EulerCoordinateRotation.C

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     \\/     M anipulation  |
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License
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    for more details.

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#include "EulerCoordinateRotation.H"

#include "mathematicalConstants.H"
#include "addToRunTimeSelectionTable.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
    defineTypeNameAndDebug(EulerCoordinateRotation, 0);
    addToRunTimeSelectionTable
    (
        coordinateRotation,
        EulerCoordinateRotation,
        dictionary
    );
    addToRunTimeSelectionTable
    (
        coordinateRotation,
        EulerCoordinateRotation,
        points
    );
}


// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //

void Foam::EulerCoordinateRotation::calcTransform
(
    const scalar phiAngle,
    const scalar thetaAngle,
    const scalar psiAngle,
    const bool inDegrees
)
{
    scalar phi   = phiAngle;
    scalar theta = thetaAngle;
    scalar psi   = psiAngle;

    if (inDegrees)
    {
        phi   *= constant::mathematical::pi/180.0;
        theta *= constant::mathematical::pi/180.0;
        psi   *= constant::mathematical::pi/180.0;
    }

    R_ =
    (
        tensor
        (
            cos(phi)*cos(psi) - sin(phi)*sin(psi)*cos(theta),
            -sin(phi)*cos(psi)*cos(theta) - cos(phi)*sin(psi),
            sin(phi)*sin(theta),

            cos(phi)*sin(psi)*cos(theta) + sin(phi)*cos(psi),
            cos(phi)*cos(psi)*cos(theta) - sin(phi)*sin(psi),
            -cos(phi)*sin(theta),

            sin(psi)*sin(theta),
            cos(psi)*sin(theta),
            cos(theta)
        )
    );

    Rtr_ = R_.T();
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::EulerCoordinateRotation::EulerCoordinateRotation
(
    const dictionary& dict
)
:
    R_(sphericalTensor::I),
    Rtr_(R_)
{
    vector rotation(dict.lookup("rotation"));

    calcTransform
    (
        rotation.component(vector::X),
        rotation.component(vector::Y),
        rotation.component(vector::Z),
        dict.lookupOrDefault("degrees", true)
    );
}


Foam::EulerCoordinateRotation::EulerCoordinateRotation
(
    const dictionary& dict,
    const UList<vector>& points
)
:
    EulerCoordinateRotation(dict)
{}


// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //

Foam::vector Foam::EulerCoordinateRotation::transform(const vector& st) const
{
    return (R_ & st);
}


Foam::vector Foam::EulerCoordinateRotation::invTransform
(
    const vector& st
) const
{
    return (Rtr_ & st);
}


Foam::tmp<Foam::vectorField> Foam::EulerCoordinateRotation::transform
(
    const vectorField& st
) const
{
    NotImplemented;
    return tmp<vectorField>(nullptr);
}


Foam::tmp<Foam::vectorField> Foam::EulerCoordinateRotation::invTransform
(
    const vectorField& st
) const
{
    NotImplemented;
    return tmp<vectorField>(nullptr);
}


Foam::tmp<Foam::tensorField> Foam::EulerCoordinateRotation::transformTensor
(
    const tensorField& st
) const
{
     NotImplemented;
    return tmp<tensorField>(nullptr);
}


Foam::tensor Foam::EulerCoordinateRotation::transformTensor
(
    const tensor& st
) const
{
    return (R_ & st & Rtr_);
}


Foam::tmp<Foam::symmTensorField> Foam::EulerCoordinateRotation::
transformVector
(
    const vectorField& st
) const
{
    tmp<symmTensorField> tfld(new symmTensorField(st.size()));
    symmTensorField& fld = tfld.ref();

    forAll(fld, i)
    {
        fld[i] = transformPrincipal(R_, st[i]);
    }
    return tfld;
}


Foam::symmTensor Foam::EulerCoordinateRotation::transformVector
(
    const vector& st
) const
{
    return transformPrincipal(R_, st);
}


void Foam::EulerCoordinateRotation::write(Ostream& os) const
{
     writeEntry(os, "e1", e1());
     writeEntry(os, "e2", e2());
     writeEntry(os, "e3", e3());
}


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