424 lines
16 KiB
JavaScript
424 lines
16 KiB
JavaScript
"use strict";
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function PlaneObject(icao) {
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// Info about the plane
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this.icao = icao;
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this.flight = null;
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this.squawk = null;
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this.selected = false;
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this.category = null;
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// Basic location information
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this.altitude = null;
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this.speed = null;
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this.track = null;
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this.position = null;
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this.sitedist = null;
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// Data packet numbers
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this.messages = null;
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this.rssi = null;
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// Track history as a series of line segments
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this.track_linesegs = [];
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this.history_size = 0;
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// When was this last updated (receiver timestamp)
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this.last_message_time = null;
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this.last_position_time = null;
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// When was this last updated (seconds before last update)
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this.seen = null;
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this.seen_pos = null;
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// Display info
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this.visible = true;
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this.marker = null;
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this.icon = { type: 'generic',
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fillOpacity: 0.9 };
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// request metadata
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this.registration = null;
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this.icaotype = null;
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getAircraftData(this.icao).done(function(data) {
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if ("r" in data) {
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this.registration = data.r;
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}
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if ("t" in data) {
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this.icaotype = data.t;
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}
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if (this.selected) {
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refreshSelected();
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}
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}.bind(this));
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}
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// Appends data to the running track so we can get a visual tail on the plane
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// Only useful for a long running browser session.
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PlaneObject.prototype.updateTrack = function(estimate_time) {
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var here = this.position;
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if (!here)
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return;
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if (this.track_linesegs.length == 0) {
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// Brand new track
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//console.log(this.icao + " new track");
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var newseg = { track : new google.maps.MVCArray([here,here]),
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line : null,
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head_update : this.last_position_time,
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tail_update : this.last_position_time,
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estimated : false,
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ground : (this.altitude === "ground")
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};
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this.track_linesegs.push(newseg);
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this.history_size += 2;
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return;
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}
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var lastseg = this.track_linesegs[this.track_linesegs.length - 1];
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var lastpos = lastseg.track.getAt(lastseg.track.getLength() - 1);
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var elapsed = (this.last_position_time - lastseg.head_update);
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var new_data = (here !== lastpos);
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var est_track = (elapsed > estimate_time);
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var ground_track = (this.altitude === "ground");
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if (!new_data)
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return false;
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if (est_track) {
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if (!lastseg.estimated) {
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// >5s gap in data, create a new estimated segment
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//console.log(this.icao + " switching to estimated");
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this.track_linesegs.push({ track : new google.maps.MVCArray([lastpos, here]),
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line : null,
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head_update : this.last_position_time,
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estimated : true });
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this.history_size += 2;
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return true;
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}
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// Append to ongoing estimated line
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//console.log(this.icao + " extending estimated (" + lastseg.track.getLength() + ")");
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lastseg.track.push(here);
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lastseg.head_update = this.last_position_time;
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this.history_size++;
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return true;
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}
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if (lastseg.estimated) {
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// We are back to good data.
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//console.log(this.icao + " switching to good track");
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this.track_linesegs.push({ track : new google.maps.MVCArray([lastpos, here]),
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line : null,
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head_update : this.last_position_time,
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tail_update : this.last_position_time,
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estimated : false,
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ground : (this.altitude === "ground") });
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this.history_size += 2;
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return true;
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}
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if ( (lastseg.ground && this.altitude !== "ground") ||
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(!lastseg.ground && this.altitude === "ground") ) {
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//console.log(this.icao + " ground state changed");
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// Create a new segment as the ground state changed.
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// assume the state changed halfway between the two points
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var midpoint = google.maps.geometry.spherical.interpolate(lastpos,here,0.5);
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lastseg.track.push(midpoint);
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this.track_linesegs.push({ track : new google.maps.MVCArray([midpoint,here,here]),
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line : null,
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head_update : this.last_position_time,
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tail_update : this.last_position_time,
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estimated : false,
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ground : (this.altitude === "ground") });
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this.history_size += 4;
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return true;
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}
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// Add more data to the existing track.
