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<?phpclass Maillage {private $bbox;private $zoom;private $indexLongitude;private $indexLatitude;private $mailles;private $bdd = null;public function __construct($bbox, $zoom) {$this->bbox = $bbox;$this->zoom = $zoom;$this->indexLongitude = array();$this->indexLatitude = array();$this->mailles = array();}public function __destruct() {while (count($this->indexLatitude) > 0) {array_pop($this->indexLatitude);}while (count($this->indexLongitude) > 0) {array_pop($this->indexLongitude);}while (count($this->mailles) > 0) {array_pop($this->mailles);}unset($this);}public function genererMaillesVides() {$this->recupererIndexMaillesDansBbox();foreach ($this->indexLatitude as $indexLat => $intervalleLat) {$ligne = array();foreach ($this->indexLongitude as $indexLng => $intervalleLng) {$ligne[] = new Maille($intervalleLat[0], $intervalleLng[0], $intervalleLat[1],$intervalleLng[1], $indexLat, $indexLng);}$this->mailles[] = $ligne;}}private function recupererIndexMaillesDansBbox() {// recuperer toutes les mailles qui couvrent l'espace a requeter$conditionsLongitude = "";if ($this->bbox['ouest'] > $this->bbox['est']) {$conditionsLongitude = "NOT(debut>=".$this->bbox['ouest']." AND fin<=".$this->bbox['est'].")";} else {$conditionsLongitude = "fin>=".$this->bbox['ouest']." AND debut <=".$this->bbox['est'];}$requete ="SELECT axe, position, debut, fin FROM mailles_index WHERE zoom=".$this->zoom." "."AND ("."(axe='lat' AND fin>=".$this->bbox['sud']." AND debut<=".$this->bbox['nord'].") "."OR (axe='lng' AND {$conditionsLongitude})".") ORDER BY axe, position";$indexMailles = $this->getBdd()->recupererTous($requete);foreach ($indexMailles as $index) {if ($index['axe'] == 'lng') {$this->indexLongitude[$index['position']] = array($index['debut'], $index['fin']);} else {$this->indexLatitude[$index['position']] = array($index['debut'], $index['fin']);}}}private function getBdd() {if (is_null($this->bdd)) {$this->bdd = new Bdd();}$nomBdd = Config::get('bdd_eflore');if (is_null($nomBdd)) {$nomBdd = Config::get('bdd_nom');}$this->bdd->requeter("USE ".$nomBdd);return $this->bdd;}public function ajouterPoints(& $points) {foreach ($points as $index => $point) {list($longitude, $latitude) = $this->obtenirCoordonneesPoint($point);list($indexLongitude, $indexLatitude) = $this->rechercherIndexMaille($longitude, $latitude);$this->mailles[$indexLatitude][$indexLongitude]->ajouterPoint($point);}}private function obtenirCoordonneesPoint($point) {$longitude = 0;$latitude = 0;if (!isset($point['type_site']) || $point['type_site'] == 'STATION') {$longitude = $point['longitude'];$latitude = $point['latitude'];} else {$longitude = $point['lng_commune'];$latitude = $point['lat_commune'];}return array($longitude, $latitude);}private function rechercherIndexMaille($longitude, $latitude) {$indexLatitude = 0;$indexLongitude = 0;while ($indexLatitude < count($this->indexLatitude) - 1&& $this->mailles[$indexLatitude][0]->getLatitudeNord() < $latitude) {$indexLatitude ++;}while ($indexLongitude < count($this->indexLongitude) - 1&& $this->mailles[$indexLatitude][$indexLongitude]->getLongitudeEst() < $longitude) {$indexLongitude ++;}return array($indexLongitude, $indexLatitude);}public function formaterSortie() {$mailles_resume = array();foreach ($this->mailles as $ligne) {foreach ($ligne as $maille) {$nombrePoints = $maille->getNombrePoints();if ($nombrePoints == 0)continue;$mailles_resume[] = array('zoom' => $this->zoom,'sud' => $maille->getLatitudeSud(),'ouest' => $maille->getLongitudeOuest(),'nord' => $maille->getLatitudeNord(),'est' => $maille->getLongitudeEst(),'points' => $nombrePoints,'type_site' => 'MAILLE');}}if (count($mailles_resume) == 0 || count($mailles_resume[0]) == 0)return array();return $mailles_resume;}public function formaterPourInsertionBdd() {$mailles_resume = array();foreach ($this->mailles as $ligne) {foreach ($ligne as $maille) {if ($maille->getNombrePoints() > 0) {$mailles_resume[] = array('zoom' => $this->zoom,'sud' => $maille->getLatitudeSud(),'ouest' => $maille->getLongitudeOuest(),'nord' => $maille->getLatitudeNord(),'est' => $maille->getLongitudeEst(),'indexLat' => $maille->getIndexLatitude(),'indexLng' => $maille->getIndexLongitude(),'points' => $maille->getNombrePoints());}}}if (count($mailles_resume[0]) == 0)return array();return $mailles_resume;}public function zoomer() {$this->zoom += 1;}// redecoupage des mailles en 4 (fonction quadtree)// TODO : revoir le fonctionnement de cette methode (pour utilisation par les scripts uniquement)public function redecouperMailles() {$bdd = new Bdd();while (count($this->indexLatitude) > 0) {array_pop($this->indexLatitude);}while (count($this->indexLongitude) > 0) {array_pop($this->indexLongitude);}$mailles = $this->resumePourInsertionBdd();while (count($this->mailles) > 0) {array_pop($this->mailles);}foreach ($mailles as $maille) {$indexLat = 2 * $maille['indexLat'];$indexLng = 2 * $maille['indexLng'];// rechercher les nouvelles coordonnees des mailles au niveau de zoom inferieur$requete = "SELECT axe,position,debut,fin FROM mailles_index WHERE zoom=". $this->zoom ." AND ((axe='lat'". " AND (position={$indexLat} OR position=" . ($indexLat+1) . ")) OR (axe='lng' AND". " (position={$indexLng} OR position=" . ($indexLng+1) . "))) ORDER BY If(axe='lat',0,1)";$resultats = $bdd->recupererTous($requete);$this->indexLatitude[$indexLat] = array($resultats[0]['debut'], $resultats[0]['fin']);$this->indexLatitude[$indexLat+1] = array($resultats[1]['debut'], $resultats[1]['fin']);$this->indexLongitude[$indexLng] = array($resultats[2]['debut'], $resultats[2]['fin']);$this->indexLongitude[$indexLng+1] = array($resultats[3]['debut'], $resultats[3]['fin']);}ksort($this->indexLatitude);ksort($this->indexLongitude);// creer et ajouter les nouvelles mailles a partir des nouveaux indexforeach ($this->indexLatitude as $indexLat => $intervalleLat) {$ligne = array();foreach ($this->indexLongitude as $indexLng => $intervalleLng) {$ligne[] = new Maille($intervalleLat[0], $intervalleLng[0], $intervalleLat[1],$intervalleLng[1], $indexLat, $indexLng);}$this->mailles[] = $ligne;}}public function getNombreMailles() {return count($this->mailles);}}?>