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
19 typedef unsigned long uint32_t;
23 //--->>>#include <simgear/misc/stdint.hxx> //not required for JSBSim
26 // NOTE: this file defines an external interface structure. Due to
27 // variability between platforms and architectures, we only used fixed
28 // length types here. Specifically, integer types can vary in length.
29 // I am not aware of any platforms that don't use 4 bytes for float
30 // and 8 bytes for double.
32 const uint32_t FG_NET_FDM_VERSION = 24;
35 // Define a structure containing the top level flight dynamics model
48 uint32_t version; // increment when data values change
49 uint32_t padding; // padding
52 double longitude; // geodetic (radians)
53 double latitude; // geodetic (radians)
54 double altitude; // above sea level (meters)
55 float agl; // above ground level (meters)
56 float phi; // roll (radians)
57 float theta; // pitch (radians)
58 float psi; // yaw or true heading (radians)
59 float alpha; // angle of attack (radians)
60 float beta; // side slip angle (radians)
63 float phidot; // roll rate (radians/sec)
64 float thetadot; // pitch rate (radians/sec)
65 float psidot; // yaw rate (radians/sec)
66 float vcas; // calibrated airspeed
67 float climb_rate; // feet per second
68 float v_north; // north velocity in local/body frame, fps
69 float v_east; // east velocity in local/body frame, fps
70 float v_down; // down/vertical velocity in local/body frame, fps
71 float v_wind_body_north; // north velocity in local/body frame
72 // relative to local airmass, fps
73 float v_wind_body_east; // east velocity in local/body frame
74 // relative to local airmass, fps
75 float v_wind_body_down; // down/vertical velocity in local/body
76 // frame relative to local airmass, fps
79 float A_X_pilot; // X accel in body frame ft/sec^2
80 float A_Y_pilot; // Y accel in body frame ft/sec^2
81 float A_Z_pilot; // Z accel in body frame ft/sec^2
84 float stall_warning; // 0.0 - 1.0 indicating the amount of stall
85 float slip_deg; // slip ball deflection
90 uint32_t num_engines; // Number of valid engines
91 uint32_t eng_state[FG_MAX_ENGINES];// Engine state (off, cranking, running)
92 float rpm[FG_MAX_ENGINES]; // Engine RPM rev/min
93 float fuel_flow[FG_MAX_ENGINES]; // Fuel flow gallons/hr
94 float fuel_px[FG_MAX_ENGINES]; // Fuel pressure psi
95 float egt[FG_MAX_ENGINES]; // Exhuast gas temp deg F
96 float cht[FG_MAX_ENGINES]; // Cylinder head temp deg F
97 float mp_osi[FG_MAX_ENGINES]; // Manifold pressure
98 float tit[FG_MAX_ENGINES]; // Turbine Inlet Temperature
99 float oil_temp[FG_MAX_ENGINES]; // Oil temp deg F
100 float oil_px[FG_MAX_ENGINES]; // Oil pressure psi
103 uint32_t num_tanks; // Max number of fuel tanks
104 float fuel_quantity[FG_MAX_TANKS];
108 uint32_t wow[FG_MAX_WHEELS];
109 float gear_pos[FG_MAX_WHEELS];
110 float gear_steer[FG_MAX_WHEELS];
111 float gear_compression[FG_MAX_WHEELS];
114 uint32_t cur_time; // current unix time
115 // FIXME: make this uint64_t before 2038
116 int32_t warp; // offset in seconds to unix time
117 float visibility; // visibility in meters (for env. effects)
119 // Control surface positions (normalized values)
121 float elevator_trim_tab;
133 #endif // _NET_FDM_HXX