Rzyx.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2016-2018 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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.

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    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
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\*---------------------------------------------------------------------------*/

#include "Rzyx.H"
#include "rigidBodyModelState.H"
#include "addToRunTimeSelectionTable.H"

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

namespace Foam
{
namespace RBD
{
namespace joints
{
    defineTypeNameAndDebug(Rzyx, 0);

    addToRunTimeSelectionTable
    (
        joint,
        Rzyx,
        dictionary
    );
}
}
}


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

Foam::RBD::joints::Rzyx::Rzyx(const rigidBodyModel& model)
:
    joint(model, 3)
{
    S_[0] = spatialVector(0, 0, 1, 0, 0, 0);
    S_[1] = spatialVector(0, 1, 0, 0, 0, 0);
    S_[2] = spatialVector(1, 0, 0, 0, 0, 0);
}


Foam::RBD::joints::Rzyx::Rzyx
(
    const rigidBodyModel& model,
    const dictionary& dict
)
:
    joint(model, 3)
{
    S_[0] = spatialVector(0, 0, 1, 0, 0, 0);
    S_[1] = spatialVector(0, 1, 0, 0, 0, 0);
    S_[2] = spatialVector(1, 0, 0, 0, 0, 0);
}


Foam::autoPtr<Foam::RBD::joint> Foam::RBD::joints::Rzyx::clone() const
{
    return autoPtr<joint>(new Rzyx(*this));
}


// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //

Foam::RBD::joints::Rzyx::~Rzyx()
{}


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

void Foam::RBD::joints::Rzyx::jcalc
(
    joint::XSvc& J,
    const rigidBodyModelState& state
) const
{
    vector qj(state.q().block<vector>(qIndex_));

    scalar s0 = sin(qj.x());
    scalar c0 = cos(qj.x());
    scalar s1 = sin(qj.y());
    scalar c1 = cos(qj.y());
    scalar s2 = sin(qj.z());
    scalar c2 = cos(qj.z());

    J.X.E() = tensor
    (
        c0*c1,            s0*c1,           -s1,
        c0*s1*s2 - s0*c2, s0*s1*s2 + c0*c2, c1*s2,
        c0*s1*c2 + s0*s2, s0*s1*c2 - c0*s2, c1*c2
    );
    J.X.r() = Zero;

    J.S = Zero;
    J.S.xx() = -s1;
    J.S.xz() = 1;
    J.S.yx() = c1*s2;
    J.S.yy() = c2;
    J.S.zx() = c1*c2;
    J.S.zy() = -s2;

    vector qDotj(state.qDot().block<vector>(qIndex_));
    J.v = J.S & qDotj;

    J.c = spatialVector
    (
       -c1*qDotj.x()*qDotj.y(),

       -s1*s2*qDotj.x()*qDotj.y()
      + c1*c2*qDotj.x()*qDotj.z()
      - s2*qDotj.y()*qDotj.z(),

       -s1*c2*qDotj.x()*qDotj.y()
      - c1*s2*qDotj.x()*qDotj.z()
      - c2*qDotj.y()*qDotj.z(),

        0,
        0,
        0
    );
}


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