VtkNonlinearElasticitySolutionWriter.cpp

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#include "VtkNonlinearElasticitySolutionWriter.hpp"
#include "VtkMeshWriter.hpp"
 
 
template<unsigned DIM>
VtkNonlinearElasticitySolutionWriter<DIM>::VtkNonlinearElasticitySolutionWriter(AbstractNonlinearElasticitySolver<DIM>& rSolver)
        : mpSolver(&rSolver),
          mWriteElementWiseStrains(false)
{
    assert(mpSolver);
    mDisplacements.resize(mpSolver->mrQuadMesh.GetNumNodes());
    mTensorStrainData.resize(mpSolver->mrQuadMesh.GetNumElements());
}
 
template<unsigned DIM>
void VtkNonlinearElasticitySolutionWriter<DIM>::Write()
{
    if (mpSolver->mOutputDirectory=="")
    {
        EXCEPTION("No output directory was given to the mechanics solver");
    }
 
    VtkMeshWriter<DIM, DIM> mesh_writer(mpSolver->mOutputDirectory + "/vtk", "solution", true);
 
    // write the displacement
    CalculateDisplacements(mDisplacements);
    mesh_writer.AddPointData("Displacement", mDisplacements);
 
    // write pressures
    if (mpSolver->mCompressibilityType==INCOMPRESSIBLE)
    {
        mesh_writer.AddPointData("Pressure", mpSolver->rGetPressures());
    }
 
    // write the element attribute as cell data.
    std::vector<double> element_attribute;
    for (typename QuadraticMesh<DIM>::ElementIterator iter = mpSolver->mrQuadMesh.GetElementIteratorBegin();
        iter != mpSolver->mrQuadMesh.GetElementIteratorEnd();
        ++iter)
    {
        element_attribute.push_back(iter->GetAttribute());
    }
    mesh_writer.AddCellData("Attribute", element_attribute);
 
    // write strains if requested
    if (mWriteElementWiseStrains)
    {
        std::string name;
        CalculateStrains(name,mTensorStrainData);//fill up name and data
        mesh_writer.AddTensorCellData(name, mTensorStrainData);
    }
 
    // final write
    mesh_writer.WriteFilesUsingMesh(mpSolver->mrQuadMesh);
}
 
template<unsigned DIM>
void VtkNonlinearElasticitySolutionWriter<DIM>::CalculateDisplacements(std::vector<c_vector<double,DIM> >& rDisplacements)
{
    assert(rDisplacements.size() == mpSolver->mrQuadMesh.GetNumNodes());
    std::vector<c_vector<double,DIM> > spatial_solution = mpSolver->rGetSpatialSolution();
    for (unsigned i=0; i<mpSolver->mrQuadMesh.GetNumNodes(); i++)
    {
        for (unsigned j=0; j<DIM; j++)
        {
            rDisplacements[i](j) = spatial_solution[i](j) - mpSolver->mrQuadMesh.GetNode(i)->rGetLocation()[j];
        }
    }
}
 
template<unsigned DIM>
void VtkNonlinearElasticitySolutionWriter<DIM>::CalculateStrains(std::string& name, std::vector<c_matrix<double,DIM,DIM> >& rStrains)
{
    assert(rStrains.size() == mpSolver->mrQuadMesh.GetNumElements());
    switch(mElementWiseStrainType)
    {
        case DEFORMATION_GRADIENT_F:
        {
            name = "deformation_gradient_F";
            break;
        }
        case DEFORMATION_TENSOR_C:
        {
            name = "deformation_tensor_C";
            break;
        }
        case LAGRANGE_STRAIN_E:
        {
            name = "Lagrange_strain_E";
            break;
        }
        default:
        {
            NEVER_REACHED;
        }
    }
 
    for (typename AbstractTetrahedralMesh<DIM,DIM>::ElementIterator iter = mpSolver->mrQuadMesh.GetElementIteratorBegin();
            iter != mpSolver->mrQuadMesh.GetElementIteratorEnd();
            ++iter)
    {
        mpSolver->GetElementCentroidStrain(mElementWiseStrainType, *iter, rStrains[iter->GetIndex()]);
    }
}
 
template<unsigned DIM>
void VtkNonlinearElasticitySolutionWriter<DIM>::SetWriteElementWiseStrains(StrainType strainType)
{
    mWriteElementWiseStrains = true;
    mElementWiseStrainType = strainType;
}
 
 
 
// Explicit instantiation
template class VtkNonlinearElasticitySolutionWriter<2>;
template class VtkNonlinearElasticitySolutionWriter<3>;