Open CASCADE Technology
7.4.0

Describes an ellipse in 3D space. An ellipse is defined by its major and minor radii and positioned in space with a coordinate system (a gp_Ax2 object) as follows: More...
#include <gp_Elips.hxx>
Public Member Functions  
gp_Elips ()  
Creates an indefinite ellipse. More...  
gp_Elips (const gp_Ax2 &A2, const Standard_Real MajorRadius, const Standard_Real MinorRadius)  
The major radius of the ellipse is on the "XAxis" and the minor radius is on the "YAxis" of the ellipse. The "XAxis" is defined with the "XDirection" of A2 and the "YAxis" is defined with the "YDirection" of A2. Warnings : It is not forbidden to create an ellipse with MajorRadius = MinorRadius. Raises ConstructionError if MajorRadius < MinorRadius or MinorRadius < 0. More...  
void  SetAxis (const gp_Ax1 &A1) 
Changes the axis normal to the plane of the ellipse. It modifies the definition of this plane. The "XAxis" and the "YAxis" are recomputed. The local coordinate system is redefined so that: More...  
void  SetLocation (const gp_Pnt &P) 
Modifies this ellipse, by redefining its local coordinate so that its origin becomes P. More...  
void  SetMajorRadius (const Standard_Real MajorRadius) 
The major radius of the ellipse is on the "XAxis" (major axis) of the ellipse. Raises ConstructionError if MajorRadius < MinorRadius. More...  
void  SetMinorRadius (const Standard_Real MinorRadius) 
The minor radius of the ellipse is on the "YAxis" (minor axis) of the ellipse. Raises ConstructionError if MinorRadius > MajorRadius or MinorRadius < 0. More...  
void  SetPosition (const gp_Ax2 &A2) 
Modifies this ellipse, by redefining its local coordinate so that it becomes A2e. More...  
Standard_Real  Area () const 
Computes the area of the Ellipse. More...  
const gp_Ax1 &  Axis () const 
Computes the axis normal to the plane of the ellipse. More...  
gp_Ax1  Directrix1 () const 
Computes the first or second directrix of this ellipse. These are the lines, in the plane of the ellipse, normal to the major axis, at a distance equal to MajorRadius/e from the center of the ellipse, where e is the eccentricity of the ellipse. The first directrix (Directrix1) is on the positive side of the major axis. The second directrix (Directrix2) is on the negative side. The directrix is returned as an axis (gp_Ax1 object), the origin of which is situated on the "X Axis" of the local coordinate system of this ellipse. Exceptions Standard_ConstructionError if the eccentricity is null (the ellipse has degenerated into a circle). More...  
gp_Ax1  Directrix2 () const 
This line is obtained by the symmetrical transformation of "Directrix1" with respect to the "YAxis" of the ellipse. Exceptions Standard_ConstructionError if the eccentricity is null (the ellipse has degenerated into a circle). More...  
Standard_Real  Eccentricity () const 
Returns the eccentricity of the ellipse between 0.0 and 1.0 If f is the distance between the center of the ellipse and the Focus1 then the eccentricity e = f / MajorRadius. Raises ConstructionError if MajorRadius = 0.0. More...  
Standard_Real  Focal () const 
Computes the focal distance. It is the distance between the two focus focus1 and focus2 of the ellipse. More...  
gp_Pnt  Focus1 () const 
Returns the first focus of the ellipse. This focus is on the positive side of the "XAxis" of the ellipse. More...  
gp_Pnt  Focus2 () const 
Returns the second focus of the ellipse. This focus is on the negative side of the "XAxis" of the ellipse. More...  
const gp_Pnt &  Location () const 
Returns the center of the ellipse. It is the "Location" point of the coordinate system of the ellipse. More...  
Standard_Real  MajorRadius () const 
Returns the major radius of the ellipse. More...  
Standard_Real  MinorRadius () const 
Returns the minor radius of the ellipse. More...  
