parcelSelectionDetail.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2018 OpenCFD Ltd.
-------------------------------------------------------------------------------
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::Detail::parcelSelection
 
Description
    Selection of parcels based on their objectRegistry entries.
    Normally accessed via a dictionary entry.
 
    Example sub-dictionary entry
    \verbatim
    selection
    {
        stride
        {
            // every 10th parcelId
            action  use;
            source  stride;
            stride  10;
        }
        injector
        {
            // Only output from injectorID == 1
            action  subset;
            source  field;
            field   typeId;
            accept  (equal 1);
        }
        Umin
        {
            // Remove slow parcels
            action  subtract;
            source  field;
            field   U;
            accept  (less 1e-3);
        }
        diam
        {
            // Only particular diameter ranges
            action  subset;
            source  field;
            field   d;
            accept  (greater 1e-5) and (less 1e-3);
        }
    }
    \endverbatim
 
    \heading Entry type
    \table
        Property    | Description                           | Required | Default
        action      | all/clear/invert/ignore add/subtract/subset/use | yes |
        source      | field/stride                          | mostly  |
    \endtable
 
    \heading Stride source
    \table
        Property    | Description                           | Required | Default
        stride      | The stride for the parcel id          | yes |
    \endtable
 
    \heading Field source
    \table
        Property    | Description                           | Required | Default
        field       | The label/scalar/vector field name    | yes |
        accept      | Acceptance or test criterion          | yes |
    \endtable
 
    The \c accept criterion has two forms:
      -# single expression
         - (expr)
      -# composite expression
         - (expr) or (expr)
         - (expr) and (expr)
 
    The expressions are a (op scalar) pair that form a unary scalar
    predicate. The \a op is one of the following:
    - lt, less
    - le, lessEq
    - gt, greater
    - ge, greaterEq
    - eq, equal
    - neq, notEqual
 
    For example,
    \verbatim
    accept  (less 10);
    accept  (less 10) or (greater 100);
    accept  (ge 10) and (le 20);
    \endverbatim
 
See also
    Foam::predicates::scalars
    Foam::functionObjects::vtkCloud
 
SourceFiles
    parcelSelectionDetail.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef parcelSelectionDetail_H
#define parcelSelectionDetail_H
 
#include "bitSet.H"
#include "Enum.H"
#include "objectRegistry.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace Detail
{
 
/*---------------------------------------------------------------------------*\
                   Class Detail::parcelSelection Declaration
\*---------------------------------------------------------------------------*/
 
class parcelSelection
{
public:
 
    //- Enumeration defining the valid selection actions
    enum actionType
    {
        ALL,                
        CLEAR,              
        INVERT,             
        ADD,                
        SUBTRACT,           
        SUBSET,             
        USE,                
        IGNORE,             
    };
 
    //- Names for the actionType
    static const Enum<actionType> actionNames;
 
 
    //- Enumeration defining the valid sources
    enum sourceType
    {
        FIELD,              
        STRIDE              
    };
 
    //- Names for the sourceType
    static const Enum<sourceType> sourceNames;
 
 
    //- Enumeration defining and/or logic
    enum logicType { AND, OR };
 
    //- Names for the logicType
    static const Enum<logicType> logicNames;
 
 
protected:
 
    // Protected data
 
        //- The filtered parcel addressing. Eg, for the current cloud.
        dictionary parcelSelect_;
 
        //- The filtered parcel addressing. Eg, for the current cloud.
        bitSet parcelAddr_;
 
 
    // Protected Member Functions
 
        //- Calculate parcel selection filter.
        //  \return True if the filter is applicable
        bool calculateFilter
        (
            const objectRegistry& obrTmp,
            const bool log = true
        );
 
public:
 
    // Constructors
 
        //- Construct null
        parcelSelection();
 
 
    //- Destructor
    virtual ~parcelSelection() = default;
 
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Detail
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //