1 // FGAILocalTraffic - AIEntity derived class with enough logic to
2 // fly and interact with the traffic pattern.
4 // Written by David Luff, started March 2002.
6 // Copyright (C) 2002 David C. Luff - david.luff@nottingham.ac.uk
8 // This program is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU General Public License as
10 // published by the Free Software Foundation; either version 2 of the
11 // License, or (at your option) any later version.
13 // This program is distributed in the hope that it will be useful, but
14 // WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #ifndef _FG_AILocalTraffic_HXX
23 #define _FG_AILocalTraffic_HXX
27 #include <simgear/math/point3d.hxx>
28 #include <Main/fg_props.hxx>
31 #include "AIPlane.hxx"
32 #include "ATCProjection.hxx"
51 struct StartOfDescent {
53 double x; // Runway aligned orthopos
57 class FGAILocalTraffic : public FGAIPlane {
65 bool Init(string ICAO, OperatingState initialState = PARKED, PatternLeg initialLeg = DOWNWIND);
67 // Run the internal calculations
68 void Update(double dt);
70 // Go out and practice circuits
71 void FlyCircuits(int numCircuits, bool tag);
73 // TODO - this will get more complex and moved into the main class
74 // body eventually since the position approved to taxi to will have
76 inline void ApproveTaxiRequest() {taxiRequestCleared = true;}
78 inline void DenyTaxiRequest() {taxiRequestCleared = false;}
80 void RegisterTransmission(int code);
82 // This is a hack and will probably go eventually
83 inline bool AtHoldShort() {return holdingShort;}
87 // Attempt to enter the traffic pattern in a reasonably intelligent manner
88 void EnterTrafficPattern(double dt);
90 // Do what is necessary to land and parkup at home airport
91 void ReturnToBase(double dt);
95 // This is purely for synactic convienience to avoid writing globals->get_ATC_mgr()-> all through the code!
98 OperatingState operatingState;
99 int circuitsToFly; //Number of circuits still to do in this session NOT INCLUDING THE CURRENT ONE
100 bool touchAndGo; //True if circuits should be flown touch and go, false for full stop
102 // Its possible that this might be moved out to the ground/airport class at some point.
103 FGATCAlignedProjection ortho; // Orthogonal mapping of the local area with the threshold at the origin
104 // and the runway aligned with the y axis.
106 // Airport/runway/pattern details
107 string airportID; // The ICAO code of the airport that we're operating around
108 double aptElev; // Airport elevation
109 FGGround* ground; // A pointer to the ground control.
110 FGTower* tower; // A pointer to the tower control.
112 double patternDirection; // 1 for right, -1 for left (This is double because we multiply/divide turn rates
113 // with it to get RH/LH turns - DON'T convert it to int under ANY circumstances!!
114 double glideAngle; // Assumed to be visual glidepath angle for FGAILocalTraffic - can be found at www.airnav.com
115 // Its conceivable that patternDirection and glidePath could be moved into the RunwayDetails structure.
117 // Performance characteristics of the plane in knots and ft/min - some of this might get moved out into FGAIPlane
119 double best_rate_of_climb_speed;
120 double best_rate_of_climb;
121 double nominal_climb_speed;
122 double nominal_climb_rate;
123 double nominal_circuit_speed;
124 double min_circuit_speed;
125 double max_circuit_speed;
126 double nominal_descent_rate;
127 double nominal_approach_speed;
128 double nominal_final_speed;
129 double stall_speed_landing_config;
130 double nominal_taxi_speed;
132 // Physical/rendering stuff
133 double wheelOffset; // Height above ground at which we need to render the plane whilst taxiing
134 bool elevInitGood; // We have had at least one good elev reading
135 bool inAir; // True when off the ground
137 // environment - some of this might get moved into FGAIPlane
138 SGPropertyNode* wind_from_hdg; //degrees
139 SGPropertyNode* wind_speed_knots; //knots
141 // Pattern details that (may) change
142 int numInPattern; // Number of planes in the pattern (this might get more complicated if high performance GA aircraft fly a higher pattern eventually)
143 int numAhead; // More importantly - how many of them are ahead of us?
144 double distToNext; // And even more importantly, how near are we getting to the one immediately ahead?
145 //PatternLeg leg; // Our current position in the pattern - now moved to FGAIPlane
146 StartOfDescent SoD; // Start of descent calculated wrt wind, pattern size & altitude, glideslope etc
147 bool descending; // We're in the coming down phase of the pattern
148 double targetDescentRate; // m/s
151 // At the moment this assumes that all taxiing in is to gates (a loose term that includes
152 // any permitted parking spot) and that all taxiing out is to runways.
155 bool taxiRequestPending;
156 bool taxiRequestCleared;
158 double desiredTaxiHeading;
159 double taxiTurnRadius;
160 double nominalTaxiSpeed;
162 ground_network_path_type path; // a path through the ground network for the plane to taxi
163 unsigned int taxiPathPos; // position of iterator in taxi path when applicable
164 node* nextTaxiNode; // next node in taxi path
166 //Runway out_dest; //FIXME - implement this
168 bool reportReadyForDeparture; // set true when ATC has requested that the plane report when ready for departure
169 bool clearedToLineUp;
170 bool clearedToTakeOff;
171 bool liningUp; // Set true when the turn onto the runway heading is commenced when taxiing out
172 bool contactTower; // we have been told to contact tower
173 bool contactGround; // we have been told to contact ground
174 bool changeFreq; // true when we need to change frequency
175 atc_type changeFreqType; // the service we need to change to
176 double responseCounter; // timer in seconds to allow response to requests to be a little while after them
178 void FlyTrafficPattern(double dt);
180 // TODO - need to add something to define what option we are flying - Touch and go / Stop and go / Landing properly / others?
182 void TransmitPatternPositionReport();
184 void CalculateSoD(double base_leg_pos, double downwind_leg_pos, bool pattern_direction);
186 void ExitRunway(Point3D orthopos);
190 void Taxi(double dt);
192 void GetNextTaxiNode();
196 void GetRwyDetails();
199 #endif // _FG_AILocalTraffic_HXX