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-- File: MakeEllipse.cdl
-- Created: Mon Sep 28 11:49:44 1992
-- Author: Remi GILET
-- <reg@sdsun2>
---Copyright: Matra Datavision 1992
class MakeEllipse from GCE2d inherits Root from GCE2d
---Purpose :This class implements the following algorithms used to
-- create Ellipse from gp.
-- * Create an Ellipse from two apex and the center.
-- Defines an ellipse in 2D space.
-- The parametrization range is [0,2*PI].
-- The ellipse is a closed and periodic curve.
-- The center of the ellipse is the "Location" point of its
-- axis placement "XAxis".
-- The "XAxis" of the ellipse defines the origin of the
-- parametrization, it is the major axis of the ellipse.
-- The YAxis is the minor axis of the ellipse.
uses Pnt2d from gp,
Ellipse from Geom2d,
Elips2d from gp,
Ax22d from gp,
Ax2d from gp
raises NotDone from StdFail
is
Create (E : Elips2d from gp) returns MakeEllipse;
--- Purpose :
-- Creates an ellipse from a non persistent one from package gp
Create (MajorAxis : Ax2d from gp ;
MajorRadius : Real from Standard ;
MinorRadius : Real from Standard ;
Sense : Boolean from Standard = Standard_True )
returns MakeEllipse;
--- Purpose :
-- MajorAxis is the local coordinate system of the ellipse.
-- It is the "XAxis". The minor axis is the YAxis of the
-- ellipse.
-- Sense give the sense of parametrization of the Ellipse.
-- It is not forbidden to create an ellipse with MajorRadius =
-- MinorRadius.
-- The status is "InvertRadius" if MajorRadius < MinorRadius or
-- "NegativeRadius" if MinorRadius < 0.
Create (Axis : Ax22d from gp ;
MajorRadius, MinorRadius : Real from Standard)
returns MakeEllipse;
--- Purpose :
-- Axis is the local coordinate system of the ellipse.
-- It is not forbidden to create an ellipse with MajorRadius =
-- MinorRadius.
-- The status is "InvertRadius" if MajorRadius < MinorRadius or
-- "NegativeRadius" if MinorRadius < 0.
Create(S1,S2 : Pnt2d from gp;
Center : Pnt2d from gp) returns MakeEllipse;
---Purpose: Make an Ellipse centered on the point Center, where
-- - the major axis of the ellipse is defined by Center and S1,
-- - its major radius is the distance between Center and S1, and
-- - its minor radius is the distance between S2 and the major axis.
-- The implicit orientation of the ellipse is:
-- - the sense defined by Axis or E,
-- - the sense defined by points Center, S1 and S2,
-- - the trigonometric sense if Sense is not given or is true, or
-- - the opposite sense if Sense is false.
Value(me) returns Ellipse from Geom2d
raises NotDone
is static;
---C++: return const&
---Purpose: Returns the constructed ellipse.
-- Exceptions StdFail_NotDone if no ellipse is constructed.
Operator(me) returns Ellipse from Geom2d
is static;
---C++: return const&
---C++: alias "Standard_EXPORT operator Handle_Geom2d_Ellipse() const;"
fields
TheEllipse : Ellipse from Geom2d;
--The solution from Geom2d.
end MakeEllipse;
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