SALOME documentation central

Mesh Class Reference

This class allows defining and managing a mesh. More...

Public Member Functions

def __init__
 Constructor.
def SetMesh
 Initializes the Mesh object from an instance of SMESH_Mesh interface.
def GetMesh
 Returns the mesh, that is an instance of SMESH_Mesh interface.
def GetName
 Gets the name of the mesh.
def SetName
 Sets a name to the mesh.
def GetSubMesh
 Gets the subMesh object associated to a theSubObject geometrical object.
def GetShape
 Returns the shape associated to the mesh.
def SetShape
 Associates the given shape to the mesh (entails the recreation of the mesh).
def IsReadyToCompute
 Returns true if the hypotheses are defined well.
def GetAlgoState
 Returns errors of hypotheses definition.
def GetGeometryByMeshElement
 Returns a geometrical object on which the given element was built.
def MeshDimension
 Returns the mesh dimension depending on the dimension of the underlying shape.
def Segment
 Creates a segment discretization 1D algorithm.
def UseExistingSegments
 Enables creation of nodes and segments usable by 2D algoritms.
def UseExistingFaces
 Enables creation of nodes and faces usable by 3D algoritms.
def Triangle
 Creates a triangle 2D algorithm for faces.
def Quadrangle
 Creates a quadrangle 2D algorithm for faces.
def Tetrahedron
 Creates a tetrahedron 3D algorithm for solids.
def Hexahedron
 Creates a hexahedron 3D algorithm for solids.
def Netgen
 Deprecated, used only for compatibility!
def Projection1D
 Creates a projection 1D algorithm for edges.
def Projection2D
 Creates a projection 2D algorithm for faces.
def Projection3D
 Creates a projection 3D algorithm for solids.
def Prism
 Creates a 3D extrusion (Prism 3D) or RadialPrism 3D algorithm for solids.
def Evaluate
 Evaluates size of prospective mesh on a shape.
def Compute
 Computes the mesh and returns the status of the computation.
def Clear
 Removes all nodes and elements.
def ClearSubMesh
 Removes all nodes and elements of indicated shape.
def AutomaticTetrahedralization
 Computes a tetrahedral mesh using AutomaticLength + MEFISTO + NETGEN.
def AutomaticHexahedralization
 Computes an hexahedral mesh using AutomaticLength + Quadrangle + Hexahedron.
def AddHypothesis
 Assigns a hypothesis.
def RemoveHypothesis
 Unassigns a hypothesis.
def GetHypothesisList
 Gets the list of hypotheses added on a geometry.
def RemoveGlobalHypotheses
 Removes all global hypotheses.
def Group
 Creates a mesh group based on the geometric object grp and gives a name,
if this parameter is not defined the name is the same as the geometric group name
Note: Works like GroupOnGeom().
def ExportToMED
 Deprecated, used only for compatibility! Please, use ExportMED() method instead.
def ExportMED
 Exports the mesh in a file in MED format.
def ExportDAT
 Exports the mesh in a file in DAT format.
def ExportUNV
 Exports the mesh in a file in UNV format.
def ExportSTL
 Export the mesh in a file in STL format.
def CreateEmptyGroup
 Creates an empty mesh group.
def GroupOnGeom
 Creates a mesh group based on the geometrical object grp and gives a name,
if this parameter is not defined the name is the same as the geometrical group name.
def MakeGroupByIds
 Creates a mesh group by the given ids of elements.
def MakeGroup
 Creates a mesh group by the given conditions.
def MakeGroupByCriterion
 Creates a mesh group by the given criterion.
def MakeGroupByCriteria
 Creates a mesh group by the given criteria (list of criteria).
def MakeGroupByFilter
 Creates a mesh group by the given filter.
def GetIdsFromFilter
 Passes mesh elements through the given filter and return IDs of fitting elements.
def GetFreeBorders
 Verifies whether a 2D mesh element has free edges (edges connected to one face only)
Returns a list of special structures (borders).
def RemoveGroup
 Removes a group.
def RemoveGroupWithContents
 Removes a group with its contents.
def GetGroups
 Gets the list of groups existing in the mesh.
def NbGroups
 Gets the number of groups existing in the mesh.
def GetGroupNames
 Gets the list of names of groups existing in the mesh.
def UnionGroups
 Produces a union of two groups A new group is created.
def UnionListOfGroups
 Produces a union list of groups New group is created.
def IntersectGroups
 Prodices an intersection of two groups A new group is created.
def IntersectListOfGroups
 Produces an intersection of groups New group is created.
def CutGroups
 Produces a cut of two groups A new group is created.
def CutListOfGroups
 Produces a cut of groups A new group is created.
