Public 成员函数
	GDir2d ()

	GDir2d (GVec2d theV)

	GDir2d (GXY theCoord)

	GDir2d (double theXv, double theYv)

void	SetCoord (int theIndex, double theXi)

void	SetCoord (double theXv, double theYv)

void	SetX (double theX)

void	SetY (double theY)

void	SetXY (GXY theCoord)

double	Coord (int theIndex)

void	Coord (double[] theXv, double[] theYv)

double	X ()

double	Y ()

GXY	XY ()

boolean	IsEqual (GDir2d theOther, double theAngularTolerance)

boolean	IsNormal (GDir2d theOther, double theAngularTolerance)

boolean	IsOpposite (GDir2d theOther, double theAngularTolerance)

boolean	IsParallel (GDir2d theOther, double theAngularTolerance)

double	Angle (GDir2d theOther)

double	Crossed (GDir2d theRight)

double	Dot (GDir2d theOther)

void	Reverse ()

GDir2d	Reversed ()

void	Mirror (GDir2d theV)

GDir2d	Mirrored (GDir2d theV)

void	Mirror (GAx2d theA)

GDir2d	Mirrored (GAx2d theA)

void	Rotate (double Ang)

GDir2d	Rotated (double theAng)

void	Transform (GTrsf2d theT)

GDir2d	Transformed (GTrsf2d theT)

详细描述

Describes a unit vector in the plane (2D space). This unit vector is also called "Direction". See Also gce_MakeDir2d which provides functions for more complex unit vector constructions Geom2d_Direction which provides additional functions for constructing unit vectors and works, in particular, with the parametric equations of unit vectors

构造及析构函数说明

◆ GDir2d() [1/4]

GDir2d.GDir2d ( )

Creates a direction corresponding to X axis.

◆ GDir2d() [2/4]

GDir2d.GDir2d ( GVec2d theV )

Normalizes the vector theV and creates a Direction. Raises ConstructionError if theV.Magnitude() <= Resolution from gp.

◆ GDir2d() [3/4]

GDir2d.GDir2d ( GXY theCoord )

Creates a Direction from a doublet of coordinates. Raises ConstructionError if theCoord.Modulus() <= Resolution from gp.

◆ GDir2d() [4/4]

GDir2d.GDir2d	(	double	theXv,
		double	theYv
	)

Creates a Direction with its 2 cartesian coordinates. Raises ConstructionError if Sqrt(theXv*theXv + theYv*theYv) <= Resolution from gp.

成员函数说明

◆ Angle()

double GDir2d.Angle ( GDir2d theOther )

Computes the angular value in radians between <me> and <theOther>. Returns the angle in the range [-PI, PI].

◆ Coord() [1/2]

void GDir2d.Coord	(	double[]	theXv,
		double[]	theYv
	)

For this unit vector returns its two coordinates theXv and theYv. Raises OutOfRange if theIndex != {1, 2}.

◆ Coord() [2/2]

double GDir2d.Coord ( int theIndex )

For this unit vector returns the coordinate of range theIndex : theIndex = 1 => X is returned theIndex = 2 => Y is returned Raises OutOfRange if theIndex != {1, 2}.

◆ Crossed()

double GDir2d.Crossed ( GDir2d theRight )

Computes the cross product between two directions.

◆ Dot()

double GDir2d.Dot ( GDir2d theOther )

Computes the scalar product

◆ IsEqual()

boolean GDir2d.IsEqual	(	GDir2d	theOther,
		double	theAngularTolerance
	)

Returns True if the two vectors have the same direction i.e. the angle between this unit vector and the unit vector theOther is less than or equal to theAngularTolerance.

◆ IsNormal()

boolean GDir2d.IsNormal	(	GDir2d	theOther,
		double	theAngularTolerance
	)

Returns True if the angle between this unit vector and the unit vector theOther is equal to Pi/2 or -Pi/2 (normal) i.e. Abs(Abs(<me>.Angle(theOther)) - PI/2.) <= theAngularTolerance

◆ IsOpposite()

boolean GDir2d.IsOpposite	(	GDir2d	theOther,
		double	theAngularTolerance
	)

Returns True if the angle between this unit vector and the unit vector theOther is equal to Pi or -Pi (opposite). i.e. PI - Abs(<me>.Angle(theOther)) <= theAngularTolerance

◆ IsParallel()

boolean GDir2d.IsParallel	(	GDir2d	theOther,
		double	theAngularTolerance
	)

returns true if the angle between this unit vector and unit vector theOther is equal to 0, Pi or -Pi. i.e. Abs(Angle(<me>, theOther)) <= theAngularTolerance or PI - Abs(Angle(<me>, theOther)) <= theAngularTolerance

◆ Mirrored() [1/2]

GDir2d GDir2d.Mirrored ( GAx2d theA )

Performs the symmetrical transformation of a direction with respect to an axis placement which is the axis of the symmetry.

