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/*=========================================================================
Program: Visualization Toolkit
Module: TestGraphLayoutStrategy.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 "vtkCircularLayoutStrategy.h"
#include "vtkEdgeListIterator.h"
#include "vtkFast2DLayoutStrategy.h"
#include "vtkForceDirectedLayoutStrategy.h"
#include "vtkGraphLayout.h"
#include "vtkMath.h"
#include "vtkPassThroughLayoutStrategy.h"
#include "vtkRandomGraphSource.h"
#include "vtkRandomLayoutStrategy.h"
#include "vtkSimple2DLayoutStrategy.h"
#include "vtkSmartPointer.h"
#include "vtkTestUtilities.h"
#include "vtkTreeLayoutStrategy.h"
#define VTK_CREATE(type, name) \
vtkSmartPointer<type> name = vtkSmartPointer<type>::New()
int TestGraphLayoutStrategy(int vtkNotUsed(argc), char* vtkNotUsed(argv)[])
{
int errors = 0;
// Create input graph
vtkIdType numVert = 100;
vtkIdType numEdges = 150;
VTK_CREATE(vtkRandomGraphSource, source);
source->SetNumberOfVertices(numVert);
source->SetNumberOfEdges(numEdges);
VTK_CREATE(vtkGraphLayout, layout);
layout->SetInputConnection(source->GetOutputPort());
vtkGraph *output = NULL;
double pt[3] = {0.0, 0.0, 0.0};
double pt2[3] = {0.0, 0.0, 0.0};
double eps = 1.0e-6;
double length = 0.0;
double tol = 50.0;
cerr << "Testing vtkCircularLayoutStrategy..." << endl;
VTK_CREATE(vtkCircularLayoutStrategy, circular);
layout->SetLayoutStrategy(circular);
layout->Update();
output = layout->GetOutput();
for (vtkIdType i = 0; i < numVert; i++)
{
output->GetPoint(i, pt);
double dist = pt[0]*pt[0] + pt[1]*pt[1] - 1.0;
dist = dist > 0 ? dist : -dist;
if (dist > eps || pt[2] != 0.0)
{
cerr << "ERROR: Point " << i << " is not on the unit circle." << endl;
errors++;
}
}
cerr << "...done." << endl;
cerr << "Testing vtkFast2DLayoutStrategy..." << endl;
VTK_CREATE(vtkFast2DLayoutStrategy, fast);
fast->SetRestDistance(1.0f);
length = fast->GetRestDistance();
layout->SetLayoutStrategy(fast);
layout->Update();
output = layout->GetOutput();
VTK_CREATE(vtkEdgeListIterator, edges);
output->GetEdges(edges);
while (edges->HasNext())
{
vtkEdgeType e = edges->Next();
vtkIdType u = e.Source;
vtkIdType v = e.Target;
output->GetPoint(u, pt);
output->GetPoint(v, pt2);
double dist = sqrt(vtkMath::Distance2BetweenPoints(pt, pt2));
if (dist < length/tol || dist > length*tol)
{
cerr << "ERROR: Edge " << u << "," << v << " distance is " << dist
<< " but resting distance is " << length << endl;
errors++;
}
if (pt[2] != 0.0)
{
cerr << "ERROR: Point " << u << " not on the xy plane" << endl;
errors++;
}
if (pt2[2] != 0.0)
{
cerr << "ERROR: Point " << v << " not on the xy plane" << endl;
errors++;
}
}
cerr << "...done." << endl;
cerr << "Testing vtkForceDirectedLayoutStrategy..." << endl;
VTK_CREATE(vtkForceDirectedLayoutStrategy, force);
length = pow(1.0/numVert, 1.0/3.0);
layout->SetLayoutStrategy(force);
layout->Update();
output = layout->GetOutput();
output->GetEdges(edges);
while (edges->HasNext())
{
vtkEdgeType e = edges->Next();
vtkIdType u = e.Source;
vtkIdType v = e.Target;
output->GetPoint(u, pt);
output->GetPoint(v, pt2);
double dist = sqrt(vtkMath::Distance2BetweenPoints(pt, pt2));
if (dist < length/tol || dist > length*tol)
{
cerr << "ERROR: Edge " << u << "," << v << " distance is " << dist
<< " but resting distance is " << length << endl;
errors++;
}
}
cerr << "...done." << endl;
cerr << "Testing vtkPassThroughLayoutStrategy..." << endl;
VTK_CREATE(vtkPassThroughLayoutStrategy, pass);
layout->SetLayoutStrategy(pass);
layout->Update();
output = layout->GetOutput();
for (vtkIdType i = 0; i < numVert; i++)
{
output->GetPoint(i, pt);
if (pt[0] != 0.0 || pt[1] != 0.0 || pt[2] != 0.0)
{
cerr << "ERROR: Point " << i << " is not 0,0,0." << endl;
errors++;
}
}
cerr << "...done." << endl;
cerr << "Testing vtkRandomLayoutStrategy..." << endl;
VTK_CREATE(vtkRandomLayoutStrategy, random);
double bounds[6] = {0, 0, 0, 0, 0, 0};
random->GetGraphBounds(bounds);
layout->SetLayoutStrategy(random);
layout->Update();
output = layout->GetOutput();
for (vtkIdType i = 0; i < numVert; i++)
{
output->GetPoint(i, pt);
if (pt[0] < bounds[0] || pt[0] > bounds[1]
|| pt[1] < bounds[2] || pt[1] > bounds[3]
|| pt[2] < bounds[4] || pt[2] > bounds[5])
{
cerr << "ERROR: Point " << i << " is not within the bounds." << endl;
errors++;
}
}
cerr << "...done." << endl;
cerr << "Testing vtkSimple2DLayoutStrategy..." << endl;
VTK_CREATE(vtkSimple2DLayoutStrategy, simple);
simple->SetRestDistance(1.0f);
length = simple->GetRestDistance();
layout->SetLayoutStrategy(simple);
layout->Update();
output = layout->GetOutput();
output->GetEdges(edges);
while (edges->HasNext())
{
vtkEdgeType e = edges->Next();
vtkIdType u = e.Source;
vtkIdType v = e.Target;
output->GetPoint(u, pt);
output->GetPoint(v, pt2);
double dist = sqrt(vtkMath::Distance2BetweenPoints(pt, pt2));
if (dist < length/tol || dist > length*tol)
{
cerr << "ERROR: Edge " << u << "," << v << " distance is " << dist
<< " but resting distance is " << length << endl;
errors++;
}
if (pt[2] != 0.0)
{
cerr << "ERROR: Point " << u << " not on the xy plane" << endl;
errors++;
}
if (pt2[2] != 0.0)
{
cerr << "ERROR: Point " << v << " not on the xy plane" << endl;
errors++;
}
}
cerr << "...done." << endl;
return errors;
}
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