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// -*- c++ -*-
/*=========================================================================
Program: Visualization Toolkit
Module: vtkTableFFT.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 2009 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
#include "vtkTableFFT.h"
#include "vtkDataArray.h"
#include "vtkImageData.h"
#include "vtkImageFFT.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
#include "vtkTable.h"
#include "vtkSmartPointer.h"
#define VTK_CREATE(type, name) \
vtkSmartPointer<type> name = vtkSmartPointer<type>::New()
#include <string.h>
#include <vtksys/SystemTools.hxx>
using namespace vtksys;
//=============================================================================
vtkStandardNewMacro(vtkTableFFT);
//-----------------------------------------------------------------------------
vtkTableFFT::vtkTableFFT()
{
}
vtkTableFFT::~vtkTableFFT()
{
}
void vtkTableFFT::PrintSelf(ostream &os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//-----------------------------------------------------------------------------
int vtkTableFFT::RequestData(vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
vtkTable *input = vtkTable::GetData(inputVector[0]);
vtkTable *output = vtkTable::GetData(outputVector);
if (!input || !output)
{
vtkWarningMacro(<< "No input or output.");
return 0;
}
vtkIdType numColumns = input->GetNumberOfColumns();
for (vtkIdType col = 0; col < numColumns; col++)
{
this->UpdateProgress((double)col/numColumns);
vtkDataArray *array = vtkDataArray::SafeDownCast(input->GetColumn(col));
if (!array) continue;
if (array->GetNumberOfComponents() != 1) continue;
if (array->GetName())
{
if (SystemTools::Strucmp(array->GetName(),"time") == 0) continue;
if (strcmp(array->GetName(), "vtkValidPointMask") == 0)
{
output->AddColumn(array);
continue;
}
}
if (array->IsA("vtkIdTypeArray")) continue;
vtkSmartPointer<vtkDataArray> frequencies = this->DoFFT(array);
frequencies->SetName(array->GetName());
output->AddColumn(frequencies);
}
return 1;
}
//-----------------------------------------------------------------------------
vtkSmartPointer<vtkDataArray> vtkTableFFT::DoFFT(vtkDataArray *input)
{
// Build an image data containing the input data.
VTK_CREATE(vtkImageData, imgInput);
imgInput->SetDimensions(input->GetNumberOfTuples(), 1, 1);
imgInput->SetScalarType(input->GetDataType(), input->GetInformation());
imgInput->GetPointData()->SetScalars(input);
// Compute the FFT
VTK_CREATE(vtkImageFFT, fft);
fft->SetInputData(imgInput);
fft->Update();
// Return the result
return vtkSmartPointer<vtkDataArray>(fft->GetOutput()->GetPointData()->GetScalars());
}
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