flightgear/src/Network/multiplay.hxx

// multiplay.hxx -- protocol object for multiplay in Flightgear
//
// Written by Diarmuid Tyson, started February 2003.
// diarmuid.tyson@airservicesaustralia.com
//
// With additions by Vivian Meazza, January 2006
//
// Copyright (C) 2003  Airservices Australia
//
// This program 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 2 of the
// License, or (at your option) any later version.
//
// This program 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//

#ifndef _FG_MULTIPLAY_HXX
#define _FG_MULTIPLAY_HXX

#define FG_MULTIPLAY_HID "$Id$"

#include <simgear/compiler.h>

#include STL_STRING

#include <simgear/scene/model/model.hxx>

#include <Main/globals.hxx>
#include <Main/fg_props.hxx>
#include <Model/acmodel.hxx>
#include <MultiPlayer/multiplaymgr.hxx>

#include "protocol.hxx"

SG_USING_STD(string);


/****************************************************************
* @version $Id$
*
* Description: FGMultiplay is an FGProtocol object used as the basic
* interface for the multiplayer code into FlightGears generic IO
* subsystem.  It only implements the basic FGProtocol methods: open(),
* process() and close().  It does not use Sim Gear's IO channels, as
* the MultiplayMgrs creates their own sockets through plib.
*
* It will set up it's direction and rate protocol properties when
* created.  Subsequent calls to process will prompt the
* MultiplayMgr to either send or receive data over the network.
*
******************************************************************/

#include <simgear/props/props.hxx>

class FGMultiplay : public FGProtocol {
public:

    /** Constructor */
    FGMultiplay (const string &dir, const int rate, const string &host, const int port);

    /** Destructor. */
    ~FGMultiplay ();

    /** Enables the FGMultiplay object. */
    bool open();

    /** Tells the multiplayer_mgr to send/receive data. */
    bool process();

    /** Closes the multiplayer_mgr. */
    bool close();

    
private:
    struct _node_cache {
        double val;
        SGPropertyNode_ptr node;
        _node_cache(double v, SGPropertyNode_ptr n) {
           val = v; node = n;
        };
    };

    /** calculate accelerations
    */
    void calcAcc(double speedN, double speedE, double speedD);

    double last_time ;                                //sec
    double last_speedN, last_speedE, last_speedD;     //fps
    double calcaccN, calcaccE, calcaccD;              //fps2

    SGPropertyNode *lat_n, *lon_n, *alt_n;
    SGPropertyNode *heading_n, *pitch_n, *roll_n;
    SGPropertyNode *speedN_n, *speedE_n, *speedD_n;
    SGPropertyNode *left_aileron_n, *right_aileron_n;
    SGPropertyNode *elevator_n, *rudder_n;
    // SGPropertyNode *rpms[5];
    SGPropertyNode *rateH_n, *rateR_n, *rateP_n;

    map<string,struct _node_cache*> props;
    map<string,struct _node_cache*>::iterator propit;
};
#endif // _FG_MULTIPLAY_HXX