smoothHeaviside.H

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    Copyright (C) 2007-2019 PCOpt/NTUA
    Copyright (C) 2013-2019 FOSS GP
    Copyright (C) 2019 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::smoothHeaviside
 
Description
    A smooth Heaviside function to project the signed distance field in 
    level set topology optimization.
 
\*---------------------------------------------------------------------------*/
 
#ifndef smoothHeaviside_H
#define smoothHeaviside_H
 
#include "topOInterpolationFunction.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                        Class smoothHeaviside Declaration
\*---------------------------------------------------------------------------*/
 
class smoothHeaviside
:
    public topOInterpolationFunction
{
protected:
 
    // Protected Data Members
 
        autoPtr<Function1<scalar>> b_;
 
 
private:
    
    // Private Member Functions
 
        //- No copy construct
        smoothHeaviside(const smoothHeaviside&) = delete;
 
        //- No copy assignment
        void operator=(const smoothHeaviside&) = delete;
 
 
public:
 
    //- Runtime type information
    TypeName("smoothHeaviside");
 
 
    // Constructors
 
        //- Construct from mesh and dictionary
        smoothHeaviside
        (
            const fvMesh& mesh,
            const dictionary& dict
        );
 
 
    // Destructor
    virtual ~smoothHeaviside() = default;
 
 
    // Member Functions
 
        //- Interpolate argument to result
        virtual void interpolate
        (
            const scalarField& arg,
            scalarField& res
        ) const;
 
        //- Return of function with respect to the argument field
        virtual tmp<scalarField> derivative(const scalarField& arg) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //