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1121 aurelien 1 
<?php
2 
class CartoGroupage {
3 
 
1138 aurelien 4 
	const MARQUEUR_GROUPE = 'GROUPE';
5 
	const MARQUEUR_COMMUNE = 'COMMUNE';
6 
	const MARQUEUR_STATION = 'STATION';
7 
 
1121 aurelien 8 
	private static $seuilClusterisation = 200;
9 
	private static $zoomDefaut = 3;
10 
	private static $zoomMaxClustering = 12;
11 
	private static $pasZoomDefaut = 1;
12 
	private static $pasZoomMaxClustering = 0.05;
13 
	private static $profondeurMin = 0;
14 
	private static $profondeurMax = 8;
15 
 
16 
	private static $pasCorrectionCentre = null;
17 
	private static $coefficientReductionPas = null;
18 
	private static $coefficientProfondeurMax = null;
19 
 
20 
	private static $nbElements = array('stations' => 0,'communes' => 0, 'observations' => 0);
1138 aurelien 21 
	private static $listeNoeudsSelectionnes = array();
1121 aurelien 22 
	private static $bornesMax = array('latMin' => null, 'lngMin' => null, 'latMax' => null, 'lngMax' => null);
1138 aurelien 23 
	private static $id_traites = array();
1121 aurelien 24 
	/*
25 
	  +---------+---------+
26 
	  |         |         |
27 
	  |    A    |    B    |
28 
	  |         |         |
29 
	  +---------*---------+
30 
	  |         |         |
31 
	  |    D    |    C    |
32 
	  |         |         |
33 
	  +---------+---------+
34 
 
35 
	  Quatres cadrans sont considérés par le quad tree
36 
	  * = centre de la fenetre
37 
	 */
38 
	public static function creerGroupesQuadtree(&$markers, $neLat, $neLng, $swLat, $swLng, $zoom = 3) {
39 
		if(count($markers) > self::$seuilClusterisation) {
40 
 
41 
			self::calculerProfondeurMax($zoom);
42 
			self::calculerPasCorrectionCentre($zoom);
43 
 
44 
			$noeudRacine = array('nbrePoints' => count($markers), 'points' => $markers);
45 
			self::attribuerAuCadran($noeudRacine, $neLat, $neLng, $swLat, $swLng);
46 
 
47 
		} else {
1138 aurelien 48 
			foreach($markers as &$marker) {
49 
				if(!self::estUnPointAExclure($marker)) {
50 
					$emplacement = self::formaterPointPourAjout(&$marker);
51 
					self::mettreAJourBornes(&$marker);
52 
					$points = array($marker);
53 
					$noeudSimple = array('points' => $points, 'nbrePoints' => 1);
54 
					self::$nbElements[$emplacement]++;
55 
					self::$listeNoeudsSelectionnes[] = self::ajouterGroupeOuPoint($noeudSimple);
56 
				}
1121 aurelien 57 
				self::$nbElements['observations']++;
58 
			}
59 
		}
60 
		return self::$listeNoeudsSelectionnes;
61 
	}
62 
 
63 
	private function calculerCoefficientReductionPas() {
64 
		if(self::$coefficientReductionPas == null) {
65 
			self::$coefficientReductionPas = (self::$pasZoomMaxClustering - self::$pasZoomDefaut)/(self::$zoomMaxClustering - self::$zoomDefaut);
66 
		}
67 
 
68 
		return self::$coefficientReductionPas;
69 
	}
70 
 
71 
	private function calculerPasCorrectionCentre($zoom) {
72 
		self::$pasCorrectionCentre = ($zoom - self::$zoomDefaut) * self::calculerCoefficientReductionPas() + self::$pasZoomDefaut;
73 
	}
74 
 
75 
	private function calculerCoefficientProfondeurMax() {
76 
		if(self::$coefficientProfondeurMax == null) {
77 
			self::$coefficientProfondeurMax = (self::$profondeurMax - self::$profondeurMin)/(self::$zoomMaxClustering - self::$zoomDefaut);
78 
		}
79 
 
80 
		return self::$coefficientProfondeurMax;
81 
	}
82 
 
83 
	private function calculerProfondeurMax($zoom) {
84 
		if($zoom > self::$zoomDefaut) {
85 
			self::$profondeurMax = round(($zoom - self::$zoomDefaut) * self::calculerCoefficientProfondeurMax() + self::$profondeurMin,0);
86 
		} else {
87 
			self::$profondeurMax = 1;
88 
		}
89 
	}
90 
 
91 
	public static function getNbElements() {
92 
		return self::$nbElements;
93 
	}
94 
 
95 
	public static function mettreAJourBornes(&$point) {
1139 aurelien 96 
 
97 
		if(!is_numeric($point['lat']) || abs($point['lat']) > 90) return;
98 
		if(!is_numeric($point['lng']) || abs($point['lng']) > 180) return;
99 
 
