159 lines
6.7 KiB
C++
159 lines
6.7 KiB
C++
// Created on: 1991-04-03
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// Created by: Remi GILET
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// Copyright (c) 1991-1999 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 _GccAna_Lin2d2Tan_HeaderFile
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#define _GccAna_Lin2d2Tan_HeaderFile
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#include "Standard.hxx"
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#include "Standard_DefineAlloc.hxx"
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#include "Standard_Integer.hxx"
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#include "TColgp_Array1OfLin2d.hxx"
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#include "GccEnt_Array1OfPosition.hxx"
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#include "TColgp_Array1OfPnt2d.hxx"
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#include "TColStd_Array1OfReal.hxx"
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#include "GccEnt_Position.hxx"
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class gp_Pnt2d;
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class GccEnt_QualifiedCirc;
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class gp_Lin2d;
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//! This class implements the algorithms used to
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//! create 2d lines tangent to 2 other elements which
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//! can be circles or points.
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//! Describes functions for building a 2D line:
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//! - tangential to 2 circles, or
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//! - tangential to a circle and passing through a point, or
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//! - passing through 2 points.
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//! A Lin2d2Tan object provides a framework for:
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//! - defining the construction of 2D line(s),
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//! - implementing the construction algorithm, and
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//! consulting the result(s).
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//! Some constructors may check the type of the qualified argument
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//! and raise BadQualifier Error in case of incorrect couple (qualifier,
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//! curv).
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//! For example: "EnclosedCirc".
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class GccAna_Lin2d2Tan
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! This methods implements the algorithms used to
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//! create 2d lines passing through 2 points.
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//! Tolerance is used because we can't create a line
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//! when the distance between the two points is too small.
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Standard_EXPORT GccAna_Lin2d2Tan(const gp_Pnt2d& ThePoint1,
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const gp_Pnt2d& ThePoint2,
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const Standard_Real Tolerance);
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//! This methods implements the algorithms used to
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//! create 2d lines tangent to one circle and passing
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//! through a point.
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//! Exception BadQualifier is raised in the case of
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//! EnclosedCirc
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//! Tolerance is used because there is no solution
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//! when the point is inside the solution according to
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//! the tolerance.
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Standard_EXPORT GccAna_Lin2d2Tan(const GccEnt_QualifiedCirc& Qualified1,
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const gp_Pnt2d& ThePoint,
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const Standard_Real Tolerance);
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//! This methods implements the algorithms used to
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//! create 2d lines tangent to 2 circles.
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//! Exception BadQualifier is raised in the case of
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//! EnclosedCirc
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Standard_EXPORT GccAna_Lin2d2Tan(const GccEnt_QualifiedCirc& Qualified1,
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const GccEnt_QualifiedCirc& Qualified2,
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const Standard_Real Tolerance);
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//! This method returns true when there is a solution
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//! and false in the other cases.
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Standard_EXPORT Standard_Boolean IsDone() const;
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//! This method returns the number of solutions.
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//! Raises NotDone if the construction algorithm didn't succeed.
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Standard_EXPORT Standard_Integer NbSolutions() const;
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//! Returns the solution number Index and raises OutOfRange
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//! exception if Index is greater than the number of solutions.
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//! Be careful: the Index is only a way to get all the
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//! solutions, but is not associated to these outside the
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//! context of the algorithm-object. Raises OutOfRange is raised if Index is greater than
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//! the number of solutions.
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//! It raises NotDone if the algorithm failed.
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Standard_EXPORT gp_Lin2d ThisSolution(const Standard_Integer Index) const;
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//! Returns the qualifiers Qualif1 and Qualif2 of the
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//! tangency arguments for the solution of index Index
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//! computed by this algorithm.
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//! The returned qualifiers are:
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//! - those specified at the start of construction when the
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//! solutions are defined as enclosing or outside with
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//! respect to the arguments, or
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//! - those computed during construction (i.e. enclosing or
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//! outside) when the solutions are defined as unqualified
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//! with respect to the arguments, or
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//! - GccEnt_noqualifier if the tangency argument is a point.
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//! Exceptions
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//! Standard_OutOfRange if Index is less than zero or
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//! greater than the number of solutions computed by this algorithm.
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//! StdFail_NotDone if the construction fails.
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Standard_EXPORT void WhichQualifier(const Standard_Integer Index,
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GccEnt_Position& Qualif1,
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GccEnt_Position& Qualif2) const;
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//! Returns information about the tangency point between the
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//! result number Index and the first argument.
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//! ParSol is the intrinsic parameter of the point PntSol on
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//! the solution curv.
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//! ParArg is the intrinsic parameter of the point PntSol on
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//! the argument curv. Raises OutOfRange is raised if Index is greater than
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//! the number of solutions.
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//! It raises NotDone if the algorithm failed.
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Standard_EXPORT void Tangency1(const Standard_Integer Index,
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Standard_Real& ParSol,
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Standard_Real& ParArg,
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gp_Pnt2d& PntSol) const;
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//! Returns information about the tangency point between the
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//! result number Index and the second argument.
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//! ParSol is the intrinsic parameter of the point ParSol on
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//! the solution curv.
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//! ParArg is the intrinsic parameter of the point PntSol on
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//! the argument curv. Raises OutOfRange is raised if Index is greater than
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//! the number of solutions.
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//! It raises NotDone if the algorithm failed.
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Standard_EXPORT void Tangency2(const Standard_Integer Index,
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Standard_Real& ParSol,
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Standard_Real& ParArg,
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gp_Pnt2d& PntSol) const;
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protected:
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private:
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Standard_Boolean WellDone;
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Standard_Integer NbrSol;
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TColgp_Array1OfLin2d linsol;
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GccEnt_Array1OfPosition qualifier1;
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GccEnt_Array1OfPosition qualifier2;
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TColgp_Array1OfPnt2d pnttg1sol;
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TColgp_Array1OfPnt2d pnttg2sol;
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TColStd_Array1OfReal par1sol;
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TColStd_Array1OfReal par2sol;
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TColStd_Array1OfReal pararg1;
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TColStd_Array1OfReal pararg2;
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};
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#endif // _GccAna_Lin2d2Tan_HeaderFile
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