Open CASCADE Technology  7.4.1.dev
Data Structures | Public Member Functions | Protected Attributes
Poly_CoherentTriangulation Class Reference

#include <Poly_CoherentTriangulation.hxx>

Inheritance diagram for Poly_CoherentTriangulation:
Inheritance graph
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Data Structures

class  IteratorOfLink
 
class  IteratorOfNode
 
class  IteratorOfTriangle
 
struct  TwoIntegers
 Couple of integer indices (used in RemoveDegenerated()). More...
 

Public Member Functions

 Poly_CoherentTriangulation (const Handle< NCollection_BaseAllocator > &theAlloc=0L)
 
 Poly_CoherentTriangulation (const Handle< Poly_Triangulation > &theTriangulation, const Handle< NCollection_BaseAllocator > &theAlloc=0L)
 
virtual ~Poly_CoherentTriangulation ()
 
Handle< Poly_TriangulationGetTriangulation () const
 
Standard_Boolean RemoveDegenerated (const Standard_Real theTol, NCollection_List< TwoIntegers > *pLstRemovedNode=0L)
 
Standard_Boolean GetFreeNodes (NCollection_List< Standard_Integer > &lstNodes) const
 
Standard_Integer MaxNode () const
 
Standard_Integer MaxTriangle () const
 
void SetDeflection (const Standard_Real theDefl)
 
Standard_Real Deflection () const
 
Standard_Integer SetNode (const gp_XYZ &thePnt, const Standard_Integer iN=-1)
 
const Poly_CoherentNodeNode (const Standard_Integer i) const
 
Poly_CoherentNodeChangeNode (const Standard_Integer i)
 
Standard_Integer NNodes () const
 
const Poly_CoherentTriangleTriangle (const Standard_Integer i) const
 
Standard_Integer NTriangles () const
 
Standard_Integer NLinks () const
 
Standard_Boolean RemoveTriangle (Poly_CoherentTriangle &theTr)
 
void RemoveLink (Poly_CoherentLink &theLink)
 
Poly_CoherentTriangleAddTriangle (const Standard_Integer iNode0, const Standard_Integer iNode1, const Standard_Integer iNode2)
 
Standard_Boolean ReplaceNodes (Poly_CoherentTriangle &theTriangle, const Standard_Integer iNode0, const Standard_Integer iNode1, const Standard_Integer iNode2)
 
Poly_CoherentLinkAddLink (const Poly_CoherentTriangle &theTri, const Standard_Integer theConn)
 
Standard_Boolean FindTriangle (const Poly_CoherentLink &theLink, const Poly_CoherentTriangle *pTri[2]) const
 
Standard_Integer ComputeLinks ()
 
void ClearLinks ()
 
const Handle< NCollection_BaseAllocator > & Allocator () const
 
Handle< Poly_CoherentTriangulationClone (const Handle< NCollection_BaseAllocator > &theAlloc) const
 
void Dump (Standard_OStream &) const
 
- Public Member Functions inherited from Standard_Transient
 Standard_Transient ()
 Empty constructor. More...
 
 Standard_Transient (const Standard_Transient &)
 Copy constructor – does nothing. More...
 
Standard_Transientoperator= (const Standard_Transient &)
 Assignment operator, needed to avoid copying reference counter. More...
 
virtual ~Standard_Transient ()
 Destructor must be virtual. More...
 
virtual void Delete () const
 Memory deallocator for transient classes. More...
 
virtual const opencascade::handle< Standard_Type > & DynamicType () const
 Returns a type descriptor about this object. More...
 
Standard_Boolean IsInstance (const opencascade::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 opencascade::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...
 
Standard_TransientThis () const
 Returns non-const pointer to this object (like const_cast). For protection against creating handle to objects allocated in stack or call from constructor, it will raise exception Standard_ProgramError if reference counter is zero. More...
 
Standard_Integer GetRefCount () const
 Get the reference counter of this object. More...
 
void IncrementRefCounter () const
 Increments the reference counter of this object. More...
 
Standard_Integer DecrementRefCounter () const
 Decrements the reference counter of this object; returns the decremented value. More...
 

