net_fdm_mini.hxx

Go to the documentation of this file.

// net_fdm_mini.hxx -- defines a simple subset I/O interface to the flight
//                     dynamics model variables
//
// Written by Curtis Olson - http://www.flightgear.org/~curt
// Started January 2002.
//
// This file is in the Public Domain, and comes with no warranty.
//
// $Id$
 
 
#ifndef _NET_FDM_MINI_HXX
#define _NET_FDM_MINI_HXX
 
 
#ifndef __cplusplus                                                          
# error This library requires C++
#endif                                   
 
#include <simgear/misc/stdint.hxx>
 
// NOTE: this file defines an external interface structure.  Due to
// variability between platforms and architectures, we only used fixed
// length types here.  Specifically, integer types can vary in length.
// I am not aware of any platforms that don't use 4 bytes for float
// and 8 bytes for double.
 
 
const uint32_t FG_NET_FDM_MINI_VERSION = 2;
 
 
// Define a structure containing the top level flight dynamics model
// parameters
 
class FGNetMiniFDM {
 
public:
 
    enum {
        FG_MAX_ENGINES = 4,
        FG_MAX_WHEELS = 3,
        FG_MAX_TANKS = 4
    };
 
    uint32_t version;            // increment when data values change
 
    // Positions
    double longitude;          // geodetic (radians)
    double latitude;            // geodetic (radians)
    double altitude;            // above sea level (meters)
    double agl;                      // above ground level (meters)
    double phi;                      // roll (radians)
    double theta;          // pitch (radians)
    double psi;                      // yaw or true heading (radians)
 
    // Velocities
    double vcas;
    double climb_rate;                // feet per second
 
    // Consumables
    uint32_t num_tanks;                // Max number of fuel tanks
    double fuel_quantity[FG_MAX_TANKS];
 
    // Environment
    uint32_t cur_time;            // current unix time
    int32_t warp;                 // offset in seconds to unix time
};
 
 
#endif // _NET_FDM_MINI_HXX