Tool class accumulating common geometrical functions as well as functionality using shape geometry to produce data necessary for tessellation. General aim is to calculate discretization points for the given curve or iso curve of surface according to the specified parameters. More...

#include <BRepMesh_GeomTool.hxx>

Public Types
enum	IntFlag { NoIntersection , Cross , EndPointTouch , PointOnSegment , Glued , Same }
	Enumerates states of segments intersection check. More...

Public Member Functions
	BRepMesh_GeomTool (const BRepAdaptor_Curve &theCurve, const Standard_Real theFirstParam, const Standard_Real theLastParam, const Standard_Real theLinDeflection, const Standard_Real theAngDeflection, const Standard_Integer theMinPointsNb=2, const Standard_Real theMinSize=Precision::Confusion())
	Constructor. Initiates discretization of the given geometric curve.

	BRepMesh_GeomTool (const Handle< BRepAdaptor_Surface > &theSurface, const GeomAbs_IsoType theIsoType, const Standard_Real theParamIso, const Standard_Real theFirstParam, const Standard_Real theLastParam, const Standard_Real theLinDeflection, const Standard_Real theAngDeflection, const Standard_Integer theMinPointsNb=2, const Standard_Real theMinSize=Precision::Confusion())
	Constructor. Initiates discretization of geometric curve corresponding to iso curve of the given surface.

Standard_Integer	AddPoint (const gp_Pnt &thePoint, const Standard_Real theParam, const Standard_Boolean theIsReplace=Standard_True)
	Adds point to already calculated points (or replaces existing).

Standard_Integer	NbPoints () const
	Returns number of discretization points.

Standard_Boolean	Value (const Standard_Integer theIndex, const Standard_Real theIsoParam, Standard_Real &theParam, gp_Pnt &thePoint, gp_Pnt2d &theUV) const
	Gets parameters of discretization point with the given index.

Standard_Boolean	Value (const Standard_Integer theIndex, const Handle< BRepAdaptor_Surface > &theSurface, Standard_Real &theParam, gp_Pnt &thePoint, gp_Pnt2d &theUV) const
	Gets parameters of discretization point with the given index.

static API
static Standard_Boolean	Normal (const Handle< BRepAdaptor_Surface > &theSurface, const Standard_Real theParamU, const Standard_Real theParamV, gp_Pnt &thePoint, gp_Dir &theNormal)
	Computes normal to the given surface at the specified position in parametric space.

static IntFlag	IntLinLin (const gp_XY &theStartPnt1, const gp_XY &theEndPnt1, const gp_XY &theStartPnt2, const gp_XY &theEndPnt2, gp_XY &theIntPnt, Standard_Real(&theParamOnSegment)[2])
	Checks intersection between two lines defined by two points.

static IntFlag	IntSegSeg (const gp_XY &theStartPnt1, const gp_XY &theEndPnt1, const gp_XY &theStartPnt2, const gp_XY &theEndPnt2, const Standard_Boolean isConsiderEndPointTouch, const Standard_Boolean isConsiderPointOnSegment, gp_Pnt2d &theIntPnt)
	Checks intersection between the two segments. Checks that intersection point lies within ranges of both segments.

static Standard_Real	SquareDeflectionOfSegment (const gp_Pnt &theFirstPoint, const gp_Pnt &theLastPoint, const gp_Pnt &theMidPoint)
	Compute deflection of the given segment.

static std::pair< Standard_Integer, Standard_Integer >	CellsCount (const Handle< Adaptor3d_Surface > &theSurface, const Standard_Integer theVerticesNb, const Standard_Real theDeflection, const BRepMesh_DefaultRangeSplitter *theRangeSplitter)
	Computes normal to the given surface at the specified position in parametric space.

Detailed Description

Tool class accumulating common geometrical functions as well as functionality using shape geometry to produce data necessary for tessellation. General aim is to calculate discretization points for the given curve or iso curve of surface according to the specified parameters.

Member Enumeration Documentation

◆ IntFlag

enum BRepMesh_GeomTool::IntFlag

Enumerates states of segments intersection check.

