Nektar::Utilities::InputVtk Class Reference

Converter for VTK files. More...

#include <InputVtk.h>

Inheritance diagram for Nektar::Utilities::InputVtk:

Collaboration diagram for Nektar::Utilities::InputVtk:

Public Member Functions
	InputVtk (MeshSharedPtr m)
virtual	~InputVtk ()
virtual void	Process ()
	Populate and validate required data structures. More...
Public Member Functions inherited from Nektar::Utilities::InputModule
	InputModule (FieldSharedPtr p_m)
void	AddFile (string fileType, string fileName)
	InputModule (MeshSharedPtr p_m)
void	OpenStream ()
	Open a file for input. More...
Public Member Functions inherited from Nektar::Utilities::Module
	Module (FieldSharedPtr p_f)
virtual void	Process (po::variables_map &vm)=0
void	RegisterConfig (string key, string value)
	Register a configuration option with a module. More...
void	PrintConfig ()
	Print out all configuration options for a module. More...
void	SetDefaults ()
	Sets default configuration options for those which have not been set. More...
bool	GetRequireEquiSpaced (void)
void	SetRequireEquiSpaced (bool pVal)
void	EvaluateTriFieldAtEquiSpacedPts (LocalRegions::ExpansionSharedPtr &exp, const Array< OneD, const NekDouble > &infield, Array< OneD, NekDouble > &outfield)
	Module (MeshSharedPtr p_m)
void	RegisterConfig (string key, string value)
void	PrintConfig ()
void	SetDefaults ()
MeshSharedPtr	GetMesh ()
virtual void	ProcessVertices ()
	Extract element vertices. More...
virtual void	ProcessEdges (bool ReprocessEdges=true)
	Extract element edges. More...
virtual void	ProcessFaces (bool ReprocessFaces=true)
	Extract element faces. More...
virtual void	ProcessElements ()
	Generate element IDs. More...
virtual void	ProcessComposites ()
	Generate composites. More...
virtual void	ClearElementLinks ()

Static Public Member Functions
static ModuleSharedPtr	create (MeshSharedPtr m)
	Creates an instance of this class. More...

Static Public Attributes
static ModuleKey	className

Additional Inherited Members
Protected Member Functions inherited from Nektar::Utilities::InputModule
void	PrintSummary ()
	Print summary of elements. More...
void	PrintSummary ()
	Print summary of elements. More...
Protected Member Functions inherited from Nektar::Utilities::Module
	Module ()
void	ReorderPrisms (PerMap &perFaces)
	Reorder node IDs so that prisms and tetrahedra are aligned correctly. More...
void	PrismLines (int prism, PerMap &perFaces, set< int > &prismsDone, vector< ElementSharedPtr > &line)
Protected Attributes inherited from Nektar::Utilities::InputModule
set< string >	m_allowedFiles
std::ifstream	m_mshFile
	Input stream. More...
Protected Attributes inherited from Nektar::Utilities::Module
FieldSharedPtr	m_f
	Field object. More...
map< string, ConfigOption >	m_config
	List of configuration values. More...
bool	m_requireEquiSpaced
MeshSharedPtr	m_mesh
	Mesh object. More...

Detailed Description

Converter for VTK files.

Definition at line 47 of file InputVtk.h.

Constructor & Destructor Documentation

Nektar::Utilities::InputVtk::InputVtk

(

MeshSharedPtr

m

)

Definition at line 56 of file InputVtk.cpp.

                                  : InputModule(m)
{
}

Nektar::Utilities::InputVtk::~InputVtk ( )

virtual

Definition at line 60 of file InputVtk.cpp.

{
}

Member Function Documentation

static ModuleSharedPtr Nektar::Utilities::InputVtk::create ( MeshSharedPtr  m )

inlinestatic

Creates an instance of this class.

Definition at line 51 of file InputVtk.h.

References Nektar::MemoryManager< DataType >::AllocateSharedPtr().

    {
        return MemoryManager<InputVtk>::AllocateSharedPtr(m);
    }

void Nektar::Utilities::InputVtk::Process ( )

virtual

Populate and validate required data structures.

Gmsh file contains a list of nodes and their coordinates, along with a list of elements and those nodes which define them. We read in and store the list of nodes in #m_node and store the list of elements in #m_element. Each new element is supplied with a list of entries from #m_node which defines the element. Finally some mesh statistics are printed.

Parameters

pFilename

Filename of Gmsh file to read.