def CreateDimGroup
 Produces a group of elements with specified element type using list of existing groups A new group is created.
def ConvertToStandalone
 Convert group on geom into standalone group.
def GetLog
 Returns the log of nodes and elements added or removed since the previous clear of the log.
def ClearLog
 Clears the log of nodes and elements added or removed since the previous clear.
def SetAutoColor
 Toggles auto color mode on the object.
def GetAutoColor
 Gets flag of object auto color mode.
def GetId
 Gets the internal ID.
def GetStudyId
 Get the study Id.
def HasDuplicatedGroupNamesMED
 Checks the group names for duplications.
def GetMeshEditor
 Obtains the mesh editor tool.
def GetMEDMesh
 Gets MED Mesh.
def GetMeshInfo
 Gets the mesh stattistic.
def NbNodes
 Returns the number of nodes in the mesh.
def NbElements
 Returns the number of elements in the mesh.
def Nb0DElements
 Returns the number of 0d elements in the mesh.
def NbEdges
 Returns the number of edges in the mesh.
def NbEdgesOfOrder
 Returns the number of edges with the given order in the mesh.
def NbFaces
 Returns the number of faces in the mesh.
def NbFacesOfOrder
 Returns the number of faces with the given order in the mesh.
def NbTriangles
 Returns the number of triangles in the mesh.
def NbTrianglesOfOrder
 Returns the number of triangles with the given order in the mesh.
def NbQuadrangles
 Returns the number of quadrangles in the mesh.
def NbQuadranglesOfOrder
 Returns the number of quadrangles with the given order in the mesh.
def NbPolygons
 Returns the number of polygons in the mesh.
def NbVolumes
 Returns the number of volumes in the mesh.
def NbVolumesOfOrder
 Returns the number of volumes with the given order in the mesh.
def NbTetras
 Returns the number of tetrahedrons in the mesh.
def NbTetrasOfOrder
 Returns the number of tetrahedrons with the given order in the mesh.
def NbHexas
 Returns the number of hexahedrons in the mesh.
def NbHexasOfOrder
 Returns the number of hexahedrons with the given order in the mesh.
def NbPyramids
 Returns the number of pyramids in the mesh.
def NbPyramidsOfOrder
 Returns the number of pyramids with the given order in the mesh.
def NbPrisms
 Returns the number of prisms in the mesh.
def NbPrismsOfOrder
 Returns the number of prisms with the given order in the mesh.
def NbPolyhedrons
 Returns the number of polyhedrons in the mesh.
def NbSubMesh
 Returns the number of submeshes in the mesh.
def GetElementsId
 Returns the list of mesh elements IDs.
def GetElementsByType
 Returns the list of IDs of mesh elements with the given type.
def GetNodesId
 Returns the list of mesh nodes IDs.
def GetElementType
 Returns the type of mesh element.
def GetSubMeshElementsId
 Returns the list of submesh elements IDs.
def GetSubMeshNodesId
 Returns the list of submesh nodes IDs.
def GetSubMeshElementType
 Returns type of elements on given shape.
def Dump
 Gets the mesh description.
def GetNodeXYZ
 Gets XYZ coordinates of a node
If there is no nodes for the given ID - returns an empty list.
def GetNodeInverseElements
 Returns list of IDs of inverse elements for the given node
If there is no node for the given ID - returns an empty list.
def GetNodePosition
 Returns the position of a node on the shape.
def GetShapeID
 If the given element is a node, returns the ID of shape
If there is no node for the given ID - returns -1.
def GetShapeIDForElem
 Returns the ID of the result shape after FindShape() from SMESH_MeshEditor for the given element
If there is no element for the given ID - returns -1.
def GetElemNbNodes
 Returns the number of nodes for the given element
If there is no element for the given ID - returns -1.
def GetElemNode
 Returns the node ID the given index for the given element
If there is no element for the given ID - returns -1
If there is no node for the given index - returns -2.
def GetElemNodes
 Returns the IDs of nodes of the given element.
def IsMediumNode
 Returns true if the given node is the medium node in the given quadratic element.
def IsMediumNodeOfAnyElem
 Returns true if the given node is the medium node in one of quadratic elements.
def ElemNbEdges
 Returns the number of edges for the given element.
def ElemNbFaces
 Returns the number of faces for the given element.
def IsPoly
 Returns true if the given element is a polygon.
def IsQuadratic
 Returns true if the given element is quadratic.
def BaryCenter
 Returns XYZ coordinates of the barycenter of the given element
