1 // net_fdm.hxx -- defines a common net I/O interface to the flight
4 // Written by Curtis Olson - http://www.flightgear.org/~curt
5 // Started September 2001.
7 // This file is in the Public Domain, and comes with no warranty.
16 #include <time.h> // time_t
17 #include <simgear/misc/stdint.hxx>
19 // NOTE: this file defines an external interface structure. Due to
20 // variability between platforms and architectures, we only used fixed
21 // length types here. Specifically, integer types can vary in length.
22 // I am not aware of any platforms that don't use 4 bytes for float
23 // and 8 bytes for double.
25 const uint32_t FG_NET_FDM_VERSION = 23;
28 // Define a structure containing the top level flight dynamics model
41 uint32_t version; // increment when data values change
42 uint32_t padding; // padding
45 double longitude; // geodetic (radians)
46 double latitude; // geodetic (radians)
47 double altitude; // above sea level (meters)
48 float agl; // above ground level (meters)
49 float phi; // roll (radians)
50 float theta; // pitch (radians)
51 float psi; // yaw or true heading (radians)
52 float alpha; // angle of attack (radians)
53 float beta; // side slip angle (radians)
56 float phidot; // roll rate (radians/sec)
57 float thetadot; // pitch rate (radians/sec)
58 float psidot; // yaw rate (radians/sec)
59 float vcas; // calibrated airspeed
60 float climb_rate; // feet per second
61 float v_north; // north velocity in local/body frame, fps
62 float v_east; // east velocity in local/body frame, fps
63 float v_down; // down/vertical velocity in local/body frame, fps
64 float v_wind_body_north; // north velocity in local/body frame
65 // relative to local airmass, fps
66 float v_wind_body_east; // east velocity in local/body frame
67 // relative to local airmass, fps
68 float v_wind_body_down; // down/vertical velocity in local/body
69 // frame relative to local airmass, fps
72 float A_X_pilot; // X accel in body frame ft/sec^2
73 float A_Y_pilot; // Y accel in body frame ft/sec^2
74 float A_Z_pilot; // Z accel in body frame ft/sec^2
77 float stall_warning; // 0.0 - 1.0 indicating the amount of stall
78 float slip_deg; // slip ball deflection
83 uint32_t num_engines; // Number of valid engines
84 uint32_t eng_state[FG_MAX_ENGINES];// Engine state (off, cranking, running)
85 float rpm[FG_MAX_ENGINES]; // Engine RPM rev/min
86 float fuel_flow[FG_MAX_ENGINES]; // Fuel flow gallons/hr
87 float egt[FG_MAX_ENGINES]; // Exhuast gas temp deg F
88 float cht[FG_MAX_ENGINES]; // Cylinder head temp deg F
89 float mp_osi[FG_MAX_ENGINES]; // Manifold pressure
90 float tit[FG_MAX_ENGINES]; // Turbine Inlet Temperature
91 float oil_temp[FG_MAX_ENGINES]; // Oil temp deg F
92 float oil_px[FG_MAX_ENGINES]; // Oil pressure psi
95 uint32_t num_tanks; // Max number of fuel tanks
96 float fuel_quantity[FG_MAX_TANKS];
100 uint32_t wow[FG_MAX_WHEELS];
101 float gear_pos[FG_MAX_WHEELS];
102 float gear_steer[FG_MAX_WHEELS];
103 float gear_compression[FG_MAX_WHEELS];
106 uint32_t cur_time; // current unix time
107 // FIXME: make this uint64_t before 2038
108 int32_t warp; // offset in seconds to unix time
109 float visibility; // visibility in meters (for env. effects)
111 // Control surface positions (normalized values)
113 float elevator_trim_tab;
125 #endif // _NET_FDM_HXX