Standard_Real  Parameter () const 
Returns p = (1  e * e) * MajorRadius where e is the eccentricity of the ellipse. Returns 0 if MajorRadius = 0. More...  
const gp_Ax2 &  Position () const 
Returns the coordinate system of the ellipse. More...  
gp_Ax1  XAxis () const 
Returns the "XAxis" of the ellipse whose origin is the center of this ellipse. It is the major axis of the ellipse. More...  
gp_Ax1  YAxis () const 
Returns the "YAxis" of the ellipse whose unit vector is the "X Direction" or the "Y Direction" of the local coordinate system of this ellipse. This is the minor axis of the ellipse. More...  
void  Mirror (const gp_Pnt &P) 
gp_Elips  Mirrored (const gp_Pnt &P) const 
Performs the symmetrical transformation of an ellipse with respect to the point P which is the center of the symmetry. More...  
void  Mirror (const gp_Ax1 &A1) 
gp_Elips  Mirrored (const gp_Ax1 &A1) const 
Performs the symmetrical transformation of an ellipse with respect to an axis placement which is the axis of the symmetry. More...  
void  Mirror (const gp_Ax2 &A2) 
gp_Elips  Mirrored (const gp_Ax2 &A2) const 
Performs the symmetrical transformation of an ellipse with respect to a plane. The axis placement A2 locates the plane of the symmetry (Location, XDirection, YDirection). More...  
void  Rotate (const gp_Ax1 &A1, const Standard_Real Ang) 
gp_Elips  Rotated (const gp_Ax1 &A1, const Standard_Real Ang) const 
Rotates an ellipse. A1 is the axis of the rotation. Ang is the angular value of the rotation in radians. More...  
void  Scale (const gp_Pnt &P, const Standard_Real S) 
gp_Elips  Scaled (const gp_Pnt &P, const Standard_Real S) const 
Scales an ellipse. S is the scaling value. More...  
void  Transform (const gp_Trsf &T) 
gp_Elips  Transformed (const gp_Trsf &T) const 
Transforms an ellipse with the transformation T from class Trsf. More...  
void  Translate (const gp_Vec &V) 
gp_Elips  Translated (const gp_Vec &V) const 
Translates an ellipse in the direction of the vector V. The magnitude of the translation is the vector's magnitude. More...  
void  Translate (const gp_Pnt &P1, const gp_Pnt &P2) 
gp_Elips  Translated (const gp_Pnt &P1, const gp_Pnt &P2) const 
Translates an ellipse from the point P1 to the point P2. More...  
Describes an ellipse in 3D space. An ellipse is defined by its major and minor radii and positioned in space with a coordinate system (a gp_Ax2 object) as follows:
gp_Elips::gp_Elips  (  ) 
Creates an indefinite ellipse.
gp_Elips::gp_Elips  (  const gp_Ax2 &  A2, 
const Standard_Real  MajorRadius,  
const Standard_Real  MinorRadius  
) 
The major radius of the ellipse is on the "XAxis" and the minor radius is on the "YAxis" of the ellipse. The "XAxis" is defined with the "XDirection" of A2 and the "YAxis" is defined with the "YDirection" of A2. Warnings : It is not forbidden to create an ellipse with MajorRadius = MinorRadius. Raises ConstructionError if MajorRadius < MinorRadius or MinorRadius < 0.
Standard_Real gp_Elips::Area  (  )  const 
Computes the area of the Ellipse.
const gp_Ax1& gp_Elips::Axis  (  )  const 
Computes the axis normal to the plane of the ellipse.
gp_Ax1 gp_Elips::Directrix1  (  )  const 
Computes the first or second directrix of this ellipse. These are the lines, in the plane of the ellipse, normal to the major axis, at a distance equal to MajorRadius/e from the center of the ellipse, where e is the eccentricity of the ellipse. The first directrix (Directrix1) is on the positive side of the major axis. The second directrix (Directrix2) is on the negative side. The directrix is returned as an axis (gp_Ax1 object), the origin of which is situated on the "X Axis" of the local coordinate system of this ellipse. Exceptions Standard_ConstructionError if the eccentricity is null (the ellipse has degenerated into a circle).
gp_Ax1 gp_Elips::Directrix2  (  )  const 
This line is obtained by the symmetrical transformation of "Directrix1" with respect to the "YAxis" of the ellipse. Exceptions Standard_ConstructionError if the eccentricity is null (the ellipse has degenerated into a circle).
Standard_Real gp_Elips::Eccentricity  (  )  const 
Returns the eccentricity of the ellipse between 0.0 and 1.0 If f is the distance between the center of the ellipse and the Focus1 then the eccentricity e = f / MajorRadius. Raises ConstructionError if MajorRadius = 0.0.
