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213 lines
7.4 KiB
Plaintext
213 lines
7.4 KiB
Plaintext
-- Created on: 1998-08-17
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-- Created by: Philippe MANGIN
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-- Copyright (c) 1998-1999 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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class EvolvedSection from GeomFill inherits SectionLaw from GeomFill
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---Purpose: Define an Constant Section Law
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uses
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Curve from Geom,
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BSplineSurface from Geom,
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BSplineCurve from Geom,
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Function from Law,
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Shape from GeomAbs,
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Pnt from gp,
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Array1OfPnt from TColgp,
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Array1OfVec from TColgp,
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Array1OfInteger from TColStd,
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Array1OfReal from TColStd
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raises
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OutOfRange
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is
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Create(C : Curve from Geom;
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L : Function from Law)
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---Purpose: Make an SectionLaw with a Curve and a real Law.
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returns EvolvedSection from GeomFill;
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--
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--========== To compute Sections and derivatives Sections
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--
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D0(me : mutable;
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Param: Real;
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Poles : out Array1OfPnt from TColgp;
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Weigths : out Array1OfReal from TColStd)
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---Purpose: compute the section for v = param
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returns Boolean is redefined;
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D1(me : mutable;
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Param: Real;
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Poles : out Array1OfPnt from TColgp;
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DPoles : out Array1OfVec from TColgp;
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Weigths : out Array1OfReal from TColStd;
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DWeigths : out Array1OfReal from TColStd)
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---Purpose: compute the first derivative in v direction of the
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-- section for v = param
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-- Warning : It used only for C1 or C2 aproximation
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returns Boolean
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is redefined;
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D2(me : mutable;
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Param: Real;
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Poles : out Array1OfPnt from TColgp;
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DPoles : out Array1OfVec from TColgp;
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D2Poles : out Array1OfVec from TColgp;
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Weigths : out Array1OfReal from TColStd;
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DWeigths : out Array1OfReal from TColStd;
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D2Weigths : out Array1OfReal from TColStd)
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---Purpose: compute the second derivative in v direction of the
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-- section for v = param
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-- Warning : It used only for C2 aproximation
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returns Boolean
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is redefined;
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BSplineSurface(me)
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---Purpose: give if possible an bspline Surface, like iso-v are the
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-- section. If it is not possible this methode have to
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-- get an Null Surface. Is it the default implementation.
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returns BSplineSurface from Geom
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is redefined;
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SectionShape(me; NbPoles : out Integer from Standard;
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NbKnots : out Integer from Standard;
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Degree : out Integer from Standard)
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---Purpose: get the format of an section
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is redefined;
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Knots(me; TKnots: out Array1OfReal from TColStd)
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---Purpose: get the Knots of the section
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is redefined;
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Mults(me; TMults: out Array1OfInteger from TColStd)
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---Purpose: get the Multplicities of the section
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is redefined;
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IsRational(me)
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---Purpose: Returns if the sections are rationnal or not
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returns Boolean is redefined;
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IsUPeriodic(me)
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---Purpose: Returns if the sections are periodic or not
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returns Boolean is redefined;
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IsVPeriodic(me)
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---Purpose: Returns if the law isperiodic or not
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returns Boolean is redefined;
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--
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-- =================== Management of continuity ===================
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--
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NbIntervals(me; S : Shape from GeomAbs)
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---Purpose: Returns the number of intervals for continuity
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-- <S>.
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-- May be one if Continuity(me) >= <S>
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returns Integer is redefined;
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Intervals(me; T : in out Array1OfReal from TColStd;
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S : Shape from GeomAbs)
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---Purpose: Stores in <T> the parameters bounding the intervals
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-- of continuity <S>.
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--
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-- The array must provide enough room to accomodate
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-- for the parameters. i.e. T.Length() > NbIntervals()
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raises
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OutOfRange from Standard
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is redefined;
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SetInterval(me: mutable; First, Last: Real from Standard)
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---Purpose: Sets the bounds of the parametric interval on
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-- the function
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-- This determines the derivatives in these values if the
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-- function is not Cn.
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is redefined;
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GetInterval(me; First, Last: out Real from Standard)
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---Purpose: Gets the bounds of the parametric interval on
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-- the function
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is redefined;
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GetDomain(me; First, Last: out Real from Standard)
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---Purpose: Gets the bounds of the function parametric domain.
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-- Warning: This domain it is not modified by the
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-- SetValue method
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is redefined;
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-- ===================== To help computation of Tolerance ======
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-- Evaluation of error, in 2d space, or on rational function, is
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-- difficult. The following methods can help the approximation to
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-- make good evaluation and use good tolerances.
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--
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-- It is not necessary for the following informations to be very
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-- precise. A fast evaluation is sufficient.
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GetTolerance(me;
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BoundTol, SurfTol, AngleTol : Real;
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Tol3d : out Array1OfReal)
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---Purpose: Returns the tolerances associated at each poles to
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-- reach in approximation, to satisfy: BoundTol error
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-- at the Boundary AngleTol tangent error at the
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-- Boundary (in radian) SurfTol error inside the
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-- surface.
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is redefined;
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BarycentreOfSurf(me)
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---Purpose: Get the barycentre of Surface.
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-- An very poor estimation is sufficent.
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-- This information is usefull to perform well
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-- conditioned rational approximation.
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-- Warning: Used only if <me> IsRational
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returns Pnt from gp
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is redefined;
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MaximalSection(me) returns Real
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---Purpose: Returns the length of the greater section. This
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-- information is usefull to G1's control.
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-- Warning: With an little value, approximation can be slower.
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is redefined;
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GetMinimalWeight(me; Weigths : out Array1OfReal from TColStd)
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---Purpose: Compute the minimal value of weight for each poles
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-- in all sections.
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-- This information is usefull to control error
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-- in rational approximation.
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-- Warning: Used only if <me> IsRational
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is redefined;
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IsConstant(me; Error : out Real)
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---Purpose: return True If the Law isConstant
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returns Boolean
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is redefined;
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ConstantSection(me)
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---Purpose: Return the constant Section if <me> IsConstant.
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--
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returns Curve from Geom
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is redefined;
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fields
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First, Last : Real;
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mySection : Curve from Geom;
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myLaw : Function from Law;
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TLaw : Function from Law;
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myCurve : BSplineCurve from Geom;
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end EvolvedSection;
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