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42cf5bc1ca
Automatic upgrade of OCCT code by command "occt_upgrade . -nocdl": - WOK-generated header files from inc and sources from drv are moved to src - CDL files removed - All packages are converted to nocdlpack
91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
// Created on: 1997-05-13
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// Created by: Stagiaire Francois DUMONT
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// Copyright (c) 1997-1999 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 _GeomLib_DenominatorMultiplier_HeaderFile
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#define _GeomLib_DenominatorMultiplier_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Standard_Handle.hxx>
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#include <TColStd_Array1OfReal.hxx>
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#include <Standard_Real.hxx>
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class Geom_BSplineSurface;
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class Standard_OutOfRange;
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class Standard_ConstructionError;
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//! this defines an evaluator for a function of 2 variables
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//! that will be used by CancelDenominatorDerivative in one
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//! direction.
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class GeomLib_DenominatorMultiplier
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! if the surface is rational this will define the evaluator
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//! of a real function of 2 variables a(u,v) such that
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//! if we define a new surface by :
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//! a(u,v) * N(u,v)
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//! NewF(u,v) = ----------------
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//! a(u,v) * D(u,v)
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Standard_EXPORT GeomLib_DenominatorMultiplier(const Handle(Geom_BSplineSurface)& Surface, const TColStd_Array1OfReal& KnotVector);
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//! Returns the value of
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//! a(UParameter,VParameter)=
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//!
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//! H0(UParameter)/Denominator(Umin,Vparameter)
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//!
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//! D Denominator(Umin,Vparameter)
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//! - ------------------------------[H1(u)]/(Denominator(Umin,Vparameter)^2)
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//! D U
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//!
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//! + H3(UParameter)/Denominator(Umax,Vparameter)
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//!
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//! D Denominator(Umax,Vparameter)
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//! - ------------------------------[H2(u)]/(Denominator(Umax,Vparameter)^2)
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//! D U
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Standard_EXPORT Standard_Real Value (const Standard_Real UParameter, const Standard_Real VParameter) const;
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protected:
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private:
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Handle(Geom_BSplineSurface) mySurface;
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TColStd_Array1OfReal myKnotFlatVector;
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};
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#endif // _GeomLib_DenominatorMultiplier_HeaderFile
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