// net_fdm.hxx -- defines a common net I/O interface to the flight
// dynamics model
//
-// Written by Curtis Olson, started September 2001.
+// Written by Curtis Olson - http://www.flightgear.org/~curt
+// Started September 2001.
//
-// Copyright (C) 2001 Curtis L. Olson - curt@flightgear.com
-//
-// 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.
+// This file is in the Public Domain, and comes with no warranty.
//
// $Id$
#define _NET_FDM_HXX
-#ifndef __cplusplus
-# error This library requires C++
-#endif
-
#include <time.h> // time_t
+#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 int FG_NET_FDM_VERSION = 11;
+const uint32_t FG_NET_FDM_VERSION = 24;
// Define a structure containing the top level flight dynamics model
public:
- int version; // increment when data values change
- int pad; // keep doubles 64-bit aligned for some
- // hardware platforms, such as the Sun
- // SPARC, which don't like misaligned
- // data
-
enum {
FG_MAX_ENGINES = 4,
FG_MAX_WHEELS = 3,
FG_MAX_TANKS = 4
};
+ uint32_t version; // increment when data values change
+ uint32_t padding; // padding
+
// 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)
+ float agl; // above ground level (meters)
+ float phi; // roll (radians)
+ float theta; // pitch (radians)
+ float psi; // yaw or true heading (radians)
+ float alpha; // angle of attack (radians)
+ float beta; // side slip angle (radians)
// Velocities
- double phidot; // roll rate (radians/sec)
- double thetadot; // pitch rate (radians/sec)
- double psidot; // yaw rate (radians/sec)
- double vcas; // calibrated airspeed
- double climb_rate; // feet per second
- double v_north; // north velocity in local/body frame, fps
- double v_east; // east velocity in local/body frame, fps
- double v_down; // down/vertical velocity in local/body frame, fps
- double v_wind_body_north; // north velocity in local/body frame
+ float phidot; // roll rate (radians/sec)
+ float thetadot; // pitch rate (radians/sec)
+ float psidot; // yaw rate (radians/sec)
+ float vcas; // calibrated airspeed
+ float climb_rate; // feet per second
+ float v_north; // north velocity in local/body frame, fps
+ float v_east; // east velocity in local/body frame, fps
+ float v_down; // down/vertical velocity in local/body frame, fps
+ float v_wind_body_north; // north velocity in local/body frame
// relative to local airmass, fps
- double v_wind_body_east; // east velocity in local/body frame
+ float v_wind_body_east; // east velocity in local/body frame
// relative to local airmass, fps
- double v_wind_body_down; // down/vertical velocity in local/body
+ float v_wind_body_down; // down/vertical velocity in local/body
// frame relative to local airmass, fps
- // Stall
- double stall_warning; // 0.0 - 1.0 indicating the amount of stall
-
// Accelerations
- double A_X_pilot; // X accel in body frame ft/sec^2
- double A_Y_pilot; // Y accel in body frame ft/sec^2
- double A_Z_pilot; // Z accel in body frame ft/sec^2
+ float A_X_pilot; // X accel in body frame ft/sec^2
+ float A_Y_pilot; // Y accel in body frame ft/sec^2
+ float A_Z_pilot; // Z accel in body frame ft/sec^2
+
+ // Stall
+ float stall_warning; // 0.0 - 1.0 indicating the amount of stall
+ float slip_deg; // slip ball deflection
// Pressure
// Engine status
- int num_engines; // Number of valid engines
- int eng_state[FG_MAX_ENGINES]; // Engine state (off, cranking, running)
- double rpm[FG_MAX_ENGINES]; // Engine RPM rev/min
- double fuel_flow[FG_MAX_ENGINES]; // Fuel flow gallons/hr
- double EGT[FG_MAX_ENGINES]; // Exhuast gas temp deg F
- double oil_temp[FG_MAX_ENGINES]; // Oil temp deg F
- double oil_px[FG_MAX_ENGINES]; // Oil pressure psi
+ uint32_t num_engines; // Number of valid engines
+ uint32_t eng_state[FG_MAX_ENGINES];// Engine state (off, cranking, running)
+ float rpm[FG_MAX_ENGINES]; // Engine RPM rev/min
+ float fuel_flow[FG_MAX_ENGINES]; // Fuel flow gallons/hr
+ float fuel_px[FG_MAX_ENGINES]; // Fuel pressure psi
+ float egt[FG_MAX_ENGINES]; // Exhuast gas temp deg F
+ float cht[FG_MAX_ENGINES]; // Cylinder head temp deg F
+ float mp_osi[FG_MAX_ENGINES]; // Manifold pressure
+ float tit[FG_MAX_ENGINES]; // Turbine Inlet Temperature
+ float oil_temp[FG_MAX_ENGINES]; // Oil temp deg F
+ float oil_px[FG_MAX_ENGINES]; // Oil pressure psi
// Consumables
- int num_tanks; // Max number of fuel tanks
- double fuel_quantity[FG_MAX_TANKS];
+ uint32_t num_tanks; // Max number of fuel tanks
+ float fuel_quantity[FG_MAX_TANKS];
- // Gear and flaps status
- int num_wheels;
- bool wow[FG_MAX_WHEELS];
- double flap_deflection; // normalized from 0 = up to 1 = full deflection
+ // Gear status
+ uint32_t num_wheels;
+ uint32_t wow[FG_MAX_WHEELS];
+ float gear_pos[FG_MAX_WHEELS];
+ float gear_steer[FG_MAX_WHEELS];
+ float gear_compression[FG_MAX_WHEELS];
// Environment
- time_t cur_time; // current unix time
- long int warp; // offset in seconds to unix time
- double visibility; // visibility in meters (for env. effects)
+ uint32_t cur_time; // current unix time
+ // FIXME: make this uint64_t before 2038
+ int32_t warp; // offset in seconds to unix time
+ float visibility; // visibility in meters (for env. effects)
+
+ // Control surface positions (normalized values)
+ float elevator;
+ float elevator_trim_tab;
+ float left_flap;
+ float right_flap;
+ float left_aileron;
+ float right_aileron;
+ float rudder;
+ float nose_wheel;
+ float speedbrake;
+ float spoilers;
};
projects / flightgear.git / blobdiff