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 double theFirstParam, const double theLastParam, const double theLinDeflection, const double theAngDeflection, const int theMinPointsNb=2, const double theMinSize=Precision::Confusion())
	Constructor. Initiates discretization of the given geometric curve.
	BRepMesh_GeomTool (const occ::handle< BRepAdaptor_Surface > &theSurface, const GeomAbs_IsoType theIsoType, const double theParamIso, const double theFirstParam, const double theLastParam, const double theLinDeflection, const double theAngDeflection, const int theMinPointsNb=2, const double theMinSize=Precision::Confusion())
	Constructor. Initiates discretization of geometric curve corresponding to iso curve of the given surface.
int	AddPoint (const gp_Pnt &thePoint, const double theParam, const bool theIsReplace=true)
	Adds point to already calculated points (or replaces existing).
int	NbPoints () const
	Returns number of discretization points.
bool	Value (const int theIndex, const double theIsoParam, double &theParam, gp_Pnt &thePoint, gp_Pnt2d &theUV) const
	Gets parameters of discretization point with the given index.
bool	Value (const int theIndex, const occ::handle< BRepAdaptor_Surface > &theSurface, double &theParam, gp_Pnt &thePoint, gp_Pnt2d &theUV) const
	Gets parameters of discretization point with the given index.

static API

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.

static bool Normal (const occ::handle< BRepAdaptor_Surface > &theSurface, const double theParamU, const double theParamV, gp_Pnt &thePoint, gp_Dir &theNormal)

Checks intersection between two lines defined by two points.

static IntFlag IntLinLin (const gp_XY &theStartPnt1, const gp_XY &theEndPnt1, const gp_XY &theStartPnt2, const gp_XY &theEndPnt2, gp_XY &theIntPnt, double(&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 bool isConsiderEndPointTouch, const bool isConsiderPointOnSegment, gp_Pnt2d &theIntPnt)

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

static double SquareDeflectionOfSegment (const gp_Pnt &theFirstPoint, const gp_Pnt &theLastPoint, const gp_Pnt &theMidPoint)

Compute deflection of the given segment.

static std::pair< int, int > CellsCount (const occ::handle< Adaptor3d_Surface > &theSurface, const int theVerticesNb, const double theDeflection, const BRepMesh_DefaultRangeSplitter *theRangeSplitter)

Checks intersection between two lines defined by two points.

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 double	theFirstParam,
		const double	theLastParam,
		const double	theLinDeflection,
		const double	theAngDeflection,
		const int	theMinPointsNb = 2,
		const double	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 occ::handle< BRepAdaptor_Surface > &	theSurface,
		const GeomAbs_IsoType	theIsoType,
		const double	theParamIso,
		const double	theFirstParam,
		const double	theLastParam,
		const double	theLinDeflection,
		const double	theAngDeflection,
		const int	theMinPointsNb = 2,
		const double	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()

int BRepMesh_GeomTool::AddPoint	(	const gp_Pnt &	thePoint,
		const double	theParam,
		const bool	theIsReplace = 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 parametric tolerance of the given point.

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

◆ CellsCount()

std::pair< int, int > BRepMesh_GeomTool::CellsCount	(	const occ::handle< Adaptor3d_Surface > &	theSurface,
		const int	theVerticesNb,
		const double	theDeflection,
		const BRepMesh_DefaultRangeSplitter *	theRangeSplitter )

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.

◆ IntLinLin()

IntFlag BRepMesh_GeomTool::IntLinLin	(	const gp_XY &	theStartPnt1,
		const gp_XY &	theEndPnt1,
		const gp_XY &	theStartPnt2,
		const gp_XY &	theEndPnt2,
		gp_XY &	theIntPnt,
		double(&)	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()

IntFlag BRepMesh_GeomTool::IntSegSeg	(	const gp_XY &	theStartPnt1,
		const gp_XY &	theEndPnt1,
		const gp_XY &	theStartPnt2,
		const gp_XY &	theEndPnt2,
		const bool	isConsiderEndPointTouch,
		const bool	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()

int BRepMesh_GeomTool::NbPoints ( ) const

inline

Returns number of discretization points.

◆ Normal()

bool BRepMesh_GeomTool::Normal	(	const occ::handle< BRepAdaptor_Surface > &	theSurface,
		const double	theParamU,
		const double	theParamV,
		gp_Pnt &	thePoint,
		gp_Dir &	theNormal )

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.

◆ SquareDeflectionOfSegment()

double 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]

bool BRepMesh_GeomTool::Value	(	const int	theIndex,
		const double	theIsoParam,
		double &	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.
[out]	theParam	parameter of the point on the iso curve.
[out]	thePoint	discretization point.
[out]	theUV	discretization point in parametric space of the surface.

Returns: TRUE on success, FALSE elsewhere.

◆ Value() [2/2]

bool BRepMesh_GeomTool::Value	(	const int	theIndex,
		const occ::handle< BRepAdaptor_Surface > &	theSurface,
		double &	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.
[out]	theParam	parameter of the point on the curve.
[out]	thePoint	discretization point.
[out]	theUV	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]