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-- File: ProjLib_ProjectOnPlane.cdl
-- Created: Fri Sep 2 15:56:32 1994
-- Author: Bruno DUMORTIER
-- <dub@fuegox>
---Copyright: Matra Datavision 1994
class ProjectOnPlane from ProjLib inherits Curve from Adaptor3d
---Purpose: Class used to project a 3d curve on a plane. The
-- result will be a 3d curve.
--
-- You can ask the projected curve to have the same
-- parametrization as the original curve.
--
-- The projection can be done along every direction not
-- parallel to the plane.
--
uses
Shape from GeomAbs,
CurveType from GeomAbs,
Dir from gp,
Ax3 from gp,
Vec from gp,
Pnt from gp,
Circ from gp,
Elips from gp,
Hypr from gp,
Parab from gp,
Lin from gp,
Curve from Adaptor3d,
HCurve from GeomAdaptor,
HCurve from Adaptor3d,
BezierCurve from Geom,
BSplineCurve from Geom,
Array1OfPnt from TColgp,
Array1OfReal from TColStd,
Array1OfInteger from TColStd
raises
OutOfRange from Standard,
NoSuchObject from Standard,
DomainError from Standard,
ConstructionError from Standard,
NotImplemented from Standard
is
Create returns ProjectOnPlane from ProjLib;
---Purpose: Empty constructor.
Create( Pl : Ax3 from gp)
---Purpose: The projection will be normal to the Plane defined
-- by the Ax3 <Pl>.
returns ProjectOnPlane from ProjLib;
Create( Pl : Ax3 from gp;
D : Dir from gp )
returns ProjectOnPlane from ProjLib
---Purpose: The projection will be along the direction <D> on
-- the plane defined by the Ax3 <Pl>.
raises
ConstructionError from Standard;
---Purpose: raises if the direction <D> is parallel to the
-- plane <Pl>.
Load(me : in out;
C : HCurve from Adaptor3d;
Tolerance : Real from Standard;
KeepParametrization : Boolean from Standard = Standard_True)
---Purpose: Sets the Curve and perform the projection. if
-- <KeepParametrization> is true, the parametrization
-- of the Projected Curve <PC> will be the same as
-- the parametrization of the initial curve <C>. It
-- meens: proj(C(u)) = PC(u) for each u. Otherwize,
-- the parametrization may change.
is static;
GetPlane(me) returns Ax3 from gp
---C++: return const &
is static;
GetDirection (me) returns Dir from gp
---C++: return const &
is static;
GetCurve(me) returns HCurve from Adaptor3d
---C++: return const &
is static;
--
-- Global methods - Apply to the whole curve.
--
FirstParameter(me) returns Real
is redefined static;
LastParameter(me) returns Real
is redefined static;
Continuity(me) returns Shape from GeomAbs
is redefined static;
NbIntervals(me: in out; S : Shape from GeomAbs) returns Integer
---Purpose: If necessary, breaks the curve in intervals of
-- continuity <S>. And returns the number of
-- intervals.
is redefined 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
is redefined static;
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 redefined static;
IsClosed(me) returns Boolean
is redefined static;
IsPeriodic(me) returns Boolean
is redefined static;
Period(me) returns Real
raises
DomainError from Standard -- if the curve is not periodic
is redefined static;
Value(me; U : Real) returns Pnt from gp
--- Purpose : Computes the point of parameter U on the curve.
is redefined static;
D0 (me; U : Real; P : out Pnt from gp)
--- Purpose : Computes the point of parameter U on the curve.
is redefined static;
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 redefined static;
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 redefined static;
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 redefined static;
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 redefined static;
Resolution(me; R3d : Real) returns Real
---Purpose : Returns the parametric resolution corresponding
-- to the real space resolution <R3d>.
is redefined 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.
is redefined static;
--
-- The following methods must be called when GetType returned
-- the corresponding type.
--
Line(me) returns Lin from gp
raises
NoSuchObject from Standard
is redefined static;
Circle(me) returns Circ from gp
raises
NoSuchObject from Standard
is redefined static;
Ellipse(me) returns Elips from gp
raises
NoSuchObject from Standard
is redefined static;
Hyperbola(me) returns Hypr from gp
raises
NoSuchObject from Standard
is redefined static;
Parabola(me) returns Parab from gp
raises
NoSuchObject from Standard
is redefined static;
Degree(me) returns Integer
raises
NoSuchObject from Standard
is redefined static;
IsRational(me) returns Boolean
raises
NoSuchObject from Standard
is redefined static;
NbPoles(me) returns Integer
raises
NoSuchObject from Standard
is redefined static;
NbKnots(me) returns Integer
raises
NoSuchObject from Standard
is redefined static;
Bezier(me) returns BezierCurve from Geom
raises
NoSuchObject from Standard
is redefined static;
---Purpose: Warning ! this will NOT make a copy of the
-- Bezier Curve : If you want to modify
-- the Curve please make a copy yourself
-- Also it will NOT trim the surface to
-- myFirst/Last.
BSpline(me) returns BSplineCurve from Geom
raises
NoSuchObject from Standard
is redefined static;
---Purpose: Warning ! this will NOT make a copy of the
-- BSpline Curve : If you want to modify
-- the Curve please make a copy yourself
-- Also it will NOT trim the surface to
-- myFirst/Last.
fields
myCurve : HCurve from Adaptor3d ;
myPlane : Ax3 from gp;
myDirection : Dir from gp;
myKeepParam : Boolean from Standard;
myFirstPar : Real from Standard;
myLastPar : Real from Standard;
myTolerance : Real from Standard;
-- the tolerance to make the approximation if
-- necessary
myType : CurveType from GeomAbs;
myResult : HCurve from GeomAdaptor ;
myIsApprox : Boolean from Standard;
-- the result of the approximation
end ProjectOnPlane;
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