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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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"
#include "itkTestingMacros.h"
int
itkFEMElement2DC0LinearQuadrilateralStrainItpackTest(int argc, char * argv[])
{
if (argc != 3)
{
std::cerr << "Missing parameters." << std::endl;
std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv) << " inputFileName outputFileName" << 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 initialization of the itk::FEMFactoryBase::GetFactory()
itk::FEMFactoryBase::GetFactory()->RegisterDefaultTypes();
using Solver2DType = itk::fem::Solver<2>;
auto solver = Solver2DType::New();
using SpatialObjectType = itk::SpatialObject<2>;
using SpatialObjectPointer = SpatialObjectType::Pointer;
SpatialObjectPointer Spatial = SpatialObjectType::New();
if (Spatial.IsNull())
{
return EXIT_FAILURE;
}
using FEMSpatialObjectReaderType = itk::FEMSpatialObjectReader<2>;
using FEMSpatialObjectReaderPointer = FEMSpatialObjectReaderType::Pointer;
FEMSpatialObjectReaderPointer spatialReader = FEMSpatialObjectReaderType::New();
spatialReader->SetFileName(argv[1]);
spatialReader->Update();
FEMSpatialObjectReaderType::GroupPointer myGroup = spatialReader->GetGroup();
if (!myGroup)
{
std::cout << "No Group : [FAILED]" << std::endl;
return EXIT_FAILURE;
}
std::cout << " [PASSED]" << std::endl;
// Testing the fe mesh validity
using FEMObjectSpatialObjectType = itk::FEMObjectSpatialObject<2>;
FEMObjectSpatialObjectType::ChildrenListType * children = spatialReader->GetGroup()->GetChildren();
itk::fem::LinearSystemWrapperItpack WrapperItpack;
WrapperItpack.SetMaximumNonZeroValuesInMatrix(1000);
if (children->front()->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 (itk::Math::abs(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
auto femSODef = FEMObjectSpatialObjectType::New();
femSODef->SetFEMObject(solver->GetOutput());
using FEMSpatialObjectWriterType = itk::FEMSpatialObjectWriter<2>;
using FEMSpatialObjectWriterPointer = FEMSpatialObjectWriterType::Pointer;
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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