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1 // attitude_indicator.hxx - a vacuum-powered attitude indicator.
2 // Written by David Megginson, started 2002.
3 //
4 // This file is in the Public Domain and comes with no warranty.
5
6
7 #ifndef __INSTRUMENTS_ATTITUDE_INDICATOR_HXX
8 #define __INSTRUMENTS_ATTITUDE_INDICATOR_HXX 1
9
10 #ifndef __cplusplus
11 # error This library requires C++
12 #endif
13
14 #include <simgear/misc/props.hxx>
15 #include <Main/fgfs.hxx>
16
17 #include "gyro.hxx"
18
19
20 /**
21  * Model a vacuum-powered attitude indicator.
22  *
23  * This first, simple draft is hard-wired to vacuum pump #1.
24  *
25  * Input properties:
26  *
27  * /instrumentation/attitude-indicator/serviceable
28  * /orientation/pitch-deg
29  * /orientation/roll-deg
30  * /systems/vacuum[0]/suction-inhg
31  *
32  * Output properties:
33  *
34  * /instrumentation/attitude-indicator/indicated-pitch-deg
35  * /instrumentation/attitude-indicator/indicated-roll-deg
36  */
37 class AttitudeIndicator : public FGSubsystem
38 {
39
40 public:
41
42     AttitudeIndicator ();
43     virtual ~AttitudeIndicator ();
44
45     virtual void init ();
46     virtual void bind ();
47     virtual void unbind ();
48     virtual void update (double dt);
49
50 private:
51
52     Gyro _gyro;
53
54     SGPropertyNode_ptr _pitch_in_node;
55     SGPropertyNode_ptr _roll_in_node;
56     SGPropertyNode_ptr _suction_node;
57     SGPropertyNode_ptr _pitch_out_node;
58     SGPropertyNode_ptr _roll_out_node;
59     
60 };
61
62 #endif // __INSTRUMENTS_ATTITUDE_INDICATOR_HXX