230 lines
8.6 KiB
C++
230 lines
8.6 KiB
C++
// FGAILocalTraffic - AIEntity derived class with enough logic to
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// fly and interact with the traffic pattern.
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//
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// Written by David Luff, started March 2002.
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//
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// Copyright (C) 2002 David C. Luff - david.luff@nottingham.ac.uk
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#ifndef _FG_AILocalTraffic_HXX
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#define _FG_AILocalTraffic_HXX
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#include <simgear/math/point3d.hxx>
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#include <Main/fg_props.hxx>
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#include "tower.hxx"
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#include "AIPlane.hxx"
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#include "ATCProjection.hxx"
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#include "ground.hxx"
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#include <string>
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SG_USING_STD(string);
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enum TaxiState {
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TD_INBOUND,
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TD_OUTBOUND,
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TD_NONE,
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TD_LINING_UP
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};
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enum OperatingState {
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IN_PATTERN,
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TAXIING,
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PARKED,
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EN_ROUTE
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};
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struct StartOfDescent {
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PatternLeg leg;
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double x; // Runway aligned orthopos
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double y; // ditto
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};
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class FGAILocalTraffic : public FGAIPlane {
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public:
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// At the moment we expect the expanded short form callsign - eventually we will just want the reg + type.
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FGAILocalTraffic();
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~FGAILocalTraffic();
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// Initialise
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bool Init(const string& callsign, const string& ICAO, OperatingState initialState = PARKED, PatternLeg initialLeg = DOWNWIND);
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// Run the internal calculations
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void Update(double dt);
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// Go out and practice circuits
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void FlyCircuits(int numCircuits, bool tag);
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// Return what type of landing we're doing on this circuit
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LandingType GetLandingOption();
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// TODO - this will get more complex and moved into the main class
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// body eventually since the position approved to taxi to will have
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// to be passed.
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inline void ApproveTaxiRequest() {taxiRequestCleared = true;}
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inline void DenyTaxiRequest() {taxiRequestCleared = false;}
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void RegisterTransmission(int code);
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// Process callbacks sent by base class
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// (These codes are not related to the codes above)
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void ProcessCallback(int code);
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// This is a hack and will probably go eventually
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inline bool AtHoldShort() {return holdingShort;}
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protected:
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// Attempt to enter the traffic pattern in a reasonably intelligent manner
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void EnterTrafficPattern(double dt);
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// Set up the internal state to be consistent for a downwind entry.
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void DownwindEntry();
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// Ditto for straight-in
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void StraightInEntry(bool des = false);
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// Do what is necessary to land and parkup at home airport
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void ReturnToBase(double dt);
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// Airport/runway/pattern details
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string airportID; // The ICAO code of the airport that we're operating around
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double aptElev; // Airport elevation
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FGGround* ground; // A pointer to the ground control.
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FGTower* tower; // A pointer to the tower control.
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bool _controlled; // Set true if we find tower control working for the airport, false otherwise.
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RunwayDetails rwy;
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double patternDirection; // 1 for right, -1 for left (This is double because we multiply/divide turn rates
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// with it to get RH/LH turns - DON'T convert it to int under ANY circumstances!!
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double glideAngle; // Assumed to be visual glidepath angle for FGAILocalTraffic - can be found at www.airnav.com
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// Its conceivable that patternDirection and glidePath could be moved into the RunwayDetails structure.
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// Its possible that this might be moved out to the ground/airport class at some point.
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FGATCAlignedProjection ortho; // Orthogonal mapping of the local area with the threshold at the origin
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// and the runway aligned with the y axis.
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void GetAirportDetails(const string& id);
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void GetRwyDetails(const string& id);
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double responseCounter; // timer in seconds to allow response to requests to be a little while after them
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// Will almost certainly get moved to FGAIPlane.
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private:
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FGATCMgr* ATC;
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// This is purely for synactic convienience to avoid writing globals->get_ATC_mgr()-> all through the code!
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// High-level stuff
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OperatingState operatingState;
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int circuitsToFly; //Number of circuits still to do in this session NOT INCLUDING THE CURRENT ONE
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bool touchAndGo; //True if circuits should be flown touch and go, false for full stop
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bool transmitted; // Set true when a position report for the current leg has been transmitted.
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// Performance characteristics of the plane in knots and ft/min - some of this might get moved out into FGAIPlane
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double Vr;
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double best_rate_of_climb_speed;
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double best_rate_of_climb;
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double nominal_climb_speed;
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double nominal_climb_rate;
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double nominal_circuit_speed;
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double min_circuit_speed;
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double max_circuit_speed;
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double nominal_descent_rate;
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double nominal_approach_speed;
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double nominal_final_speed;
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double stall_speed_landing_config;
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double nominal_taxi_speed;
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// Physical/rendering stuff
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double wheelOffset; // Height above ground at which we need to render the plane whilst taxiing
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bool elevInitGood; // We have had at least one good elev reading
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bool inAir; // True when off the ground
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// environment - some of this might get moved into FGAIPlane
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SGPropertyNode* wind_from_hdg; //degrees
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SGPropertyNode* wind_speed_knots; //knots
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// Pattern details that (may) change
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int numInPattern; // Number of planes in the pattern (this might get more complicated if high performance GA aircraft fly a higher pattern eventually)
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int numAhead; // More importantly - how many of them are ahead of us?
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double distToNext; // And even more importantly, how near are we getting to the one immediately ahead?
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//PatternLeg leg; // Our current position in the pattern - now moved to FGAIPlane
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StartOfDescent SoD; // Start of descent calculated wrt wind, pattern size & altitude, glideslope etc
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bool descending; // We're in the coming down phase of the pattern
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double targetDescentRate; // m/s
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// Taxiing details
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// At the moment this assumes that all taxiing in is to gates (a loose term that includes
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// any permitted parking spot) and that all taxiing out is to runways.
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bool parked;
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bool taxiing;
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bool taxiRequestPending;
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bool taxiRequestCleared;
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TaxiState taxiState;
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double desiredTaxiHeading;
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double taxiTurnRadius;
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double nominalTaxiSpeed;
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Gate* ourGate;
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ground_network_path_type path; // a path through the ground network for the plane to taxi
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unsigned int taxiPathPos; // position of iterator in taxi path when applicable
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node* nextTaxiNode; // next node in taxi path
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node* holdShortNode;
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//Runway out_dest; //FIXME - implement this
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bool holdingShort;
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bool reportReadyForDeparture; // set true when ATC has requested that the plane report when ready for departure
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bool clearedToLineUp;
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bool clearedToTakeOff;
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bool _clearedToLand; // also implies cleared for the option.
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bool liningUp; // Set true when the turn onto the runway heading is commenced when taxiing out
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bool goAround; // Set true if need to go-around
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bool goAroundCalled; // Set true during go-around only after we have called our go-around on the radio
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bool contactTower; // we have been told to contact tower
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bool contactGround; // we have been told to contact ground
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bool changeFreq; // true when we need to change frequency
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bool _taxiToGA; // Temporary mega-hack indicating we are to taxi to the GA parking and disconnect from tower control.
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bool _removeSelf; // Indicates that we wish to remove this instance. The use of a variable is a hack to allow time for messages to purge before removal, due to the fagility of the current dialog system.
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atc_type changeFreqType; // the service we need to change to
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bool freeTaxi; // False if the airport has a facilities file with a logical taxi network defined, true if we need to calculate our own taxiing points.
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// Hack for getting close to the runway when atan can go pear-shaped
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double _savedSlope;
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void FlyTrafficPattern(double dt);
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// TODO - need to add something to define what option we are flying - Touch and go / Stop and go / Landing properly / others?
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void TransmitPatternPositionReport();
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void CalculateSoD(double base_leg_pos, double downwind_leg_pos, bool pattern_direction);
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void ExitRunway(const Point3D& orthopos);
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void StartTaxi();
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void Taxi(double dt);
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void GetNextTaxiNode();
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void DoGroundElev();
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// Set when the plane should be invisible *regardless of distance from user*.
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bool _invisible;
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};
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#endif // _FG_AILocalTraffic_HXX
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