Provides a triangulation for a surface, a set of surfaces, or more generally a shape. A triangulation consists of an approximate representation of the actual shape, using a collection of points and triangles. The points are located on the surface. The edges of the triangles connect adjacent points with a straight line that approximates the true curve on the surface. A triangulation comprises: More...

#include <Poly_Triangulation.hxx>

Inheritance diagram for Poly_Triangulation:

[legend]

Public Member Functions
	Poly_Triangulation (const Standard_Integer nbNodes, const Standard_Integer nbTriangles, const Standard_Boolean UVNodes)
	Constructs a triangulation from a set of triangles. The triangulation is initialized without a triangle or a node, but capable of containing nbNodes nodes, and nbTriangles triangles. Here the UVNodes flag indicates whether 2D nodes will be associated with 3D ones, (i.e. to enable a 2D representation). More...

	Poly_Triangulation (const TColgp_Array1OfPnt &Nodes, const Poly_Array1OfTriangle &Triangles)
	Constructs a triangulation from a set of triangles. The triangulation is initialized with 3D points from Nodes and triangles from Triangles. More...

	Poly_Triangulation (const TColgp_Array1OfPnt &Nodes, const TColgp_Array1OfPnt2d &UVNodes, const Poly_Array1OfTriangle &Triangles)
	Constructs a triangulation from a set of triangles. The triangulation is initialized with 3D points from Nodes, 2D points from UVNodes and triangles from Triangles, where coordinates of a 2D point from UVNodes are the (u, v) parameters of the corresponding 3D point from Nodes on the surface approximated by the constructed triangulation. More...

virtual Handle< Poly_Triangulation >	Copy () const
	Creates full copy of current triangulation. More...

	Poly_Triangulation (const Handle< Poly_Triangulation > &theTriangulation)
	Copy constructor for triangulation. More...

Standard_Real	Deflection () const
	Returns the deflection of this triangulation. More...

void	Deflection (const Standard_Real theDeflection)
	Sets the deflection of this triangulation to theDeflection. See more on deflection in Polygon2D. More...

void	RemoveUVNodes ()
	Deallocates the UV nodes. More...

Standard_Integer	NbNodes () const
	Returns the number of nodes for this triangulation. More...

Standard_Integer	NbTriangles () const
	Returns the number of triangles for this triangulation. More...

Standard_Boolean	HasUVNodes () const
	Returns Standard_True if 2D nodes are associated with 3D nodes for this triangulation. More...

const TColgp_Array1OfPnt &	Nodes () const
	Returns the table of 3D nodes (3D points) for this triangulation. More...

TColgp_Array1OfPnt &	ChangeNodes ()
	Returns the table of 3D nodes (3D points) for this triangulation. The returned array is shared. Therefore if the table is selected by reference, you can, by simply modifying it, directly modify the data structure of this triangulation. More...

const gp_Pnt &	Node (const Standard_Integer theIndex) const
	Returns node at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbNodes. More...

gp_Pnt &	ChangeNode (const Standard_Integer theIndex)
	Give access to the node at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbNodes. More...

const TColgp_Array1OfPnt2d &	UVNodes () const
	Returns the table of 2D nodes (2D points) associated with each 3D node of this triangulation. The function HasUVNodes checks if 2D nodes are associated with the 3D nodes of this triangulation. Const reference on the 2d nodes values. More...

TColgp_Array1OfPnt2d &	ChangeUVNodes ()
	Returns the table of 2D nodes (2D points) associated with each 3D node of this triangulation. Function ChangeUVNodes shares the returned array. Therefore if the table is selected by reference, you can, by simply modifying it, directly modify the data structure of this triangulation. More...

const gp_Pnt2d &	UVNode (const Standard_Integer theIndex) const
	Returns UVNode at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbNodes. More...

gp_Pnt2d &	ChangeUVNode (const Standard_Integer theIndex)
	Give access to the UVNode at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbNodes. More...

const Poly_Array1OfTriangle &	Triangles () const
	Returns the table of triangles for this triangulation. More...

Poly_Array1OfTriangle &	ChangeTriangles ()
	Returns the table of triangles for this triangulation. Function ChangeUVNodes shares the returned array. Therefore if the table is selected by reference, you can, by simply modifying it, directly modify the data structure of this triangulation. More...

const Poly_Triangle &	Triangle (const Standard_Integer theIndex) const
	Returns triangle at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbTriangles. More...

Poly_Triangle &	ChangeTriangle (const Standard_Integer theIndex)
	Give access to the triangle at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbTriangles. More...

void	SetNormals (const Handle< TShort_HArray1OfShortReal > &theNormals)
	Sets the table of node normals. raises exception if length of theNormals != 3*NbNodes. More...

const TShort_Array1OfShortReal &	Normals () const
	Returns the table of node normals. More...

TShort_Array1OfShortReal &	ChangeNormals ()
	Gives access to the table of node normals. More...

