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vtkCirclePackLayout.cxx
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vtkCirclePackLayout.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkCirclePackLayout.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 "vtkCirclePackLayout.h"
#include "vtkAdjacentVertexIterator.h"
#include "vtkCellArray.h"
#include "vtkCellData.h"
#include "vtkDataArray.h"
#include "vtkDoubleArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkPoints.h"
#include "vtkTree.h"
#include "vtkCirclePackLayoutStrategy.h"
#include "vtkTreeDFSIterator.h"
vtkStandardNewMacro(vtkCirclePackLayout);
vtkCirclePackLayout::vtkCirclePackLayout()
{
this->CirclesFieldName = 0;
this->LayoutStrategy = 0;
this->SetCirclesFieldName("circles");
this->SetSizeArrayName("size");
}
vtkCirclePackLayout::~vtkCirclePackLayout()
{
this->SetCirclesFieldName(0);
if (this->LayoutStrategy)
{
this->LayoutStrategy->Delete();
}
}
vtkCxxSetObjectMacro(vtkCirclePackLayout, LayoutStrategy, vtkCirclePackLayoutStrategy);
void vtkCirclePackLayout::prepareSizeArray(vtkDoubleArray* mySizeArray,
vtkTree* tree)
{
vtkTreeDFSIterator* dfs = vtkTreeDFSIterator::New();
dfs->SetMode(vtkTreeDFSIterator::FINISH);
dfs->SetTree(tree);
double currentLeafSize = 0.0;
while(dfs->HasNext())
{
vtkIdType vertex = dfs->Next();
if(tree->IsLeaf(vertex))
{
double size = mySizeArray->GetValue(vertex);
if(size == 0.0)
{
size = 1.0;
mySizeArray->SetValue(vertex, size);
}
currentLeafSize += size;
}
else
{
mySizeArray->SetValue(vertex, currentLeafSize);
}
}
dfs->Delete();
}
int vtkCirclePackLayout::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
if (this->LayoutStrategy == NULL)
{
vtkErrorMacro(<< "Layout strategy must be non-null.");
return 0;
}
if (this->CirclesFieldName == NULL)
{
vtkErrorMacro(<< "Circles field name must be non-null.");
return 0;
}
// get the info objects
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
// Storing the inputTree and outputTree handles
vtkTree *inputTree = vtkTree::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkTree *outputTree = vtkTree::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
// Check for size array on the input vtkTree.
vtkDataArray *sizeArray = this->GetInputArrayToProcess(0, inputTree);
vtkDoubleArray *mySizeArray = vtkDoubleArray::New();
if(sizeArray)
{
mySizeArray->DeepCopy(sizeArray);
}
else
{
mySizeArray->FillComponent(0,0.0);
mySizeArray->SetNumberOfTuples(inputTree->GetNumberOfVertices());
}
this->prepareSizeArray(mySizeArray, inputTree);
// Copy the input into the output
outputTree->ShallowCopy(inputTree);
// Add the 3-tuple array that will store the Xcenter, Ycenter, and Radius
vtkDoubleArray *coordsArray = vtkDoubleArray::New();
coordsArray->SetName(this->CirclesFieldName);
coordsArray->SetNumberOfComponents(3);
coordsArray->SetNumberOfTuples(inputTree->GetNumberOfVertices());
vtkDataSetAttributes *data = outputTree->GetVertexData();
data->AddArray(coordsArray);
coordsArray->Delete();
// Find circle packing layout
this->LayoutStrategy->Layout(inputTree, coordsArray, mySizeArray);
mySizeArray->Delete();
// Copy the coordinates from the layout into the Points field
vtkPoints* points = outputTree->GetPoints();
points->SetNumberOfPoints(coordsArray->GetNumberOfTuples());
for (int i = 0; i < coordsArray->GetNumberOfTuples(); ++i)
{
double where[3];
coordsArray->GetTuple(i, where);
where[2] = 0;
points->SetPoint(i, where);
}
return 1;
}
void vtkCirclePackLayout::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "CirclesFieldName: " << (this->CirclesFieldName ? this->CirclesFieldName : "(none)") << endl;
os << indent << "LayoutStrategy: " << (this->LayoutStrategy ? "" : "(none)") << endl;
if (this->LayoutStrategy)
{
this->LayoutStrategy->PrintSelf(os, indent.GetNextIndent());
}
}
vtkIdType vtkCirclePackLayout::FindVertex(double pnt[2], double *cinfo)
{
// Do we have an output?
vtkTree* otree = this->GetOutput();
if (!otree)
{
vtkErrorMacro(<< "Could not get output tree.");
return -1;
}
//Get the three tuple array for the points
vtkDataArray *array = otree->GetVertexData()->
GetArray(this->CirclesFieldName);
if (!array)
{
vtkErrorMacro(<< "Output Tree does not contain circle packing information.");
return -1;
}
// Check to see that we are in the dataset at all
double climits[3];
vtkIdType vertex = otree->GetRoot();
vtkDoubleArray *circleInfo = vtkArrayDownCast<vtkDoubleArray>(array);
// Now try to find the vertex that contains the point
circleInfo->GetTypedTuple(vertex, climits); // Get the extents of the root
if (pow((pnt[0]- climits[0]),2) + pow((pnt[1] - climits[1]),2) > pow(climits[2],2))
{
// Point is not in the tree at all
return -1;
}
// Now traverse the children to try and find
// the vertex that contains the point
vtkIdType child;
if (cinfo)
{
cinfo[0] = climits[0];
cinfo[1] = climits[1];
cinfo[2] = climits[2];
}
vtkAdjacentVertexIterator *it = vtkAdjacentVertexIterator::New();
otree->GetAdjacentVertices(vertex, it);
while (it->HasNext())
{
child = it->Next();
circleInfo->GetTypedTuple(child, climits); // Get the extents of the child
if (pow((pnt[0]- climits[0]),2) + pow((pnt[1] - climits[1]),2) > pow(climits[2],2))
{
continue;
}
// If we are here then the point is contained by the child
// So recurse down the children of this vertex
vertex = child;
if (cinfo)
{
cinfo[0] = climits[0];
cinfo[1] = climits[1];
cinfo[2] = climits[2];
}
otree->GetAdjacentVertices(vertex, it);
}
it->Delete();
return vertex;
}
void vtkCirclePackLayout::GetBoundingCircle(vtkIdType id, double *cinfo)
{
// Do we have an output?
vtkTree* otree = this->GetOutput();
if (!otree)
{
vtkErrorMacro(<< "Could not get output tree.");
return;
}
if(!cinfo)
{
vtkErrorMacro(<< "cinfo is NULL");
return;
}
//Get the three tuple array for the circle
vtkDataArray *array = otree->GetVertexData()->
GetArray(this->CirclesFieldName);
if (!array)
{
vtkErrorMacro(<< "Output Tree does not contain circle packing information.");
return;
}
vtkDoubleArray *boxInfo = vtkArrayDownCast<vtkDoubleArray>(array);
boxInfo->GetTypedTuple(id, cinfo);
}
vtkMTimeType vtkCirclePackLayout::GetMTime()
{
vtkMTimeType mTime = this->Superclass::GetMTime();
vtkMTimeType time;
if (this->LayoutStrategy != NULL)
{
time = this->LayoutStrategy->GetMTime();
mTime = (time > mTime ? time : mTime);
}
return mTime;
}