Nektar::Utilities::ProcessJac Class Reference

This processing module calculates the Jacobian of elements using SpatialDomains::GeomFactors and the Element::GetGeom method. For now it simply prints a list of elements which have negative Jacobian. More...

#include <ProcessJac.h>

Inheritance diagram for Nektar::Utilities::ProcessJac:

Collaboration diagram for Nektar::Utilities::ProcessJac:

Public Member Functions
	ProcessJac (MeshSharedPtr m)
virtual	~ProcessJac ()
virtual void	Process ()
	Write mesh to output file. More...
Public Member Functions inherited from Nektar::Utilities::ProcessModule
	ProcessModule ()
	ProcessModule (FieldSharedPtr p_f)
	ProcessModule (MeshSharedPtr p_m)
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...

Static Public Member Functions
static boost::shared_ptr< Module >	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::Module
	Module ()
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...
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::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

This processing module calculates the Jacobian of elements using SpatialDomains::GeomFactors and the Element::GetGeom method. For now it simply prints a list of elements which have negative Jacobian.

Definition at line 51 of file ProcessJac.h.

Constructor & Destructor Documentation

Nektar::Utilities::ProcessJac::ProcessJac

(

MeshSharedPtr

m

)

Definition at line 54 of file ProcessJac.cpp.

References Nektar::Utilities::Module::m_config.

                                              : ProcessModule(m)
        {
            m_config["extract"] = ConfigOption(
                true, "0", "Extract non-valid elements from mesh.");
            m_config["removecurveifsingular"] = ConfigOption(
                true, "0", "remove curve nodes if element is singular.");
            m_config["list"]    = ConfigOption(
                true, "0", "Print list of elements having negative Jacobian.");
        }

Nektar::Utilities::ProcessJac::~ProcessJac ( )

virtual

Definition at line 64 of file ProcessJac.cpp.

        {

        }

Member Function Documentation

static boost::shared_ptr<Module> Nektar::Utilities::ProcessJac::create ( MeshSharedPtr  m )

inlinestatic

Creates an instance of this class.

Definition at line 55 of file ProcessJac.h.

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

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

void Nektar::Utilities::ProcessJac::Process ( )

virtual

Write mesh to output file.

Implements Nektar::Utilities::Module.

Definition at line 69 of file ProcessJac.cpp.

References Nektar::StdRegions::ElementTypeMap, Nektar::iterator, Nektar::Utilities::Module::m_config, Nektar::Utilities::Module::m_mesh, 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 << "ProcessJac: Calculating Jacobians... " << endl;
            }

            bool extract = m_config["extract"].as<bool>();
            bool printList = m_config["list"].as<bool>();
            bool RemoveCurveIfSingular = m_config["removecurveifsingular"].as<bool>();
            vector<ElementSharedPtr> el = m_mesh->m_element[m_mesh->m_expDim];

            if (extract)
            {
                m_mesh->m_element[m_mesh->m_expDim].clear();
            }

            if (printList)
            {
                cout << "Elements with negative Jacobian:" << endl;
            }

            int nNeg = 0;

            // Iterate over list of elements of expansion dimension.
            for (int i = 0; i < el.size(); ++i)
            {
                // Create elemental geometry.
                SpatialDomains::GeometrySharedPtr geom =
                    el[i]->GetGeom(m_mesh->m_spaceDim);

                // Generate geometric factors.
                SpatialDomains::GeomFactorsSharedPtr gfac =
                    geom->GetGeomFactors();

                // Get the Jacobian and, if it is negative, print a warning
                // message.
                if (!gfac->IsValid())
                {
                    nNeg++;

                    if (printList)
                    {
                        cout << "  - " << el[i]->GetId() << " ("
                             << StdRegions::ElementTypeMap[el[i]->GetConf().m_e]
                             << ")" << endl;
                    }

                    if(RemoveCurveIfSingular)
                    {
                        int nSurf = el[i]->GetFaceCount(); 
                        if(nSurf == 5) // prism mesh 
                        {
                            // find edges ndoes and blend to far side.
                            for(int e = 0; e < el[i]->GetEdgeCount(); ++e)
                            {
                                EdgeSharedPtr ed = el[i]->GetEdge(e);
                                EdgeSet::iterator it; 
                                // find edge in m_edgeSet; 
                                if((it = m_mesh->m_edgeSet.find(ed)) != m_mesh->m_edgeSet.end())
                                {
                                    if((*it)->m_edgeNodes.size())
                                    {
                                        vector<NodeSharedPtr> zeroNodes;
                                        (*it)->m_edgeNodes = zeroNodes;
                                    }
                                }
                            }
                        }
                    }

                    if (extract)
                    {
                        m_mesh->m_element[m_mesh->m_expDim].push_back(el[i]);
                    }
                }
            }

            if (extract)
            {
                m_mesh->m_element[m_mesh->m_expDim-1].clear();
                ProcessVertices();
                ProcessEdges();
                ProcessFaces();
                ProcessElements();
                ProcessComposites();
            }

            if (printList || m_mesh->m_verbose)
            {
                cout << "Total negative Jacobians: " << nNeg << endl;
            }
            else if (nNeg > 0)
            {
                cout << "WARNING: Detected " << nNeg << " element"
                     << (nNeg == 1 ? "" : "s") << " with negative Jacobian."
                     << endl;
            }
        }

Member Data Documentation

ModuleKey Nektar::Utilities::ProcessJac::className

static

Initial value:

=
            GetModuleFactory().RegisterCreatorFunction(
                ModuleKey(eProcessModule, "jac"), ProcessJac::create,
                "Process elements based on values of Jacobian.")

Definition at line 58 of file ProcessJac.h.