Standard_Boolean	HasNormals () const
	Returns Standard_True if nodal normals are defined. More...

gp_Dir	Normal (const Standard_Integer theIndex) const

void	SetNormal (const Standard_Integer theIndex, const gp_Dir &theNormal)
	Changes normal at the given index. Raises Standard_OutOfRange exception. 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 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_Transient *	This () 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
Standard_Real	myDeflection

TColgp_Array1OfPnt	myNodes

Handle< TColgp_HArray1OfPnt2d >	myUVNodes

Poly_Array1OfTriangle	myTriangles

Handle< TShort_HArray1OfShortReal >	myNormals

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

Provides a triangulation for a surface, a set of surfaces, or more generally a shape. A triangulation consists of an approximate representation of the actual shape, using a collection of points and triangles. The points are located on the surface. The edges of the triangles connect adjacent points with a straight line that approximates the true curve on the surface. A triangulation comprises:

A table of 3D nodes (3D points on the surface).
A table of triangles. Each triangle (Poly_Triangle object) comprises a triplet of indices in the table of 3D nodes specific to the triangulation.
A table of 2D nodes (2D points), parallel to the table of 3D nodes. This table is optional. If it exists, the coordinates of a 2D point are the (u, v) parameters of the corresponding 3D point on the surface approximated by the triangulation.
A deflection (optional), which maximizes the distance from a point on the surface to the corresponding point on its approximate triangulation. In many cases, algorithms do not need to work with the exact representation of a surface. A triangular representation induces simpler and more robust adjusting, faster performances, and the results are as good. This is a Transient class.

Constructor & Destructor Documentation

◆ Poly_Triangulation() [1/4]

Poly_Triangulation::Poly_Triangulation	(	const Standard_Integer	nbNodes,
		const Standard_Integer	nbTriangles,
		const Standard_Boolean	UVNodes
	)

Constructs a triangulation from a set of triangles. The triangulation is initialized without a triangle or a node, but capable of containing nbNodes nodes, and nbTriangles triangles. Here the UVNodes flag indicates whether 2D nodes will be associated with 3D ones, (i.e. to enable a 2D representation).

◆ Poly_Triangulation() [2/4]

Poly_Triangulation::Poly_Triangulation	(	const TColgp_Array1OfPnt &	Nodes,
		const Poly_Array1OfTriangle &	Triangles
	)

Constructs a triangulation from a set of triangles. The triangulation is initialized with 3D points from Nodes and triangles from Triangles.

◆ Poly_Triangulation() [3/4]

Poly_Triangulation::Poly_Triangulation	(	const TColgp_Array1OfPnt &	Nodes,
		const TColgp_Array1OfPnt2d &	UVNodes,
		const Poly_Array1OfTriangle &	Triangles
	)

Constructs a triangulation from a set of triangles. The triangulation is initialized with 3D points from Nodes, 2D points from UVNodes and triangles from Triangles, where coordinates of a 2D point from UVNodes are the (u, v) parameters of the corresponding 3D point from Nodes on the surface approximated by the constructed triangulation.

◆ Poly_Triangulation() [4/4]

Poly_Triangulation::Poly_Triangulation ( const Handle< Poly_Triangulation > & theTriangulation )

Copy constructor for triangulation.

Member Function Documentation

◆ ChangeNode()

gp_Pnt& Poly_Triangulation::ChangeNode ( const Standard_Integer theIndex )

Give access to the node at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbNodes.

◆ ChangeNodes()

TColgp_Array1OfPnt& Poly_Triangulation::ChangeNodes ( )

inline

Returns the table of 3D nodes (3D points) for this triangulation. The returned array is shared. Therefore if the table is selected by reference, you can, by simply modifying it, directly modify the data structure of this triangulation.

◆ ChangeNormals()

TShort_Array1OfShortReal& Poly_Triangulation::ChangeNormals ( )

Gives access to the table of node normals.

◆ ChangeTriangle()

Poly_Triangle& Poly_Triangulation::ChangeTriangle ( const Standard_Integer theIndex )

Give access to the triangle at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbTriangles.

◆ ChangeTriangles()

Poly_Array1OfTriangle& Poly_Triangulation::ChangeTriangles ( )

inline

Returns the table of triangles for this triangulation. Function ChangeUVNodes shares the returned array. Therefore if the table is selected by reference, you can, by simply modifying it, directly modify the data structure of this triangulation.

◆ ChangeUVNode()

gp_Pnt2d& Poly_Triangulation::ChangeUVNode ( const Standard_Integer theIndex )

Give access to the UVNode at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbNodes.

◆ ChangeUVNodes()

TColgp_Array1OfPnt2d& Poly_Triangulation::ChangeUVNodes ( )

inline

Returns the table of 2D nodes (2D points) associated with each 3D node of this triangulation. Function ChangeUVNodes shares the returned array. Therefore if the table is selected by reference, you can, by simply modifying it, directly modify the data structure of this triangulation.