Protected Attributes

NCollection_Vector< Poly_CoherentTrianglemyTriangles
 
NCollection_Vector< Poly_CoherentNodemyNodes
 
NCollection_Vector< Poly_CoherentLinkmyLinks
 
Handle< NCollection_BaseAllocatormyAlloc
 
Standard_Real myDeflection
 

Additional Inherited Members

- Public Types inherited from Standard_Transient
typedef void base_type
 Returns a type descriptor about this object. More...
 
- Static Public Member Functions inherited from Standard_Transient
static const char * get_type_name ()
 Returns a type descriptor about this object. More...
 
static const opencascade::handle< Standard_Type > & get_type_descriptor ()
 Returns type descriptor of Standard_Transient class. More...
 

Detailed Description

Triangulation structure that allows to:

This class is useful for algorithms that need to analyse and/or edit a triangulated mesh – for example for mesh refining. The connectivity model follows the idea that all Triangles in a mesh should have coherent orientation like on a surface of a solid body. Connections between more than 2 triangles are not suppoorted.

Architecture

The data types used in this structure are:

Constructor & Destructor Documentation

◆ Poly_CoherentTriangulation() [1/2]

Poly_CoherentTriangulation::Poly_CoherentTriangulation ( const Handle< NCollection_BaseAllocator > &  theAlloc = 0L)

Empty constructor.

◆ Poly_CoherentTriangulation() [2/2]

Poly_CoherentTriangulation::Poly_CoherentTriangulation ( const Handle< Poly_Triangulation > &  theTriangulation,
const Handle< NCollection_BaseAllocator > &  theAlloc = 0L 
)

Constructor. It does not create Links, you should call ComputeLinks following this constructor if you need these links.

◆ ~Poly_CoherentTriangulation()

virtual Poly_CoherentTriangulation::~Poly_CoherentTriangulation ( )
virtual

Destructor.

Member Function Documentation

◆ AddLink()

Poly_CoherentLink* Poly_CoherentTriangulation::AddLink ( const Poly_CoherentTriangle theTri,
const Standard_Integer  theConn 
)

Add a single link to triangulation, based on a triangle and its side index. This method does not check for coincidence with already present links.

Parameters
theTriTriangle that contains the link to be added.
theConnIndex of the side (i.e., 0, 1 0r 2) defining the added link.

◆ AddTriangle()

Poly_CoherentTriangle* Poly_CoherentTriangulation::AddTriangle ( const Standard_Integer  iNode0,
const Standard_Integer  iNode1,
const Standard_Integer  iNode2 
)

Add a triangle to the triangulation.

Returns
Pointer to the added triangle instance or NULL if an error occurred.

◆ Allocator()

const Handle< NCollection_BaseAllocator >& Poly_CoherentTriangulation::Allocator ( ) const
inline

Query the allocator of elements, this allocator can be used for other objects

◆ ChangeNode()

Poly_CoherentNode& Poly_CoherentTriangulation::ChangeNode ( const Standard_Integer  i)
inline

Get the node at the given index 'i'.

◆ ClearLinks()

void Poly_CoherentTriangulation::ClearLinks ( )

Clear all Links data from the Triangulation data.

◆ Clone()

Handle< Poly_CoherentTriangulation > Poly_CoherentTriangulation::Clone ( const Handle< NCollection_BaseAllocator > &  theAlloc) const

Create a copy of this Triangulation, using the given allocator.

◆ ComputeLinks()

Standard_Integer Poly_CoherentTriangulation::ComputeLinks ( )

(Re)Calculate all links in this Triangulation.

◆ Deflection()

Standard_Real Poly_CoherentTriangulation::Deflection ( ) const
inline

Query the Deflection parameter (default value 0. – if never initialized)

◆ Dump()

void Poly_CoherentTriangulation::Dump ( Standard_OStream ) const

Debugging output.

◆ FindTriangle()

Standard_Boolean Poly_CoherentTriangulation::FindTriangle ( const Poly_CoherentLink theLink,
const Poly_CoherentTriangle pTri[2] 
) const

Find one or two triangles that share the given couple of nodes.

Parameters
theLinkLink (in fact, just a couple of nodes) on which the triangle is searched.
pTri[out] Array of two pointers to triangle. pTri[0] stores the triangle to the left of the link, while pTri[1] stores the one to the right of the link.
Returns
True if at least one triangle is found and output as pTri.

