Open CASCADE Technology: MeshVS_DataSource Class Reference

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Public Member Functions
MeshVS_DataSource Class Referenceabstract

The deferred class using for the following tasks: 1) Receiving geometry data about single element of node by its number; 2) Receiving type of element or node by its number; 3) Receiving topological information about links between element and nodes it consist of; 4) Receiving information about what element cover this node; 5) Receiving information about all nodes and elements the object consist of 6) Activation of advanced mesh selection. In the advanced mesh selection mode there is created: More...

`#include <MeshVS_DataSource.hxx>`

Inheritance diagram for MeshVS_DataSource:
[legend]

## Public Member Functions
virtual Standard_Boolean | GetGeom (const Standard_Integer ID, const Standard_Boolean IsElement, TColStd_Array1OfReal &Coords, Standard_Integer &NbNodes, MeshVS_EntityType &Type) const =0
| Returns geometry information about node or element ID is the numerical identificator of node or element IsElement indicates this ID describe node ( if Standard_False ) or element ( if Standard_True ) Coords is an array of co-ordinates of node(s). For node it is only 3 numbers: X, Y, Z in the strict order For element it is 3*n numbers, where n is number of this element vertices The order is strict also: X1, Y1, Z1, X2,...., where Xi, Yi, Zi are co-ordinates of vertices NbNodes is number of nodes. It is recommended this parameter to be set to 1 for node. Type is type of node or element (from enumeration). It is recommended this parameter to be set to MeshVS_ET_Node for node. More...
virtual Standard_Boolean | GetGeomType (const Standard_Integer ID, const Standard_Boolean IsElement, MeshVS_EntityType &Type) const =0
| This method is similar to GetGeom, but returns only element or node type. More...
virtual Standard_Boolean | Get3DGeom (const Standard_Integer ID, Standard_Integer &NbNodes, Handle< MeshVS_HArray1OfSequenceOfInteger > &Data) const
| This method returns topology information about 3D-element Returns false if element with ID isn't 3D or because other troubles. More...
virtual Standard_Address | GetAddr (const Standard_Integer ID, const Standard_Boolean IsElement) const =0
| This method returns pointer which represents element or node data structure. This address will be saved in MeshVS_MeshEntityOwner, so that you can access to data structure fast by the method Owner(). In the redefined method you can return NULL. ID is the numerical identificator of node or element IsElement indicates this ID describe node ( if Standard_False ) or element ( if Standard_True ) More...
virtual Standard_Boolean | GetNodesByElement (const Standard_Integer ID, TColStd_Array1OfInteger &NodeIDs, Standard_Integer &NbNodes) const =0
| This method returns information about nodes this element consist of. ID is the numerical identificator of element. NodeIDs is the output array of nodes IDs in correct order, the same as coordinates returned by GetGeom(). NbNodes is number of nodes (number of items set in NodeIDs). Returns False if element does not exist. More...
virtual const TColStd_PackedMapOfInteger & | GetAllNodes () const =0
| This method returns map of all nodes the object consist of. More...
virtual const TColStd_PackedMapOfInteger & | GetAllElements () const =0
| This method returns map of all elements the object consist of. More...
virtual Standard_Boolean | GetNormal (const Standard_Integer Id, const Standard_Integer Max, Standard_Real &nx, Standard_Real &ny, Standard_Real &nz) const
| This method calculates normal of face, which is using for correct reflection presentation. There is default method, for advance reflection this method can be redefined. Id is the numerical identificator of only element! Max is maximal number of nodes an element can consist of nx, ny, nz are values whose represent co-ordinates of normal (will be returned) In the redefined method you can return normal with length more then 1, but in this case the appearance of element will be more bright than usual. For ordinary brightness you must return normal with length 1. More...
virtual Standard_Boolean | GetNodeNormal (const Standard_Integer ranknode, const Standard_Integer ElementId, Standard_Real &nx, Standard_Real &ny, Standard_Real &nz) const
| This method return normal of node ranknode of face Id, which is using for smooth shading presentation. Returns false if normal isn't defined. More...
virtual Standard_Boolean | GetNormalsByElement (const Standard_Integer Id, const Standard_Boolean IsNodal, const Standard_Integer MaxNodes, Handle< TColStd_HArray1OfReal > &Normals) const
| This method puts components of normal vectors at each node of a mesh face (at each face of a mesh volume) into the output array. Returns false if some problem was detected during calculation of normals. Id is an identifier of the mesh element. IsNodal, when true, means that normals at mesh element nodes are needed. If nodal normals are not available, or IsNodal is false, or the mesh element is a volume, then the output array contents depend on the element type: face: a normal calculated by GetNormal() is duplicated for each node of the face; volume: normals to all faces of the volume are computed (not for each node!). MaxNodes is maximal number of nodes an element can consist of. Normals contains the result. More...
