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1 // net_ctrls.hxx -- defines a common net I/O interface to the flight
2 //                  sim controls
3 //
4 // Written by Curtis Olson - http://www.flightgear.org/~curt
5 // Started July 2001.
6 //
7 // This file is in the Public Domain, and comes with no warranty.
8 //
9 // $Id$
10
11
12 #ifndef _NET_CTRLS_HXX
13 #define _NET_CTRLS_HXX
14
15 #include <simgear/misc/stdint.hxx>
16
17 // NOTE: this file defines an external interface structure.  Due to
18 // variability between platforms and architectures, we only used fixed
19 // length types here.  Specifically, integer types can vary in length.
20 // I am not aware of any platforms that don't use 4 bytes for float
21 // and 8 bytes for double.
22
23 //    !!! IMPORTANT !!!
24 /* There is some space reserved in the protocol for future use.
25  * When adding a new type, add it just before the "reserved" definition
26  * and subtract the size of this new type from the RESERVED_SPACE definition
27  * (1 for (u)int32_t or float and 2 for double).
28  *      
29  * This way the protocol will be forward and backward compatible until
30  * RESERVED_SPACE becomes zero.
31  */
32
33 #define RESERVED_SPACE 25
34 const uint32_t FG_NET_CTRLS_VERSION = 27;
35
36
37 // Define a structure containing the control parameters
38
39 class FGNetCtrls {
40
41 public:
42
43     enum {
44         FG_MAX_ENGINES = 4,
45         FG_MAX_WHEELS = 16,
46         FG_MAX_TANKS = 8
47     };
48
49     uint32_t version;                    // increment when data values change
50
51     // Aero controls
52     double aileron;                      // -1 ... 1
53     double elevator;                     // -1 ... 1
54     double rudder;                       // -1 ... 1
55     double aileron_trim;                 // -1 ... 1
56     double elevator_trim;                // -1 ... 1
57     double rudder_trim;                  // -1 ... 1
58     double flaps;                        //  0 ... 1
59     double spoilers;
60     double speedbrake;
61
62     // Aero control faults
63     uint32_t flaps_power;                 // true = power available
64     uint32_t flap_motor_ok;
65
66     // Engine controls
67     uint32_t num_engines;                // number of valid engines
68     uint32_t master_bat[FG_MAX_ENGINES];
69     uint32_t master_alt[FG_MAX_ENGINES];
70     uint32_t magnetos[FG_MAX_ENGINES];
71     uint32_t starter_power[FG_MAX_ENGINES];// true = starter power
72     double throttle[FG_MAX_ENGINES];     //  0 ... 1
73     double mixture[FG_MAX_ENGINES];      //  0 ... 1
74     double condition[FG_MAX_ENGINES];    //  0 ... 1
75     uint32_t fuel_pump_power[FG_MAX_ENGINES];// true = on
76     double prop_advance[FG_MAX_ENGINES]; //  0 ... 1
77     uint32_t feed_tank_to[4];
78     uint32_t reverse[4];
79
80
81     // Engine faults
82     uint32_t engine_ok[FG_MAX_ENGINES];
83     uint32_t mag_left_ok[FG_MAX_ENGINES];
84     uint32_t mag_right_ok[FG_MAX_ENGINES];
85     uint32_t spark_plugs_ok[FG_MAX_ENGINES];  // false = fouled plugs
86     uint32_t oil_press_status[FG_MAX_ENGINES];// 0 = normal, 1 = low, 2 = full fail
87     uint32_t fuel_pump_ok[FG_MAX_ENGINES];
88
89     // Fuel management
90     uint32_t num_tanks;                      // number of valid tanks
91     uint32_t fuel_selector[FG_MAX_TANKS];    // false = off, true = on
92     uint32_t xfer_pump[5];                   // specifies transfer from array
93                                              // value tank to tank specified by
94                                              // int value
95     uint32_t cross_feed;                     // false = off, true = on
96
97     // Brake controls
98     double brake_left;
99     double brake_right;
100     double copilot_brake_left;
101     double copilot_brake_right;
102     double brake_parking;
103     
104     // Landing Gear
105     uint32_t gear_handle; // true=gear handle down; false= gear handle up
106
107     // Switches
108     uint32_t master_avionics;
109     
110         // nav and Comm
111     double      comm_1;
112     double      comm_2;
113     double      nav_1;
114     double      nav_2;
115
116     // wind and turbulance
117     double wind_speed_kt;
118     double wind_dir_deg;
119     double turbulence_norm;
120
121     // temp and pressure
122     double temp_c;
123     double press_inhg;
124
125     // other information about environment
126     double hground;                      // ground elevation (meters)
127     double magvar;                       // local magnetic variation in degs.
128
129     // hazards
130     uint32_t icing;                      // icing status could me much
131                                          // more complex but I'm
132                                          // starting simple here.
133
134     // simulation control
135     uint32_t speedup;                    // integer speedup multiplier
136     uint32_t freeze;                     // 0=normal
137                                          // 0x01=master
138                                          // 0x02=position
139                                          // 0x04=fuel
140
141     // --- New since FlightGear 0.9.10 (FG_NET_CTRLS_VERSION = 27)
142
143     // --- Add new variables just before this line.
144
145     uint32_t reserved[RESERVED_SPACE];   // 100 bytes reserved for future use.
146 };
147
148
149 #endif // _NET_CTRLS_HXX
150
151