function buildQuadTree($filename)
{
// Set the centrepoint of our QuadTree at 0.0 Longitude, 0.0 Latitude
$centrePoint = new \QuadTrees\QuadTreeXYPoint(0.0, 0.0);
// Set the bounding box to the entire globe
$quadTreeBoundingBox = new \QuadTrees\QuadTreeBoundingBox($centrePoint, 360, 180);
// Create our QuadTree
$quadTree = new \QuadTrees\QuadTree($quadTreeBoundingBox);
echo "Loading cities: ";
$cityFile = new \SplFileObject($filename);
$cityFile->setFlags(\SplFileObject::READ_CSV | \SplFileObject::DROP_NEW_LINE | \SplFileObject::SKIP_EMPTY);
// Populate our new QuadTree with cities from around the world
$cityCount = 0;
foreach ($cityFile as $cityData) {
if (!empty($cityData[0])) {
if ($cityCount % 1000 == 0) {
echo '.';
}
$city = new cityPoint($cityData[0], $cityData[1], $cityData[3], $cityData[2]);
$quadTree->insert($city);
++$cityCount;
}
}
echo PHP_EOL, "Added {$cityCount} cities to QuadTree", PHP_EOL;
return $quadTree;
}
function buildQuadTree($filename)
{
// Set the centrepoint of our QuadTree at 0.0 Longitude, 0.0 Latitude
$centrePoint = new \QuadTrees\QuadTreeXYPoint(0.0, 0.0);
// Set the bounding box to the entire globe
$quadTreeBoundingBox = new \QuadTrees\QuadTreeBoundingBox($centrePoint, 360, 180);
// Create our QuadTree
$quadTree = new \QuadTrees\QuadTree($quadTreeBoundingBox);
echo "Loading lunarLandings: ";
$landingFile = new \SplFileObject($filename);
$landingFile->setFlags(\SplFileObject::READ_CSV | \SplFileObject::DROP_NEW_LINE | \SplFileObject::SKIP_EMPTY);
// Populate our new QuadTree with lunarLandings from around the world
$lunarLandingCount = 0;
foreach ($landingFile as $lunarLandingData) {
if (!empty($lunarLandingData[0])) {
if ($lunarLandingCount % 10 == 0) {
echo '.';
}
$lunarLanding = new lunarLandingPoint(trim($lunarLandingData[0]), trim($lunarLandingData[1]), trim($lunarLandingData[2]), trim($lunarLandingData[4]), trim($lunarLandingData[3]));
$quadTree->insert($lunarLanding);
++$lunarLandingCount;
}
}
echo PHP_EOL, "Added {$lunarLandingCount} lunar landing details to QuadTree", PHP_EOL;
return $quadTree;
}