virtual void | GetAllGroups (TColStd_PackedMapOfInteger &Ids) const
| This method returns map of all groups the object contains. More...
virtual Standard_Boolean | GetGroup (const Standard_Integer Id, MeshVS_EntityType &Type, TColStd_PackedMapOfInteger &Ids) const
| This method returns map of all group elements. More...
virtual Standard_Address | GetGroupAddr (const Standard_Integer ID) const
| This method returns pointer which represents group data structure. This address will be saved in MeshVS_MeshOwner, so that you can access to data structure fast by the method Owner(). In the redefined method you can return NULL. ID is the numerical identificator of group. More...
virtual Standard_Boolean | IsAdvancedSelectionEnabled () const
| Returns True if advanced mesh selection is enabled. Default implementation returns False. It should be redefined to return True for advanced mesh selection activation. More...
virtual Bnd_Box | GetBoundingBox () const
| Returns the bounding box of the whole mesh. It is used in advanced selection mode to define roughly the sensitive area of the mesh. It can be redefined to get access to a box computed in advance. More...
virtual Standard_Boolean | GetDetectedEntities (const Handle< MeshVS_Mesh > &Prs, const Standard_Real X, const Standard_Real Y, const Standard_Real aTol, Handle< TColStd_HPackedMapOfInteger > &Nodes, Handle< TColStd_HPackedMapOfInteger > &Elements, Standard_Real &DMin)
| Returns maps of entities (nodes and elements) detected by mouse click at the point (X,Y) on the current view plane, with the tolerance aTol. DMin - is out argument should return actual detection tolerance. Returns True if something is detected. It should be redefined if the advanced mesh selection is activated. Default implementation returns False. More...
virtual Standard_Boolean | GetDetectedEntities (const Handle< MeshVS_Mesh > &Prs, const Standard_Real XMin, const Standard_Real YMin, const Standard_Real XMax, const Standard_Real YMax, const Standard_Real aTol, Handle< TColStd_HPackedMapOfInteger > &Nodes, Handle< TColStd_HPackedMapOfInteger > &Elements)
| Returns maps of entities (nodes and elements) detected by mouse selection with rectangular box (XMin, YMin, XMax, YMax) on the current veiw plane, with the tolerance aTol. Returns True if something is detected. It should be redefined if the advanced mesh selection is activated. Default implementation returns False. More...
virtual Standard_Boolean | GetDetectedEntities (const Handle< MeshVS_Mesh > &Prs, const TColgp_Array1OfPnt2d &Polyline, const Bnd_Box2d &aBox, const Standard_Real aTol, Handle< TColStd_HPackedMapOfInteger > &Nodes, Handle< TColStd_HPackedMapOfInteger > &Elements)
| Returns maps of entities (nodes and elements) detected by mouse selection with the polyline <Polyline> on the current veiw plane, with the tolerance aTol. Returns True if something is detected. It should be redefined if the advanced mesh selection is activated. Default implementation returns False. More...
virtual Standard_Boolean | GetDetectedEntities (const Handle< MeshVS_Mesh > &Prs, Handle< TColStd_HPackedMapOfInteger > &Nodes, Handle< TColStd_HPackedMapOfInteger > &Elements)
| Filter out the maps of mesh entities so as to keep only the entities that are allowed to be selected according to the current context. Returns True if any of the maps has been changed. It should be redefined if the advanced mesh selection is activated. Default implementation returns False. More...
Public Member Functions inherited from MMgt_TShared
virtual void | Delete () const
| Memory deallocator for transient classes. More...
Public Member Functions inherited from Standard_Transient
| Standard_Transient ()
| Empty constructor. More...
| Standard_Transient (const Standard_Transient &)
| Copy constructor – does nothing. More...
Standard_Transient & | operator= (const Standard_Transient &)
| Assignment operator, needed to avoid copying reference counter. More...
virtual | ~Standard_Transient ()
| Destructor must be virtual. More...
virtual const Handle_Standard_Type & | DynamicType () const
| Returns a type information object about this object. More...
Standard_Boolean | IsInstance (const Handle_Standard_Type &theType) const
| Returns a true value if this is an instance of Type. More...
Standard_Boolean | IsInstance (const Standard_CString theTypeName) const
| Returns a true value if this is an instance of TypeName. More...
Standard_Boolean | IsKind (const Handle_Standard_Type &theType) const
| Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...
Standard_Boolean | IsKind (const Standard_CString theTypeName) const
| Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...
virtual Handle_Standard_Transient | This () const
| Returns a Handle which references this object. Must never be called to objects created in stack. More...
Standard_Integer | GetRefCount () const
| Get the reference counter of this object. More...

