AnyCAD Rapid SDK  2021
The Rapid CAD SDK
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GParab2d Class Reference

Public Member Functions

synchronized void delete ()
 
 GParab2d ()
 
 GParab2d (GAx2d theMirrorAxis, double theFocalLength, boolean theSense)
 
 GParab2d (GAx2d theMirrorAxis, double theFocalLength)
 
 GParab2d (GAx22d theAxes, double theFocalLength)
 
 GParab2d (GAx2d theDirectrix, GPnt2d theFocus, boolean theSense)
 
 GParab2d (GAx2d theDirectrix, GPnt2d theFocus)
 
void SetFocal (double Focal)
 
void SetLocation (GPnt2d P)
 
void SetMirrorAxis (GAx2d A)
 
void SetAxis (GAx22d A)
 
void Coefficients (double[] A, double[] B, double[] C, double[] D, double[] E, double[] F)
 
GAx2d Directrix ()
 
double Focal ()
 
GPnt2d Focus ()
 
GPnt2d Location ()
 
GAx2d MirrorAxis ()
 
GAx22d Axis ()
 
double Parameter ()
 
void Reverse ()
 
GParab2d Reversed ()
 
boolean IsDirect ()
 
void Mirror (GPnt2d P)
 
GParab2d Mirrored (GPnt2d P)
 
void Mirror (GAx2d A)
 
GParab2d Mirrored (GAx2d A)
 
void Rotate (GPnt2d P, double Ang)
 
GParab2d Rotated (GPnt2d P, double Ang)
 
void Scale (GPnt2d P, double S)
 
GParab2d Scaled (GPnt2d P, double S)
 
void Transform (GTrsf2d T)
 
GParab2d Transformed (GTrsf2d T)
 
void Translate (GVec2d V)
 
GParab2d Translated (GVec2d V)
 
void Translate (GPnt2d P1, GPnt2d P2)
 
GParab2d Translated (GPnt2d P1, GPnt2d P2)
 

Protected Member Functions

 GParab2d (long cPtr, boolean cMemoryOwn)
 
void finalize ()
 

Static Protected Member Functions

static long getCPtr (GParab2d obj)
 

Protected Attributes

transient boolean swigCMemOwn
 

Detailed Description

Describes a parabola in the plane (2D space). A parabola is defined by its focal length (that is, the distance between its focus and apex) and positioned in the plane with a coordinate system (a gp_Ax22d object) where: - the origin of the coordinate system is on the apex of the parabola, and - the "X Axis" of the coordinate system is the axis of symmetry; the parabola is on the positive side of this axis. This coordinate system is the "local coordinate system" of the parabola. Its orientation (direct or indirect sense) gives an implicit orientation to the parabola. In this coordinate system, the equation for the parabola is: Y**2 = (2*P) * X. where P, referred to as the parameter of the parabola, is the distance between the focus and the directrix (P is twice the focal length). See Also GCE2d_MakeParab2d which provides functions for more complex parabola constructions Geom2d_Parabola which provides additional functions for constructing parabolas and works, in particular, with the parametric equations of parabolas

Constructor & Destructor Documentation

GParab2d.GParab2d ( )

Creates an indefinite parabola.

GParab2d.GParab2d ( GAx2d  theMirrorAxis,
double  theFocalLength,
boolean  theSense 
)

Creates a parabola with its vertex point, its axis of symmetry ("XAxis") and its focal length. The sense of parametrization is given by theSense. If theSense == TRUE (by default) then right-handed coordinate system is used, otherwise - left-handed. Warnings : It is possible to have FocalLength = 0. In this case, the parabola looks like a line, which is parallel to the symmetry-axis. Raises ConstructionError if FocalLength < 0.0

GParab2d.GParab2d ( GAx2d  theMirrorAxis,
double  theFocalLength 
)

Creates a parabola with its vertex point, its axis of symmetry ("XAxis") and its focal length. The sense of parametrization is given by theSense. If theSense == TRUE (by default) then right-handed coordinate system is used, otherwise - left-handed. Warnings : It is possible to have FocalLength = 0. In this case, the parabola looks like a line, which is parallel to the symmetry-axis. Raises ConstructionError if FocalLength < 0.0

GParab2d.GParab2d ( GAx22d  theAxes,
double  theFocalLength 
)

Creates a parabola with its vertex point, its axis of symmetry ("XAxis"), correspond Y-axis and its focal length. Warnings : It is possible to have FocalLength = 0. In this case, the parabola looks like a line, which is parallel to the symmetry-axis. Raises ConstructionError if Focal < 0.0

GParab2d.GParab2d ( GAx2d  theDirectrix,
GPnt2d  theFocus,
boolean  theSense 
)

Creates a parabola with the directrix and the focus point. Y-axis of the parabola (in User Coordinate System - UCS) is the direction of theDirectrix. X-axis always directs from theDirectrix to theFocus point and always comes through theFocus. Apex of the parabola is a middle point between the theFocus and the intersection point of theDirectrix and the X-axis. Warnings : It is possible to have FocalLength = 0 (when theFocus lies in theDirectrix). In this case, X-direction of the parabola is defined by theSense parameter. If theSense == TRUE (by default) then right-handed coordinate system is used, otherwise - left-handed. Result parabola will look like a line, which is perpendicular to the directrix.

