searchableSurface.H

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    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2018 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::searchableSurface
 
Description
    Base class of (analytical or triangulated) surface.
    Encapsulates all the search routines. WIP.
 
    Information returned is usually a pointIndexHit:
    - bool  : was intersection/nearest found?
    - point : intersection point or nearest point
    - index : unique index on surface (e.g. triangle for triSurfaceMesh)
 
SourceFiles
    searchableSurface.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_searchableSurface_H
#define Foam_searchableSurface_H
 
#include "pointField.H"
#include "boundBox.H"
#include "typeInfo.H"
#include "runTimeSelectionTables.H"
#include "pointIndexHit.H"
#include "line.H"
#include "objectRegistry.H"
#include "volumeType.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class objectRegistry;
class mapDistribute;
class treeBoundBox;
 
/*---------------------------------------------------------------------------*\
                      Class searchableSurface Declaration
\*---------------------------------------------------------------------------*/
 
class searchableSurface
:
    public regIOobject
{
    // Private data
 
        const word name_;
 
        boundBox bounds_;
 
 
    // Private Member Functions
 
        //- No copy construct
        searchableSurface(const searchableSurface&) = delete;
 
        //- No copy assignment
        void operator=(const searchableSurface&) = delete;
 
 
public:
 
    //- Runtime type information
    TypeName("searchableSurface");
 
    // Declare run-time constructor selection table
 
        // For the dictionary constructor
        declareRunTimeSelectionTable
        (
            autoPtr,
            searchableSurface,
            dict,
            (
                const IOobject& io,
                const dictionary& dict
            ),
            (io, dict)
        );
 
 
        //- Class used for the read-construction of
        //  PtrLists of searchableSurface.
        class iNew
        {
            IOobject& io_;
 
        public:
 
            iNew(IOobject& io)
            :
                io_(io)
            {}
 
            autoPtr<searchableSurface> operator()(Istream& is) const
            {
                word surfaceType(is);
                word readName(is);
                dictionary dict(is);
 
                autoPtr<IOobject> namedIO(io_.clone());
                namedIO().rename(readName);
                return searchableSurface::New(surfaceType, namedIO(), dict);
            }
        };
 
 
    // Constructors
 
        searchableSurface(const IOobject& io);
 
        //- Clone
        virtual autoPtr<searchableSurface> clone() const
        {
            NotImplemented;
            return nullptr;
        }
 
 
    // Selectors
 
        //- Return a reference to the selected searchableSurface
        static autoPtr<searchableSurface> New
        (
            const word& surfaceType,
            const IOobject& io,
            const dictionary& dict
        );
 
 
    //- Destructor
    virtual ~searchableSurface() = default;
 
 
    // Member Functions
 
        //- Is object global
        virtual bool global() const
        {
            return true;
        }
 
        //- Return complete path + object name if the file exists
        //  either in the case/processor or case otherwise null
        virtual fileName filePath() const
        {
            return globalFilePath(type());
        }
 
        //- Return const reference to boundBox
        virtual const boundBox& bounds() const
        {
            return bounds_;
        }
 
        //- Return non-const access to the boundBox to allow it to be set.
        virtual boundBox& bounds()
        {
            return bounds_;
        }
 
        //- Names of regions
        virtual const wordList& regions() const = 0;
 
        //- Whether supports volume type (below).
        //  This is false for the base class.
        virtual bool hasVolumeType() const;
 
        //- If surface supports volume queries, what is type of points outside
        //  bounds
        virtual volumeType outsideVolumeType() const = 0;
 
        //- Range of local indices that can be returned
        virtual label size() const = 0;
 
        //- Range of global indices that can be returned
        virtual label globalSize() const
        {
            return size();
        }
 
        //- Get representative set of element coordinates
        //  Usually the element centres (should be of length size()).
        virtual tmp<pointField> coordinates() const = 0;
 
        //- 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 = 0;
 
        //- Get the points that define the surface.
        virtual tmp<pointField> points() const = 0;
 
        //- Does any part of the surface overlap the supplied bound box?
        virtual bool overlaps(const boundBox& bb) const = 0;
 
        // Single point queries.

