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4796758e8d
Copy constructor and assignment operator from handle of derived type is added in handle class. They are enabled only if macro OCC_HANDLE_NOCASTS is defined, and operators of cast of handle to reference to handle to base type are disabled in that case. Useless type casts to handle to base type are removed in GC and GCE2d classes. Code returning reference to handle from function is corrected to return it either by value or as reference to handle of actual type.
88 lines
3.3 KiB
C++
88 lines
3.3 KiB
C++
// Created on: 1992-09-28
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// Created by: Remi GILET
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// Copyright (c) 1992-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _GC_MakeEllipse_HeaderFile
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#define _GC_MakeEllipse_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Standard_Handle.hxx>
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#include <GC_Root.hxx>
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#include <Geom_Ellipse.hxx>
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class StdFail_NotDone;
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class gp_Elips;
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class gp_Ax2;
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class gp_Pnt;
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//! This class implements construction algorithms for an ellipse in
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//! 3D space. The result is a Geom_Ellipse ellipse.
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//! A MakeEllipse object provides a framework for:
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//! - defining the construction of the ellipse,
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//! - implementing the construction algorithm, and
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//! - consulting the results. In particular, the Value
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//! function returns the constructed ellipse.
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class GC_MakeEllipse : public GC_Root
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Creates an ellipse from a non persistent ellipse E from package gp by its conversion.
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Standard_EXPORT GC_MakeEllipse(const gp_Elips& E);
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//! Constructs an ellipse with major and minor radii MajorRadius and
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//! MinorRadius, and located in the plane defined by
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//! the "X Axis" and "Y Axis" of the coordinate system A2, where:
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//! - its center is the origin of A2, and
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//! - its major axis is the "X Axis" of A2;
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//! Warnings :
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//! The MakeEllipse class does not prevent the
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//! construction of an ellipse where MajorRadius is equal to MinorRadius.
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//! If an error occurs (that is, when IsDone returns
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//! false), the Status function returns:
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//! - gce_InvertRadius if MajorRadius is less than MinorRadius;
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//! - gce_NegativeRadius if MinorRadius is less than 0.0;
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//! - gce_NullAxis if the points S1 and Center are coincident; or
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//! - gce_InvertAxis if:
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//! - the major radius computed with Center and S1
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//! is less than the minor radius computed with Center, S1 and S2, or
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//! - Center, S1 and S2 are collinear.
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Standard_EXPORT GC_MakeEllipse(const gp_Ax2& A2, const Standard_Real MajorRadius, const Standard_Real MinorRadius);
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//! Constructs an ellipse centered on the point Center, where
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//! - the plane of the ellipse is defined by Center, S1 and S2,
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//! - its major axis is defined by Center and S1,
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//! - its major radius is the distance between Center and S1, and
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//! - its minor radius is the distance between S2 and the major axis.
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Standard_EXPORT GC_MakeEllipse(const gp_Pnt& S1, const gp_Pnt& S2, const gp_Pnt& Center);
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//! Returns the constructed ellipse.
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//! Exceptions StdFail_NotDone if no ellipse is constructed.
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Standard_EXPORT const Handle(Geom_Ellipse)& Value() const;
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operator const Handle(Geom_Ellipse)& () const { return Value(); }
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private:
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Handle(Geom_Ellipse) TheEllipse;
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};
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#endif // _GC_MakeEllipse_HeaderFile
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