## Detailed Description

The deferred class using for the following tasks: 1) Receiving geometry data about single element of node by its number; 2) Receiving type of element or node by its number; 3) Receiving topological information about links between element and nodes it consist of; 4) Receiving information about what element cover this node; 5) Receiving information about all nodes and elements the object consist of 6) Activation of advanced mesh selection. In the advanced mesh selection mode there is created:

- one owner for the whole mesh and for all selection modes
- one sensitive entity for the whole mesh and for each selection mode Receiving of IDs of detected entities (nodes and elements) in a viewer is achieved by implementation of a group of methods GetDetectedEntities.

## Member Function Documentation

virtual Standard_Boolean MeshVS_DataSource::Get3DGeom | ( | const Standard_Integer | ID,
|  | Standard_Integer & | NbNodes,
|  | Handle< MeshVS_HArray1OfSequenceOfInteger > & | Data
| ) |  | const
| virtual

This method returns topology information about 3D-element Returns false if element with ID isn't 3D or because other troubles.

Reimplemented in MeshVS_DeformedDataSource, and XSDRAWSTLVRML_DataSource3D.

virtual Standard_Address MeshVS_DataSource::GetAddr | ( | const Standard_Integer | ID,
|  | const Standard_Boolean | IsElement
| ) |  | const
| pure virtual

This method returns pointer which represents element or node data structure. This address will be saved in MeshVS_MeshEntityOwner, so that you can access to data structure fast by the method Owner(). In the redefined method you can return NULL. ID is the numerical identificator of node or element IsElement indicates this ID describe node ( if Standard_False ) or element ( if Standard_True )

Implemented in XSDRAWSTLVRML_DataSource3D, MeshVS_DeformedDataSource, and XSDRAWSTLVRML_DataSource.

virtual const TColStd_PackedMapOfInteger& MeshVS_DataSource::GetAllElements | ( |  | ) | const
| pure virtual

This method returns map of all elements the object consist of.

Implemented in XSDRAWSTLVRML_DataSource3D, XSDRAWSTLVRML_DataSource, and MeshVS_DeformedDataSource.

virtual void MeshVS_DataSource::GetAllGroups | ( | TColStd_PackedMapOfInteger & | Ids | ) | const
| virtual

This method returns map of all groups the object contains.

virtual const TColStd_PackedMapOfInteger& MeshVS_DataSource::GetAllNodes | ( |  | ) | const
| pure virtual

This method returns map of all nodes the object consist of.

