New file |
0,0 → 1,301 |
<?php |
class CartoGroupage { |
const OFFSET = 268435456;// Moitié de la circonférence de la terre au zoom 21 |
const RADIUS = 85445659.4471; /* $offset / pi() */ |
private static $profondeurMax = 3; |
private static $pasCorrectionCentre = 1; |
private static $zoom = 1; |
private static $seuilClusterisation = 180; |
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private static $debug = false; |
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private static $listeNoeudsSelectionnes = array(); |
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private static $hilbert_map_1 = array ('a' => array ( |
"0, 0" => array (0, 'd'), |
"0, 1" => array (1, 'a'), |
"1, 0" => array (3, 'b'), |
"1, 1" => array (2, 'a') |
), |
'b' => array ( |
"0, 0" => array (2, 'b'), |
"0, 1" => array (1, 'b'), |
"1, 0" => array (3, 'a'), |
"1, 1" => array (0, 'c') |
), |
'c' => array ( |
"0, 0" => array (2, 'c'), |
"0, 1" => array (3, 'd'), |
"1, 0" => array (1, 'c'), |
"1, 1" => array (0, 'b') |
), |
'd' => array ( |
"0, 0" => array (0, 'a'), |
"0, 1" => array (3, 'c'), |
"1, 0" => array (1, 'd'), |
"1, 1" => array (2, 'd') |
), |
); |
|
public static $cache = array('lat->y' => array(), 'lat->y' => array()); |
|
public static function creerGroupesManhattan($markers, $zoom) { |
$clustered = array(); |
// Distance minimum entre deux marqueurs pour l'inclure dans un cluster à un niveau de zoom donné |
$groupeRayon = (10000000 >> $zoom) / 100000; |
|
/* Boucle permettant de définir les marqueurs de références. */ |
while (count($markers)) { |
$marker = array_shift($markers); |
$cluster = array(); |
|
/* Comparaison de la distance des autres marqueurs avec le marqueur de référence. */ |
foreach ($markers as $key => $target) { |
$cibleDistance = abs($marker['lat'] - $target['lat']) + abs($marker['lng'] - $target['lng']); |
|
if ($groupeRayon > $cibleDistance) { |
unset($markers[$key]); |
$cluster['cibles'][] = $target; |
} |
} |
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$clustered[] = self::ajouterGroupe($cluster, $marker); |
} |
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return $clustered; |
} |
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public static function creerGroupesPixel($markers, $zoom, $clusterDistance = 20) { |
$clustered = array(); |
/* Loop until all markers have been compared. */ |
while (count($markers)) { |
$marker = array_shift($markers); |
$cluster = array(); |
|
/* Compare against all markers which are left. */ |
foreach ($markers as $key => $target) { |
$cibleDistance = self::pixelDistance($marker['lat'], $marker['lng'], $target['lat'], $target['lng'], $zoom); |
|
if ($clusterDistance > $cibleDistance) { |
//$m = "Distance entre %s,%s et %s,%s vaut %d pixels.\n"; |
//printf($m, $marker['lat'], $marker['lng'], $target['lat'], $target['lng'], $pixels); |
unset($markers[$key]); |
$cluster['cibles'][] = $target; |
$cluster['latMax'] = ($cluster['latMax'] < $target['lat']) ? $target['lat'] : $cluster['latMax']; |
$cluster['lngMax'] = ($cluster['lngMax'] < $target['lng']) ? $target['lng'] : $cluster['lngMax']; |
} |
} |
$clustered[] = self::ajouterGroupe($cluster, $marker); |
} |
return $clustered; |
} |
|
public static function ajouterGroupe($cluster, $marker) { |
$groupe = array(); |
$nbreMarqueurs = count($cluster['cibles']); |
if ($nbreMarqueurs > 0) { |
$groupe['id'] = 'GROUPE:'.$marker['lat'].';'.$marker['lng']; |
$groupe['lat'] = $marker['lat']; |
$groupe['lng'] = $marker['lng']; |
$groupe['latMax'] = $cluster['latMax']; |
$groupe['lngMax'] = $cluster['lngMax']; |
// +1 car le marqueur servant de point de départ n'est pas ajouté au cluster |
$groupe['nbreMarqueur'] = $nbreMarqueurs + 1; |
} else { |
$groupe = $marker; |
} |
return $groupe; |
} |
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public static function creerGroupesQuadtree2($markers, $neLat, $neLng, $swLat, $swLng, $zoom = 3) { |
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if(count($markers) > self::$seuilClusterisation) { |
