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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "itkFEMSolver.h"
#include "itkFEMSpatialObjectReader.h"
#include "itkFEMSpatialObjectWriter.h"
#include "itkFEMLinearSystemWrapperItpack.h"
int itkFEMElement2DC0LinearQuadrilateralStrainItpackTest(int argc, char *argv[])
{
if(argc < 1)
{
std::cerr << "Missing Spatial Object Filename" << std::endl;
return EXIT_FAILURE;
}
//Need to register default FEM object types,
//and setup SpatialReader to recognize FEM types
//which is all currently done as a HACK in
//the initializaiton of the itk::FEMFactoryBase::GetFactory()
itk::FEMFactoryBase::GetFactory()->RegisterDefaultTypes();
typedef itk::fem::Solver<2> Solver2DType;
Solver2DType::Pointer solver = Solver2DType::New();
typedef itk::SpatialObject<2> SpatialObjectType;
typedef SpatialObjectType::Pointer SpatialObjectPointer;
SpatialObjectPointer Spatial = SpatialObjectType::New();
if(Spatial.IsNull())
{
return EXIT_FAILURE;
}
typedef itk::FEMSpatialObjectReader<2> FEMSpatialObjectReaderType;
typedef FEMSpatialObjectReaderType::Pointer FEMSpatialObjectReaderPointer;
FEMSpatialObjectReaderPointer SpatialReader = FEMSpatialObjectReaderType::New();
SpatialReader->SetFileName( argv[1] );
SpatialReader->Update();
FEMSpatialObjectReaderType::ScenePointer myScene = SpatialReader->GetScene();
if( !myScene )
{
std::cout << "No Scene : [FAILED]" << std::endl;
return EXIT_FAILURE;
}
std::cout << " [PASSED]" << std::endl;
// Testing the fe mesh validity
typedef itk::FEMObjectSpatialObject<2> FEMObjectSpatialObjectType;
FEMObjectSpatialObjectType::ChildrenListType* children = SpatialReader->GetGroup()->GetChildren();
itk::fem::LinearSystemWrapperItpack WrapperItpack;
WrapperItpack.SetMaximumNonZeroValuesInMatrix(1000);
if( strcmp( (*(children->begin() ) )->GetTypeName(), "FEMObjectSpatialObject") )
{
std::cout << " [FAILED]" << std::endl;
return EXIT_FAILURE;
}
FEMObjectSpatialObjectType::Pointer femSO =
dynamic_cast<FEMObjectSpatialObjectType *>( (*(children->begin() ) ).GetPointer() );
if (!femSO)
{
std::cout << " dynamic_cast [FAILED]" << std::endl;
return EXIT_FAILURE;
}
delete children;
femSO->GetFEMObject()->FinalizeMesh();
solver->SetInput( femSO->GetFEMObject() );
solver->SetLinearSystemWrapper(&WrapperItpack);
solver->Update();
int numDOF = femSO->GetFEMObject()->GetNumberOfDegreesOfFreedom();
vnl_vector<float> soln(numDOF);
float expectedResult[8] = {0.0f, 0.0f, 4.11808e-07f, 3.47237e-08f, 5.54107e-07f, -1.65448e-07f, 0.0f, 0.0f};
bool foundError = false;
for( int i = 0; i < numDOF; i++ )
{
soln[i] = solver->GetSolution(i);
// std::cout << "Solution[" << i << "]:" << soln[i] << std::endl;
if( std::fabs(expectedResult[i] - soln[i]) > 1e-9 )
{
std::cout << "ERROR: Index " << i << ". Expected " << expectedResult[i] << " Solution " << soln[i] << std::endl;
foundError = true;
}
}
if( foundError )
{
std::cout << "Test FAILED!" << std::endl;
return EXIT_FAILURE;
}
// to write the deformed mesh
FEMObjectSpatialObjectType::Pointer femSODef = FEMObjectSpatialObjectType::New();
femSODef->SetFEMObject(solver->GetOutput() );
typedef itk::FEMSpatialObjectWriter<2> FEMSpatialObjectWriterType;
typedef FEMSpatialObjectWriterType::Pointer FEMSpatialObjectWriterPointer;
FEMSpatialObjectWriterPointer SpatialWriter = FEMSpatialObjectWriterType::New();
SpatialWriter->SetInput(femSODef);
SpatialWriter->SetFileName( argv[2] );
SpatialWriter->Update();
std::cout << "Test PASSED!" << std::endl;
return EXIT_SUCCESS;
}
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