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97 lines
3.6 KiB
C
97 lines
3.6 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkCirclePackFrontChainLayoutStrategy.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/*-------------------------------------------------------------------------
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Copyright 2008 Sandia Corporation.
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Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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the U.S. Government retains certain rights in this software.
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-------------------------------------------------------------------------*/
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/**
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* @class vtkCirclePackFrontChainLayoutStrategy
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* @brief layout a vtkTree into packed circles
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* using the front chain algorithm.
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*
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*
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* vtkCirclePackFrontChainLayoutStrategy assigns circles to each node of the input vtkTree
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* using the front chain algorithm. The algorithm packs circles by searching a "front
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* chain" of circles around the perimeter of the circles that have already been packed for
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* the current level in the tree hierarchy. Searching the front chain is in general faster
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* than searching all of the circles that have been packed at the current level.
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*
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* WARNING: The algorithm tends to break down and produce packings with overlapping
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* circles when there is a large difference in the radii of the circles at a given
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* level of the tree hierarchy. Roughly on the order a 1000:1 ratio of circle radii.
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*
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* Please see the following reference for more details on the algorithm.
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*
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* Title: "Visualization of large hierarchical data by circle packing"
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* Authors: Weixin Wang, Hui Wang, Guozhong Dai, Hongan Wang
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* Conference: Proceedings of the SIGCHI conference on Human Factors in computing systems
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* Year: 2006
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*
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*/
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#ifndef vtkCirclePackFrontChainLayoutStrategy_h
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#define vtkCirclePackFrontChainLayoutStrategy_h
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#include "vtkInfovisLayoutModule.h" // For export macro
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#include "vtkCirclePackLayoutStrategy.h"
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class vtkCirclePackFrontChainLayoutStrategyImplementation;
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class VTKINFOVISLAYOUT_EXPORT vtkCirclePackFrontChainLayoutStrategy : public vtkCirclePackLayoutStrategy
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{
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public:
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static vtkCirclePackFrontChainLayoutStrategy *New();
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vtkTypeMacro(vtkCirclePackFrontChainLayoutStrategy,vtkCirclePackLayoutStrategy);
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void PrintSelf(ostream& os, vtkIndent indent);
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/**
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* Perform the layout of the input tree, and store the circle
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* bounds of each vertex as a tuple in a data array.
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* (Xcenter, Ycenter, Radius).
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*/
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virtual void Layout(vtkTree *inputTree, vtkDataArray *areaArray,
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vtkDataArray* sizeArray);
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//@{
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/**
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* Width and Height define the size of the output window that the
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* circle packing is placed inside. Defaults to Width 1, Height 1
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*/
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vtkGetMacro(Width, int);
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vtkSetMacro(Width, int);
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vtkGetMacro(Height, int);
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vtkSetMacro(Height, int);
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//@}
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protected:
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vtkCirclePackFrontChainLayoutStrategy();
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~vtkCirclePackFrontChainLayoutStrategy();
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char * CirclesFieldName;
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int Width;
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int Height;
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private:
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vtkCirclePackFrontChainLayoutStrategyImplementation* pimpl; // Private implementation
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vtkCirclePackFrontChainLayoutStrategy(const vtkCirclePackFrontChainLayoutStrategy&) VTK_DELETE_FUNCTION;
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void operator=(const vtkCirclePackFrontChainLayoutStrategy&) VTK_DELETE_FUNCTION;
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};
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#endif
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