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//$_GET['debug'] = true; |
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self::$zoom = $zoom; |
self::$pasCorrectionCentre = 10/self::$zoom; |
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self::$profondeurMax = round(pow($zoom,1.05),0) - 1; |
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echo ($_GET['debug'] == true) ? '<pre>' : ''; |
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echo ($_GET['debug'] == true) ? 'zoom :'.$zoom.' profondeur max '.self::$profondeurMax : ''; |
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//echo "$neLat, $neLng, $swLat, $swLng"; |
$noeud = array('coordCentre' => null,'nbrePoints' => count($markers), 'points' => $markers); |
self::attribuerAuCarre($noeud, $neLat, $neLng, $swLat, $swLng); |
echo ($_GET['debug'] == true) ? '</pre>' : ''; |
} else { |
foreach($markers as $marker) { |
$points = array($marker); |
$noeud_fictif = array('points' => $points, 'nbrePoints' => 1); |
self::$listeNoeudsSelectionnes[] = self::ajouterGroupe2($noeud_fictif); |
} |
} |
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return self::$listeNoeudsSelectionnes; |
} |
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private static function attribuerAuCarre(&$noeud, $neLat, $neLng, $swLat, $swLng, $profondeur = 0) { |
|
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echo ($_GET['debug'] == true) ? "coordonnees parametres : $neLat, $neLng, $swLat, $swLng" : ""; |
//$latCentre = $noeud['coordCentre']['lat'] = ($neLat+$swLat)/2; |
//$lngCentre = $noeud['coordCentre']['lng'] = ($neLng+$swLng)/2; |
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$latCentre = $noeud['coordCentre']['lat'] = round((($neLat+$swLat)/2)/self::$pasCorrectionCentre,0)*self::$pasCorrectionCentre; |
$lngCentre = $noeud['coordCentre']['lng'] = round((($neLng+$swLng)/2)/self::$pasCorrectionCentre,0)*self::$pasCorrectionCentre; |
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echo ($_GET['debug'] == true) ? "\n\n profondeur : $profondeur\n" : ""; |
echo ($_GET['debug'] == true) ? "\t centre : $lngCentre $latCentre \n" : ""; |
|
foreach ($noeud['points'] as &$point) { |
if ($point['lng'] < $lngCentre) { |
if ($point['lat'] > $latCentre) { |
//Carré A |
$noeud['A']['points'][] = $point; |
$noeud['A']['nbrePoints']++; |
$noeud['A']['latMoyenne'] += $point['lat']; |
$noeud['A']['lngMoyenne'] += $point['lng']; |
} else { |
//Carré D |
$noeud['D']['points'][] = $point; |
$noeud['D']['nbrePoints']++; |
$noeud['D']['latMoyenne'] += $point['lat']; |
$noeud['D']['lngMoyenne'] += $point['lng']; |
} |
} else { |
if ($point['lat'] > $latCentre) { |
//Carré B |
$noeud['B']['points'][] = $point; |
$noeud['B']['nbrePoints']++; |
$noeud['B']['latMoyenne'] += $point['lat']; |
$noeud['B']['lngMoyenne'] += $point['lng']; |
} else { |
//Carré C |
$noeud['C']['points'][] = $point; |
$noeud['C']['nbrePoints']++; |
$noeud['C']['latMoyenne'] += $point['lat']; |
$noeud['C']['lngMoyenne'] += $point['lng']; |
} |
} |
} |
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$profondeur++; |
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$centreNoeud = array('id' => $latCentre.' '.$lngCentre, 'lat' => $latCentre, 'lng' => $lngCentre, 'nbreMarqueur' => 0); |
//self::$listeNoeudsSelectionnes[] = $centreNoeud; |
if($profondeur <= self::$profondeurMax) { |
//echo "noeud A\n"; |
($noeud['A'] != null) ? self::attribuerAuCarre($noeud['A'], $neLat, $lngCentre , $latCentre, $lngSw, $profondeur) : ''; |
//echo "noeud B\n"; |
($noeud['B'] != null) ? self::attribuerAuCarre($noeud['B'], $neLat, $neLng, $latCentre, $lngCentre, $profondeur) : ''; |
//echo "noeud C\n"; |
($noeud['C'] != null) ? self::attribuerAuCarre($noeud['C'], $latCentre, $neLng, $swLat, $lngCentre, $profondeur) : ''; |
//echo "noeud D\n"; |
($noeud['D'] != null) ? self::attribuerAuCarre($noeud['D'], $latCentre, $lngCentre, $swLat, $swLng, $profondeur) : ''; |
} |
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//self::$listeNoeudsSelectionnes[] = self::ajouterGroupe2($noeud); |