GParab2d.GParab2d ( GAx2d  theDirectrix,
GPnt2d  theFocus 
)

Creates a parabola with the directrix and the focus point. Y-axis of the parabola (in User Coordinate System - UCS) is the direction of theDirectrix. X-axis always directs from theDirectrix to theFocus point and always comes through theFocus. Apex of the parabola is a middle point between the theFocus and the intersection point of theDirectrix and the X-axis. Warnings : It is possible to have FocalLength = 0 (when theFocus lies in theDirectrix). In this case, X-direction of the parabola is defined by theSense parameter. If theSense == TRUE (by default) then right-handed coordinate system is used, otherwise - left-handed. Result parabola will look like a line, which is perpendicular to the directrix.

Member Function Documentation

GAx22d GParab2d.Axis ( )

Returns the local coordinate system of the parabola. The "Location" point of this axis is the vertex of the parabola.

void GParab2d.Coefficients ( double[]  A,
double[]  B,
double[]  C,
double[]  D,
double[]  E,
double[]  F 
)

Computes the coefficients of the implicit equation of the parabola (in WCS - World Coordinate System). A * (X**2) + B * (Y**2) + 2*C*(X*Y) + 2*D*X + 2*E*Y + F = 0.

GAx2d GParab2d.Directrix ( )

Computes the directrix of the parabola. The directrix is: - a line parallel to the "Y Direction" of the local coordinate system of this parabola, and - located on the negative side of the axis of symmetry, at a distance from the apex which is equal to the focal length of this parabola. The directrix is returned as an axis (a gp_Ax2d object), the origin of which is situated on the "X Axis" of this parabola.

double GParab2d.Focal ( )

Returns the distance between the vertex and the focus of the parabola.

GPnt2d GParab2d.Focus ( )

Returns the focus of the parabola.

boolean GParab2d.IsDirect ( )

Returns true if the local coordinate system is direct and false in the other case.

GPnt2d GParab2d.Location ( )

Returns the vertex of the parabola.

GAx2d GParab2d.MirrorAxis ( )

Returns the symmetry axis of the parabola. The "Location" point of this axis is the vertex of the parabola.

GParab2d GParab2d.Mirrored ( GPnt2d  P)

Performs the symmetrical transformation of a parabola with respect to the point P which is the center of the symmetry

GParab2d GParab2d.Mirrored ( GAx2d  A)

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

double GParab2d.Parameter ( )

Returns the distance between the focus and the directrix of the parabola.

GParab2d GParab2d.Reversed ( )

Reverses the orientation of the local coordinate system of this parabola (the "Y Direction" is reversed). Therefore, the implicit orientation of this parabola is reversed. Note: - Reverse assigns the result to this parabola, while - Reversed creates a new one.

GParab2d GParab2d.Rotated ( GPnt2d  P,
double  Ang 
)

Rotates a parabola. P is the center of the rotation. Ang is the angular value of the rotation in radians.

GParab2d GParab2d.Scaled ( GPnt2d  P,
double  S 
)

Scales a parabola. S is the scaling value. If S is negative the direction of the symmetry axis "XAxis" is reversed and the direction of the "YAxis" too.

void GParab2d.SetAxis ( GAx22d  A)

Changes the local coordinate system of the parabola. The "Location" point of A becomes the vertex of the parabola.

void GParab2d.SetFocal ( double  Focal)

Changes the focal distance of the parabola Warnings : It is possible to have Focal = 0. Raises ConstructionError if Focal < 0.0

void GParab2d.SetLocation ( GPnt2d  P)

Changes the "Location" point of the parabola. It is the vertex of the parabola.

void GParab2d.SetMirrorAxis ( GAx2d  A)

Modifies this parabola, by redefining its local coordinate system so that its origin and "X Direction" become those of the axis MA. The "Y Direction" of the local coordinate system is then recomputed. The orientation of the local coordinate system is not modified.

GParab2d GParab2d.Transformed ( GTrsf2d  T)

Transforms an parabola with the transformation T from class Trsf2d.

GParab2d GParab2d.Translated ( GVec2d  V)

Translates a parabola in the direction of the vector V. The magnitude of the translation is the vector's magnitude.

GParab2d GParab2d.Translated ( GPnt2d  P1,
GPnt2d  P2 
)

Translates a parabola from the point P1 to the point P2.