Enumerator
NoIntersection
Cross
EndPointTouch
PointOnSegment
Glued
Same

Constructor & Destructor Documentation

◆ BRepMesh_GeomTool() [1/2]

BRepMesh_GeomTool::BRepMesh_GeomTool	(	const BRepAdaptor_Curve &	theCurve,
		const Standard_Real	theFirstParam,
		const Standard_Real	theLastParam,
		const Standard_Real	theLinDeflection,
		const Standard_Real	theAngDeflection,
		const Standard_Integer	theMinPointsNb = `2`,
		const Standard_Real	theMinSize = `Precision::Confusion()`
	)

Constructor. Initiates discretization of the given geometric curve.

Parameters

theCurve	curve to be discretized.
theFirstParam	first parameter of the curve.
theLastParam	last parameter of the curve.
theLinDeflection	linear deflection.
theAngDeflection	angular deflection.
theMinPointsNb	minimum number of points to be produced.

◆ BRepMesh_GeomTool() [2/2]

BRepMesh_GeomTool::BRepMesh_GeomTool	(	const Handle< BRepAdaptor_Surface > &	theSurface,
		const GeomAbs_IsoType	theIsoType,
		const Standard_Real	theParamIso,
		const Standard_Real	theFirstParam,
		const Standard_Real	theLastParam,
		const Standard_Real	theLinDeflection,
		const Standard_Real	theAngDeflection,
		const Standard_Integer	theMinPointsNb = `2`,
		const Standard_Real	theMinSize = `Precision::Confusion()`
	)

Constructor. Initiates discretization of geometric curve corresponding to iso curve of the given surface.

Parameters

theSurface	surface the iso curve to be taken from.
theIsoType	type of iso curve to be used, U or V.
theParamIso	parameter on the surface specifying the iso curve.
theFirstParam	first parameter of the curve.
theLastParam	last parameter of the curve.
theLinDeflection	linear deflection.
theAngDeflection	angular deflection.
theMinPointsNb	minimum number of points to be produced.

Member Function Documentation

◆ AddPoint()

Standard_Integer BRepMesh_GeomTool::AddPoint	(	const gp_Pnt &	thePoint,
		const Standard_Real	theParam,
		const Standard_Boolean	theIsReplace = `Standard_True`
	)

inline

Adds point to already calculated points (or replaces existing).

Parameters

thePoint	point to be added.
theParam	parameter on the curve corresponding to the given point.
theIsReplace	if TRUE replaces existing point lying within parameteric tolerance of the given point.

Returns: index of new added point or found with parametric tolerance

◆ CellsCount()

static std::pair< Standard_Integer, Standard_Integer > BRepMesh_GeomTool::CellsCount	(	const Handle< Adaptor3d_Surface > &	theSurface,
		const Standard_Integer	theVerticesNb,
		const Standard_Real	theDeflection,
		const BRepMesh_DefaultRangeSplitter *	theRangeSplitter
	)

static

Computes normal to the given surface at the specified position in parametric space.

Parameters

	theSurface	surface the normal should be found for.
	theParamU	U parameter in parametric space of the surface.
	theParamV	V parameter in parametric space of the surface.
[out]	thePoint	3d point corresponding to the given parameters.
[out]	theNormal	normal vector at the point specified by the parameters.

Returns: FALSE if the normal can not be computed, TRUE elsewhere.

◆ IntLinLin()

static IntFlag BRepMesh_GeomTool::IntLinLin	(	const gp_XY &	theStartPnt1,
		const gp_XY &	theEndPnt1,
		const gp_XY &	theStartPnt2,
		const gp_XY &	theEndPnt2,
		gp_XY &	theIntPnt,
		Standard_Real(&)	theParamOnSegment[2]
	)

static

Checks intersection between two lines defined by two points.

Parameters

	theStartPnt1	start point of first line.
	theEndPnt1	end point of first line.
	theStartPnt2	start point of second line.
	theEndPnt2	end point of second line.
[out]	theIntPnt	point of intersection.
[out]	theParamOnSegment	parameters of intersection point corresponding to first and second segment.

Returns: status of intersection check.

