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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 "itkFEMGenerateMesh.h"
#include "itkFEMElement2DC0LinearQuadrilateralStrain.h"
#include "itkFEMMaterialLinearElasticity.h"
#include "itkFEMElement3DC0LinearHexahedronStrain.h"
//
int
itkFEMGenerateMeshTest(int, char *[])
{
// 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();
//
// Generate2DRectilinearMesh(m_Element,mySolver,MeshOriginV,MeshSizeV,ElementsPerDim);
//
// Generate3DRectilinearMesh(m_Element,mySolver,MeshOriginV,MeshSizeV,ElementsPerDim);
// Set up the solver object
itk::fem::Solver S;
itk::fem::LinearSystemWrapperVNL lsw;
S.SetLinearSystemWrapper(&lsw);
// Set up mesh dimensions
vnl_vector<double> MeshOriginV;
vnl_vector<double> MeshSizeV;
vnl_vector<double> ElementsPerDim;
MeshOriginV.set_size(2);
MeshSizeV.set_size(2);
ElementsPerDim.set_size(2);
for (unsigned int j = 0; j < 2; ++j)
{
MeshOriginV[j] = 0.0;
MeshSizeV[j] = 10;
ElementsPerDim[j] = 5.0;
}
using ElasticityType = itk::fem::MaterialLinearElasticity;
// Create the material
auto m = ElasticityType::New();
m->SetGlobalNumber(0);
m->SetYoungsModulus(1000.);
m->SetCrossSectionalArea(1.0);
m->SetThickness(1.0);
m->SetMomentOfInertia(1.0);
m->SetPoissonsRatio(0.4);
m->SetDensityHeatProduct(1.0);
// Create the element type
using StrainType = itk::fem::Element2DC0LinearQuadrilateralStrain;
auto e1 = StrainType::New();
e1->SetMaterial(dynamic_cast<ElasticityType *>(m));
try
{
itk::fem::Generate2DRectilinearMesh(e1, S, MeshOriginV, MeshSizeV, ElementsPerDim);
std::cout << "Generated 2D rectilinear mesh" << std::endl;
}
catch (const itk::ExceptionObject &)
{
std::cerr << "Could not generate 2D mesh - test FAILED" << std::endl;
return EXIT_FAILURE;
}
MeshOriginV.set_size(3);
MeshSizeV.set_size(3);
ElementsPerDim.set_size(3);
for (unsigned int j = 0; j < 3; ++j)
{
MeshOriginV[j] = 0.;
MeshSizeV[j] = 10;
ElementsPerDim[j] = 5.;
}
itk::fem::Element3DC0LinearHexahedronStrain::Pointer e2 = itk::fem::Element3DC0LinearHexahedronStrain::New();
if (dynamic_cast<itk::fem::MaterialLinearElasticity *>(m))
{
e2->SetMaterial(dynamic_cast<itk::fem::MaterialLinearElasticity *>(m));
}
try
{
itk::fem::Generate3DRectilinearMesh(e2, S, MeshOriginV, MeshSizeV, ElementsPerDim);
std::cout << "Generated 3D rectilinear mesh" << std::endl;
}
catch (const itk::ExceptionObject &)
{
std::cerr << "Could not create 3D mesh - test FAILED" << std::endl;
return EXIT_FAILURE;
}
delete e1;
delete m;
delete e2;
std::cout << "Test PASSED!" << std::endl;
return EXIT_SUCCESS;
}
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