100 
		self::$bornesMax['latMin'] = ($point['lat'] < self::$bornesMax['latMin'] || self::$bornesMax['latMin'] == null) ? $point['lat'] : self::$bornesMax['latMin'] ;
101 
		self::$bornesMax['lngMin'] = ($point['lng'] < self::$bornesMax['lngMin'] || self::$bornesMax['lngMin'] == null) ? $point['lng'] : self::$bornesMax['lngMin'] ;
102 
		self::$bornesMax['latMax'] = ($point['lat'] > self::$bornesMax['latMax'] || self::$bornesMax['latMax'] == null) ? $point['lat'] : self::$bornesMax['latMax'] ;
103 
		self::$bornesMax['lngMax'] = ($point['lng'] > self::$bornesMax['lngMax'] || self::$bornesMax['lngMax'] == null) ? $point['lng'] : self::$bornesMax['lngMax'] ;
1121 aurelien 104 
	}
105 
 
106 
	public static function getBornes() {
107 
		return self::$bornesMax;
108 
	}
109 
 
110 
	/**
111 
	 *
112 
	 * @param mixed $noeud Le noeud à traiter par le quadtree
113 
	 * @param float $neLat Latitude du coin nord est de la fenetre
114 
	 * @param float $neLng Longitude du coin nord est de la fenetre
115 
	 * @param float $swLat Latitude du coin sud ouest de la fenetre
116 
	 * @param float $swLng Longitude du coin sud ouest de la fenetre
117 
	 * @param int $profondeur profondeur courante de l'arbre
118 
	 */
119 
	private static function attribuerAuCadran(&$noeud, $neLat, $neLng, $swLat, $swLng, $profondeur = 0) {
120 
 
121 
		$latCentre = round((($neLat+$swLat)/2)/self::$pasCorrectionCentre,0)*self::$pasCorrectionCentre;
122 
		$lngCentre = round((($neLng+$swLng)/2)/self::$pasCorrectionCentre,0)*self::$pasCorrectionCentre;
123 
 
1138 aurelien 124 
		foreach ($noeud['points'] as &$point) {
125 
			if(!self::estUnPointAExclure($point)) {
126 
				$emplacement = self::formaterPointPourAjout(&$point);
1121 aurelien 127 
				self::mettreAJourBornes(&$point);
128 
				$cadran = self::obtenirCadranPourPoint($latCentre, $lngCentre, $point);
129 
				self::ajouterFils($noeud,$cadran,$point);
1138 aurelien 130 
				self::$nbElements[$emplacement]++;
131 
			}
132 
			self::$nbElements['observations']++;
1121 aurelien 133 
		}
134 
 
135 
		$profondeur++;
136 
 
137 
		if($profondeur <= self::$profondeurMax) {
138 
			(isset($noeud['A']) && $noeud['A'] != null) ? self::attribuerAuCadran($noeud['A'], $neLat, $lngCentre , $latCentre, $swLng, $profondeur) : '';
139 
			(isset($noeud['B']) && $noeud['B'] != null) ? self::attribuerAuCadran($noeud['B'], $neLat, $neLng, $latCentre, $lngCentre, $profondeur) : '';
140 
			(isset($noeud['C']) && $noeud['C'] != null) ? self::attribuerAuCadran($noeud['C'], $latCentre, $neLng, $swLat, $lngCentre, $profondeur) : '';
141 
			(isset($noeud['D']) && $noeud['D'] != null) ? self::attribuerAuCadran($noeud['D'], $latCentre, $lngCentre, $swLat, $swLng, $profondeur) : '';
142 
		}
143 
 
144 
		if(self::estUnParentFeuilles($noeud)) {
145 
			self::$listeNoeudsSelectionnes[] = self::ajouterGroupeOuPoint($noeud);
146 
		}
147 
	}
148 
 
1138 aurelien 149 
	private static function estUnPointAExclure(&$point) {
150 
		return self::estSensible($point) &&
151 
		self::coordonneesCommuneSontNulles($point);
152 
	}
153 
 
154 
	private static function coordonneesCommuneSontNulles(&$point) {
155 
		$coord_nulles = ($point['wgs84_latitude'] == null ||
156 
		$point['wgs84_latitude'] == '' ||
157 
		$point['wgs84_longitude'] == null ||
158 
		$point['wgs84_longitude'] == '');
159 
		return $coord_nulles;
160 
	}
161 
 
162 
	private static function coordonneesSontNulles(&$point) {
163 
 
164 
		$coord_nulles = ($point['coord_x'] == '000null' ||
165 
				$point['coord_x'] == '' ||
166 
				$point['coord_y'] == '000null' ||
167 
				$point['coord_y'] == '');
168 
		return $coord_nulles;
169 
	}
170 
 
171 
	private static function estSensible(&$point) {
172 
		$sensible = isset($point['mots_cles_texte']) && substr_count($point['mots_cles_texte'], 'sensible') != 0;
173 
		return $sensible;
174 
	}
175 
 
176 
	private static function formaterNomStation(&$point) {
177 
		$station = '';
178 
		if($point['station'] != '' && $point['station'] != '000null') {
179 
			$station = $point['station'];
180 
		} else {
181 
			$station = $point['location'].(($point['id_location'] != '' && $point['id_location'] != '000null') ? '('.$point['id_location'].')' : '');
1121 aurelien 182 
		}
1138 aurelien 183 
 
184 
		return $station;
1121 aurelien 185 
	}
186 
 
1138 aurelien 187 
	private static function formaterPointPourAjout(&$point) {
188 
 
189 
		if(isset($point['type_emplacement'])) {
190 
			return $point['type_emplacement'];
191 
		}
192 
 
193 
		if(self::coordonneesSontNulles($point) || self::estSensible($point)) {
194 
				$point['id'] = self::MARQUEUR_COMMUNE.':'.$point['wgs84_latitude'].'|'.$point['wgs84_longitude'];
195 
				$point['type_emplacement'] = 'communes';
196 
				$point['lat'] = (float)$point['wgs84_latitude'];
197 
				$point['lng'] = (float)$point['wgs84_longitude'];
198 
		} else {
199 
			$point_allege = array();
200 
			$point_allege['id'] = self::MARQUEUR_STATION.':'.$point['coord_x'].'|'.$point['coord_y'];
201 
			$point_allege['type_emplacement'] = 'stations';
202 
			$point_allege['nom'] = self::formaterNomStation($point);
203 
			$point_allege['lat'] = (float)$point['coord_x'];
204 
			$point_allege['lng'] = (float)$point['coord_y'];
205 
 
206 
			$point = $point_allege;
207 
		}
208 
 
209 
		return $point['type_emplacement'];
210 
	}
211 
 
1121 aurelien 212 
	private function obtenirCadranPourPoint($latCentre,$lngCentre, &$point) {
213 
		if ($point['lng'] < $lngCentre) {
214 
			if ($point['lat'] > $latCentre) {
215 
					$cadran = 'A';
216 
				} else {
217 
					$cadran = 'D';
218 
				}
219 
		} else {
220 
			if ($point['lat'] > $latCentre) {
221 
				$cadran = 'B';
222 
			} else {
223 
				$cadran = 'C';
224 
			}
225 
		}
226 
		return $cadran;
227 
	}
228 
 
229 
	private static function ajouterFils(&$noeud, $cadran, &$point) {
230 
		if(!isset($noeud[$cadran])) {
231 
			$noeud[$cadran] = array('points' => array(),'nbrePoints' => 0, 'latMoyenne' => 0, 'lngMoyenne' => 0);
232 
		}
233 
		$noeud[$cadran]['points'][] = $point;
234 
		$noeud[$cadran]['nbrePoints']++;
235 
		$noeud[$cadran]['latMoyenne'] += $point['lat'];
236 
		$noeud[$cadran]['lngMoyenne'] += $point['lng'];
237 
	}
238 
 
239 
	private static function ajouterGroupeOuPoint(&$noeud) {
240 
		$groupe = array();
1138 aurelien 241 
		if ($noeud['nbrePoints'] > 1 && isset($noeud['latMoyenne']) && isset($noeud['lngMoyenne'])) {
1121 aurelien 242 
			$groupe['lat'] = $noeud['latMoyenne']/$noeud['nbrePoints'];
243 
			$groupe['lng'] = $noeud['lngMoyenne']/$noeud['nbrePoints'];
244 
			$groupe['id'] = 'GROUPE:'.$groupe['lat'].';'.$groupe['lng'];
245 
			$groupe['nbreMarqueur'] = $noeud['nbrePoints'];
246 
		} else {
247 
			$groupe = $noeud['points'][0];
248 
		}
249 
		return $groupe;
250 
	}
251 
 
252 
	private static function estUnParentFeuilles(&$noeud) {
253 
		return  self::estUneFeuille($noeud['A']) &&
254 
				self::estUneFeuille($noeud['B']) &&
255 
				self::estUneFeuille($noeud['C']) &&
256 
				self::estUneFeuille($noeud['D']);
257 
	}
258 
 
259 
	private static function estUneFeuille(&$noeud) {
260 
		return $noeud == null ||
261 
		(!isset($noeud['A']) || $noeud['A'] == null) &&
262 
		(!isset($noeud['B']) || $noeud['B'] == null) &&
263 
		(!isset($noeud['C']) || $noeud['C'] == null) &&
264 
		(!isset($noeud['D']) || $noeud['D'] == null);
265 
	}
266 
}
267 
?>