◆ IntSegSeg()

static IntFlag BRepMesh_GeomTool::IntSegSeg	(	const gp_XY &	theStartPnt1,
		const gp_XY &	theEndPnt1,
		const gp_XY &	theStartPnt2,
		const gp_XY &	theEndPnt2,
		const Standard_Boolean	isConsiderEndPointTouch,
		const Standard_Boolean	isConsiderPointOnSegment,
		gp_Pnt2d &	theIntPnt
	)

static

Checks intersection between the two segments. Checks that intersection point lies within ranges of both segments.

Parameters

	theStartPnt1	start point of first segment.
	theEndPnt1	end point of first segment.
	theStartPnt2	start point of second segment.
	theEndPnt2	end point of second segment.
	isConsiderEndPointTouch	if TRUE EndPointTouch status will be returned in case if segments are touching by end points, if FALSE returns NoIntersection flag.
	isConsiderPointOnSegment	if TRUE PointOnSegment status will be returned in case if end point of one segment lies onto another one, if FALSE returns NoIntersection flag.
[out]	theIntPnt	point of intersection.

Returns: status of intersection check.

◆ NbPoints()

Standard_Integer BRepMesh_GeomTool::NbPoints ( ) const

inline

Returns number of discretization points.

◆ Normal()

static Standard_Boolean BRepMesh_GeomTool::Normal	(	const Handle< BRepAdaptor_Surface > &	theSurface,
		const Standard_Real	theParamU,
		const Standard_Real	theParamV,
		gp_Pnt &	thePoint,
		gp_Dir &	theNormal
	)

static

Computes normal to the given surface at the specified position in parametric space.

Parameters

	theSurface	surface the normal should be found for.
	theParamU	U parameter in parametric space of the surface.
	theParamV	V parameter in parametric space of the surface.
[out]	thePoint	3d point corresponding to the given parameters.
[out]	theNormal	normal vector at the point specified by the parameters.

Returns: FALSE if the normal can not be computed, TRUE elsewhere.

◆ SquareDeflectionOfSegment()

static Standard_Real BRepMesh_GeomTool::SquareDeflectionOfSegment	(	const gp_Pnt &	theFirstPoint,
		const gp_Pnt &	theLastPoint,
		const gp_Pnt &	theMidPoint
	)

inlinestatic

Compute deflection of the given segment.

◆ Value() [1/2]

Standard_Boolean BRepMesh_GeomTool::Value	(	const Standard_Integer	theIndex,
		const Handle< BRepAdaptor_Surface > &	theSurface,
		Standard_Real &	theParam,
		gp_Pnt &	thePoint,
		gp_Pnt2d &	theUV
	)		const

Gets parameters of discretization point with the given index.

Parameters

theIndex	index of discretization point.
theSurface	surface the curve is lying onto.
theParam[out]	parameter of the point on the curve.
thePoint[out]	discretization point.
theUV[out]	discretization point in parametric space of the surface.

Returns: TRUE on success, FALSE elsewhere.

◆ Value() [2/2]

Standard_Boolean BRepMesh_GeomTool::Value	(	const Standard_Integer	theIndex,
		const Standard_Real	theIsoParam,
		Standard_Real &	theParam,
		gp_Pnt &	thePoint,
		gp_Pnt2d &	theUV
	)		const

Gets parameters of discretization point with the given index.

Parameters

theIndex	index of discretization point.
theIsoParam	parameter on surface to be used as second coordinate of resulting 2d point.
theParam[out]	parameter of the point on the iso curve.
thePoint[out]	discretization point.
theUV[out]	discretization point in parametric space of the surface.

Returns: TRUE on success, FALSE elsewhere.

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

BRepMesh_GeomTool.hxx

Public Types

Public Member Functions

static API

Detailed Description

Member Enumeration Documentation

◆ IntFlag

Constructor & Destructor Documentation

◆ BRepMesh_GeomTool() [1/2]

◆ BRepMesh_GeomTool() [2/2]

Member Function Documentation

◆ AddPoint()

◆ CellsCount()

◆ IntLinLin()

◆ IntSegSeg()

◆ NbPoints()

◆ Normal()

◆ SquareDeflectionOfSegment()

◆ Value() [1/2]

◆ Value() [2/2]