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// We only retain some historical points, at 5+ second intervals,
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// plus the most recent point
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if (this.last_position_time - lastseg.tail_update >= 5) {
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// enough time has elapsed; retain the last point and add a new one
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//console.log(this.icao + " retain last point");
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lastseg.track.push(here);
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lastseg.tail_update = lastseg.head_update;
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this.history_size ++;
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} else {
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// replace the last point with the current position
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lastseg.track.setAt(lastseg.track.getLength()-1, here);
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}
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lastseg.head_update = this.last_position_time;
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return true;
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};
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// This is to remove the line from the screen if we deselect the plane
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PlaneObject.prototype.clearLines = function() {
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for (var i = 0; i < this.track_linesegs.length; ++i) {
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var seg = this.track_linesegs[i];
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if (seg.line !== null) {
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seg.line.setMap(null);
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seg.line = null;
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}
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}
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};
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PlaneObject.prototype.getMarkerIconType = function() {
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var lookup = {
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'A1' : 'light',
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'A2' : 'medium',
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'A3' : 'medium',
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'A5' : 'heavy',
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'A7' : 'rotorcraft'
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};
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if (this.category === null || !(this.category in lookup))
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return 'generic'
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else
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return lookup[this.category];
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}
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PlaneObject.prototype.getMarkerColor = function() {
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// Emergency squawks override everything else
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if (this.squawk in SpecialSquawks)
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return SpecialSquawks[this.squawk].markerColor;
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var h, s, l;
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if (this.altitude === null) {
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h = ColorByAlt.unknown.h;
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s = ColorByAlt.unknown.s;
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l = ColorByAlt.unknown.l;
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} else if (this.altitude === "ground") {
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h = ColorByAlt.ground.h;
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s = ColorByAlt.ground.s;
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l = ColorByAlt.ground.l;
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} else {
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s = ColorByAlt.air.s;
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l = ColorByAlt.air.l;
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// find the pair of points the current altitude lies between,
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// and interpolate the hue between those points
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var hpoints = ColorByAlt.air.h;
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h = hpoints[0].val;
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for (var i = hpoints.length-1; i >= 0; --i) {
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if (this.altitude > hpoints[i].alt) {
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if (i == hpoints.length-1) {
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h = hpoints[i].val;
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} else {
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h = hpoints[i].val + (hpoints[i+1].val - hpoints[i].val) * (this.altitude - hpoints[i].alt) / (hpoints[i+1].alt - hpoints[i].alt)
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}
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break;
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}
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}
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}
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// If we have not seen a recent position update, change color
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if (this.seen_pos > 15) {
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h += ColorByAlt.stale.h;
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s += ColorByAlt.stale.s;
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l += ColorByAlt.stale.l;
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}
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// If this marker is selected, change color
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if (this.selected){
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h += ColorByAlt.selected.h;
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s += ColorByAlt.selected.s;
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l += ColorByAlt.selected.l;
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}
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if (h < 0) {
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h = (h % 360) + 360;
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} else if (h >= 360) {
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h = h % 360;
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}
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if (s < 5) s = 5;
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else if (s > 95) s = 95;
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if (l < 5) l = 5;
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else if (l > 95) l = 95;
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return 'hsl(' + h.toFixed(0) + ',' + s.toFixed(0) + '%,' + l.toFixed(0) + '%)'
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}
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PlaneObject.prototype.updateIcon = function() {
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var col = this.getMarkerColor();
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var type = this.getMarkerIconType();
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var weight = this.selected ? 2 : 1;
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var rotation = (this.track === null ? 0 : this.track);
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if (col === this.icon.fillColor && weight === this.icon.strokeWeight && rotation === this.icon.rotation && type == this.icon.type)
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return false; // no changes
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this.icon.fillColor = col;
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this.icon.strokeWeight = weight;
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this.icon.rotation = rotation;
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this.icon.type = type;
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this.icon.path = MarkerIcons[type].path;
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this.icon.anchor = MarkerIcons[type].anchor;
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this.icon.scale = MarkerIcons[type].scale;
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if (this.marker)
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this.marker.setIcon(this.icon);
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return true;
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};
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// Update our data
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PlaneObject.prototype.updateData = function(receiver_timestamp, data) {
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// Update all of our data
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this.messages = data.messages;
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this.rssi = data.rssi;
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this.last_message_time = receiver_timestamp - data.seen;
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if (typeof data.altitude !== "undefined")
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this.altitude = data.altitude;
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if (typeof data.vert_rate !== "undefined")
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this.vert_rate = data.vert_rate;
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if (typeof data.speed !== "undefined")
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this.speed = data.speed;
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if (typeof data.track !== "undefined")
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this.track = data.track;
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if (typeof data.lat !== "undefined") {
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this.position = new google.maps.LatLng(data.lat, data.lon);
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this.last_position_time = receiver_timestamp - data.seen_pos;
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if (SitePosition !== null) {
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this.sitedist = google.maps.geometry.spherical.computeDistanceBetween (SitePosition, this.position);
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}
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}
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if (typeof data.flight !== "undefined")
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this.flight = data.flight;
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if (typeof data.squawk !== "undefined")
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this.squawk = data.squawk;
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if (typeof data.category !== "undefined")
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this.category = data.category;
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this.position_from_mlat = false
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if (typeof data.mlat !== "undefined") {
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for (var i = 0; i < data.mlat.length; ++i) {
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if (data.mlat[i] === "lat" || data.mlat[i] == "lon") {
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this.position_from_mlat = true;
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break;
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}
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}
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}
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};
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PlaneObject.prototype.updateTick = function(receiver_timestamp, last_timestamp) {
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// recompute seen and seen_pos
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this.seen = receiver_timestamp - this.last_message_time;
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this.seen_pos = (this.last_position_time === null ? null : receiver_timestamp - this.last_position_time);
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// If no packet in over 58 seconds, clear the plane.
