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219 lines
8.1 KiB
C++
219 lines
8.1 KiB
C++
// Created on: 1994-09-02
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// Created by: Bruno DUMORTIER
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// Copyright (c) 1994-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _ProjLib_ProjectOnPlane_HeaderFile
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#define _ProjLib_ProjectOnPlane_HeaderFile
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#include <Adaptor3d_Curve.hxx>
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#include <gp_Ax3.hxx>
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#include <gp_Dir.hxx>
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#include <GeomAbs_CurveType.hxx>
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#include <GeomAdaptor_Curve.hxx>
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#include <GeomAbs_Shape.hxx>
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#include <TColStd_Array1OfReal.hxx>
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class gp_Pnt;
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class gp_Vec;
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class gp_Lin;
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class gp_Circ;
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class gp_Elips;
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class gp_Hypr;
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class gp_Parab;
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class Geom_BezierCurve;
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class Geom_BSplineCurve;
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//! Class used to project a 3d curve on a plane. The
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//! result will be a 3d curve.
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//!
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//! You can ask the projected curve to have the same
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//! parametrization as the original curve.
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//!
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//! The projection can be done along every direction not
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//! parallel to the plane.
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class ProjLib_ProjectOnPlane : public Adaptor3d_Curve
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Empty constructor.
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Standard_EXPORT ProjLib_ProjectOnPlane();
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//! The projection will be normal to the Plane defined
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//! by the Ax3 <Pl>.
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Standard_EXPORT ProjLib_ProjectOnPlane(const gp_Ax3& Pl);
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//! The projection will be along the direction <D> on
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//! the plane defined by the Ax3 <Pl>.
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//! raises if the direction <D> is parallel to the
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//! plane <Pl>.
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Standard_EXPORT ProjLib_ProjectOnPlane(const gp_Ax3& Pl, const gp_Dir& D);
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//! Shallow copy of adaptor
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Standard_EXPORT virtual Handle(Adaptor3d_Curve) ShallowCopy() const Standard_OVERRIDE;
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//! Sets the Curve and perform the projection.
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//! if <KeepParametrization> is true, the parametrization
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//! of the Projected Curve <PC> will be the same as
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//! the parametrization of the initial curve <C>.
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//! It means: proj(C(u)) = PC(u) for each u.
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//! Otherwise, the parametrization may change.
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Standard_EXPORT void Load(const Handle(Adaptor3d_Curve)& C,
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const Standard_Real Tolerance,
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const Standard_Boolean KeepParametrization = Standard_True);
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Standard_EXPORT const gp_Ax3& GetPlane() const;
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Standard_EXPORT const gp_Dir& GetDirection() const;
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Standard_EXPORT const Handle(Adaptor3d_Curve)& GetCurve() const;
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Standard_EXPORT const Handle(GeomAdaptor_Curve)& GetResult() const;
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Standard_EXPORT Standard_Real FirstParameter() const Standard_OVERRIDE;
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Standard_EXPORT Standard_Real LastParameter() const Standard_OVERRIDE;
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Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE;
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//! If necessary, breaks the curve in intervals of
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//! continuity <S>. And returns the number of
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//! intervals.
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Standard_EXPORT Standard_Integer NbIntervals(const GeomAbs_Shape S) const Standard_OVERRIDE;
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//! Stores in <T> the parameters bounding the intervals of continuity <S>.
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//!
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//! The array must provide enough room to accommodate
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//! for the parameters. i.e. T.Length() > NbIntervals()
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Standard_EXPORT void Intervals(TColStd_Array1OfReal& T,
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const GeomAbs_Shape S) const Standard_OVERRIDE;
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//! Returns a curve equivalent of <me> between
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//! parameters <First> and <Last>. <Tol> is used to
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//! test for 3d points confusion.
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//! If <First> >= <Last>
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Standard_EXPORT Handle(Adaptor3d_Curve) Trim(const Standard_Real First,
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const Standard_Real Last,
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const Standard_Real Tol) const Standard_OVERRIDE;
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Standard_EXPORT Standard_Boolean IsClosed() const Standard_OVERRIDE;
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Standard_EXPORT Standard_Boolean IsPeriodic() const Standard_OVERRIDE;
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Standard_EXPORT Standard_Real Period() const Standard_OVERRIDE;
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//! Computes the point of parameter U on the curve.
