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#ifndef  body_INC
#define  body_INC
#include <Eigen/Dense>
#include <iostream>
using Eigen::Matrix;
using Eigen::Vector3d;
using Eigen::Quaternion;

/*
 * =====================================================================================
 *        Class:  Body
 *  Description:  State representation of body.
 * =====================================================================================
 */
class Body
{
    public:
        /* ====================  LIFECYCLE     ======================================= */
        Body (){};                             /* constructor */

        /* ====================  ACCESSORS     ======================================= */

        /* ====================  MUTATORS      ======================================= */

        /* ====================  OPERATORS     ======================================= */
        void motionModel ( Matrix<double,9,1> &X, const Vector3d &acc, const Vector3d &ang, const Quaternion<double> &q, const double dt);
        void skewSymmetric(const Vector3d &x, Matrix<double,3,3> &y);

    protected:
        /* ====================  METHODS       ======================================= */

        /* ====================  DATA MEMBERS  ======================================= */

    private:
        /* ====================  METHODS       ======================================= */

        /* ====================  DATA MEMBERS  ======================================= */

}; /* -----  end of class Body  ----- */


#endif   /* ----- #ifndef body_INC  ----- */