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if (this.seen > 58) {
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if (this.visible) {
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//console.log("hiding " + this.icao);
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this.clearMarker();
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this.visible = false;
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if (SelectedPlane == this.icao)
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selectPlaneByHex(null,false);
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}
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} else {
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this.visible = true;
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if (this.position !== null) {
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if (this.updateTrack(receiver_timestamp - last_timestamp + 5)) {
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this.updateLines();
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this.updateMarker(true);
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} else {
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this.updateMarker(false); // didn't move
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}
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}
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}
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};
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PlaneObject.prototype.clearMarker = function() {
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if (this.marker) {
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this.marker.setMap(null);
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google.maps.event.clearListeners(this.marker, 'click');
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this.marker = null;
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}
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};
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// Update our marker on the map
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PlaneObject.prototype.updateMarker = function(moved) {
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if (!this.visible) {
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this.clearMarker();
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return;
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}
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if (this.marker) {
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if (moved)
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this.marker.setPosition(this.position);
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this.updateIcon();
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} else {
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this.updateIcon();
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this.marker = new google.maps.Marker({
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position: this.position,
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map: GoogleMap,
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icon: this.icon,
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visible: true
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});
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// Trap clicks for this marker.
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google.maps.event.addListener(this.marker, 'click', selectPlaneByHex.bind(undefined,this.icao,false));
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google.maps.event.addListener(this.marker, 'dblclick', selectPlaneByHex.bind(undefined,this.icao,true));
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}
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// Setting the marker title
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var title = (this.flight === null || this.flight.length == 0) ? this.icao : (this.flight+' ('+this.icao+')');
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if (title !== this.marker.title)
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this.marker.setTitle(title);
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};
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// Update our planes tail line,
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PlaneObject.prototype.updateLines = function() {
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if (!this.selected)
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return;
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for (var i = 0; i < this.track_linesegs.length; ++i) {
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var seg = this.track_linesegs[i];
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if (seg.line === null) {
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// console.log("create line for seg " + i + " with " + seg.track.getLength() + " points" + (seg.estimated ? " (estimated)" : ""));
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// for (var j = 0; j < seg.track.getLength(); j++) {
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// console.log(" point " + j + " at " + seg.track.getAt(j).lat() + "," + seg.track.getAt(j).lng());
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// }
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if (seg.estimated) {
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var lineSymbol = {
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path: 'M 0,-1 0,1',
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strokeOpacity : 1,
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strokeColor : '#804040',
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strokeWeight : 2,
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scale: 2
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};
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seg.line = new google.maps.Polyline({
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path: seg.track,
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strokeOpacity: 0,
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icons: [{
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icon: lineSymbol,
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offset: '0',
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repeat: '10px' }],
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map : GoogleMap });
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} else {
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seg.line = new google.maps.Polyline({
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path: seg.track,
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strokeOpacity: 1.0,
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strokeColor: (seg.ground ? '#408040' : '#000000'),
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strokeWeight: 3,
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map: GoogleMap });
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}
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}
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}
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};
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PlaneObject.prototype.destroy = function() {
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this.clearLines();
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this.clearMarker();
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};
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