rotating_body.hpp

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#ifndef PERIAPSIS_SPACE_CARTO_BODY_H
#define PERIAPSIS_SPACE_CARTO_BODY_H

//
// $Id: rotating_body.hpp 2 2008-03-01 20:58:50Z kulibali $
//
// Copyright (c) 2008, The Periapsis Project. All rights reserved. 
// 
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// modification, are permitted provided that the following conditions are 
// met: 
// 
// * Redistributions of source code must retain the above copyright notice, 
//   this list of conditions and the following disclaimer. 
// 
// * Redistributions in binary form must reproduce the above copyright 
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// * Neither the name of the The Periapsis Project nor the names of its 
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 
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//

#include "space/space.hpp"
#include "data/broker.hpp"
#include "scenegraph/node.hpp"
#include "physics/physics_frame.hpp"

namespace periapsis
{

    namespace space
    {

        /// Base class for celestial body rotators.
        class SPACE_API body_rotator
            : public gsgl::data::brokered_object
        {
        public:        
            virtual void calc_orientation(double jdn, gsgl::math::transform & orientation, gsgl::math::vector & angular_velocity) = 0;

        protected:
            void calc_orientation_aux(double alpha, double delta, double W, gsgl::math::transform & orientation);
            void calc_angular_velocity_aux(double ang_diff, double d, const gsgl::math::transform & orientation, gsgl::math::vector & angular_velocity);
        }; // class body_rotator


        /// Implements bodies that are rotated using a body_rotator.
        class SPACE_API rotating_body
            : public gsgl::physics::physics_frame
        {
            body_rotator *rotator;

        public:
            rotating_body(const gsgl::string & name, gsgl::scenegraph::node *parent, body_rotator *rotator);
            virtual ~rotating_body();

            virtual void init(gsgl::scenegraph::context *);
            virtual void update(gsgl::scenegraph::context *);
        }; // class rotating_body

    } // namespace space

} // namespace periapsis

#endif

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