173 lines
3.4 KiB
JavaScript
173 lines
3.4 KiB
JavaScript
// -*- mode: javascript; indent-tabs-mode: t; c-basic-offset: 8 -*-
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"use strict";
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var NBSP='\u00a0';
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var DEGREES='\u00b0'
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var UP_TRIANGLE='\u25b2'; // U+25B2 BLACK UP-POINTING TRIANGLE
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var DOWN_TRIANGLE='\u25bc'; // U+25BC BLACK DOWN-POINTING TRIANGLE
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var TrackDirections = ["North","Northeast","East","Southeast","South","Southwest","West","Northwest"];
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// formatting helpers
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// track in degrees (0..359)
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function format_track_brief(track) {
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if (track === null){
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return "";
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}
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return Math.round(track);
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}
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// track in degrees (0..359)
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function format_track_long(track) {
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if (track === null){
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return "n/a";
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}
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var trackDir = Math.floor((360 + track % 360 + 22.5) / 45) % 8;
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return Math.round(track) + DEGREES + NBSP + "(" + TrackDirections[trackDir] + ")";
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}
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// altitude (input: alt in feet)
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// brief will always show either Metric or Imperial
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function format_altitude_brief(alt, vr) {
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var alt_text;
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if (alt === null){
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return "";
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} else if (alt === "ground"){
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return "ground";
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}
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if (Metric) {
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alt_text = Math.round(alt / 3.2828) + NBSP; // Altitude to meters
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} else {
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alt_text = Math.round(alt) + NBSP;
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}
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// Vertical Rate Triangle
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if (vr > 128){
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return alt_text + UP_TRIANGLE;
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} else if (vr < -128){
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return alt_text + DOWN_TRIANGLE;
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} else {
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return alt_text + NBSP;
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}
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}
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// alt in ft
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function _alt_to_unit(alt, m) {
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if (m)
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return Math.round(alt / 3.2828) + NBSP + "m";
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else
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return Math.round(alt) + NBSP + "ft";
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}
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function format_altitude_long(alt, vr) {
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var alt_text = "";
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if (alt === null) {
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return "n/a";
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} else if (alt === "ground") {
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return "on ground";
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}
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// Primary unit
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alt_text = _alt_to_unit(alt, Metric);
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// Secondary unit
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if (ShowOtherUnits) {
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alt_text = alt_text + ' | ' + _alt_to_unit(alt, !Metric);
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}
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if (vr > 128) {
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return UP_TRIANGLE + NBSP + alt_text;
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} else if (vr < -128) {
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return DOWN_TRIANGLE + NBSP + alt_text;
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} else {
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return alt_text;
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}
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}
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//input: speed in kts
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function format_speed_brief(speed) {
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if (speed === null) {
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return "";
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}
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if (Metric) {
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return Math.round(speed * 1.852); // knots to kilometers per hour
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} else {
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return Math.round(speed); // knots
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}
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}
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// speed in kts
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function _speed_to_unit(speed, m) {
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if (m)
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return Math.round(speed * 1.852) + NBSP + "km/h";
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else
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return Math.round(speed) + NBSP + "kt";
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}
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function format_speed_long(speed) {
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if (speed === null) {
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return "n/a";
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}
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// Primary unit
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var speed_text = _speed_to_unit(speed, Metric);
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// Secondary unit
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if (ShowOtherUnits) {
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speed_text = speed_text + ' | ' + _speed_to_unit(speed, !Metric);
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}
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return speed_text;
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}
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// dist in meters
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function format_distance_brief(dist) {
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if (dist === null) {
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return "";
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}
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if (Metric) {
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return (dist/1000).toFixed(1); // meters to kilometers
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} else {
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return (dist/1852).toFixed(1); // meters to nautocal miles
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}
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}
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// dist in metres
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function _dist_to_unit(dist, m) {
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if (m)
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return (dist/1000).toFixed(1) + NBSP + "km";
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else
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return (dist/1852).toFixed(1) + NBSP + "NM";
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}
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function format_distance_long(dist) {
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if (dist === null) {
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return "n/a";
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}
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// Primary unit
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var dist_text = _dist_to_unit(dist, Metric);
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// Secondary unit
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if (ShowOtherUnits) {
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dist_text = dist_text + ' | ' + _dist_to_unit(dist, !Metric);
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}
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return dist_text;
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}
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// p is a [lon, lat] coordinate
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function format_latlng(p) {
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return p[1].toFixed(3) + DEGREES + "," + NBSP + p[0].toFixed(3) + DEGREES;
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}
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