238 lines
8.2 KiB
C++
238 lines
8.2 KiB
C++
// approach.hxx -- Approach class
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//
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// Written by Alexander Kappes, started March 2002.
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//
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// Copyright (C) 2002 Alexander Kappes
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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#ifndef _FG_APPROACH_HXX
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#define _FG_APPROACH_HXX
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#include <stdio.h>
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#include <simgear/compiler.h>
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#include <simgear/math/sg_geodesy.hxx>
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#include <simgear/misc/sgstream.hxx>
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#include <simgear/magvar/magvar.hxx>
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#include <simgear/timing/sg_time.hxx>
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#include <simgear/bucket/newbucket.hxx>
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#include <Main/fg_props.hxx>
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#ifdef SG_HAVE_STD_INCLUDES
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# include <istream>
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#include <iomanip>
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#elif defined( SG_HAVE_NATIVE_SGI_COMPILERS )
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# include <iostream.h>
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#elif defined( __BORLANDC__ )
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# include <iostream>
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#else
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# include <istream.h>
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#include <iomanip.h>
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#endif
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#if ! defined( SG_HAVE_NATIVE_SGI_COMPILERS )
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SG_USING_STD(istream);
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#endif
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SG_USING_STD(string);
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#include "ATC.hxx"
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#include "transmission.hxx"
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//DCL - a complete guess for now.
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#define FG_APPROACH_DEFAULT_RANGE 100
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// Contains all the information about a plane that the approach control needs
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const int max_planes = 20; // max number of planes on the stack
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const int max_wp = 10; // max number of waypoints for approach phase
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const double max_ta = 130; // max turning angle for plane during approach
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const double tbm = 20000.0; // min time (in ms) between two messages
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const double lfl = 10.0; // length of final leg
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struct PlaneApp {
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// variables for plane if it's on the radar
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string ident; // indentification of plane
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double lon; // longitude in degrees
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double lat; // latitude in degrees
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double alt; // Altitute above sea level in feet
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double hdg; // heading of plane in degrees
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double dist; // distance to airport in miles
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double brg; // bearing relative to airport in degrees
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double spd; // speed above ground
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int contact; // contact with approach established?
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// 0 = no contact yet
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// 1 = in contact
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// 2 = handed off to tower
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double turn_rate; // standard turning rate of the plane in seconds per degree
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double desc_rate; // standard descent rate of the plane in feets per minute
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double clmb_rate; // standard climb rate of the plane in feets per minute
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// additional variables if contact has been established
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int wpn; // number of waypoints
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double wpts[max_wp][6]; // assigned waypoints for approach phase
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// first wp in list is airport
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// last waypoint point at which contact was established
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// second index: 0 = bearing to airport
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// second index: 1 = distance to airport
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// second index: 2 = alt
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// second index: 3 = ETA
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// second index: 4 = heading to next waypoint
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// second index: 5 = distance to next waypoint
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double dnwp; // distance to next waypoint
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double dcc; // closest distance to current assigned course
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double dnc; // closest distance to course from next to next to next wp
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double aalt; // assigned altitude
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double ahdg; // assigned heading
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bool on_crs; // is the plane on course?
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bool wp_change; // way point has changed
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double tlm; // time when last message was sent
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TransCode lmc; // code of last message
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};
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class FGApproach : public FGATC {
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int bucket;
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string active_runway;
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double active_rw_hdg;
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double active_rw_lon;
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double active_rw_lat;
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double active_rw_len;
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bool display; // Flag to indicate whether we should be outputting to the display.
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bool displaying; // Flag to indicate whether we are outputting to the display.
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int num_planes; // number of planes on the stack
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PlaneApp planes[max_planes]; // Array of planes
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string transmission;
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bool first;
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SGPropertyNode *comm1_node;
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SGPropertyNode *comm2_node;
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SGPropertyNode *atcmenu_node;
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SGPropertyNode *atcopt0_node;
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SGPropertyNode *atcopt1_node;
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SGPropertyNode *atcopt2_node;
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SGPropertyNode *atcopt3_node;
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SGPropertyNode *atcopt4_node;
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SGPropertyNode *atcopt5_node;
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SGPropertyNode *atcopt6_node;
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SGPropertyNode *atcopt7_node;
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SGPropertyNode *atcopt8_node;
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SGPropertyNode *atcopt9_node;
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// for failure modeling
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string trans_ident; // transmitted ident
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bool approach_failed; // approach failed?
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public:
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FGApproach(void);
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~FGApproach(void);
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void Init();
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void Update(double dt);
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// Add new plane to stack if not already registered
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// Input: pid - id of plane (name)
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// Output: "true" if added; "false" if already existend
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void AddPlane(string pid);
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// Remove plane from stack if out of range
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int RemovePlane();
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//Indicate that this instance should be outputting to the ATC display
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inline void SetDisplay(void) {display = true;}
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//Indicate that this instance should not be outputting to the ATC display
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inline void SetNoDisplay(void) {display = false;}
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inline double get_bucket() const { return bucket; }
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inline int get_pnum() const { return num_planes; }
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inline string get_trans_ident() { return trans_ident; }
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inline atc_type GetType() { return APPROACH; }
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private:
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void calc_wp( const int &i);
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void update_plane_dat();
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void get_active_runway();
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void update_param(const int &i);
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double round_alt( bool hl, double alt );
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double angle_diff_deg( const double &a1, const double &a2);
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// ========================================================================
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// get point2 given starting point1 and course and distance
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// input: point1 = heading in degrees, distance
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// input: course in degrees, distance
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// output: point2 = heading in degrees, distance
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// ========================================================================
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void calc_cd_head_dist(const double &h1, const double &d1,
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const double &course, const double &dist,
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double *h2, double *d2);
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// ========================================================================
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// get heading and distance between two points; point2 ---> point1
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// input: point1 = heading in degrees, distance
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// input: point2 = heading in degrees, distance
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// output: course in degrees, distance
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// ========================================================================
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void calc_hd_course_dist(const double &h1, const double &d1,
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const double &h2, const double &d2,
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double *course, double *dist);
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// ========================================================================
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// closest distance between a point and a straigt line in 2 dim.
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// the input variables are given in (heading, distance)
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// relative to a common point
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// input: point = heading in degrees, distance
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// input: straigt line = anker vector (heading in degrees, distance),
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// heading of direction vector
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// output: distance
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// ========================================================================
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double calc_psl_dist(const double &h1, const double &d1,
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const double &h2, const double &d2,
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const double &h3);
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// Pointers to current users position
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SGPropertyNode *lon_node;
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SGPropertyNode *lat_node;
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SGPropertyNode *elev_node;
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SGPropertyNode *hdg_node;
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SGPropertyNode *speed_node;
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SGPropertyNode *etime_node;
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//Update the transmission string
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void UpdateTransmission(void);
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friend istream& operator>> ( istream&, FGApproach& );
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};
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#endif // _FG_APPROACH_HXX
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