// FGAILocalTraffic - AIEntity derived class with enough logic to // fly and interact with the traffic pattern. // // Written by David Luff, started March 2002. // // Copyright (C) 2002 David C. Luff - david.luff@nottingham.ac.uk // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License as // published by the Free Software Foundation; either version 2 of the // License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. /***************************************************************** * * WARNING - Curt has some ideas about AI traffic so anything in here * may get rewritten or scrapped. Contact Curt curt@flightgear.org * before spending any time or effort on this code!!! * ******************************************************************/ #ifndef _FG_AILocalTraffic_HXX #define _FG_AILocalTraffic_HXX #include #include #include #include
#include "tower.hxx" #include "AIPlane.hxx" #include "ATCProjection.hxx" #include "ground.hxx" typedef enum PatternLeg { TAKEOFF_ROLL, CLIMBOUT, TURN1, CROSSWIND, TURN2, DOWNWIND, TURN3, BASE, TURN4, FINAL, LANDING_ROLL }; typedef enum TaxiState { TD_INBOUND, TD_OUTBOUND, TD_NONE }; typedef enum OperatingState { IN_PATTERN, TAXIING, PARKED }; // perhaps we could use an FGRunway instead of this typedef struct RunwayDetails { Point3D threshold_pos; Point3D end1ortho; // ortho projection end1 (the threshold ATM) Point3D end2ortho; // ortho projection end2 (the take off end in the current hardwired scheme) double mag_hdg; double mag_var; double hdg; // true runway heading int ID; // 1 -> 36 }; typedef struct StartofDescent { PatternLeg leg; double orthopos_x; double orthopos_y; }; class FGAILocalTraffic : public FGAIPlane { public: FGAILocalTraffic(); ~FGAILocalTraffic(); // Initialise void Init(); // Run the internal calculations void Update(double dt); // Go out and practice circuits void FlyCircuits(int numCircuits, bool tag); protected: // Attempt to enter the traffic pattern in a reasonably intelligent manner void EnterTrafficPattern(double dt); // Do what is necessary to land and parkup at home airport void ReturnToBase(double dt); private: // High-level stuff OperatingState operatingState; int circuitsToFly; //Number of circuits still to do in this session NOT INCLUDING THE CURRENT ONE bool touchAndGo; //True if circuits should be flown touch and go, false for full stop // Its possible that this might be moved out to the ground/airport class at some point. FGATCAlignedProjection ortho; // Orthogonal mapping of the local area with the threshold at the origin // and the runway aligned with the y axis. // Airport/runway/pattern details char* airportID; // The ICAO code of the airport that we're operating around FGGround airport; // FIXME FIXME FIXME This is a complete hardwired cop-out at the moment - we need to connect to the correct ground in the same way we do to the tower. FGTower* tower; // A pointer to the tower control. RunwayDetails rwy; double patternDirection; // 1 for right, -1 for left (This is double because we multiply/divide turn rates // with it to get RH/LH turns - DON'T convert it to int under ANY circumstances!! double glideAngle; // Assumed to be visual glidepath angle for FGAILocalTraffic - can be found at www.airnav.com // Its conceivable that patternDirection and glidePath could be moved into the RunwayDetails structure. // Performance characteristics of the plane in knots and ft/min - some of this might get moved out into FGAIPlane double Vr; double best_rate_of_climb_speed; double best_rate_of_climb; double nominal_climb_speed; double nominal_climb_rate; double nominal_circuit_speed; double min_circuit_speed; double max_circuit_speed; double nominal_descent_rate; double nominal_approach_speed; double nominal_final_speed; double stall_speed_landing_config; double nominal_taxi_speed; // Physical/rendering stuff double wheelOffset; // Height above ground at which we need to render the plane whilst taxiing // environment - some of this might get moved into FGAIPlane SGPropertyNode* wind_from_hdg; //degrees SGPropertyNode* wind_speed_knots; //knots // Pattern details that (may) change int numInPattern; // Number of planes in the pattern (this might get more complicated if high performance GA aircraft fly a higher pattern eventually) int numAhead; // More importantly - how many of them are ahead of us? double distToNext; // And even more importantly, how near are we getting to the one immediately ahead? PatternLeg leg; // Out current position in the pattern StartofDescent SoD; // Start of descent calculated wrt wind, pattern size & altitude, glideslope etc // Taxiing details // At the moment this assumes that all taxiing in is to gates (a loose term that includes // any permitted parking spot) and that all taxiing out is to runways. bool parked; bool taxiing; TaxiState taxiState; double desiredTaxiHeading; double taxiTurnRadius; double nominalTaxiSpeed; Gate* in_dest; ground_network_path_type path; // a path through the ground network for the plane to taxi int taxiPathPos; // position of iterator in taxi path when applicable node* nextTaxiNode; // next node in taxi path //Runway out_dest; //FIXME - implement this void FlyTrafficPattern(double dt); // TODO - need to add something to define what option we are flying - Touch and go / Stop and go / Landing properly / others? void TransmitPatternPositionReport(); void CalculateStartofDescent(); void ExitRunway(Point3D orthopos); void StartTaxi(); void Taxi(double dt); void GetNextTaxiNode(); void DoGroundElev(); }; #endif // _FG_AILocalTraffic_HXX