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-- File: Adaptor3d_Curve.cdl
-- Created: Wed Mar 31 10:43:11 1993
-- Author: Bruno DUMORTIER
-- <dub@sdsun1>
---Copyright: Matra Datavision 1993
deferred class Curve from Adaptor3d
---Purpose: Root class for 3D 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.
-- Two derived concrete classes are provided:
-- - GeomAdaptor_Curve for a curve from the Geom package
-- - Adaptor3d_CurveOnSurface for a curve lying on
-- a surface from the Geom package.
uses
Array1OfReal from TColStd,
Shape from GeomAbs,
CurveType from GeomAbs,
Vec from gp,
Pnt from gp,
Circ from gp,
Elips from gp,
Hypr from gp,
Parab from gp,
Lin from gp,
BezierCurve from Geom,
BSplineCurve from Geom,
HCurve from Adaptor3d
raises
OutOfRange from Standard,
NoSuchObject from Standard,
DomainError from Standard
is
--
-- Global methods - Apply to the whole curve.
--
Delete(me:out) is virtual;
---C++: alias "Standard_EXPORT virtual ~Adaptor3d_Curve(){Delete();}"
FirstParameter(me) returns Real
is virtual;
LastParameter(me) returns Real
is virtual;
--
-- Services to break the curves to the expected continuity
--
-- If for example you need the curve to be C2 and the method
-- Continuity returns you something lower than C2 (say C1 for
-- example).
--
-- First compute the number of intervals with the requested
-- continuity with the method NbIntervals(). Note that if the
-- continuity is higher than the one you need NbIntervals will
-- return 1.
--
-- Then you get the parameters bounding the intervals with the
-- method Intervals, using an array of length at least
-- NbIntervals()+1.
--
-- If you need to create a curve with a restricted span you can
-- use the method Trim().
Continuity(me) returns Shape from GeomAbs
---Purpose:
is virtual;
NbIntervals(me:in out; S : Shape from GeomAbs) returns Integer
---Purpose: Returns the number of intervals for continuity
-- <S>. May be one if Continuity(me) >= <S>
is virtual;
Intervals(me:in out; T : in out Array1OfReal from TColStd;
S : Shape from GeomAbs)
---Purpose: Stores in <T> the parameters bounding the intervals
-- of continuity <S>.
--
-- 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 HCurve from Adaptor3d
---Purpose: Returns a curve equivalent of <me> between
-- parameters <First> and <Last>. <Tol> is used to
-- test for 3d points confusion.
raises
OutOfRange from Standard
---Purpose: If <First> >= <Last>
is virtual;
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 Pnt from gp
--- Purpose : Computes the point of parameter U on the curve.
is virtual;
D0 (me; U : Real; P : out Pnt from gp)
--- Purpose : Computes the point of parameter U on the curve.
is virtual;
D1 (me; U : Real; P : out Pnt from gp ; V : out Vec 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 Pnt from gp; V1, V2 : out Vec 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 Pnt from gp; V1, V2, V3 : out Vec 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 Vec 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 <R3d>.
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 Lin from gp
raises
NoSuchObject from Standard
is virtual;
Circle(me) returns Circ from gp
raises
NoSuchObject from Standard
is virtual;
Ellipse(me) returns Elips from gp
raises
NoSuchObject from Standard
is virtual;
Hyperbola(me) returns Hypr from gp
raises
NoSuchObject from Standard
is virtual;
Parabola(me) returns Parab 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;
Bezier(me) returns BezierCurve from Geom
raises
NoSuchObject from Standard
is virtual;
BSpline(me) returns BSplineCurve from Geom
raises
NoSuchObject from Standard
is virtual;
end Curve;
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