            //virtual pointIndexHit findNearest
            //(
            //    const point& sample,
            //    const scalar nearestDistSqr
            //) const = 0;
            //
            //virtual pointIndexHit findNearestOnEdge
            //(
            //    const point& sample,
            //    const scalar nearestDistSqr
            //) const = 0;
            //
            //virtual pointIndexHit findNearest
            //(
            //    const linePointRef& ln,
            //    treeBoundBox& tightest,
            //    point& linePoint
            //) const = 0;
            //
            //virtual pointIndexHit findLine
            //(
            //    const point& start,
            //    const point& end
            //) const = 0;
            //
            //virtual pointIndexHit findLineAny
            //(
            //    const point& start,
            //    const point& end
            //) const = 0;
 
 
        // Multiple point queries. When surface is distributed the index
        // should be a global index. Not done yet.
 
            virtual void findNearest
            (
                const pointField& sample,
                const scalarField& nearestDistSqr,
                List<pointIndexHit>&
            ) const = 0;
 
            //- Find the nearest locations for the supplied points to a
            //  particular region in the searchable surface.
            virtual void findNearest
            (
                const pointField& samples,
                const scalarField& nearestDistSqr,
                const labelList& regionIndices,
                List<pointIndexHit>& info
            ) const
            {
                findNearest(samples, nearestDistSqr, info);
            }
 
            //- Find first intersection on segment from start to end.
            //  Note: searchableSurfacesQueries expects no
            //  intersection to be found if start==end. Is problem?
            virtual void findLine
            (
                const pointField& start,
                const pointField& end,
                List<pointIndexHit>&
            ) const = 0;
 
            //- Return any intersection on segment from start to end.
            virtual void findLineAny
            (
                const pointField& start,
                const pointField& end,
                List<pointIndexHit>&
            ) const = 0;
 
            //- Get all intersections in order from start to end.
            virtual void findLineAll
            (
                const pointField& start,
                const pointField& end,
                List<List<pointIndexHit>>&
            ) const = 0;
 
            //- From a set of points and indices get the region
            virtual void getRegion
            (
                const List<pointIndexHit>&,
                labelList& region
            ) const = 0;
 
            //- From a set of points and indices get the normal
            virtual void getNormal
            (
                const List<pointIndexHit>&,
                vectorField& normal
            ) const = 0;
 
            //- Determine type (inside/outside) for point.
            //  Unknown if cannot be determined (e.g. non-manifold surface)
            virtual void getVolumeType
            (
                const pointField&,
                List<volumeType>&
            ) const = 0;
 
            //- Find nearest, normal and region. Can be overridden with
            //  optimised implementation
            virtual void findNearest
            (
                const pointField& sample,
                const scalarField& nearestDistSqr,
                List<pointIndexHit>&,
                vectorField& normal,
                labelList& region
            ) const;
 
 
        // Other
 
            //- Set bounds of surface. Bounds currently set as list of
            //  bounding boxes. The bounds are hints to the surface as for
            //  the range of queries it can expect. faceMap/pointMap can be
            //  set if the surface has done any redistribution.
            virtual void distribute
            (
                const List<treeBoundBox>&,
                const bool keepNonLocal,
                autoPtr<mapDistribute>& faceMap,
                autoPtr<mapDistribute>& pointMap
            )
            {}
 
            //- WIP. Store element-wise field.
            virtual void setField(const labelList& values)
            {}
 
            //- WIP. From a set of hits (points and
            //  indices) get the specified field. Misses do not get set. Return
            //  empty field if not supported.
            virtual void getField(const List<pointIndexHit>&, labelList& values)
            const
            {
                values.clear();
            }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
//- Global file type for searchableSurface
template<>
struct is_globalIOobject<searchableSurface> : std::true_type {};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //