // parent node; z coordinate
    double level );      // derived from level.

  float Compactness;     // factor used in mapping layer to Z
  int   Compression;     // force a compact layout?
  float Spacing;         // Scale vertical spacing of cones.

  // Values accumulated for possible statistical use
  double MinRadius;
  double MaxRadius;
  int   NrCones;
  double SumOfRadii;
  
private:
  vtkConeLayoutStrategy(const vtkConeLayoutStrategy&);  // Not implemented.
  void operator=(const vtkConeLayoutStrategy&);  // Not implemented.
};

#endif