Implements Nektar::Utilities::Module.

Definition at line 74 of file InputVtk.cpp.

References Nektar::LibUtilities::NekFactory< tKey, tBase, >::CreateInstance(), Nektar::LibUtilities::eSegment, Nektar::LibUtilities::eTriangle, Nektar::NekMeshUtils::GetElementFactory(), Nektar::Utilities::Module::m_config, Nektar::Utilities::Module::m_mesh, npts, Nektar::Utilities::Module::ProcessComposites(), Nektar::Utilities::Module::ProcessEdges(), Nektar::Utilities::Module::ProcessElements(), Nektar::Utilities::Module::ProcessFaces(), and Nektar::Utilities::Module::ProcessVertices().

{
    if (m_mesh->m_verbose)
    {
        cout << "InputVtk: Start reading file..." << endl;
    }

    vtkPolyDataReader *vtkMeshReader = vtkPolyDataReader::New();
    vtkMeshReader->SetFileName(m_config["infile"].as<string>().c_str());
    vtkMeshReader->Update();
    vtkPolyData *vtkMesh = vtkMeshReader->GetOutput();

    vtkPoints *vtkPoints = vtkMesh->GetPoints();

    const int numCellTypes = 3;
    vtkCellArray *vtkCells[numCellTypes];
    LibUtilities::ShapeType vtkCellTypes[numCellTypes];
    int vtkNumPoints[numCellTypes];
    vtkCells[0]     = vtkMesh->GetPolys();
    vtkCells[1]     = vtkMesh->GetStrips();
    vtkCells[2]     = vtkMesh->GetLines();
    vtkCellTypes[0] = LibUtilities::eTriangle;
    vtkCellTypes[1] = LibUtilities::eTriangle;
    vtkCellTypes[2] = LibUtilities::eSegment;
    vtkNumPoints[0] = 3;
    vtkNumPoints[1] = 3;
    vtkNumPoints[2] = 2;

    vtkIdType npts;
    vtkIdType *pts = 0;
    double p[3];

    for (int i = 0; i < vtkPoints->GetNumberOfPoints(); ++i)
    {
        vtkPoints->GetPoint(i, p);

        if ((p[0] * p[0]) > 0.000001 && m_mesh->m_spaceDim < 1)
        {
            m_mesh->m_spaceDim = 1;
        }
        if ((p[1] * p[1]) > 0.000001 && m_mesh->m_spaceDim < 2)
        {
            m_mesh->m_spaceDim = 2;
        }
        if ((p[2] * p[2]) > 0.000001 && m_mesh->m_spaceDim < 3)
        {
            m_mesh->m_spaceDim = 3;
        }

        m_mesh->m_node.push_back(
            boost::shared_ptr<Node>(new Node(i, p[0], p[1], p[2])));
    }

    for (int c = 0; c < numCellTypes; ++c)
    {
        vtkCells[c]->InitTraversal();
        for (int i = 0; vtkCells[c]->GetNextCell(npts, pts); ++i)
        {
            for (int j = 0; j < npts - vtkNumPoints[c] + 1; ++j)
            {
                // Create element tags
                vector<int> tags;
                tags.push_back(0);               // composite
                tags.push_back(vtkCellTypes[c]); // element type

                // Read element node list
                vector<NodeSharedPtr> nodeList;
                for (int k = j; k < j + vtkNumPoints[c]; ++k)
                {
                    nodeList.push_back(m_mesh->m_node[pts[k]]);
                }

                // Create element
                ElmtConfig conf(vtkCellTypes[c], 1, false, false);
                ElementSharedPtr E = GetElementFactory().CreateInstance(
                    vtkCellTypes[c], conf, nodeList, tags);

                // Determine mesh expansion dimension
                if (E->GetDim() > m_mesh->m_expDim)
                {
                    m_mesh->m_expDim = E->GetDim();
                }
                m_mesh->m_element[E->GetDim()].push_back(E);
            }
        }
    }

    ProcessVertices();
    ProcessEdges();
    ProcessFaces();
    ProcessElements();
    ProcessComposites();
}

Member Data Documentation

ModuleKey Nektar::Utilities::InputVtk::className

static

Initial value:

= GetModuleFactory().RegisterCreatorFunction(
    ModuleKey(eInputModule, "vtk"), InputVtk::create, "Reads VTK format.")

Definition at line 55 of file InputVtk.h.