Implemented in XSDRAWSTLVRML_DataSource3D, MeshVS_DeformedDataSource, and XSDRAWSTLVRML_DataSource.

virtual Bnd_Box MeshVS_DataSource::GetBoundingBox | ( |  | ) | const
| virtual

Returns the bounding box of the whole mesh. It is used in advanced selection mode to define roughly the sensitive area of the mesh. It can be redefined to get access to a box computed in advance.

virtual Standard_Boolean MeshVS_DataSource::GetDetectedEntities | ( | const Handle< MeshVS_Mesh > & | Prs,
|  | const Standard_Real | X,
|  | const Standard_Real | Y,
|  | const Standard_Real | aTol,
|  | Handle< TColStd_HPackedMapOfInteger > & | Nodes,
|  | Handle< TColStd_HPackedMapOfInteger > & | Elements,
|  | Standard_Real & | DMin
| ) |  |
| virtual

Returns maps of entities (nodes and elements) detected by mouse click at the point (X,Y) on the current view plane, with the tolerance aTol. DMin - is out argument should return actual detection tolerance. Returns True if something is detected. It should be redefined if the advanced mesh selection is activated. Default implementation returns False.

virtual Standard_Boolean MeshVS_DataSource::GetDetectedEntities | ( | const Handle< MeshVS_Mesh > & | Prs,
|  | const Standard_Real | XMin,
|  | const Standard_Real | YMin,
|  | const Standard_Real | XMax,
|  | const Standard_Real | YMax,
|  | const Standard_Real | aTol,
|  | Handle< TColStd_HPackedMapOfInteger > & | Nodes,
|  | Handle< TColStd_HPackedMapOfInteger > & | Elements
| ) |  |
| virtual

Returns maps of entities (nodes and elements) detected by mouse selection with rectangular box (XMin, YMin, XMax, YMax) on the current veiw plane, with the tolerance aTol. Returns True if something is detected. It should be redefined if the advanced mesh selection is activated. Default implementation returns False.

virtual Standard_Boolean MeshVS_DataSource::GetDetectedEntities | ( | const Handle< MeshVS_Mesh > & | Prs,
|  | const TColgp_Array1OfPnt2d & | Polyline,
|  | const Bnd_Box2d & | aBox,
|  | const Standard_Real | aTol,
|  | Handle< TColStd_HPackedMapOfInteger > & | Nodes,
|  | Handle< TColStd_HPackedMapOfInteger > & | Elements
| ) |  |
| virtual

Returns maps of entities (nodes and elements) detected by mouse selection with the polyline <Polyline> on the current veiw plane, with the tolerance aTol. Returns True if something is detected. It should be redefined if the advanced mesh selection is activated. Default implementation returns False.

virtual Standard_Boolean MeshVS_DataSource::GetDetectedEntities | ( | const Handle< MeshVS_Mesh > & | Prs,
|  | Handle< TColStd_HPackedMapOfInteger > & | Nodes,
|  | Handle< TColStd_HPackedMapOfInteger > & | Elements
| ) |  |
| virtual

Filter out the maps of mesh entities so as to keep only the entities that are allowed to be selected according to the current context. Returns True if any of the maps has been changed. It should be redefined if the advanced mesh selection is activated. Default implementation returns False.

virtual Standard_Boolean MeshVS_DataSource::GetGeom | ( | const Standard_Integer | ID,
|  | const Standard_Boolean | IsElement,
|  | TColStd_Array1OfReal & | Coords,
|  | Standard_Integer & | NbNodes,
|  | MeshVS_EntityType & | Type
| ) |  | const
| pure virtual

Returns geometry information about node or element ID is the numerical identificator of node or element IsElement indicates this ID describe node ( if Standard_False ) or element ( if Standard_True ) Coords is an array of co-ordinates of node(s). For node it is only 3 numbers: X, Y, Z in the strict order For element it is 3*n numbers, where n is number of this element vertices The order is strict also: X1, Y1, Z1, X2,...., where Xi, Yi, Zi are co-ordinates of vertices NbNodes is number of nodes. It is recommended this parameter to be set to 1 for node. Type is type of node or element (from enumeration). It is recommended this parameter to be set to MeshVS_ET_Node for node.

Implemented in MeshVS_DeformedDataSource, XSDRAWSTLVRML_DataSource3D, and XSDRAWSTLVRML_DataSource.

virtual Standard_Boolean MeshVS_DataSource::GetGeomType | ( | const Standard_Integer | ID,
|  | const Standard_Boolean | IsElement,
|  | MeshVS_EntityType & | Type
| ) |  | const
| pure virtual

This method is similar to GetGeom, but returns only element or node type.

