chainjnttojacdotsolver.hpp

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/*
    Computes the Jacobian time derivative
    Copyright (C) 2015  Antoine Hoarau <hoarau [at] isir.upmc.fr>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/


#ifndef KDL_CHAINJNTTOJACDOTSOLVER_HPP
#define KDL_CHAINJNTTOJACDOTSOLVER_HPP

#include "solveri.hpp"
#include "frames.hpp"
#include "jntarrayvel.hpp"
#include "jacobian.hpp"
#include "chain.hpp"
#include "framevel.hpp"
#include "chainjnttojacsolver.hpp"
#include "chainfksolverpos_recursive.hpp"

namespace KDL
{

class ChainJntToJacDotSolver : public SolverI
{
public:
    static const int E_JAC_DOT_FAILED = -100;

    // Hybrid representation ref Frame: base, ref Point: end-effector
    static const int HYBRID = 0;
    // Body-fixed representation ref Frame: end-effector, ref Point: end-effector
    static const int BODYFIXED = 1;
    // Intertial representation ref Frame: base, ref Point: base
    static const int INTERTIAL = 2;

    explicit ChainJntToJacDotSolver(const Chain& chain);
    virtual ~ChainJntToJacDotSolver();
    virtual int JntToJacDot(const KDL::JntArrayVel& q_in, KDL::Twist& jac_dot_q_dot, int seg_nr = -1);
    virtual int JntToJacDot(const KDL::JntArrayVel& q_in, KDL::Jacobian& jdot, int seg_nr = -1);
    int setLockedJoints(const std::vector<bool> locked_joints);
    
    void setHybridRepresentation(){setRepresentation(HYBRID);}
    void setBodyFixedRepresentation(){setRepresentation(BODYFIXED);}
    void setInternialRepresentation(){setRepresentation(INTERTIAL);}
    void setRepresentation(const int& representation);
    
    virtual const char* strError(const int error) const;
protected:
    const Twist& getPartialDerivativeHybrid(const Jacobian& bs_J_ee,
                                     const unsigned int& joint_idx,
                                     const unsigned int& column_idx);
    const Twist& getPartialDerivativeBodyFixed(const Jacobian& ee_J_ee,
                                        const unsigned int& joint_idx,
                                        const unsigned int& column_idx);
    const Twist& getPartialDerivativeInertial(const Jacobian& bs_J_bs,
                                       const unsigned int& joint_idx,
                                       const unsigned int& column_idx);
    const Twist& getPartialDerivative(const Jacobian& J,
                               const unsigned int& joint_idx,
                               const unsigned int& column_idx,
                               const int& representation);
private:
    
    const Chain chain;
    std::vector<bool> locked_joints_;
    unsigned int nr_of_unlocked_joints_;
    ChainJntToJacSolver jac_solver_;
    Jacobian jac_;
    Jacobian jac_dot_;
    int representation_;
    ChainFkSolverPos_recursive fk_solver_;
    Frame F_bs_ee_;
    Twist jac_dot_k_;
    Twist jac_j_, jac_i_;
    Twist t_djdq_;
};

}
#endif