◆ Copy()

virtual Handle< Poly_Triangulation > Poly_Triangulation::Copy ( ) const

virtual

Creates full copy of current triangulation.

◆ Deflection() [1/2]

Standard_Real Poly_Triangulation::Deflection ( ) const

inline

Returns the deflection of this triangulation.

◆ Deflection() [2/2]

void Poly_Triangulation::Deflection ( const Standard_Real theDeflection )

Sets the deflection of this triangulation to theDeflection. See more on deflection in Polygon2D.

◆ HasNormals()

Standard_Boolean Poly_Triangulation::HasNormals ( ) const

Returns Standard_True if nodal normals are defined.

◆ HasUVNodes()

Standard_Boolean Poly_Triangulation::HasUVNodes ( ) const

inline

Returns Standard_True if 2D nodes are associated with 3D nodes for this triangulation.

◆ NbNodes()

Standard_Integer Poly_Triangulation::NbNodes ( ) const

inline

Returns the number of nodes for this triangulation.

◆ NbTriangles()

Standard_Integer Poly_Triangulation::NbTriangles ( ) const

inline

Returns the number of triangles for this triangulation.

◆ Node()

const gp_Pnt& Poly_Triangulation::Node ( const Standard_Integer theIndex ) const

Returns node at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbNodes.

◆ Nodes()

const TColgp_Array1OfPnt& Poly_Triangulation::Nodes ( ) const

inline

Returns the table of 3D nodes (3D points) for this triangulation.

◆ Normal()

gp_Dir Poly_Triangulation::Normal ( const Standard_Integer theIndex ) const

Returns: normal at the given index. Raises Standard_OutOfRange exception.

◆ Normals()

const TShort_Array1OfShortReal& Poly_Triangulation::Normals ( ) const

Returns the table of node normals.

◆ RemoveUVNodes()

void Poly_Triangulation::RemoveUVNodes ( )

Deallocates the UV nodes.

◆ SetNormal()

void Poly_Triangulation::SetNormal	(	const Standard_Integer	theIndex,
		const gp_Dir &	theNormal
	)

Changes normal at the given index. Raises Standard_OutOfRange exception.

◆ SetNormals()

void Poly_Triangulation::SetNormals ( const Handle< TShort_HArray1OfShortReal > & theNormals )

Sets the table of node normals. raises exception if length of theNormals != 3*NbNodes.

◆ Triangle()

const Poly_Triangle& Poly_Triangulation::Triangle ( const Standard_Integer theIndex ) const

Returns triangle at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbTriangles.

◆ Triangles()

const Poly_Array1OfTriangle& Poly_Triangulation::Triangles ( ) const

inline

Returns the table of triangles for this triangulation.

◆ UVNode()

const gp_Pnt2d& Poly_Triangulation::UVNode ( const Standard_Integer theIndex ) const

Returns UVNode at the given index. Raises Standard_OutOfRange exception if theIndex is less than 1 or greater than NbNodes.

◆ UVNodes()

const TColgp_Array1OfPnt2d& Poly_Triangulation::UVNodes ( ) const

inline

Returns the table of 2D nodes (2D points) associated with each 3D node of this triangulation. The function HasUVNodes checks if 2D nodes are associated with the 3D nodes of this triangulation. Const reference on the 2d nodes values.

Field Documentation

◆ myDeflection

Standard_Real Poly_Triangulation::myDeflection

protected

◆ myNodes

TColgp_Array1OfPnt Poly_Triangulation::myNodes

protected

◆ myNormals

Handle< TShort_HArray1OfShortReal > Poly_Triangulation::myNormals

protected

◆ myTriangles

Poly_Array1OfTriangle Poly_Triangulation::myTriangles

protected

◆ myUVNodes

Handle< TColgp_HArray1OfPnt2d > Poly_Triangulation::myUVNodes

protected

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

Poly_Triangulation.hxx

Poly_Triangulation Class Reference

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Poly_Triangulation() [1/4]

◆ Poly_Triangulation() [2/4]

◆ Poly_Triangulation() [3/4]

◆ Poly_Triangulation() [4/4]

Member Function Documentation

◆ ChangeNode()

◆ ChangeNodes()

◆ ChangeNormals()

◆ ChangeTriangle()

◆ ChangeTriangles()

◆ ChangeUVNode()

◆ ChangeUVNodes()

◆ Copy()

◆ Deflection() [1/2]

◆ Deflection() [2/2]

◆ HasNormals()

◆ HasUVNodes()

◆ NbNodes()

◆ NbTriangles()

◆ Node()

◆ Nodes()

◆ Normal()

◆ Normals()

◆ RemoveUVNodes()

◆ SetNormal()

◆ SetNormals()

◆ Triangle()

◆ Triangles()

◆ UVNode()

◆ UVNodes()

Field Documentation

◆ myDeflection

◆ myNodes

◆ myNormals

◆ myTriangles

◆ myUVNodes