AnyCAD Rapid API 2024
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Public 成员函数  
GParab ()  
GParab (GAx2 theA2, double theFocal)  
GParab (GAx1 theD, GPnt theF)  
void  SetAxis (GAx1 theA1) 
void  SetFocal (double theFocal) 
void  SetLocation (GPnt theP) 
void  SetPosition (GAx2 theA2) 
GAx1  Axis () 
GAx1  Directrix () 
double  Focal () 
GPnt  Focus () 
GPnt  Location () 
double  Parameter () 
GAx2  Position () 
GAx1  XAxis () 
GAx1  YAxis () 
void  Mirror (GPnt theP) 
GParab  Mirrored (GPnt theP) 
void  Mirror (GAx1 theA1) 
GParab  Mirrored (GAx1 theA1) 
void  Mirror (GAx2 theA2) 
GParab  Mirrored (GAx2 theA2) 
void  Rotate (GAx1 theA1, double theAng) 
GParab  Rotated (GAx1 theA1, double theAng) 
void  Scale (GPnt theP, double theS) 
GParab  Scaled (GPnt theP, double theS) 
void  Transform (GTrsf theT) 
GParab  Transformed (GTrsf theT) 
void  Translate (GVec theV) 
GParab  Translated (GVec theV) 
void  Translate (GPnt theP1, GPnt theP2) 
GParab  Translated (GPnt theP1, GPnt theP2) 
Describes a parabola in 3D space. A parabola is defined by its focal length (that is, the distance between its focus and apex) and positioned in space with a coordinate system (a gp_Ax2 object) where:  the origin of the coordinate system is on the apex of the parabola,  the "X Axis" of the coordinate system is the axis of symmetry; the parabola is on the positive side of this axis, and  the origin, "X Direction" and "Y Direction" of the coordinate system define the plane of the parabola. The equation of the parabola in this coordinate system, which is the "local coordinate system" of 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). The "main Direction" of the local coordinate system gives the normal vector to the plane of the parabola. See Also gce_MakeParab which provides functions for more complex parabola constructions Geom_Parabola which provides additional functions for constructing parabolas and works, in particular, with the parametric equations of parabolas
GParab.GParab  (  ) 
Creates an indefinite Parabola.
GParab.GParab  (  GAx2  theA2, 
double  theFocal ) 
Creates a parabola with its local coordinate system "theA2" and it's focal length "Focal". The XDirection of theA2 defines the axis of symmetry of the parabola. The YDirection of theA2 is parallel to the directrix of the parabola. The Location point of theA2 is the vertex of the parabola Raises ConstructionError if theFocal < 0.0 Raised if theFocal < 0.0
theD is the directrix of the parabola and theF the focus point. The symmetry axis (XAxis) of the parabola is normal to the directrix and pass through the focus point theF, but its location point is the vertex of the parabola. The YAxis of the parabola is parallel to theD and its location point is the vertex of the parabola. The normal to the plane of the parabola is the cross product between the XAxis and the YAxis.
GAx1 GParab.Axis  (  ) 
Returns the main axis of the parabola. It is the axis normal to the plane of the parabola passing through the vertex of the parabola.
GAx1 GParab.Directrix  (  ) 
Computes the directrix of this 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_Ax1 object), the origin of which is situated on the "X Axis" of this parabola.
double GParab.Focal  (  ) 
Returns the distance between the vertex and the focus of the parabola.
GPnt GParab.Focus  (  ) 
GPnt GParab.Location  (  ) 
Returns the vertex of the parabola. It is the "Location" point of the coordinate system of the parabola.
Performs the symmetrical transformation of a parabola with respect to an axis placement which is the axis of the symmetry.
Performs the symmetrical transformation of a parabola with respect to a plane. The axis placement theA2 locates the plane of the symmetry (Location, XDirection, YDirection).
Performs the symmetrical transformation of a parabola with respect to the point theP which is the center of the symmetry.
double GParab.Parameter  (  ) 
Computes the parameter of the parabola. It is the distance between the focus and the directrix of the parabola. This distance is twice the focal length.
GAx2 GParab.Position  (  ) 
Returns the local coordinate system of the parabola.
Rotates a parabola. theA1 is the axis of the rotation. Ang is the angular value of the rotation in radians.
Scales a parabola. theS is the scaling value. If theS is negative the direction of the symmetry axis XAxis is reversed and the direction of the YAxis too.
void GParab.SetAxis  (  GAx1  theA1  ) 
Modifies this parabola by redefining its local coordinate system so that  its origin and "main Direction" become those of the axis theA1 (the "X Direction" and "Y Direction" are then recomputed in the same way as for any gp_Ax2) Raises ConstructionError if the direction of theA1 is parallel to the previous XAxis of the parabola.
void GParab.SetFocal  (  double  theFocal  ) 
Changes the focal distance of the parabola. Raises ConstructionError if theFocal < 0.0
void GParab.SetLocation  (  GPnt  theP  ) 
Changes the location of the parabola. It is the vertex of the parabola.
void GParab.SetPosition  (  GAx2  theA2  ) 
Changes the local coordinate system of the parabola.
Transforms a parabola with the transformation theT from class Trsf.
Translates a parabola from the point theP1 to the point theP2.
Translates a parabola in the direction of the vector theV. The magnitude of the translation is the vector's magnitude.
GAx1 GParab.XAxis  (  ) 
Returns the symmetry axis of the parabola. The location point of the axis is the vertex of the parabola.
GAx1 GParab.YAxis  (  ) 
It is an axis parallel to the directrix of the parabola. The location point of this axis is the vertex of the parabola.