If there is no element for the given ID - returns an empty list.
def RemoveElements
 Removes the elements from the mesh by ids.
def RemoveNodes
 Removes nodes from mesh by ids.
def AddNode
 Add a node to the mesh by coordinates.
def Add0DElement
 Creates a 0D element on a node with given number.
def AddEdge
 Creates a linear or quadratic edge (this is determined by the number of given nodes).
def AddFace
 Creates a linear or quadratic face (this is determined by the number of given nodes).
def AddPolygonalFace
 Adds a polygonal face to the mesh by the list of node IDs.
def AddVolume
 Creates both simple and quadratic volume (this is determined by the number of given nodes).
def AddPolyhedralVolume
 Creates a volume of many faces, giving nodes for each face.
def AddPolyhedralVolumeByFaces
 Creates a volume of many faces, giving the IDs of the existing faces.
def SetNodeOnVertex
 Binds a node to a vertex.
def SetNodeOnEdge
 Stores the node position on an edge.
def SetNodeOnFace
 Stores node position on a face.
def SetNodeInVolume
 Binds a node to a solid.
def SetMeshElementOnShape
 Bind an element to a shape.
def MoveNode
 Moves the node with the given id.
def MoveClosestNodeToPoint
 Finds the node closest to a point and moves it to a point location.
def FindNodeClosestTo
 Finds the node closest to a point.
def FindElementsByPoint
 Finds the elements where a point lays IN or ON.
def MeshToPassThroughAPoint
 Finds the node closest to a point and moves it to a point location.
def InverseDiag
 Replaces two neighbour triangles sharing Node1-Node2 link with the triangles built on the same 4 nodes but having other common link.
def DeleteDiag
 Replaces two neighbour triangles sharing Node1-Node2 link with a quadrangle built on the same 4 nodes.
def Reorient
 Reorients elements by ids.
def ReorientObject
 Reorients all elements of the object.
def TriToQuad
 Fuses the neighbouring triangles into quadrangles.
def TriToQuadObject
 Fuses the neighbouring triangles of the object into quadrangles.
def QuadToTri
 Splits quadrangles into triangles.
def QuadToTriObject
 Splits quadrangles into triangles.
def SplitQuad
 Splits quadrangles into triangles.
def SplitQuadObject
 Splits quadrangles into triangles.
def BestSplit
 Finds a better splitting of the given quadrangle.
def SplitQuadsNearTriangularFacets
 Splits quadrangle faces near triangular facets of volumes.
def SplitHexaToTetras
 Splits hexahedrons into tetrahedrons.
def SplitHexaToPrisms
 Split hexahedrons into prisms.
def Smooth
 Smoothes elements.
def SmoothObject
 Smoothes elements which belong to the given object.
def SmoothParametric
 Parametrically smoothes the given elements.
def SmoothParametricObject
 Parametrically smoothes the elements which belong to the given object.
def ConvertToQuadratic
 Converts the mesh to quadratic, deletes old elements, replacing them with quadratic with the same id.
def ConvertFromQuadratic
 Converts the mesh from quadratic to ordinary, deletes old quadratic elements,
replacing them with ordinary mesh elements with the same id.
def Make2DMeshFrom3D
 Creates 2D mesh as skin on boundary faces of a 3D mesh.
def RenumberNodes
 Renumber mesh nodes.
def RenumberElements
 Renumber mesh elements.
def RotationSweep
 Generates new elements by rotation of the elements around the axis.
def RotationSweepObject
 Generates new elements by rotation of the elements of object around the axis.
def RotationSweepObject1D
 Generates new elements by rotation of the elements of object around the axis.
def RotationSweepObject2D
 Generates new elements by rotation of the elements of object around the axis.
def ExtrusionSweep
 Generates new elements by extrusion of the elements with given ids.
def AdvancedExtrusion
 Generates new elements by extrusion of the elements with given ids.
def ExtrusionSweepObject
 Generates new elements by extrusion of the elements which belong to the object.
def ExtrusionSweepObject1D
 Generates new elements by extrusion of the elements which belong to the object.
def ExtrusionSweepObject2D
 Generates new elements by extrusion of the elements which belong to the object.
def ExtrusionAlongPathX
 Generates new elements by extrusion of the given elements The path of extrusion must be a meshed edge.
def ExtrusionAlongPath
 Generates new elements by extrusion of the given elements The path of extrusion must be a meshed edge.
def ExtrusionAlongPathObject
 Generates new elements by extrusion of the elements which belong to the object The path of extrusion must be a meshed edge.
def ExtrusionAlongPathObject1D
