Square.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2016-2017 OpenFOAM Foundation
-------------------------------------------------------------------------------
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
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    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::Function1Types::Square
 
Description
    Templated square-wave function with support for an offset level.
 
        \f[
            a square(f (t - t_0)) s + l
        \f]
 
    where
 
    \f$ square(t) \f$ is the square-wave function in range \f$ [-1, 1] \f$
    with a mark/space ratio of \f$ r \f$
 
    \vartable
        symbol  | Description       | Data type         | Default
        a       | Amplitude         | Function1<scalar> |
        f       | Frequency [1/s]   | Function1<scalar> |
        s       | Type scale factor | Function1<Type>   |
        l       | Type offset level | Function1<Type>   |
        t_0     | Start time [s]    | scalar            | 0
        r       | mark/space ratio  | scalar            | 1
        t       | Time [s]          | scalar
    \endvartable
 
    Example for a scalar:
    \verbatim
        <entryName> square;
        <entryName>Coeffs
        {
            frequency 10;
            amplitude 0.1;
            scale     2e-6;
            level     2e-6;
        }
    \endverbatim
 
    Example for a vector:
    \verbatim
        <entryName> square;
        <entryName>Coeffs
        {
            frequency 10;
            amplitude 1;
            scale     (1 0.1 0);
            level     (10 1 0);
        }
    \endverbatim
 
SourceFiles
    Square.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Square_H
#define Square_H
 
#include "Function1.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace Function1Types
{
 
/*---------------------------------------------------------------------------*\
                           Class Square Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type>
class Square
:
    public Function1<Type>
{
    // Private Data
 
        //- Start-time for the square function
        scalar t0_;
 
        //- Mark/space ratio of the square function
        scalar markSpace_;
 
        //- Scalar amplitude of the square function
        autoPtr<Function1<scalar>> amplitude_;
 
        //- Frequency of the square function
        autoPtr<Function1<scalar>> frequency_;
 
        //- Scaling factor of the square function
        autoPtr<Function1<Type>> scale_;
 
        //- Level to which the square function is added
        autoPtr<Function1<Type>> level_;
 
 
    // Private Member Functions
 
        //- Read the coefficients from the given dictionary
        void read(const dictionary& coeffs);
 
        //- No copy assignment
        void operator=(const Square<Type>&) = delete;
 
 
public:
 
    // Runtime type information
    TypeName("square");
 
 
    // Constructors
 
        //- Construct from entry name and dictionary
        Square
        (
            const word& entryName,
            const dictionary& dict
        );
 
        //- Copy constructor
        explicit Square(const Square<Type>& rhs);
 
 
    //- Destructor
    virtual ~Square() = default;
 
 
    // Member Functions
 
        //- Return value for time t
        virtual inline Type value(const scalar t) const;
 
        //- Write in dictionary format
        virtual void writeData(Ostream& os) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Function1Types
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "SquareI.H"
 
#ifdef NoRepository
    #include "Square.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //