cylinder_searchableSurface.H

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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::searchableSurfaces::cylinder
 
Description
    Surface geometry with a cylinder shape, which can be used with
    snappyHexMesh.
 
Usage
    \table
        Property  | Description                          | Required
        point1    | Point at one end of cylinder axis    | yes
        point2    | Point at other end of cylinder axis  | yes
        radius    | Cylinder radius                      | yes
    \endtable
 
    Example specification in snappyHexMeshDict/geometry:
    \verbatim
        type       cylinder;
        point1     (10  10  10);
        point2     (20  10  10);
        radius     5;
    \endverbatim
 
SourceFiles
    searchableCylinder.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef cylinder_searchableSurface_H
#define cylinder_searchableSurface_H
 
#include "treeBoundBox.H"
#include "searchableSurface.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace searchableSurfaces
{
 
/*---------------------------------------------------------------------------*\
                     Class cylinder Declaration
\*---------------------------------------------------------------------------*/
 
class cylinder
:
    public searchableSurface
{
    // Private Member Data
 
        //- 'left' point
        const point point1_;
 
        //- 'right' point
        const point point2_;
 
        //- Length of vector point2-point1
        const scalar magDir_;
 
        //- Normalised vector point2-point1
        const vector unitDir_;
 
        //- Radius squared
        const scalar radius_;
 
        //- Names of regions
        mutable wordList regions_;
 
 
    // Private Member Functions
 
        //- Inherit findNearest from searchableSurface
        using searchableSurface::findNearest;
 
        //- Find nearest point on cylinder.
        pointIndexHit findNearest
        (
            const point& sample,
            const scalar nearestDistSqr
        ) const;
 
        scalar radius2(const point& pt) const;
 
        //- Find intersection with cylinder
        void findLineAll
        (
            const point& start,
            const point& end,
            pointIndexHit& near,
            pointIndexHit& far
        ) const;
 
        //- Return the boundBox of the cylinder
        boundBox calcBounds() const;
 
 
public:
 
    //- Runtime type information
    TypeName("cylinder");
 
 
    // Constructors
 
        //- Construct from components
        cylinder
        (
            const IOobject& io,
            const point&,
            const point&,
            const scalar radius
        );
 
        //- Construct from dictionary (used by searchableSurface)
        cylinder
        (
            const IOobject& io,
            const dictionary& dict
        );
 
        //- Disallow default bitwise copy construction
        cylinder(const cylinder&) = delete;
 
 
    //- Destructor
    virtual ~cylinder();
 
 
    // Member Functions
 
        virtual const wordList& regions() const;
 
        //- Whether supports volume type below
        virtual bool hasVolumeType() const
        {
            return true;
        }
 
        //- Range of local indices that can be returned.
        virtual label size() const
        {
            return 1;
        }
 
        //- Get representative set of element coordinates
        //  Usually the element centres (should be of length size()).
        virtual tmp<pointField> coordinates() const;
 
        //- Get bounding spheres (centre and radius squared), one per element.
        //  Any point on element is guaranteed to be inside.
        virtual void boundingSpheres
        (
            pointField& centres,
            scalarField& radiusSqr
        ) const;
 
        //- Get the points that define the surface.
        virtual tmp<pointField> points() const;
 
        //- Does any part of the surface overlap the supplied bound box?
        virtual bool overlaps(const boundBox& bb) const
        {
            NotImplemented;
 
            return false;
        }
 
 
        // Multiple point queries.
 
            virtual void findNearest
            (
                const pointField& sample,
                const scalarField& nearestDistSqr,
                List<pointIndexHit>&
            ) const;
 
            virtual void findLine
            (
                const pointField& start,
                const pointField& end,
                List<pointIndexHit>&
            ) const;
 
            virtual void findLineAny
            (
                const pointField& start,
                const pointField& end,
                List<pointIndexHit>&
            ) const;
 
            //- Get all intersections in order from start to end.
            virtual void findLineAll
            (
                const pointField& start,
                const pointField& end,
                List<List<pointIndexHit>>&
            ) const;
 
            //- From a set of points and indices get the region
            virtual void getRegion
            (
                const List<pointIndexHit>&,
                labelList& region
            ) const;
 
            //- From a set of points and indices get the normal
            virtual void getNormal
            (
                const List<pointIndexHit>&,
                vectorField& normal
            ) const;
 
            //- Determine type (inside/outside/mixed) for point. unknown if
            //  cannot be determined (e.g. non-manifold surface)
            virtual void getVolumeType
            (
                const pointField&,
                List<volumeType>&
            ) const;
 
 
        // regIOobject implementation
 
            bool writeData(Ostream&) const
            {
                NotImplemented;
                return false;
            }
 
 
    // Member Operators
 
        //- Disallow default bitwise assignment
        void operator=(const cylinder&) = delete;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End of namespace searchableSurfaces
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //