-- Created on: 1992-10-13
-- Created by: Laurent BUCHARD
-- Copyright (c) 1992-1999 Matra Datavision
-- Copyright (c) 1999-2014 OPEN CASCADE SAS
--
-- This file is part of Open CASCADE Technology software library.
--
-- This library is free software; you can redistribute it and / or modify it
-- under the terms of the GNU Lesser General Public version 2.1 as published
-- by the Free Software Foundation, with special exception defined in the file
-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
-- distribution for complete text of the license and disclaimer of any warranty.
--
-- Alternatively, this file may be used under the terms of Open CASCADE
-- commercial license or contractual agreement.
generic class ProjPCurGen from IntCurve (
TheCurve as any;
TheCurveTool as any) -- as CurveTool from IntCurve(TheCurve)
---Purpose: this class provide a tool which computes the parameter
-- of a point near a parametric curve.
---Level: Internal
uses Pnt2d from gp,
Vec2d from gp,
POnCurv2d from Extrema
class TheCurveLocator instantiates CurveLocator from Extrema (
TheCurve,
TheCurveTool,
TheCurve,
TheCurveTool,
POnCurv2d from Extrema,
Pnt2d from gp);
class TheLocateExtPC instantiates GenLocateExtPC from Extrema (
TheCurve,
TheCurveTool,
POnCurv2d from Extrema,
Pnt2d from gp,
Vec2d from gp);
is
FindParameter(myclass; C: TheCurve;
Pnt: Pnt2d from gp;
Tol: Real from Standard)
--- Purpose: Returns the parameter V of the point on the
-- parametric curve corresponding to the Point Pnt.
-- The Correspondance between Pnt and the point P(V)
-- on the parametric curve must be coherent with the
-- way of determination of the signed distance
-- between a point and the implicit curve.
-- Tol is the tolerance on the distance between a point
-- and the parametrised curve.
-- In that case, no bounds are given. The research of
-- the rigth parameter has to be made on the natural
-- parametric domain of the curve.
returns Real from Standard;
FindParameter(myclass; C: TheCurve;
Pnt: Pnt2d from gp;
LowParameter,HighParameter,Tol: Real from Standard)
--- Purpose: Returns the parameter V of the point on the
-- parametric curve corresponding to the Point Pnt.
-- The Correspondance between Pnt and the point P(V)
-- on the parametric curve must be coherent with the
-- way of determination of the signed distance
-- between a point and the implicit curve.
-- Tol is the tolerance on the distance between a point
-- and the parametrised curve.
-- LowParameter and HighParameter give the
-- boundaries of the interval in wich the parameter
-- certainly lies. These parameters are given to
-- implement a more efficient algoritm. So, it is not
-- necessary to check that the returned value verifies
-- LowParameter <= Value <= HighParameter.
returns Real from Standard;
end ProjPCurGen;