Public 成员函数
	GAx2d ()

	GAx2d (GPnt2d theP, GDir2d theV)

void	SetLocation (GPnt2d theP)

void	SetDirection (GDir2d theV)

GPnt2d	Location ()

GDir2d	Direction ()

boolean	IsCoaxial (GAx2d Other, double AngularTolerance, double LinearTolerance)

boolean	IsNormal (GAx2d theOther, double theAngularTolerance)

boolean	IsOpposite (GAx2d theOther, double theAngularTolerance)

boolean	IsParallel (GAx2d theOther, double theAngularTolerance)

double	Angle (GAx2d theOther)

void	Reverse ()

GAx2d	Reversed ()

void	Mirror (GPnt2d P)

GAx2d	Mirrored (GPnt2d P)

void	Mirror (GAx2d A)

GAx2d	Mirrored (GAx2d A)

void	Rotate (GPnt2d theP, double theAng)

GAx2d	Rotated (GPnt2d theP, double theAng)

void	Scale (GPnt2d P, double S)

GAx2d	Scaled (GPnt2d theP, double theS)

void	Transform (GTrsf2d theT)

GAx2d	Transformed (GTrsf2d theT)

void	Translate (GVec2d theV)

GAx2d	Translated (GVec2d theV)

void	Translate (GPnt2d theP1, GPnt2d theP2)

GAx2d	Translated (GPnt2d theP1, GPnt2d theP2)

详细描述

Describes an axis in the plane (2D space). An axis is defined by: - its origin (also referred to as its "Location point"), and - its unit vector (referred to as its "Direction"). An axis implicitly defines a direct, right-handed coordinate system in 2D space by: - its origin, - its "Direction" (giving the "X Direction" of the coordinate system), and - the unit vector normal to "Direction" (positive angle measured in the trigonometric sense). An axis is used: - to describe 2D geometric entities (for example, the axis which defines angular coordinates on a circle). It serves for the same purpose as the STEP function "axis placement one axis", or - to define geometric transformations (axis of symmetry, axis of rotation, and so on). Note: to define a left-handed 2D coordinate system, use gp_Ax22d.

构造及析构函数说明

◆ GAx2d() [1/2]

GAx2d.GAx2d ( )

Creates an axis object representing X axis of the reference co-ordinate system.

◆ GAx2d() [2/2]

GAx2d.GAx2d	(	GPnt2d	theP,
		GDir2d	theV )

Creates an Ax2d. <theP> is the "Location" point of the axis placement and theV is the "Direction" of the axis placement.

成员函数说明

◆ Angle()

double GAx2d.Angle ( GAx2d theOther )

Computes the angle, in radians, between this axis and the axis theOther. The value of the angle is between -Pi and Pi.

◆ Direction()

GDir2d GAx2d.Direction ( )

Returns the direction of <me>.

◆ IsCoaxial()

boolean GAx2d.IsCoaxial	(	GAx2d	Other,
		double	AngularTolerance,
		double	LinearTolerance )

Returns True if : . the angle between <me> and <Other> is lower or equal to <AngularTolerance> and . the distance between <me>.Location() and <Other> is lower or equal to <LinearTolerance> and . the distance between <Other>.Location() and <me> is lower or equal to LinearTolerance.

◆ IsNormal()

boolean GAx2d.IsNormal	(	GAx2d	theOther,
		double	theAngularTolerance )

Returns true if this axis and the axis theOther are normal to each other. That is, if the angle between the two axes is equal to Pi/2 or -Pi/2. Note: the tolerance criterion is given by theAngularTolerance.

◆ IsOpposite()

boolean GAx2d.IsOpposite	(	GAx2d	theOther,
		double	theAngularTolerance )

Returns true if this axis and the axis theOther are parallel, and have opposite orientations. That is, if the angle between the two axes is equal to Pi or -Pi. Note: the tolerance criterion is given by theAngularTolerance.

◆ IsParallel()

boolean GAx2d.IsParallel	(	GAx2d	theOther,
		double	theAngularTolerance )

Returns true if this axis and the axis theOther are parallel, and have either the same or opposite orientations. That is, if the angle between the two axes is equal to 0, Pi or -Pi. Note: the tolerance criterion is given by theAngularTolerance.

◆ Location()

GPnt2d GAx2d.Location ( )

Returns the origin of <me>.

◆ Mirrored() [1/2]

GAx2d GAx2d.Mirrored ( GAx2d A )

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

◆ Mirrored() [2/2]

GAx2d GAx2d.Mirrored ( GPnt2d P )

Performs the symmetrical transformation of an axis placement with respect to the point P which is the center of the symmetry.

◆ Reverse()

void GAx2d.Reverse ( )

Reverses the direction of <me> and assigns the result to this axis.

◆ Reversed()

GAx2d GAx2d.Reversed ( )

Computes a new axis placement with a direction opposite to the direction of <me>.

◆ Rotated()

GAx2d GAx2d.Rotated	(	GPnt2d	theP,
		double	theAng )

Rotates an axis placement. <theP> is the center of the rotation. theAng is the angular value of the rotation in radians.

◆ Scaled()

GAx2d GAx2d.Scaled	(	GPnt2d	theP,
		double	theS )

Applies a scaling transformation on the axis placement. The "Location" point of the axisplacement is modified. The "Direction" is reversed if the scale is negative.

◆ SetDirection()

void GAx2d.SetDirection ( GDir2d theV )

Changes the direction of <me>.

◆ SetLocation()

void GAx2d.SetLocation ( GPnt2d theP )

Changes the "Location" point (origin) of <me>.

◆ Transformed()

GAx2d GAx2d.Transformed ( GTrsf2d theT )

Transforms an axis placement with a Trsf.

◆ Translated() [1/2]

GAx2d GAx2d.Translated	(	GPnt2d	theP1,
		GPnt2d	theP2 )

Translates an axis placement from the point theP1 to the point theP2.

◆ Translated() [2/2]

GAx2d GAx2d.Translated ( GVec2d theV )

Translates an axis placement in the direction of the vector theV. The magnitude of the translation is the vector's magnitude.

Public 成员函数