if(self::estUneFeuille($noeud['A']) && self::estUneFeuille($noeud['B']) && self::estUneFeuille($noeud['C']) && self::estUneFeuille($noeud['D'])) { |
self::$listeNoeudsSelectionnes[] = self::ajouterGroupe2($noeud); |
} else { |
//self::$listeNoeudsSelectionnes[] = self::ajouterGroupe2($noeud); |
} |
} |
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public static function ajouterGroupe2($noeud) { |
$groupe = array(); |
if ($noeud['nbrePoints'] > 1) { |
$groupe['id'] = 'GROUPE:'.$noeud['coordCentre']['lat'].';'.$noeud['coordCentre']['lng']; |
// TODO changer la génération de l'id |
$groupe['lat'] = $noeud['latMoyenne']/$noeud['nbrePoints']; |
$groupe['lng'] = $noeud['lngMoyenne']/$noeud['nbrePoints']; |
echo ($_GET['debug'] == true) ? "\ncentre moyenne ".$groupe['lat']." ".$groupe['lng'] : ""; |
$groupe['nbreMarqueur'] = $noeud['nbrePoints']; |
//$groupe['latMax'] = $cluster['latMax']; |
//$groupe['lngMax'] = $cluster['lngMax']; |
} else { |
//echo '<pre>'.print_r($noeud['points'][0],true).'</pre>'; |
$groupe = $noeud['points'][0]; |
} |
return $groupe; |
} |
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private static function estUneFeuille($noeud) { |
return $noeud == null || ($noeud['A'] == null && $noeud['B'] == null && $noeud['C'] == null && $noeud['D'] == null); |
} |
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public static function creerGroupesQuadtree($markers, $zoom) { |
$ordre = $zoom - 3; |
$clustered = array(); |
foreach ($markers as $key => $marker) { |
$x = self::lonToX($marker['lng']); |
$y = self::latToY($marker['lat']); |
$payload = self::pointToQuadtree($x, $y, $ordre); |
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if (isset($clustered[$payload])) { |
$clustered[$payload]['nbreMarqueur']++; |
} else { |
$cluster = array(); |
$cluster['id'] = 'GROUPE'; |
$cluster['lat'] = $marker['lat']; |
$cluster['lng'] = $marker['lng']; |
$cluster['nbreMarqueur'] = 1; |
$clustered[$payload] = $cluster; |
} |
} |
return array_values($clustered); |
} |
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private static function pixelDistance($lat1, $lon1, $lat2, $lon2, $zoom) { |
$x1 = self::lonToX($lon1); |
$y1 = self::latToY($lat1); |
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$x2 = self::lonToX($lon2); |
$y2 = self::latToY($lat2); |
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return sqrt(pow(($x1 - $x2), 2) + pow(($y1 - $y2), 2)) >> (21 - $zoom); |
} |
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private static function lonToX($lon) { |
if (! isset(self::$cache['lng->x'][$lon])) { |
self::$cache['lng->x'][$lon] = round(self::OFFSET + self::RADIUS * $lon * pi() / 180); |
} |
return self::$cache['lng->x'][$lon]; |
} |
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private static function latToY($lat) { |
if (! isset(self::$cache['lat->y'][$lat])) { |
$logLat = log((1 + sin($lat * pi() / 180)) / (1 - sin($lat * pi() / 180))); |
self::$cache['lat->y'][$lat] = round(self::OFFSET - self::RADIUS * $logLat / 2); |
} |
return self::$cache['lat->y'][$lat]; |
} |
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public static function haversineDistance($lat1, $lon1, $lat2, $lon2) { |
$latd = deg2rad($lat2 - $lat1); |
$lond = deg2rad($lon2 - $lon1); |
$a = sin($latd / 2) * sin($latd / 2) + |
cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * |
sin($lond / 2) * sin($lond / 2); |
$c = 2 * atan2(sqrt($a), sqrt(1 - $a)); |
return 6371.0 * $c; |
} |
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private static function pointToQuadtree($x, $y, $order=16) { |
$current_square = 'a' ; |
$payload = 0; |
foreach (range($order-1, 0, -1) as $i) { |
$quad_x = $x & (1 << $i) ? 1 : 0; |
$quad_y = $y & (1 << $i) ? 1 : 0; |
list($quad_position, $current_square) = self::$hilbert_map_1[$current_square]["$quad_x, $quad_y"]; |
$payload .= $quad_position; |
} |
return $payload; |
} |
|
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} |
?> |