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/*=========================================================================
Program: Visualization Toolkit
Module: vtkBoxLayoutStrategy.cxx
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.
-------------------------------------------------------------------------*/
#include "vtkBoxLayoutStrategy.h"
#include "vtkAdjacentVertexIterator.h"
#include "vtkCellArray.h"
#include "vtkCellData.h"
#include "vtkDataArray.h"
#include "vtkFloatArray.h"
#include "vtkMath.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkSmartPointer.h"
#include "vtkTree.h"
#include "vtkTreeDFSIterator.h"
vtkStandardNewMacro(vtkBoxLayoutStrategy);
vtkBoxLayoutStrategy::vtkBoxLayoutStrategy()
{
}
vtkBoxLayoutStrategy::~vtkBoxLayoutStrategy()
{
}
void vtkBoxLayoutStrategy::Layout(
vtkTree* inputTree,
vtkDataArray* coordsArray,
vtkDataArray* vtkNotUsed(sizeArray))
{
if (!inputTree)
{
return;
}
if (!coordsArray)
{
vtkErrorMacro("Area array not defined.");
return;
}
vtkSmartPointer<vtkTreeDFSIterator> dfs =
vtkSmartPointer<vtkTreeDFSIterator>::New();
dfs->SetTree(inputTree);
float coords[4];
vtkSmartPointer<vtkAdjacentVertexIterator> children =
vtkSmartPointer<vtkAdjacentVertexIterator>::New();
while (dfs->HasNext())
{
vtkIdType vertex = dfs->Next();
if (vertex == inputTree->GetRoot())
{
coords[0] = 0; coords[1] = 1; coords[2] = 0; coords[3] = 1;
coordsArray->SetTuple(vertex, coords);
inputTree->GetPoints()->SetPoint(vertex,
(coords[0] + coords[1])/2.0,
(coords[2] + coords[3])/2.0,
0.0);
}
double doubleCoords[4];
coordsArray->GetTuple(vertex, doubleCoords);
for (int i = 0; i < 4; i++)
{
coords[i] = doubleCoords[i];
}
this->AddBorder(coords);
float parentMinX = coords[0];
float parentMaxX = coords[1];
float parentMinY = coords[2];
float parentMaxY = coords[3];
float xSpace = parentMaxX - parentMinX;
float ySpace = parentMaxY - parentMinY;
vtkIdType nchildren = inputTree->GetNumberOfChildren(vertex);
if (!inputTree->IsLeaf(vertex))
{
// Divide the available space with simple algo
int xDivisions =
static_cast<int>(sqrt(static_cast<double>(nchildren))+1); // Ceiling
int yDivisions = xDivisions;
// Okay try shrinking the bounds
if ((xDivisions-1)*yDivisions >= nchildren)
--xDivisions;
if (xDivisions*(yDivisions-1) >= nchildren)
--yDivisions;
// Get the children
inputTree->GetChildren(vertex, children);
// Now break up the space evenly and pack
float xDelta = xSpace / xDivisions;
float yDelta = ySpace / yDivisions;
for (int i = 0; i < yDivisions; i++)
{
for (int j = 0; j < xDivisions; j++)
{
// Check to see if we have more children
if (!children->HasNext())
{
break;
}
vtkIdType child = children->Next();
// Give children their positions
coords[0] =
parentMinX + xDelta * j;// minX
coords[1] =
parentMinX + xDelta * (j + 1.0);// maxX
coords[2] =
parentMinY + ySpace - yDelta * (i + 1.0);// minY
coords[3] =
parentMinY + ySpace - yDelta*i;// maxY
coordsArray->SetTuple(child, coords);
inputTree->GetPoints()->SetPoint(child,
(coords[0] + coords[1])/2.0,
(coords[2] + coords[3])/2.0,
0.0);
}
}
}
}
}
void vtkBoxLayoutStrategy::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
}
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