1 // FGAIBase.hxx - abstract base class for AI objects
2 // Written by David Culp, started Nov 2003, based on
3 // David Luff's FGAIEntity class.
4 // - davidculp2@comcast.net
6 // This program is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU General Public License as
8 // published by the Free Software Foundation; either version 2 of the
9 // License, or (at your option) any later version.
11 // This program is distributed in the hope that it will be useful, but
12 // WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the Free Software
18 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef _FG_AIBASE_HXX
21 #define _FG_AIBASE_HXX
25 #include <simgear/constants.h>
26 #include <simgear/math/point3d.hxx>
27 #include <simgear/scene/model/placement.hxx>
29 #include <Main/fg_props.hxx>
40 // can be aircraft, ship, storm, thermal or ballistic
48 double repeat; // in seconds
49 double latitude; // used if no flightplan defined
50 double longitude; // used if no flightplan defined
51 double altitude; // used if no flightplan defined
52 double speed; // used if no flightplan defined
53 double heading; // used if no flightplan defined
54 double roll; // used if no flightplan defined
55 double azimuth; // used by ballistic objects
56 double elevation; // used by ballistic objects
57 double rudder; // used by ship objects
58 double strength; // used by thermal objects
59 double diameter; // used by thermal objects
60 double height_msl; // used by thermal objects
61 double eda; // used by ballistic objects
62 double life; // life span in seconds
63 double buoyancy; // acceleration in ft per sec2
64 double wind_from_east; // in feet per second
65 double wind_from_north; // in feet per second
66 double cd; // coefficient of drag
67 bool wind; // if true, model reacts to parent wind
68 double mass; // in slugs
69 bool aero_stabilised; // if true, ballistic object aligns with trajectory
79 virtual void update(double dt);
80 inline Point3D GetPos() { return(pos); }
82 enum object_type { otNull = 0, otAircraft, otShip, otBallistic,
83 otRocket, otStorm, otThermal,
84 MAX_OBJECTS }; // Needs to be last!!!
88 virtual void unbind();
90 void setPath( const char* model );
91 void setSpeed( double speed_KTAS );
92 void setAltitude( double altitude_ft );
93 void setHeading( double heading );
94 void setLatitude( double latitude );
95 void setLongitude( double longitude );
96 void setBank( double bank );
99 void setDie( bool die );
104 SGPropertyNode *props;
105 FGAIManager* manager;
107 // these describe the model's actual state
108 Point3D pos; // WGS84 lat & lon in degrees, elev above sea-level in meters
109 double hdg; // True heading in degrees
110 double roll; // degrees, left is negative
111 double pitch; // degrees, nose-down is negative
112 double speed; // knots true airspeed
113 double altitude; // meters above sea level
114 double vs; // vertical speed, feet per minute
116 double ft_per_deg_lon;
117 double ft_per_deg_lat;
119 // these describe the model's desired state
120 double tgt_heading; // target heading, degrees true
121 double tgt_altitude; // target altitude, *feet* above sea level
122 double tgt_speed; // target speed, KTAS
128 // these describe radar information for the user
129 bool in_range; // true if in range of the radar, otherwise false
130 double bearing; // true bearing from user to this model
131 double elevation; // elevation in degrees from user to this model
132 double range; // range from user to this model, nm
133 double rdot; // range rate, in knots
134 double horiz_offset; // look left/right from user to me, deg
135 double vert_offset; // look up/down from user to me, deg
136 double x_shift; // value used by radar display instrument
137 double y_shift; // value used by radar display instrument
138 double rotation; // value used by radar display instrument
141 string model_path; //Path to the 3D model
142 ssgBranch * model; //The 3D model object
143 SGModelPlacement aip;
152 double UpdateRadar(FGAIManager* manager);
160 object_type getType();
161 bool isa( object_type otype );
163 double _getVS_fps() const;
164 void _setVS_fps( double _vs );
166 double _getAltitude() const;
167 void _setAltitude( double _alt );
169 void _setLongitude( double longitude );
170 void _setLatitude ( double latitude );
172 double _getLongitude() const;
173 double _getLatitude () const;
175 double _getBearing() const;
176 double _getElevation() const;
177 double _getRdot() const;
178 double _getH_offset() const;
179 double _getV_offset() const;
180 double _getX_shift() const;
181 double _getY_shift() const;
182 double _getRotation() const;
185 double T; // temperature, degs farenheit
186 double p; // pressure lbs/sq ft
187 double a; // speed of sound at altitude (ft/s)
188 double Mach; // Mach number
190 static const double e;
191 static const double lbs_to_slugs;
195 inline double _getRange() { return range; };
197 static bool _isNight();
201 inline void FGAIBase::setPath( const char* model ) {
202 model_path.append(model);
205 inline void FGAIBase::setSpeed( double speed_KTAS ) {
206 speed = tgt_speed = speed_KTAS;
209 inline void FGAIBase::setHeading( double heading ) {
210 hdg = tgt_heading = heading;
213 inline void FGAIBase::setAltitude( double altitude_ft ) {
214 altitude = tgt_altitude = altitude_ft;
215 pos.setelev(altitude * SG_FEET_TO_METER);
218 inline void FGAIBase::setBank( double bank ) {
219 roll = tgt_roll = bank;
223 inline void FGAIBase::setLongitude( double longitude ) {
224 pos.setlon( longitude );
226 inline void FGAIBase::setLatitude ( double latitude ) {
227 pos.setlat( latitude );
230 inline void FGAIBase::setDie( bool die ) { delete_me = die; }
231 inline bool FGAIBase::getDie() { return delete_me; }
233 inline FGAIBase::object_type FGAIBase::getType() { return _otype; }
235 inline void* FGAIBase::getID() { return this; }
237 #endif // _FG_AIBASE_HXX