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100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
// Created on: 1993-12-24
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// Created by: Jacques GOUSSARD
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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 _Law_Function_HeaderFile
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#define _Law_Function_HeaderFile
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#include <Standard.hxx>
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#include <Standard_Type.hxx>
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#include <Standard_Transient.hxx>
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#include <GeomAbs_Shape.hxx>
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#include <Standard_Integer.hxx>
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#include <TColStd_Array1OfReal.hxx>
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#include <Standard_Real.hxx>
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class Standard_OutOfRange;
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class Law_Function;
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DEFINE_STANDARD_HANDLE(Law_Function, Standard_Transient)
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//! Root class for evolution laws.
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class Law_Function : public Standard_Transient
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{
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public:
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Standard_EXPORT virtual GeomAbs_Shape Continuity() const = 0;
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//! Returns the number of intervals for continuity
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//! <S>. May be one if Continuity(me) >= <S>
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Standard_EXPORT virtual Standard_Integer NbIntervals (const GeomAbs_Shape S) const = 0;
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//! 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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Standard_EXPORT virtual void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const = 0;
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//! Returns the value of the function at the point of parameter X.
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Standard_EXPORT virtual Standard_Real Value (const Standard_Real X) = 0;
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//! Returns the value F and the first derivative D of the
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//! function at the point of parameter X.
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Standard_EXPORT virtual void D1 (const Standard_Real X, Standard_Real& F, Standard_Real& D) = 0;
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//! Returns the value, first and seconde derivatives
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//! at parameter X.
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Standard_EXPORT virtual void D2 (const Standard_Real X, Standard_Real& F, Standard_Real& D, Standard_Real& D2) = 0;
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//! Returns a law 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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//! It is usfule to determines the derivatives
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//! in these values <First> and <Last> if
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//! the Law is not Cn.
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Standard_EXPORT virtual Handle(Law_Function) Trim (const Standard_Real PFirst, const Standard_Real PLast, const Standard_Real Tol) const = 0;
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//! Returns the parametric bounds of the function.
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Standard_EXPORT virtual void Bounds (Standard_Real& PFirst, Standard_Real& PLast) = 0;
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DEFINE_STANDARD_RTTIEXT(Law_Function,Standard_Transient)
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protected:
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private:
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};
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#endif // _Law_Function_HeaderFile
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