/*---------------------------------------------------------------------------*\
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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::sampledSets::arcUniform

Description
    Uniform samples along an arc

Usage
    \table
        Property    | Description                            | Req'd? | Default
        centre      | Centre of the circle                   | yes    |
        normal      | Direction normal to the plane of the circle  | yes |
        radial      | Vector from the centre to a point on the arc | yes |
        startAngle  | The angle of the start of the arc in radians | yes |
        endAngle    | The angle of the end of the arc in radians | yes |
        nPoints     | The number of points                   | yes    |
        axis        | The coordinate axis that is written    | yes    |
    \endtable

    Example specification:
    \verbatim
    {
        type        arcUniform;
        centre      (0.95 0 0.25);
        normal      (1 0 0);
        radial      (0 0 0.25);
        startAngle  -1.57079633;
        endAngle    0.52359878;
        nPoints     200;
        axis        x;
    }
    \endverbatim

SourceFiles
    arcUniform.C

\*---------------------------------------------------------------------------*/

#ifndef arcUniform_H
#define arcUniform_H

#include "sampledSet.H"
#include "DynamicList.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{
namespace sampledSets
{

/*---------------------------------------------------------------------------*\
                         Class arcUniform Declaration
\*---------------------------------------------------------------------------*/

class arcUniform
:
    public sampledSet
{
    // Private Data

        // Arc definition

            //- Centre of the circle of which the arc is a part
            const point centre_;

            //- Normal direction to the circle of which the arc is a part
            const vector normal_;

            //- Radial vector from the centre to the point on the arc from
            //  which the angles are measured
            const vector radial_;

            //- Start angle
            const scalar startAngle_;

            //- End angle
            const scalar endAngle_;

            //- Number of points spaced along the arc
            const label nPoints_;


    // Private Member Functions

        //- Calculate all the sampling points
        virtual bool calcSamples
        (
            DynamicList<point>& samplingPositions,
            DynamicList<scalar>& samplingDistances,
            DynamicList<label>& samplingSegments,
            DynamicList<label>& samplingCells,
            DynamicList<label>& samplingFaces
        ) const;


public:

    //- Runtime type information
    TypeName("arcUniform");


    // Constructors

        //- Construct from dictionary
        arcUniform
        (
            const word& name,
            const polyMesh& mesh,
            const dictionary& dict
        );


    //- Destructor
    virtual ~arcUniform();
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace sampledSets
} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //