152 wiersze
4.6 KiB
PHP
152 wiersze
4.6 KiB
PHP
<?
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/*
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* Code to generate a KML flight path given the UUID
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* and serve it to the user as a download.
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*
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* CU Spaceflight Landing Prediction Software
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* http://www.cuspaceflight.co.uk
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*
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* http://github.com/jonsowman/cusf-standalone-predictor
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*
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* Jon Sowman 2010
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* jon@hexoc.com
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*
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*/
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// Include config and function files
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require_once("includes/config.inc.php");
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require_once("includes/functions.inc.php");
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// Check that we were given a UUID
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if ( !isset($_GET['uuid']) || $_GET['uuid'] == "0" ) die("No UUID supplied to KML generation script");
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// Now verify said UUID is a real SHA1 hash
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$uuid = $_GET['uuid'];
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if ( strlen($uuid) != 40 || !ctype_alnum($uuid) ) die("The supplied UUID was not a valid SHA1 hash");
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// Construct paths to required predictor files and check they exist
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$flight_csv = PREDS_PATH . $uuid . "/" . FLIGHT_CSV;
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$scenario_file = PREDS_PATH . $uuid . "/" . SCENARIO_FILE;
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if ( !file_exists( $flight_csv ) || !file_exists( $scenario_file ) ) die("No prediction data for UUID");
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// make the prediction model
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$scenario = parse_ini_file($scenario_file);
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$kml = array('<?xml version="1.0" encoding="UTF-8"?>');
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$kml[] = '<kml xmlns="http://www.opengis.net/kml/2.2">';
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$kml[] = '<Document>';
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$kml[] = '<name>Flight Path</name>';
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$kml[] = '<description><![CDATA[Flight data for flight ' . $uuid . ' <br>Site: ' . $scenario['latitude'] . ', '
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. $scenario['longitude'] . ' at ' . $scenario['hour'] . ':' . $scenario['minute']
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. ' on ' . $scenario['day'] . '/' . $scenario['month'] . '/' . $scenario['year']
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. ']]></description>';
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$kml[] = '<Style id="yellowPoly">';
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$kml[] = '<LineStyle>';
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$kml[] = '<color>7f00ffff</color>';
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$kml[] = '<width>4</width>';
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$kml[] = '</LineStyle>';
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$kml[] = '<PolyStyle>';
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$kml[] = '<color>7f00ff00</color>';
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$kml[] = '</PolyStyle>';
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$kml[] = '</Style>';
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$kml[] = '<Placemark>';
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$kml[] = '<name>Flight path</name>';
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$kml[] = '<description>Ascent rate: ' . $scenario['ascent-rate'] . 'm/s, descent rate: '
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. $scenario['descent-rate'] . 'm/s with burst at ' . $scenario['burst-altitude']
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. 'm.' . '</description>';
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$kml[] = '<styleUrl>#yellowPoly</styleUrl>';
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$kml[] = '<LineString>';
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$kml[] = '<extrude>1</extrude>';
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$kml[] = '<tesselate>1</tesselate>';
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$kml[] = '<altitudeMode>absolute</altitudeMode>';
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$kml[] = '<coordinates>';
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// now print the lat/long/alt from the CSV
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// GE is retarded and wants its KML in the format LON,LAT,ALT - wtf
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$launch_lat;
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$launch_lon;
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$launch_time;
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$burst_lat;
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$burst_lon;
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$burst_time;
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$land_lat;
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$land_lon;
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$land_time;
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$max_alt = -10;
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$fh = fopen($flight_csv, "r") or die("Could not open file");
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$i=0;
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while (($data = fgetcsv($fh)) !== FALSE) {
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$num = count($data);
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if ( $num < 4 ) die("Invalid XML");
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$time = $data[0];
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$lat = $data[1];
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$lon = $data[2];
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$alt = $data[3];
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if ( $i == 0 ) {
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$launch_lat = $lat;
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$launch_lon = $lon;
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$launch_time = $time;
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}
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// see if the current point is above the last
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if ( $alt > $max_alt ) {
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$max_alt = $alt;
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$burst_lat = $lat;
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$burst_lon = $lon;
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$burst_time = $time;
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}
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// update this on every interation
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$land_lat = $lat;
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$land_lon = $lon;
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$land_time = $time;
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// add the formatted line to the KML array
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$kml[] = $lon . "," . $lat . "," . $alt;
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$i++;
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}
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$kml[] = '</coordinates>';
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$kml[] = '</LineString></Placemark>';
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// Make the launch marker
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$kml[] = '<Placemark>';
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$kml[] = '<name>Balloon Launch</name>';
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$kml[] = '<description>Balloon launch at ' . $launch_lat . ', ' . $launch_lon . ' at '
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. date("H:i d/m/Y", $launch_time) . '.</description>';
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$kml[] = '<Point><coordinates>' . $launch_lon . ',' . $launch_lat . ',0' . '</coordinates></Point>';
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$kml[] = '</Placemark>';
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// Make the burst marker
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$kml[] = '<Placemark>';
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$kml[] = '<name>Balloon Burst</name>';
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$kml[] = '<description>Balloon burst at ' . $burst_lat . ', ' . $burst_lon . ' at '
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. date("H:i d/m/Y", $burst_time) . ' with altitude ' . $max_alt . 'm.</description>';
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$kml[] = '<Point><coordinates>' . $burst_lon . ',' . $burst_lat . ',' . $max_alt . '</coordinates></Point>';
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$kml[] = '</Placemark>';
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// Make the land marker
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$kml[] = '<Placemark>';
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$kml[] = '<name>Predicted Balloon Landing</name>';
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$kml[] = '<description>Balloon landing at ' . $land_lat . ', ' . $land_lon . ' at '
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. date("H:i d/m/Y", $land_time) . '.</description>';
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$kml[] = '<Point><coordinates>' . $land_lon . ',' . $land_lat . ',0' . '</coordinates></Point>';
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$kml[] = '</Placemark>';
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$kml[] = '</Document></kml>';
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$kmlOut = join("\n", $kml);
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header("Content-type: application/vnd.google-earth.kml+xml");
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header("Content-Disposition: attachment; filename=".$uuid.".kml");
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echo $kmlOut;
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?>
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