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Standard_EXPORT gp_Pnt Value(const Standard_Real U) const Standard_OVERRIDE;
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//! Computes the point of parameter U on the curve.
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Standard_EXPORT void D0(const Standard_Real U, gp_Pnt& P) const Standard_OVERRIDE;
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//! Computes the point of parameter U on the curve with its
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//! first derivative.
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//! Raised if the continuity of the current interval
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//! is not C1.
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Standard_EXPORT void D1(const Standard_Real U, gp_Pnt& P, gp_Vec& V) const Standard_OVERRIDE;
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//! Returns the point P of parameter U, the first and second
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//! derivatives V1 and V2.
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//! Raised if the continuity of the current interval
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//! is not C2.
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Standard_EXPORT void D2(const Standard_Real U,
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gp_Pnt& P,
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gp_Vec& V1,
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gp_Vec& V2) const Standard_OVERRIDE;
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//! Returns the point P of parameter U, the first, the second
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//! and the third derivative.
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//! Raised if the continuity of the current interval
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//! is not C3.
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Standard_EXPORT void D3(const Standard_Real U,
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gp_Pnt& P,
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gp_Vec& V1,
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gp_Vec& V2,
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gp_Vec& V3) const Standard_OVERRIDE;
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//! The returned vector gives the value of the derivative for the
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//! order of derivation N.
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//! Raised if the continuity of the current interval
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//! is not CN.
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//! Raised if N < 1.
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Standard_EXPORT gp_Vec DN(const Standard_Real U,
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const Standard_Integer N) const Standard_OVERRIDE;
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//! Returns the parametric resolution corresponding
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//! to the real space resolution <R3d>.
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Standard_EXPORT Standard_Real Resolution(const Standard_Real R3d) const Standard_OVERRIDE;
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//! Returns the type of the curve in the current
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//! interval: Line, Circle, Ellipse, Hyperbola,
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//! Parabola, BezierCurve, BSplineCurve, OtherCurve.
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Standard_EXPORT GeomAbs_CurveType GetType() const Standard_OVERRIDE;
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Standard_EXPORT gp_Lin Line() const Standard_OVERRIDE;
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Standard_EXPORT gp_Circ Circle() const Standard_OVERRIDE;
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Standard_EXPORT gp_Elips Ellipse() const Standard_OVERRIDE;
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Standard_EXPORT gp_Hypr Hyperbola() const Standard_OVERRIDE;
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Standard_EXPORT gp_Parab Parabola() const Standard_OVERRIDE;
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Standard_EXPORT Standard_Integer Degree() const Standard_OVERRIDE;
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Standard_EXPORT Standard_Boolean IsRational() const Standard_OVERRIDE;
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Standard_EXPORT Standard_Integer NbPoles() const Standard_OVERRIDE;
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Standard_EXPORT Standard_Integer NbKnots() const Standard_OVERRIDE;
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//! Warning ! this will NOT make a copy of the
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//! Bezier Curve : If you want to modify
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//! the Curve please make a copy yourself
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//! Also it will NOT trim the surface to
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//! myFirst/Last.
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Standard_EXPORT Handle(Geom_BezierCurve) Bezier() const Standard_OVERRIDE;
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//! Warning ! this will NOT make a copy of the
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//! BSpline Curve : If you want to modify
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//! the Curve please make a copy yourself
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//! Also it will NOT trim the surface to
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//! myFirst/Last.
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Standard_EXPORT Handle(Geom_BSplineCurve) BSpline() const Standard_OVERRIDE;
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protected:
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void GetTrimmedResult(const Handle(Geom_Curve)& theProjCurve);
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Standard_Boolean BuildParabolaByApex(Handle(Geom_Curve)& theGeomParabolaPtr);
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Standard_Boolean BuildHyperbolaByApex(Handle(Geom_Curve)& theGeomParabolaPtr);
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void BuildByApprox(const Standard_Real theLimitParameter);
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private:
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Handle(Adaptor3d_Curve) myCurve;
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gp_Ax3 myPlane;
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gp_Dir myDirection;
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Standard_Boolean myKeepParam;
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Standard_Real myFirstPar;
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Standard_Real myLastPar;
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Standard_Real myTolerance;
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GeomAbs_CurveType myType;
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Handle(GeomAdaptor_Curve) myResult;
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Standard_Boolean myIsApprox;
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};
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#endif // _ProjLib_ProjectOnPlane_HeaderFile
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