◆ Mirrored() [2/2]

GDir2d GDir2d.Mirrored ( GDir2d theV )

Performs the symmetrical transformation of a direction with respect to the direction theV which is the center of the symmetry.

◆ Reversed()

GDir2d GDir2d.Reversed ( )

Reverses the orientation of a direction

◆ Rotated()

GDir2d GDir2d.Rotated ( double theAng )

Rotates a direction. theAng is the angular value of the rotation in radians.

◆ SetCoord() [1/2]

void GDir2d.SetCoord	(	double	theXv,
		double	theYv
	)

For this unit vector, assigns: - the values theXv and theYv to its two coordinates, Warning Remember that all the coordinates of a unit vector are implicitly modified when any single one is changed directly. Exceptions Standard_OutOfRange if theIndex is not 1 or 2. Standard_ConstructionError if either of the following is less than or equal to gp::Resolution(): - Sqrt(theXv*theXv + theYv*theYv), or - the modulus of the number pair formed by the new value Xi and the other coordinate of this vector that was not directly modified. Raises OutOfRange if theIndex != {1, 2}.

◆ SetCoord() [2/2]

void GDir2d.SetCoord	(	int	theIndex,
		double	theXi
	)

For this unit vector, assigns: the value theXi to: - the X coordinate if theIndex is 1, or - the Y coordinate if theIndex is 2, and then normalizes it. Warning Remember that all the coordinates of a unit vector are implicitly modified when any single one is changed directly. Exceptions Standard_OutOfRange if theIndex is not 1 or 2. Standard_ConstructionError if either of the following is less than or equal to gp::Resolution(): - Sqrt(theXv*theXv + theYv*theYv), or - the modulus of the number pair formed by the new value theXi and the other coordinate of this vector that was not directly modified. Raises OutOfRange if theIndex != {1, 2}.

◆ SetX()

void GDir2d.SetX ( double theX )

Assigns the given value to the X coordinate of this unit vector, and then normalizes it. Warning Remember that all the coordinates of a unit vector are implicitly modified when any single one is changed directly. Exceptions Standard_ConstructionError if either of the following is less than or equal to gp::Resolution(): - the modulus of Coord, or - the modulus of the number pair formed from the new X or Y coordinate and the other coordinate of this vector that was not directly modified.

◆ SetXY()

void GDir2d.SetXY ( GXY theCoord )

Assigns: - the two coordinates of theCoord to this unit vector, and then normalizes it. Warning Remember that all the coordinates of a unit vector are implicitly modified when any single one is changed directly. Exceptions Standard_ConstructionError if either of the following is less than or equal to gp::Resolution(): - the modulus of theCoord, or - the modulus of the number pair formed from the new X or Y coordinate and the other coordinate of this vector that was not directly modified.

◆ SetY()

void GDir2d.SetY ( double theY )

Assigns the given value to the Y coordinate of this unit vector, and then normalizes it. Warning Remember that all the coordinates of a unit vector are implicitly modified when any single one is changed directly. Exceptions Standard_ConstructionError if either of the following is less than or equal to gp::Resolution(): - the modulus of Coord, or - the modulus of the number pair formed from the new X or Y coordinate and the other coordinate of this vector that was not directly modified.

◆ Transformed()

GDir2d GDir2d.Transformed ( GTrsf2d theT )

Transforms a direction with the "Trsf" theT. Warnings : If the scale factor of the "Trsf" theT is negative then the direction <me> is reversed.

◆ X()

double GDir2d.X ( )

For this unit vector, returns its X coordinate.

◆ XY()

GXY GDir2d.XY ( )

For this unit vector, returns its two coordinates as a number pair. Comparison between Directions The precision value is an input data.

◆ Y()

double GDir2d.Y ( )

For this unit vector, returns its Y coordinate.

Public 成员函数