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209 lines
7.0 KiB
C++
209 lines
7.0 KiB
C++
// Created on: 1993-03-24
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// Created by: JCV
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// Copyright (c) 1993-1999 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 _Geom2d_Line_HeaderFile
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#define _Geom2d_Line_HeaderFile
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#include <Standard.hxx>
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#include <Standard_Type.hxx>
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#include <gp_Ax2d.hxx>
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#include <Geom2d_Curve.hxx>
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#include <Standard_Real.hxx>
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#include <Standard_Boolean.hxx>
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#include <GeomAbs_Shape.hxx>
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#include <Standard_Integer.hxx>
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class Standard_RangeError;
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class gp_Ax2d;
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class gp_Lin2d;
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class gp_Pnt2d;
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class gp_Dir2d;
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class gp_Vec2d;
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class gp_Trsf2d;
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class Geom2d_Geometry;
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class Geom2d_Line;
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DEFINE_STANDARD_HANDLE(Geom2d_Line, Geom2d_Curve)
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//! Describes an infinite line in the plane (2D space).
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//! A line is defined and positioned in the plane with an
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//! axis (gp_Ax2d object) which gives it an origin and a unit vector.
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//! The Geom2d_Line line is parameterized as follows:
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//! P (U) = O + U*Dir
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//! where:
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//! - P is the point of parameter U,
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//! - O is the origin and Dir the unit vector of its positioning axis.
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//! The parameter range is ] -infinite, +infinite [.
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//! The orientation of the line is given by the unit vector
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//! of its positioning axis.
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//! See Also
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//! GCE2d_MakeLine which provides functions for more
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//! complex line constructions
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//! gp_Ax2d
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//! gp_Lin2d for an equivalent, non-parameterized data structure.
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class Geom2d_Line : public Geom2d_Curve
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{
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public:
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//! Creates a line located in 2D space with the axis placement A.
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//! The Location of A is the origin of the line.
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Standard_EXPORT Geom2d_Line(const gp_Ax2d& A);
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//! Creates a line by conversion of the gp_Lin2d line L.
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Standard_EXPORT Geom2d_Line(const gp_Lin2d& L);
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//! Constructs a line passing through point P and parallel to
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//! vector V (P and V are, respectively, the origin
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//! and the unit vector of the positioning axis of the line).
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Standard_EXPORT Geom2d_Line(const gp_Pnt2d& P, const gp_Dir2d& V);
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//! Set <me> so that <me> has the same geometric properties as L.
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Standard_EXPORT void SetLin2d (const gp_Lin2d& L);
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//! changes the direction of the line.
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Standard_EXPORT void SetDirection (const gp_Dir2d& V);
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//! changes the direction of the line.
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Standard_EXPORT const gp_Dir2d& Direction() const;
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//! Changes the "Location" point (origin) of the line.
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Standard_EXPORT void SetLocation (const gp_Pnt2d& P);
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//! Changes the "Location" point (origin) of the line.
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Standard_EXPORT const gp_Pnt2d& Location() const;
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//! Changes the "Location" and a the "Direction" of <me>.
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Standard_EXPORT void SetPosition (const gp_Ax2d& A);
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Standard_EXPORT const gp_Ax2d& Position() const;
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//! Returns non persistent line from gp with the same geometric
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//! properties as <me>
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Standard_EXPORT gp_Lin2d Lin2d() const;
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//! Changes the orientation of this line. As a result, the
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//! unit vector of the positioning axis of this line is reversed.
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Standard_EXPORT void Reverse() Standard_OVERRIDE;
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//! Computes the parameter on the reversed line for the
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//! point of parameter U on this line.
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//! For a line, the returned value is -U.
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Standard_EXPORT Standard_Real ReversedParameter (const Standard_Real U) const Standard_OVERRIDE;
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//! Returns RealFirst from Standard.
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Standard_EXPORT Standard_Real FirstParameter() const Standard_OVERRIDE;
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//! Returns RealLast from Standard
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Standard_EXPORT Standard_Real LastParameter() const Standard_OVERRIDE;
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//! Returns False
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Standard_EXPORT Standard_Boolean IsClosed() const Standard_OVERRIDE;
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//! Returns False
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Standard_EXPORT Standard_Boolean IsPeriodic() const Standard_OVERRIDE;
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//! Returns GeomAbs_CN, which is the global continuity of any line.
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Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE;
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//! Computes the distance between <me> and the point P.
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Standard_EXPORT Standard_Real Distance (const gp_Pnt2d& P) const;
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//! Returns True.
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Standard_EXPORT Standard_Boolean IsCN (const Standard_Integer N) const Standard_OVERRIDE;
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//! Returns in P the point of parameter U.
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//! P (U) = O + U * Dir where O is the "Location" point of the
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//! line and Dir the direction of the line.
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Standard_EXPORT void D0 (const Standard_Real U, gp_Pnt2d& P) const Standard_OVERRIDE;
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//! Returns the point P of parameter u and the first derivative V1.
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Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1) 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. V2 is a vector with null magnitude
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//! for a line.
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Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2) const Standard_OVERRIDE;
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//! V2 and V3 are vectors with null magnitude for a line.
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Standard_EXPORT void D3 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3) const Standard_OVERRIDE;
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//! For the point of parameter U of this line, computes
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//! the vector corresponding to the Nth derivative.
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//! Note: if N is greater than or equal to 2, the result is a
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//! vector with null magnitude.
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//! Exceptions Standard_RangeError if N is less than 1.
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Standard_EXPORT gp_Vec2d DN (const Standard_Real U, const Standard_Integer N) const Standard_OVERRIDE;
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//! Applies the transformation T to this line.
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Standard_EXPORT void Transform (const gp_Trsf2d& T) Standard_OVERRIDE;
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//! Computes the parameter on the line transformed by
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//! T for the point of parameter U on this line.
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//! For a line, the returned value is equal to U multiplied
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//! by the scale factor of transformation T.
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Standard_EXPORT virtual Standard_Real TransformedParameter (const Standard_Real U, const gp_Trsf2d& T) const Standard_OVERRIDE;
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//! Returns the coefficient required to compute the
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//! parametric transformation of this line when
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//! transformation T is applied. This coefficient is the
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//! ratio between the parameter of a point on this line
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//! and the parameter of the transformed point on the
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//! new line transformed by T.
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//! For a line, the returned value is the scale factor of the transformation T.
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Standard_EXPORT virtual Standard_Real ParametricTransformation (const gp_Trsf2d& T) const Standard_OVERRIDE;
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//! Creates a new object, which is a copy of this line.
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Standard_EXPORT Handle(Geom2d_Geometry) Copy() const Standard_OVERRIDE;
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DEFINE_STANDARD_RTTIEXT(Geom2d_Line,Geom2d_Curve)
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protected:
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private:
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gp_Ax2d pos;
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};
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#endif // _Geom2d_Line_HeaderFile
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