 Generates new elements by extrusion of the elements which belong to the object The path of extrusion must be a meshed edge.
def ExtrusionAlongPathObject2D
 Generates new elements by extrusion of the elements which belong to the object The path of extrusion must be a meshed edge.
def Mirror
 Creates a symmetrical copy of mesh elements.
def MirrorMakeMesh
 Creates a new mesh by a symmetrical copy of mesh elements.
def MirrorObject
 Creates a symmetrical copy of the object.
def MirrorObjectMakeMesh
 Creates a new mesh by a symmetrical copy of the object.
def Translate
 Translates the elements.
def TranslateMakeMesh
 Creates a new mesh of translated elements.
def TranslateObject
 Translates the object.
def TranslateObjectMakeMesh
 Creates a new mesh from the translated object.
def Rotate
 Rotates the elements.
def RotateMakeMesh
 Creates a new mesh of rotated elements.
def RotateObject
 Rotates the object.
def RotateObjectMakeMesh
 Creates a new mesh from the rotated object.
def FindCoincidentNodes
 Finds groups of ajacent nodes within Tolerance.
def FindCoincidentNodesOnPart
 Finds groups of ajacent nodes within Tolerance.
def MergeNodes
 Merges nodes.
def FindEqualElements
 Finds the elements built on the same nodes.
def MergeElements
 Merges elements in each given group.
def MergeEqualElements
 Leaves one element and removes all other elements built on the same nodes.
def SewFreeBorders
 Sews free borders.
def SewConformFreeBorders
 Sews conform free borders.
def SewBorderToSide
 Sews border to side.
def SewSideElements
 Sews two sides of a mesh.
def ChangeElemNodes
 Sets new nodes for the given element.
def GetLastCreatedNodes
 If during the last operation of MeshEditor some nodes were created, this method returns the list of their IDs,
if new nodes were not created - returns empty list.
def GetLastCreatedElems
 If during the last operation of MeshEditor some elements were created this method returns the list of their IDs,
if new elements were not created - returns empty list.
def DoubleNodes
def DoubleNode
 Creates a hole in a mesh by doubling the nodes of some particular elements This method provided for convenience works as DoubleNodes() described above.
def DoubleNodeGroup
 Creates a hole in a mesh by doubling the nodes of some particular elements This method provided for convenience works as DoubleNodes() described above.
def DoubleNodeGroups
 Creates a hole in a mesh by doubling the nodes of some particular elements This method provided for convenience works as DoubleNodes() described above.
def DoubleNodeElem
 Creates a hole in a mesh by doubling the nodes of some particular elements.
def DoubleNodeElemInRegion
 Creates a hole in a mesh by doubling the nodes of some particular elements.
def DoubleNodeElemGroup
 Creates a hole in a mesh by doubling the nodes of some particular elements This method provided for convenience works as DoubleNodes() described above.
def DoubleNodeElemGroupInRegion
 Creates a hole in a mesh by doubling the nodes of some particular elements This method provided for convenience works as DoubleNodes() described above.
def DoubleNodeElemGroups
 Creates a hole in a mesh by doubling the nodes of some particular elements This method provided for convenience works as DoubleNodes() described above.
def DoubleNodeElemGroupsInRegion
 Creates a hole in a mesh by doubling the nodes of some particular elements This method provided for convenience works as DoubleNodes() described above.

Data Fields

 smeshpyD
 geompyD
 geom
 mesh
 editor

Static Public Attributes

int geom = 0
int mesh = 0
int editor = 0

Detailed Description

This class allows defining and managing a mesh.

It has a set of methods to build a mesh on the given geometry, including the definition of sub-meshes. It also has methods to define groups of mesh elements, to modify a mesh (by addition of new nodes and elements and by changing the existing entities), to get information about a mesh and to export a mesh into different formats.


Member Function Documentation

def Evaluate (   self,
  geom = 0 
)

Evaluates size of prospective mesh on a shape.

Returns:
True or False
def DoubleNodes (   self,
  theNodes,
  theModifiedElems 
)

Field Documentation

int geom = 0 [static]
int mesh = 0 [static]
int editor = 0 [static]
 All Data Structures Namespaces Files Functions Variables

Copyright © 2007-2008 CEA/DEN, EDF R&D, OPEN CASCADE
Copyright © 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN, CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS