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vtkBoostLogWeighting.cxx
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vtkBoostLogWeighting.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkBoostLogWeighting.cxx
-------------------------------------------------------------------------
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.
-------------------------------------------------------------------------
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 "vtkArrayCoordinates.h"
#include "vtkCommand.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkBoostLogWeighting.h"
#include "vtkObjectFactory.h"
#include "vtkSmartPointer.h"
#include "vtkTypedArray.h"
#include <boost/math/special_functions/log1p.hpp>
#include <boost/version.hpp>
#if BOOST_VERSION < 103400
#error "vtkBoostLogWeighting requires Boost 1.34.0 or later"
#endif
#include <math.h>
#include <stdexcept>
///////////////////////////////////////////////////////////////////////////////
// vtkBoostLogWeighting
vtkStandardNewMacro(vtkBoostLogWeighting);
vtkBoostLogWeighting::vtkBoostLogWeighting() :
Base(BASE_E),
EmitProgress(true)
{
}
vtkBoostLogWeighting::~vtkBoostLogWeighting()
{
}
void vtkBoostLogWeighting::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Base: " << this->Base << endl;
os << indent << "EmitProgress: "
<< (this->EmitProgress ? "on" : "off") << endl;
}
int vtkBoostLogWeighting::RequestData(
vtkInformation*,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
try
{
vtkArrayData* const input_data = vtkArrayData::GetData(inputVector[0]);
if(!input_data)
throw std::runtime_error("Missing input vtkArrayData on port 0.");
if(input_data->GetNumberOfArrays() != 1)
throw std::runtime_error("Input vtkArrayData must contain exactly one array.");
vtkTypedArray<double>* const input_array = vtkTypedArray<double>::SafeDownCast(input_data->GetArray(0));
if(!input_array)
throw std::runtime_error("Unsupported input array type.");
vtkTypedArray<double>* const output_array = vtkTypedArray<double>::SafeDownCast(input_array->DeepCopy());
vtkArrayData* const output = vtkArrayData::GetData(outputVector);
output->ClearArrays();
output->AddArray(output_array);
output_array->Delete();
const vtkIdType value_count = input_array->GetNonNullSize();
switch(this->Base)
{
case BASE_E:
{
if(this->EmitProgress)
{
for(vtkIdType i = 0; i != value_count; ++i)
{
output_array->SetValueN(i, boost::math::log1p(output_array->GetValueN(i)));
double progress = static_cast<double>(i) / static_cast<double>(value_count);
this->InvokeEvent(vtkCommand::ProgressEvent, &progress);
}
}
else
{
for(vtkIdType i = 0; i != value_count; ++i)
{
output_array->SetValueN(i, boost::math::log1p(output_array->GetValueN(i)));
}
}
break;
}
case BASE_2:
{
const double ln2 = log(2.0);
if(this->EmitProgress)
{
for(vtkIdType i = 0; i != value_count; ++i)
{
output_array->SetValueN(i, 1.0 + log(output_array->GetValueN(i)) / ln2);
double progress = static_cast<double>(i) / static_cast<double>(value_count);
this->InvokeEvent(vtkCommand::ProgressEvent, &progress);
}
}
else
{
for(vtkIdType i = 0; i != value_count; ++i)
{
output_array->SetValueN(i, 1.0 + log(output_array->GetValueN(i)) / ln2);
}
}
break;
}
default:
throw std::runtime_error("Unknown Base type.");
}
}
catch(std::exception& e)
{
vtkErrorMacro(<< "unhandled exception: " << e.what());
return 0;
}
catch(...)
{
vtkErrorMacro(<< "unknown exception");
return 0;
}
return 1;
}