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/*=========================================================================
Program: Visualization Toolkit
Module: TestExtractHistogram.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.
=========================================================================*/
#include "vtkCellData.h"
#include "vtkDoubleArray.h"
#include "vtkExtractHistogram.h"
#include "vtkTable.h"
#include "vtkSmartPointer.h"
#include "vtkSphereSource.h"
#include "vtkIntArray.h"
/// Test the output of the vtkExtractHistogram filter in a simple serial case
int TestExtractHistogram(int, char*[])
{
vtkSmartPointer<vtkSphereSource> sphere = vtkSmartPointer<vtkSphereSource>::New();
vtkSmartPointer<vtkExtractHistogram> extraction = vtkSmartPointer<vtkExtractHistogram>::New();
const int bin_count = 3;
extraction->SetInputConnection(sphere->GetOutputPort());
extraction->SetInputArrayToProcess(0, 0, 0, vtkDataSet::FIELD_ASSOCIATION_POINTS_THEN_CELLS,
"Normals");
extraction->SetComponent(0);
extraction->SetBinCount(bin_count);
extraction->Update();
vtkTable* const histogram = extraction->GetOutput();
vtkDoubleArray* const bin_extents = vtkDoubleArray::SafeDownCast(
histogram->GetRowData()->GetArray("bin_extents"));
if(!bin_extents)
{
vtkGenericWarningMacro("No bin extents found.");
return 1;
}
if(bin_extents->GetNumberOfComponents() != 1)
{
vtkGenericWarningMacro("XCoordinates must be a 1 component array.");
return 1;
}
if(bin_extents->GetNumberOfTuples() != bin_count)
{
vtkGenericWarningMacro("Incorrect number of bins.");
return 1;
}
vtkIntArray* const bin_values = vtkIntArray::SafeDownCast(
histogram->GetRowData()->GetArray((int)1));
if(!bin_values)
{
vtkGenericWarningMacro("cell data missing.");
return 1;
}
if(bin_values->GetNumberOfComponents() != 1)
{
vtkGenericWarningMacro("bin_values must be a 1 component array.")
return 1;
}
if(bin_values->GetNumberOfTuples() != bin_count)
{
vtkGenericWarningMacro("bin_count don;t have enough values.");
return 1;
}
if(bin_values->GetComponent(0, 0) != 14)
{
vtkGenericWarningMacro("incorrect bin value.");
return 1;
}
if(bin_values->GetComponent(1, 0) != 22)
{
vtkGenericWarningMacro("incorrect bin value.");
return 1;
}
if(bin_values->GetComponent(2, 0) != 14)
{
vtkGenericWarningMacro("incorrect bin value.");
return 1;
}
return 0;
}
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