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-- File: HLRBRep_Curve.cdl
-- Created: Thu Apr 1 15:09:20 1993
-- Author: Modelistation
-- <model@phylox>
---Copyright: Matra Datavision 1993
class Curve from HLRBRep
---Purpose: Defines a 2d curve by projection of a 3D curve on
-- a plane with an optional perspective
-- transformation.
uses
Integer from Standard,
Boolean from Standard,
ShortReal from Standard,
Real from Standard,
Address from Standard,
Pnt from gp,
Vec from gp,
Pnt2d from gp,
Vec2d from gp,
Dir2d from gp,
Circ2d from gp,
Elips2d from gp,
Hypr2d from gp,
Parab2d from gp,
Lin2d from gp,
Shape from GeomAbs,
CurveType from GeomAbs,
Array1OfPnt2d from TColgp,
Array1OfReal from TColStd,
Array1OfInteger from TColStd,
Edge from TopoDS,
Curve from BRepAdaptor
raises
NoSuchObject from Standard,
DomainError from Standard,
OutOfRange from Standard,
UndefinedDerivative from StdFail
is
Create returns Curve from HLRBRep;
---Purpose: Creates an undefined Curve.
Projector(me : in out; Proj : Address from Standard)
---C++: inline
is static;
Curve(me : in out) returns Curve from BRepAdaptor
---Purpose: Returns the 3D curve.
---C++: return &
---C++: inline
is static;
Curve(me : in out; E : Edge from TopoDS)
---Purpose: Sets the 3D curve to be projected.
is static;
Parameter2d(me; P3d : Real from Standard) returns Real from Standard
---Purpose: Returns the parameter on the 2d curve from the
-- parameter on the 3d curve.
is static;
Parameter3d(me; P2d : Real from Standard) returns Real from Standard
---Purpose: Returns the parameter on the 3d curve from the
-- parameter on the 2d curve.
is static;
Update(me : in out; TotMin : Address from Standard;
TotMax : Address from Standard)
returns Real from Standard
---Purpose: Update the minmax and the internal data
is static;
UpdateMinMax(me : in out; TotMin : Address from Standard;
TotMax : Address from Standard)
returns Real from Standard
---Purpose: Update the minmax returns tol for enlarge;
is static;
Z(me; U : Real from Standard) returns Real from Standard
--- Purpose : Computes the Z coordinate of the point of
-- parameter U on the curve in the viewing coordinate system
is static;
Value3D(me; U : Real from Standard) returns Pnt from gp
--- Purpose : Computes the 3D point of parameter U on the
-- curve.
--
---C++: inline
is static;
D0 (me; U : Real from Standard;
P : out Pnt from gp)
--- Purpose : Computes the 3D point of parameter U on the
-- curve.
--
---C++: inline
is static;
D1(me; U : Real from Standard;
P : out Pnt from gp ;
V : out Vec from gp)
--- Purpose : Computes the point of parameter U on the curve
-- with its first derivative.
--
---C++: inline
is static;
Tangent(me; AtStart : Boolean from Standard;
P : out Pnt2d from gp;
D : out Dir2d from gp)
--- Purpose : Depending on <AtStart> computes the 2D point and
-- tangent on the curve at sart (or at end). If the first
-- derivative is null look after at start (or before at end)
-- with the second derivative.
--
raises
UndefinedDerivative from StdFail
is static;
--
-- Global methods - Apply to the whole curve.
--
FirstParameter(me) returns Real from Standard
---C++: inline
is static;
LastParameter(me) returns Real from Standard
---C++: inline
is static;
Continuity(me) returns Shape from GeomAbs
---C++: inline
is static;
NbIntervals(me: in out; S : Shape from GeomAbs)
returns Integer from Standard
---Purpose: If necessary, breaks the curve in intervals of
-- continuity <S>. And returns the number of
-- intervals.
---C++: inline
is static;
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
---C++: inline
;
IsClosed(me) returns Boolean from Standard
---C++: inline
is static;
IsPeriodic(me) returns Boolean from Standard
---C++: inline
is static;
Period(me) returns Real
raises
DomainError from Standard -- if the curve is not periodic
---C++: inline
is static;
Value(me; U : Real from Standard) returns Pnt2d from gp
--- Purpose : Computes the point of parameter U on the curve.
--
---C++: inline
is static;
D0 (me; U : Real from Standard;
P : out Pnt2d from gp)
--- Purpose : Computes the point of parameter U on the curve.
is static;
D1 (me; U : Real from Standard;
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 static;
D2 (me; U : Real from Standard;
P : out Pnt2d from gp ;
V1,V2 : out Vec2d from gp)
raises
DomainError from Standard
--- Purpose : Raised if the continuity of the current interval
-- is not C2.
is static;
D3 (me; U : Real from Standard;
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 static;
DN (me; U : Real from Standard;
N : Integer from Standard) 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 static;
Resolution(me; R3d : Real) returns Real
---Purpose : Returns the parametric resolution corresponding
-- to the real space resolution <R3d>.
---C++: inline
is static;
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.
---C++: inline
is static;
--
-- The following methods must be called when GetType returned
-- the corresponding type.
--
Line(me) returns Lin2d from gp
raises
NoSuchObject from Standard
is static;
Circle(me) returns Circ2d from gp
raises
NoSuchObject from Standard
is static;
Ellipse(me) returns Elips2d from gp
raises
NoSuchObject from Standard
is static;
Hyperbola(me) returns Hypr2d from gp
raises
NoSuchObject from Standard
is static;
Parabola(me) returns Parab2d from gp
raises
NoSuchObject from Standard
is static;
IsRational(me) returns Boolean from Standard
---C++:inline
is static;
Degree(me) returns Integer from Standard
---C++: inline
is static;
NbPoles(me) returns Integer from Standard
---C++: inline
is static;
Poles(me; TP : in out Array1OfPnt2d from TColgp)
raises
NoSuchObject from Standard, -- if rational
OutOfRange from Standard -- if TP has not length NbPoles
is static;
PolesAndWeights(me; TP : in out Array1OfPnt2d from TColgp;
TW : in out Array1OfReal from TColStd)
raises
NoSuchObject from Standard, -- if not rational
OutOfRange from Standard -- if TW has not length NbPoles
is static;
NbKnots(me) returns Integer from Standard
raises
NoSuchObject from Standard
---C++: inline
is static;
Knots(me; kn: out Array1OfReal from TColStd)
is static;
Multiplicities(me; mu: out Array1OfInteger from TColStd)
is static;
fields
myCurve : Curve from BRepAdaptor;
myType : CurveType from GeomAbs;
myProj : Address from Standard;
-- description of the line in the plane containing the line and the eye
myOX : Real from Standard;
myOZ : Real from Standard;
myVX : Real from Standard;
myVZ : Real from Standard;
myOF : Real from Standard;
end Curve;
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