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vtkArrayNorm.cxx
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vtkArrayNorm.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkArrayNorm.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 "vtkCommand.h"
#include "vtkDenseArray.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkSmartPointer.h"
#include "vtkArrayNorm.h"
#include <vtksys/ios/sstream>
#include <limits>
#include <stdexcept>
///////////////////////////////////////////////////////////////////////////////
// vtkArrayNorm
vtkStandardNewMacro(vtkArrayNorm);
vtkArrayNorm::vtkArrayNorm() :
Dimension(0),
L(2),
Invert(false),
Window(0, std::numeric_limits<vtkIdType>::max())
{
}
vtkArrayNorm::~vtkArrayNorm()
{
}
void vtkArrayNorm::SetWindow(const vtkArrayRange& window)
{
if(window == this->Window)
return;
this->Window = window;
this->Modified();
}
vtkArrayRange vtkArrayNorm::GetWindow()
{
return this->Window;
}
void vtkArrayNorm::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Dimension: " << this->Dimension << endl;
os << indent << "L: " << this->L << endl;
os << indent << "Invert: " << this->Invert << endl;
os << indent << "Window: " << this->Window << endl;
}
void vtkArrayNorm::SetL(int value)
{
if(value < 1)
{
vtkErrorMacro(<< "Cannot compute array norm for L < 1");
return;
}
if(this->L == value)
return;
this->L = value;
this->Modified();
}
int vtkArrayNorm::RequestData(
vtkInformation*,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
try
{
// Test our preconditions ...
vtkArrayData* const input_data = vtkArrayData::GetData(inputVector[0]);
if(!input_data)
throw std::runtime_error("Missing vtkArrayData on input port 0.");
if(input_data->GetNumberOfArrays() != 1)
throw std::runtime_error("vtkArrayData on input port 0 must contain exactly one vtkArray.");
vtkTypedArray<double>* const input_array = vtkTypedArray<double>::SafeDownCast(
input_data->GetArray(static_cast<vtkIdType>(0)));
if(!input_array)
throw std::runtime_error("vtkArray on input port 0 must be a vtkTypedArray<double>.");
if(input_array->GetDimensions() != 2)
throw std::runtime_error("vtkArray on input port 0 must be a matrix.");
const vtkIdType vector_dimension = this->Dimension;
if(vector_dimension < 0 || vector_dimension > 1)
throw std::runtime_error("Dimension must be zero or one.");
const vtkIdType element_dimension = 1 - vector_dimension;
// Setup our output ...
std::ostringstream array_name;
array_name << "L" << this->L << "_norm";
vtkDenseArray<double>* const output_array = vtkDenseArray<double>::New();
output_array->SetName(array_name.str());
output_array->Resize(input_array->GetExtent(vector_dimension));
output_array->Fill(0.0);
vtkArrayData* const output = vtkArrayData::GetData(outputVector);
output->ClearArrays();
output->AddArray(output_array);
output_array->Delete();
// Make it happen ...
vtkArrayCoordinates coordinates;
const vtkIdType non_null_count = input_array->GetNonNullSize();
for(vtkIdType n = 0; n != non_null_count; ++n)
{
input_array->GetCoordinatesN(n, coordinates);
if(!this->Window.Contains(coordinates[element_dimension]))
continue;
output_array->SetValue(coordinates[vector_dimension], output_array->GetValue(coordinates[vector_dimension]) + pow(input_array->GetValueN(n), this->L));
}
for(vtkArray::SizeT n = 0; n != output_array->GetNonNullSize(); ++n)
{
output_array->SetValueN(n, pow(output_array->GetValueN(n), 1.0 / this->L));
}
// Optionally invert the output vector
if(this->Invert)
{
for(vtkArray::SizeT n = 0; n != output_array->GetNonNullSize(); ++n)
{
if(output_array->GetValueN(n))
output_array->SetValueN(n, 1.0 / output_array->GetValueN(n));
}
}
}
catch(std::exception& e)
{
vtkErrorMacro(<< "unhandled exception: " << e.what());
return 0;
}
catch(...)
{
vtkErrorMacro(<< "unknown exception");
return 0;
}
return 1;
}