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83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkSquarifyLayoutStrategy.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 vtkSquarifyLayoutStrategy
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* @brief uses the squarify tree map layout algorithm
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*
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*
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* vtkSquarifyLayoutStrategy partitions the space for child vertices into regions
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* that use all available space and are as close to squares as possible.
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* The algorithm also takes into account the relative vertex size.
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*
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* @par Thanks:
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* The squarified tree map algorithm comes from:
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* Bruls, D.M., C. Huizing, J.J. van Wijk. Squarified Treemaps.
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* In: W. de Leeuw, R. van Liere (eds.), Data Visualization 2000,
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* Proceedings of the joint Eurographics and IEEE TCVG Symposium on Visualization,
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* 2000, Springer, Vienna, p. 33-42.
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*/
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#ifndef vtkSquarifyLayoutStrategy_h
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#define vtkSquarifyLayoutStrategy_h
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#include "vtkInfovisLayoutModule.h" // For export macro
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#include "vtkTreeMapLayoutStrategy.h"
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class vtkIdList;
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class VTKINFOVISLAYOUT_EXPORT vtkSquarifyLayoutStrategy : public vtkTreeMapLayoutStrategy
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{
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public:
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static vtkSquarifyLayoutStrategy *New();
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vtkTypeMacro(vtkSquarifyLayoutStrategy,vtkTreeMapLayoutStrategy);
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void PrintSelf(ostream& os, vtkIndent indent);
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/**
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* Perform the layout of a tree and place the results as 4-tuples in
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* coordsArray (Xmin, Xmax, Ymin, Ymax).
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*/
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void Layout(
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vtkTree* inputTree,
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vtkDataArray* coordsArray,
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vtkDataArray* sizeArray);
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protected:
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vtkSquarifyLayoutStrategy();
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~vtkSquarifyLayoutStrategy();
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private:
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void LayoutChildren(
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vtkTree *tree,
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vtkDataArray *coordsArray,
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vtkDataArray *sizeArray,
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vtkIdType nchildren,
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vtkIdType parent,
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vtkIdType begin,
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float minX, float maxX,
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float minY, float maxY);
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vtkSquarifyLayoutStrategy(const vtkSquarifyLayoutStrategy&) VTK_DELETE_FUNCTION;
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void operator=(const vtkSquarifyLayoutStrategy&) VTK_DELETE_FUNCTION;
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};
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#endif
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