◆ GetFreeNodes()

Standard_Boolean Poly_CoherentTriangulation::GetFreeNodes ( NCollection_List< Standard_Integer > &  lstNodes) const

Create a list of free nodes. These nodes may appear as a result of any custom mesh decimation or RemoveDegenerated() call. This analysis is necessary if you support additional data structures based on the triangulation (e.g., edges on the surface boundary).

Parameters
lstNodes[out] List that receives the indices of free nodes.

◆ GetTriangulation()

Handle< Poly_Triangulation > Poly_CoherentTriangulation::GetTriangulation ( ) const

Create an instance of Poly_Triangulation from this object.

◆ MaxNode()

Standard_Integer Poly_CoherentTriangulation::MaxNode ( ) const
inline

Query the index of the last node in the triangulation

◆ MaxTriangle()

Standard_Integer Poly_CoherentTriangulation::MaxTriangle ( ) const
inline

Query the index of the last triangle in the triangulation

◆ NLinks()

Standard_Integer Poly_CoherentTriangulation::NLinks ( ) const

Query the total number of active Links.

◆ NNodes()

Standard_Integer Poly_CoherentTriangulation::NNodes ( ) const

Query the total number of active nodes (i.e. nodes used by 1 or more triangles)

◆ Node()

const Poly_CoherentNode& Poly_CoherentTriangulation::Node ( const Standard_Integer  i) const
inline

Get the node at the given index 'i'.

◆ NTriangles()

Standard_Integer Poly_CoherentTriangulation::NTriangles ( ) const

Query the total number of active triangles (i.e. triangles that refer nodes, non-empty ones)

◆ RemoveDegenerated()

Standard_Boolean Poly_CoherentTriangulation::RemoveDegenerated ( const Standard_Real  theTol,
NCollection_List< TwoIntegers > *  pLstRemovedNode = 0L 
)

Find and remove degenerated triangles in Triangulation.

Parameters
theTolTolerance for the degeneration case. If any two nodes of a triangle have the distance less than this tolerance, this triangle is considered degenerated and therefore removed by this method.
pLstRemovedNodeOptional parameter. If defined, then it will receive the list of arrays where the first number is the index of removed node and the seond - the index of remaining node to which the mesh was reconnected.

◆ RemoveLink()

void Poly_CoherentTriangulation::RemoveLink ( Poly_CoherentLink theLink)

Removal of a single link from the triangulation.

◆ RemoveTriangle()

Standard_Boolean Poly_CoherentTriangulation::RemoveTriangle ( Poly_CoherentTriangle theTr)

Removal of a single triangle from the triangulation.

◆ ReplaceNodes()

Standard_Boolean Poly_CoherentTriangulation::ReplaceNodes ( Poly_CoherentTriangle theTriangle,
const Standard_Integer  iNode0,
const Standard_Integer  iNode1,
const Standard_Integer  iNode2 
)

Replace nodes in the given triangle.

Returns
True if operation succeeded.

◆ SetDeflection()

void Poly_CoherentTriangulation::SetDeflection ( const Standard_Real  theDefl)
inline

Set the Deflection value as the parameter of the given triangulation.

◆ SetNode()

Standard_Integer Poly_CoherentTriangulation::SetNode ( const gp_XYZ thePnt,
const Standard_Integer  iN = -1 
)

Initialize a node

Parameters
thePoint3D Coordinates of the node.
iNIndex of the node. If negative (default), the node is added to the end of the current array of nodes.
Returns
Index of the added node.

◆ Triangle()

const Poly_CoherentTriangle& Poly_CoherentTriangulation::Triangle ( const Standard_Integer  i) const
inline

Get the triangle at the given index 'i'.

Field Documentation

◆ myAlloc

Handle< NCollection_BaseAllocator > Poly_CoherentTriangulation::myAlloc
protected

◆ myDeflection

Standard_Real Poly_CoherentTriangulation::myDeflection
protected

◆ myLinks

NCollection_Vector<Poly_CoherentLink> Poly_CoherentTriangulation::myLinks
protected

◆ myNodes

NCollection_Vector<Poly_CoherentNode> Poly_CoherentTriangulation::myNodes
protected

◆ myTriangles

NCollection_Vector<Poly_CoherentTriangle> Poly_CoherentTriangulation::myTriangles
protected

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