-- Created on: 1993-04-02
-- Created by: Bruno DUMORTIER
-- Copyright (c) 1993-1999 Matra Datavision
-- Copyright (c) 1999-2014 OPEN CASCADE SAS
--
-- This file is part of Open CASCADE Technology software library.
--
-- This library is free software; you can redistribute it and/or modify it under
-- the terms of the GNU Lesser General Public License version 2.1 as published
-- by the Free Software Foundation, with special exception defined in the file
-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
-- distribution for complete text of the license and disclaimer of any warranty.
--
-- Alternatively, this file may be used under the terms of Open CASCADE
-- commercial license or contractual agreement.
deferred class Curve2d from Adaptor2d
---Purpose: Root class for 2D curves on which geometric
-- algorithms work.
-- An adapted curve is an interface between the
-- services provided by a curve, and those required of
-- the curve by algorithms, which use it.
-- A derived concrete class is provided:
-- Geom2dAdaptor_Curve for a curve from the Geom2d package.
uses
Array1OfReal from TColStd,
Shape from GeomAbs,
CurveType from GeomAbs,
Vec2d from gp,
Pnt2d from gp,
Circ2d from gp,
Elips2d from gp,
Hypr2d from gp,
Parab2d from gp,
Lin2d from gp,
BezierCurve from Geom2d,
BSplineCurve from Geom2d,
HCurve2d from Adaptor2d
raises
OutOfRange from Standard,
NoSuchObject from Standard,
DomainError from Standard
is
--
-- Global methods - Apply to the whole curve.
--
FirstParameter(me) returns Real
is virtual;
LastParameter(me) returns Real
is virtual;
Continuity(me) returns Shape from GeomAbs
is virtual;
NbIntervals(me; S : Shape from GeomAbs) returns Integer
---Purpose: If necessary, breaks the curve in intervals of
-- continuity ~~. And returns the number of
-- intervals.
is virtual;
Intervals(me; T : in out Array1OfReal from TColStd;
S : Shape from GeomAbs)
---Purpose: Stores in the parameters bounding the intervals
-- of continuity ~~~~.
--
-- The array must provide enough room to accomodate
-- for the parameters. i.e. T.Length() > NbIntervals()
raises
OutOfRange from Standard
is virtual;
Trim(me; First, Last, Tol : Real) returns HCurve2d from Adaptor2d
---Purpose: Returns a curve equivalent of between
-- parameters and . is used to
-- test for 3d points confusion.
raises
OutOfRange from Standard
---Purpose: If >=
is virtual;
--
-- Local methods - Apply to the current interval.
-- By default the current interval is the first.
--
IsClosed(me) returns Boolean
is virtual;
IsPeriodic(me) returns Boolean
is virtual;
Period(me) returns Real
raises
DomainError from Standard -- if the curve is not periodic
is virtual;
Value(me; U : Real) returns Pnt2d from gp
--- Purpose : Computes the point of parameter U on the curve.
is virtual;
D0 (me; U : Real; P : out Pnt2d from gp)
--- Purpose : Computes the point of parameter U on the curve.
is virtual;
D1 (me; U : Real; P : out Pnt2d from gp ; V : out Vec2d from gp)
--- Purpose : Computes the point of parameter U on the curve with its
-- first derivative.
raises
DomainError from Standard
--- Purpose : Raised if the continuity of the current interval
-- is not C1.
is virtual;
D2 (me; U : Real; P : out Pnt2d from gp; V1, V2 : out Vec2d from gp)
--- Purpose :
-- Returns the point P of parameter U, the first and second
-- derivatives V1 and V2.
raises
DomainError from Standard
--- Purpose : Raised if the continuity of the current interval
-- is not C2.
is virtual;
D3 (me; U : Real; P : out Pnt2d from gp; V1, V2, V3 : out Vec2d from gp)
--- Purpose :
-- Returns the point P of parameter U, the first, the second
-- and the third derivative.
raises
DomainError from Standard
--- Purpose : Raised if the continuity of the current interval
-- is not C3.
is virtual;
DN (me; U : Real; N : Integer) returns Vec2d from gp
--- Purpose :
-- The returned vector gives the value of the derivative for the
-- order of derivation N.
raises
DomainError from Standard,
--- Purpose : Raised if the continuity of the current interval
-- is not CN.
OutOfRange from Standard
--- Purpose : Raised if N < 1.
is virtual;
Resolution(me; R3d : Real) returns Real
---Purpose : Returns the parametric resolution corresponding
-- to the real space resolution .
is virtual;
GetType(me) returns CurveType from GeomAbs
---Purpose: Returns the type of the curve in the current
-- interval : Line, Circle, Ellipse, Hyperbola,
-- Parabola, BezierCurve, BSplineCurve, OtherCurve.
is virtual;
--
-- The following methods must be called when GetType returned
-- the corresponding type.
--
Line(me) returns Lin2d from gp
raises
NoSuchObject from Standard
is virtual;
Circle(me) returns Circ2d from gp
raises
NoSuchObject from Standard
is virtual;
Ellipse(me) returns Elips2d from gp
raises
NoSuchObject from Standard
is virtual;
Hyperbola(me) returns Hypr2d from gp
raises
NoSuchObject from Standard
is virtual;
Parabola(me) returns Parab2d from gp
raises
NoSuchObject from Standard
is virtual;
Degree(me) returns Integer
raises
NoSuchObject from Standard
is virtual;
IsRational(me) returns Boolean
raises
NoSuchObject from Standard
is virtual;
NbPoles(me) returns Integer
raises
NoSuchObject from Standard
is virtual;
NbKnots(me) returns Integer
raises
NoSuchObject from Standard
is virtual;
NbSamples(me) returns Integer from Standard is virtual;
Bezier(me) returns BezierCurve from Geom2d
raises
NoSuchObject from Standard
is virtual;
BSpline(me) returns BSplineCurve from Geom2d
raises
NoSuchObject from Standard
is virtual;
---C++: alias " Standard_EXPORT virtual ~Adaptor2d_Curve2d();"
end Curve2d;
~~