Standard_Real gp_Elips::Focal  (  )  const 
Computes the focal distance. It is the distance between the two focus focus1 and focus2 of the ellipse.
gp_Pnt gp_Elips::Focus1  (  )  const 
Returns the first focus of the ellipse. This focus is on the positive side of the "XAxis" of the ellipse.
gp_Pnt gp_Elips::Focus2  (  )  const 
Returns the second focus of the ellipse. This focus is on the negative side of the "XAxis" of the ellipse.
const gp_Pnt& gp_Elips::Location  (  )  const 
Returns the center of the ellipse. It is the "Location" point of the coordinate system of the ellipse.
Standard_Real gp_Elips::MajorRadius  (  )  const 
Returns the major radius of the ellipse.
Standard_Real gp_Elips::MinorRadius  (  )  const 
Returns the minor radius of the ellipse.
void gp_Elips::Mirror  (  const gp_Pnt &  P  ) 
void gp_Elips::Mirror  (  const gp_Ax1 &  A1  ) 
void gp_Elips::Mirror  (  const gp_Ax2 &  A2  ) 
Performs the symmetrical transformation of an ellipse with respect to the point P which is the center of the symmetry.
Performs the symmetrical transformation of an ellipse with respect to an axis placement which is the axis of the symmetry.
Performs the symmetrical transformation of an ellipse with respect to a plane. The axis placement A2 locates the plane of the symmetry (Location, XDirection, YDirection).
Standard_Real gp_Elips::Parameter  (  )  const 
Returns p = (1  e * e) * MajorRadius where e is the eccentricity of the ellipse. Returns 0 if MajorRadius = 0.
const gp_Ax2& gp_Elips::Position  (  )  const 
Returns the coordinate system of the ellipse.
void gp_Elips::Rotate  (  const gp_Ax1 &  A1, 
const Standard_Real  Ang  
) 
gp_Elips gp_Elips::Rotated  (  const gp_Ax1 &  A1, 
const Standard_Real  Ang  
)  const 
Rotates an ellipse. A1 is the axis of the rotation. Ang is the angular value of the rotation in radians.
void gp_Elips::Scale  (  const gp_Pnt &  P, 
const Standard_Real  S  
) 
gp_Elips gp_Elips::Scaled  (  const gp_Pnt &  P, 
const Standard_Real  S  
)  const 
Scales an ellipse. S is the scaling value.
void gp_Elips::SetAxis  (  const gp_Ax1 &  A1  ) 
Changes the axis normal to the plane of the ellipse. It modifies the definition of this plane. The "XAxis" and the "YAxis" are recomputed. The local coordinate system is redefined so that:
void gp_Elips::SetLocation  (  const gp_Pnt &  P  ) 
Modifies this ellipse, by redefining its local coordinate so that its origin becomes P.
void gp_Elips::SetMajorRadius  (  const Standard_Real  MajorRadius  ) 
The major radius of the ellipse is on the "XAxis" (major axis) of the ellipse. Raises ConstructionError if MajorRadius < MinorRadius.
void gp_Elips::SetMinorRadius  (  const Standard_Real  MinorRadius  ) 
The minor radius of the ellipse is on the "YAxis" (minor axis) of the ellipse. Raises ConstructionError if MinorRadius > MajorRadius or MinorRadius < 0.
void gp_Elips::SetPosition  (  const gp_Ax2 &  A2  ) 
Modifies this ellipse, by redefining its local coordinate so that it becomes A2e.
void gp_Elips::Transform  (  const gp_Trsf &  T  ) 
Transforms an ellipse with the transformation T from class Trsf.
void gp_Elips::Translate  (  const gp_Vec &  V  ) 
Translates an ellipse in the direction of the vector V. The magnitude of the translation is the vector's magnitude.
Translates an ellipse from the point P1 to the point P2.
gp_Ax1 gp_Elips::XAxis  (  )  const 
Returns the "XAxis" of the ellipse whose origin is the center of this ellipse. It is the major axis of the ellipse.
gp_Ax1 gp_Elips::YAxis  (  )  const 
Returns the "YAxis" of the ellipse whose unit vector is the "X Direction" or the "Y Direction" of the local coordinate system of this ellipse. This is the minor axis of the ellipse.