Implemented in XSDRAWSTLVRML_DataSource3D, MeshVS_DeformedDataSource, and XSDRAWSTLVRML_DataSource.

virtual Standard_Boolean MeshVS_DataSource::GetGroup | ( | const Standard_Integer | Id,
|  | MeshVS_EntityType & | Type,
|  | TColStd_PackedMapOfInteger & | Ids
| ) |  | const
| virtual

This method returns map of all group elements.

virtual Standard_Address MeshVS_DataSource::GetGroupAddr | ( | const Standard_Integer | ID | ) | const
| virtual

This method returns pointer which represents group data structure. This address will be saved in MeshVS_MeshOwner, so that you can access to data structure fast by the method Owner(). In the redefined method you can return NULL. ID is the numerical identificator of group.

virtual Standard_Boolean MeshVS_DataSource::GetNodeNormal | ( | const Standard_Integer | ranknode,
|  | const Standard_Integer | ElementId,
|  | Standard_Real & | nx,
|  | Standard_Real & | ny,
|  | Standard_Real & | nz
| ) |  | const
| virtual

This method return normal of node ranknode of face Id, which is using for smooth shading presentation. Returns false if normal isn't defined.

virtual Standard_Boolean MeshVS_DataSource::GetNodesByElement | ( | const Standard_Integer | ID,
|  | TColStd_Array1OfInteger & | NodeIDs,
|  | Standard_Integer & | NbNodes
| ) |  | const
| pure virtual

This method returns information about nodes this element consist of. ID is the numerical identificator of element. NodeIDs is the output array of nodes IDs in correct order, the same as coordinates returned by GetGeom(). NbNodes is number of nodes (number of items set in NodeIDs). Returns False if element does not exist.

Implemented in XSDRAWSTLVRML_DataSource3D, MeshVS_DeformedDataSource, and XSDRAWSTLVRML_DataSource.

virtual Standard_Boolean MeshVS_DataSource::GetNormal | ( | const Standard_Integer | Id,
|  | const Standard_Integer | Max,
|  | Standard_Real & | nx,
|  | Standard_Real & | ny,
|  | Standard_Real & | nz
| ) |  | const
| virtual

This method calculates normal of face, which is using for correct reflection presentation. There is default method, for advance reflection this method can be redefined. Id is the numerical identificator of only element! Max is maximal number of nodes an element can consist of nx, ny, nz are values whose represent co-ordinates of normal (will be returned) In the redefined method you can return normal with length more then 1, but in this case the appearance of element will be more bright than usual. For ordinary brightness you must return normal with length 1.

Reimplemented in XSDRAWSTLVRML_DataSource3D, and XSDRAWSTLVRML_DataSource.

virtual Standard_Boolean MeshVS_DataSource::GetNormalsByElement | ( | const Standard_Integer | Id,
|  | const Standard_Boolean | IsNodal,
|  | const Standard_Integer | MaxNodes,
|  | Handle< TColStd_HArray1OfReal > & | Normals
| ) |  | const
| virtual

This method puts components of normal vectors at each node of a mesh face (at each face of a mesh volume) into the output array. Returns false if some problem was detected during calculation of normals. Id is an identifier of the mesh element. IsNodal, when true, means that normals at mesh element nodes are needed. If nodal normals are not available, or IsNodal is false, or the mesh element is a volume, then the output array contents depend on the element type: face: a normal calculated by GetNormal() is duplicated for each node of the face; volume: normals to all faces of the volume are computed (not for each node!). MaxNodes is maximal number of nodes an element can consist of. Normals contains the result.

virtual Standard_Boolean MeshVS_DataSource::IsAdvancedSelectionEnabled | ( |  | ) | const
| virtual

Returns True if advanced mesh selection is enabled. Default implementation returns False. It should be redefined to return True for advanced mesh selection activation.

The documentation for this class was generated from the following file:

- MeshVS_DataSource.hxx