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vtkSliceAndDiceLayoutStrategy.cxx
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vtkSliceAndDiceLayoutStrategy.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkSliceAndDiceLayoutStrategy.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 "vtkSliceAndDiceLayoutStrategy.h"
#include "vtkAdjacentVertexIterator.h"
#include "vtkCellArray.h"
#include "vtkCellData.h"
#include "vtkDataArray.h"
#include "vtkFloatArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkSmartPointer.h"
#include "vtkTree.h"
#include "vtkTreeDFSIterator.h"
vtkStandardNewMacro(vtkSliceAndDiceLayoutStrategy);
vtkSliceAndDiceLayoutStrategy::vtkSliceAndDiceLayoutStrategy() = default;
vtkSliceAndDiceLayoutStrategy::~vtkSliceAndDiceLayoutStrategy() = default;
void vtkSliceAndDiceLayoutStrategy::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
// Alternating tree layout method
void vtkSliceAndDiceLayoutStrategy::Layout(
vtkTree* inputTree, vtkDataArray* coordsArray, vtkDataArray* sizeArray)
{
if (!inputTree)
{
return;
}
if (!coordsArray)
{
vtkErrorMacro("Area array undefined.");
return;
}
vtkSmartPointer<vtkTreeDFSIterator> dfs = vtkSmartPointer<vtkTreeDFSIterator>::New();
dfs->SetTree(inputTree);
float coords[4];
vtkSmartPointer<vtkAdjacentVertexIterator> it = vtkSmartPointer<vtkAdjacentVertexIterator>::New();
while (dfs->HasNext())
{
vtkIdType vertex = dfs->Next();
bool vertical = (inputTree->GetLevel(vertex) % 2) == 1;
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;
inputTree->GetChildren(vertex, it);
float total = 0;
while (it->HasNext())
{
if (sizeArray)
{
total += static_cast<float>(sizeArray->GetTuple1(it->Next()));
}
else
{
total += 1.0f;
}
}
inputTree->GetChildren(vertex, it);
// Give children their positions
float part = 0;
float oldDelta = 0;
float delta = 0;
while (it->HasNext())
{
vtkIdType child = it->Next();
if (sizeArray)
{
part += static_cast<float>(sizeArray->GetTuple1(child));
}
else
{
part += 1.0f;
}
oldDelta = delta;
if (vertical)
{
delta = xSpace * (part / total);
coords[0] = parentMinX + oldDelta; // minX
coords[1] = parentMinX + delta; // maxX
coords[2] = parentMinY; // minY
coords[3] = parentMaxY; // maxY
}
else
{
delta = ySpace * (part / total);
coords[0] = parentMinX; // minX
coords[1] = parentMaxX; // maxX
coords[2] = parentMaxY - delta; // maxY
coords[3] = parentMaxY - oldDelta; // minY
}
coordsArray->SetTuple(child, coords);
inputTree->GetPoints()->SetPoint(
child, (coords[0] + coords[1]) / 2.0, (coords[2] + coords[3]) / 2.0, 0.0);
}
}
}