126 lines
4.2 KiB
C++
126 lines
4.2 KiB
C++
// net_fdm.hxx -- defines a common net I/O interface to the flight
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// dynamics model
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//
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// Written by Curtis Olson - http://www.flightgear.org/~curt
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// Started September 2001.
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//
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// This file is in the Public Domain, and comes with no warranty.
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//
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// $Id$
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#ifndef _NET_FDM_HXX
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#define _NET_FDM_HXX
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#include <time.h> // time_t
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#include <simgear/misc/stdint.hxx>
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// NOTE: this file defines an external interface structure. Due to
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// variability between platforms and architectures, we only used fixed
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// length types here. Specifically, integer types can vary in length.
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// I am not aware of any platforms that don't use 4 bytes for float
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// and 8 bytes for double.
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const uint32_t FG_NET_FDM_VERSION = 24;
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// Define a structure containing the top level flight dynamics model
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// parameters
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class FGNetFDM {
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public:
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enum {
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FG_MAX_ENGINES = 4,
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FG_MAX_WHEELS = 3,
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FG_MAX_TANKS = 4
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};
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uint32_t version; // increment when data values change
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uint32_t padding; // padding
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// Positions
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double longitude; // geodetic (radians)
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double latitude; // geodetic (radians)
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double altitude; // above sea level (meters)
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float agl; // above ground level (meters)
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float phi; // roll (radians)
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float theta; // pitch (radians)
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float psi; // yaw or true heading (radians)
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float alpha; // angle of attack (radians)
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float beta; // side slip angle (radians)
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// Velocities
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float phidot; // roll rate (radians/sec)
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float thetadot; // pitch rate (radians/sec)
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float psidot; // yaw rate (radians/sec)
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float vcas; // calibrated airspeed
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float climb_rate; // feet per second
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float v_north; // north velocity in local/body frame, fps
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float v_east; // east velocity in local/body frame, fps
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float v_down; // down/vertical velocity in local/body frame, fps
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float v_wind_body_north; // north velocity in local/body frame
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// relative to local airmass, fps
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float v_wind_body_east; // east velocity in local/body frame
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// relative to local airmass, fps
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float v_wind_body_down; // down/vertical velocity in local/body
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// frame relative to local airmass, fps
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// Accelerations
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float A_X_pilot; // X accel in body frame ft/sec^2
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float A_Y_pilot; // Y accel in body frame ft/sec^2
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float A_Z_pilot; // Z accel in body frame ft/sec^2
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// Stall
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float stall_warning; // 0.0 - 1.0 indicating the amount of stall
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float slip_deg; // slip ball deflection
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// Pressure
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// Engine status
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uint32_t num_engines; // Number of valid engines
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uint32_t eng_state[FG_MAX_ENGINES];// Engine state (off, cranking, running)
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float rpm[FG_MAX_ENGINES]; // Engine RPM rev/min
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float fuel_flow[FG_MAX_ENGINES]; // Fuel flow gallons/hr
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float fuel_px[FG_MAX_ENGINES]; // Fuel pressure psi
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float egt[FG_MAX_ENGINES]; // Exhuast gas temp deg F
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float cht[FG_MAX_ENGINES]; // Cylinder head temp deg F
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float mp_osi[FG_MAX_ENGINES]; // Manifold pressure
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float tit[FG_MAX_ENGINES]; // Turbine Inlet Temperature
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float oil_temp[FG_MAX_ENGINES]; // Oil temp deg F
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float oil_px[FG_MAX_ENGINES]; // Oil pressure psi
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// Consumables
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uint32_t num_tanks; // Max number of fuel tanks
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float fuel_quantity[FG_MAX_TANKS];
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// Gear status
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uint32_t num_wheels;
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uint32_t wow[FG_MAX_WHEELS];
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float gear_pos[FG_MAX_WHEELS];
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float gear_steer[FG_MAX_WHEELS];
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float gear_compression[FG_MAX_WHEELS];
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// Environment
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uint32_t cur_time; // current unix time
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// FIXME: make this uint64_t before 2038
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int32_t warp; // offset in seconds to unix time
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float visibility; // visibility in meters (for env. effects)
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// Control surface positions (normalized values)
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float elevator;
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float elevator_trim_tab;
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float left_flap;
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float right_flap;
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float left_aileron;
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float right_aileron;
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float rudder;
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float nose_wheel;
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float speedbrake;
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float spoilers;
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};
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#endif // _NET_FDM_HXX
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