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42cf5bc1 1// Created on: 1992-09-28
2// Created by: Remi GILET
3// Copyright (c) 1992-1999 Matra Datavision
5//
6// This file is part of Open CASCADE Technology software library.
7//
8// This library is free software; you can redistribute it and/or modify it under
9// the terms of the GNU Lesser General Public License version 2.1 as published
10// by the Free Software Foundation, with special exception defined in the file
11// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12// distribution for complete text of the license and disclaimer of any warranty.
13//
14// Alternatively, this file may be used under the terms of Open CASCADE
15// commercial license or contractual agreement.
16
19
20#include <Standard.hxx>
21#include <Standard_DefineAlloc.hxx>
22#include <Standard_Handle.hxx>
23
24#include <GC_Root.hxx>
d1a67b9d 25#include <Geom_Circle.hxx>
26
42cf5bc1 27class StdFail_NotDone;
28class gp_Circ;
29class gp_Ax2;
30class gp_Pnt;
31class gp_Dir;
32class gp_Ax1;
33
34
35//! This class implements the following algorithms used
36//! to create Cirlec from Geom.
37//!
38//! * Create a Circle parallel to another and passing
39//! though a point.
40//! * Create a Circle parallel to another at the distance
41//! Dist.
42//! * Create a Circle passing through 3 points.
43//! * Create a Circle with its center and the normal of its
45//! * Create a Circle with its axis and radius.
46//! The circle's parameter is the angle (Radian).
47//! The parametrization range is [0,2*PI].
48//! The circle is a closed and periodic curve.
49//! The center of the circle is the Location point of its axis
50//! placement. The XDirection of the axis placement defines the
51//! origin of the parametrization.
52class GC_MakeCircle : public GC_Root
53{
54public:
55
56 DEFINE_STANDARD_ALLOC
57
58
59 //! creates a circle from a non persistent circle C by its conversion.
60 Standard_EXPORT GC_MakeCircle(const gp_Circ& C);
61
62
63 //! A2 is the local coordinates system of the circle.
64 //! It is not forbidden to create a circle with Radius = 0.0
66 Standard_EXPORT GC_MakeCircle(const gp_Ax2& A2, const Standard_Real Radius);
67
68 //! Make a Circle from Geom <TheCirc> parallel to another
69 //! Circ <Circ> with a distance <Dist>.
70 //! If Dist is greater than zero the result is enclosing
71 //! the circle <Circ>, else the result is enclosed by the
72 //! circle <Circ>.
73 Standard_EXPORT GC_MakeCircle(const gp_Circ& Circ, const Standard_Real Dist);
74
75 //! Make a Circle from Geom <TheCirc> parallel to another
76 //! Circ <Circ> and passing through a Pnt <Point>.
77 Standard_EXPORT GC_MakeCircle(const gp_Circ& Circ, const gp_Pnt& Point);
78
79 //! Make a Circ from gp <TheCirc> passing through 3
80 //! Pnt2d <P1>,<P2>,<P3>.
81 Standard_EXPORT GC_MakeCircle(const gp_Pnt& P1, const gp_Pnt& P2, const gp_Pnt& P3);
82
83 //! Make a Circle from Geom <TheCirc> with its center
84 //! <Center> and the normal of its plane <Norm> and
86 Standard_EXPORT GC_MakeCircle(const gp_Pnt& Center, const gp_Dir& Norm, const Standard_Real Radius);
87
88 //! Make a Circle from Geom <TheCirc> with its center
89 //! <Center> and the normal of its plane defined by the
91 Standard_EXPORT GC_MakeCircle(const gp_Pnt& Center, const gp_Pnt& PtAxis, const Standard_Real Radius);
92
93 //! Make a Circle from Geom <TheCirc> with its center
95 Standard_EXPORT GC_MakeCircle(const gp_Ax1& Axis, const Standard_Real Radius);
96
97
98 //! Returns the constructed circle.
99 //! Exceptions
100 //! StdFail_NotDone if no circle is constructed.
101 Standard_EXPORT const Handle(Geom_Circle)& Value() const;
42cf5bc1 102
d1a67b9d 103 operator const Handle(Geom_Circle)& () const { return Value(); }
42cf5bc1 104
105private:
42cf5bc1 106 Handle(Geom_Circle) TheCircle;
42cf5bc1 107};
108