axisAngleRotation.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2018-2021 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
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    You should have received a copy of the GNU General Public License
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Class
    Foam::coordinateRotations::axisAngle
 
Description
    A coordinateRotation specified by a rotation axis and a rotation angle
    about that axis.
 
    \verbatim
    rotation
    {
        type        axisAngle;
        axis        (1 0 0);
        angle       90;
    }
    \endverbatim
 
    \heading Dictionary entries
    \table
        Property    | Description                           | Required | Default
        type        | Type name: axisAngle                  | yes   |
        axis        | Axis of rotation (vector)             | yes   |
        angle       | Rotation angle                        | yes   |
        degrees     | The angle is in degrees               | no    | true
    \endtable
 
Note
    The rotation axis will be normalized internally.
 
SourceFiles
    axisAngleRotation.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef coordinateRotations_axisAngle_H
#define coordinateRotations_axisAngle_H
 
#include "coordinateRotation.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace coordinateRotations
{
 
/*---------------------------------------------------------------------------*\
               Class coordinateRotations::axisAngle Declaration
\*---------------------------------------------------------------------------*/
 
class axisAngle
:
    public coordinateRotation
{
    // Private Data
 
        //- The rotation axis
        vector axis_;
 
        //- The rotation angle
        scalar angle_;
 
        //- Angle measured in degrees
        bool degrees_;
 
 
    // Private Member Functions
 
        //- Check specification for an identity rotation
        void checkSpec();
 
 
public:
 
    //- Runtime type information
    TypeNameNoDebug("axisAngle");
 
 
    // Constructors
 
        //- Default construct. Axis = Z, angle = 0.
        axisAngle();
 
        //- Copy construct
        axisAngle(const axisAngle& crot);
 
        //- Construct from axis and angle
        axisAngle(const vector& axis, scalar angle, bool degrees);
 
        //- Construct from x/y/z axis enumeration and angle
        axisAngle(const vector::components axis, scalar angle, bool degrees);
 
        //- Construct from dictionary
        explicit axisAngle(const dictionary& dict);
 
        //- Return clone
        autoPtr<coordinateRotation> clone() const
        {
            return
                autoPtr<coordinateRotation>::NewFrom
                <coordinateRotations::axisAngle>(*this);
        }
 
 
    //- Destructor
    virtual ~axisAngle() = default;
 
 
    // Static Member Functions
 
        //- The rotation tensor for given axis/angle
        static tensor rotation
        (
            const vector& axis,
            const scalar angle,
            bool degrees=false
        );
 
 
    // Member Functions
 
        //- Reset specification
        virtual void clear();
 
        //- Calculate and return the rotation tensor
        //- calculated from axis and angle
        virtual tensor R() const;
 
        //- Write information
        virtual void write(Ostream& os) const;
 
        //- Write dictionary entry
        virtual void writeEntry(const word& keyword, Ostream& os) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace coordinateRotations
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //