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/*=========================================================================
Program: Visualization Toolkit
Module: ArrayDiagonalMatrixSource.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 <vtkArrayData.h>
#include <vtkArrayPrint.h>
#include <vtkDenseArray.h>
#include <vtkDiagonalMatrixSource.h>
#include <vtkSmartPointer.h>
#include <vtkSparseArray.h>
#include <vtksys/ios/iostream>
#include <vtksys/stl/stdexcept>
#define test_expression(expression) \
{ \
if(!(expression)) \
throw std::runtime_error("Expression failed: " #expression); \
}
int ArrayDiagonalMatrixSource(int vtkNotUsed(argc), char *vtkNotUsed(argv)[])
{
try
{
vtkSmartPointer<vtkDiagonalMatrixSource> source = vtkSmartPointer<vtkDiagonalMatrixSource>::New();
source->SetExtents(3);
source->SetArrayType(vtkDiagonalMatrixSource::SPARSE);
source->SetDiagonal(1.0);
source->SetSuperDiagonal(0.5);
source->SetSubDiagonal(-0.5);
source->Update();
vtkSparseArray<double>* const sparse_array = vtkSparseArray<double>::SafeDownCast(
source->GetOutput()->GetArray(static_cast<vtkIdType>(0)));
cout << "sparse diagonal matrix:\n";
vtkPrintMatrixFormat(cout, sparse_array);
test_expression(sparse_array);
test_expression(sparse_array->GetValue(vtkArrayCoordinates(0, 0)) == 1.0);
test_expression(sparse_array->GetValue(vtkArrayCoordinates(1, 0)) == -0.5);
test_expression(sparse_array->GetValue(vtkArrayCoordinates(2, 0)) == 0.0);
test_expression(sparse_array->GetValue(vtkArrayCoordinates(0, 1)) == 0.5);
test_expression(sparse_array->GetValue(vtkArrayCoordinates(1, 1)) == 1.0);
test_expression(sparse_array->GetValue(vtkArrayCoordinates(2, 1)) == -0.5);
test_expression(sparse_array->GetValue(vtkArrayCoordinates(0, 2)) == 0.0);
test_expression(sparse_array->GetValue(vtkArrayCoordinates(1, 2)) == 0.5);
test_expression(sparse_array->GetValue(vtkArrayCoordinates(2, 2)) == 1.0);
source->SetArrayType(vtkDiagonalMatrixSource::DENSE);
source->Update();
vtkDenseArray<double>* const dense_array = vtkDenseArray<double>::SafeDownCast(
source->GetOutput()->GetArray(static_cast<vtkIdType>(0)));
cout << "dense diagonal matrix:\n";
vtkPrintMatrixFormat(cout, dense_array);
test_expression(dense_array);
test_expression(dense_array->GetValue(vtkArrayCoordinates(0, 0)) == 1.0);
test_expression(dense_array->GetValue(vtkArrayCoordinates(1, 0)) == -0.5);
test_expression(dense_array->GetValue(vtkArrayCoordinates(2, 0)) == 0.0);
test_expression(dense_array->GetValue(vtkArrayCoordinates(0, 1)) == 0.5);
test_expression(dense_array->GetValue(vtkArrayCoordinates(1, 1)) == 1.0);
test_expression(dense_array->GetValue(vtkArrayCoordinates(2, 1)) == -0.5);
test_expression(dense_array->GetValue(vtkArrayCoordinates(0, 2)) == 0.0);
test_expression(dense_array->GetValue(vtkArrayCoordinates(1, 2)) == 0.5);
test_expression(dense_array->GetValue(vtkArrayCoordinates(2, 2)) == 1.0);
return 0;
}
catch(std::exception& e)
{
cerr << e.what() << endl;
return 1;
}
}
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