// Documentation : http://randochartreuse.free.fr/mobac2.x/documentation/#bsh
// Version : 24/04/2020

// Nom de la carte affiché dans MOBAC
	name = "Mars, randonner sur mars ...";

// Nom du serveur
	String MyServer = ".google.com"; 
	
// MyFolder au format "dossier" ou "dossier1/dossier2/etc"
	String MyFolder = "mw-planetary/mars";

/* you choose */
	MapType = "infrared";	// "infrared", "visible" ou "elevation"
	
// Paramètre spécifique à certains serveurs (Google, 4umaps, etc.). Parfois "jpeg" au lieu de "jpg"
	String TileExt ="jpg";

tileType = "jpg";	// Type d’image fourni par le serveur (png, jpg or gif)
tileSize = 256;		// Facultatif : Supprimer la ligne dans le doute
minZoom = 0;		// Facultatif : Zoom minimal souhaité (et/ou fourni par le serveur)
maxZoom = 12;		// Facultatif : Zoom maximal souhaité (et/ou fourni par le serveur) -> Maximum 22 pour Mobac

String getTileUrl(int Zoom, int X, int Y) 
{
		w = 1<<Zoom;
		// int w = (int) Math.pow(2, Zoom);
		z0 = Zoom;
		Num_Server = (X % 2) + 1;	// 0 1
		// urlX_de_test = "http://mw2.google.com/mw-planetary/mars/infrared/tsrrrsrtqrstr.jpg"
		return  "http://mw" + Num_Server + MyServer + "/" + MyFolder + "/" + MapType + "/t" + BuildTileName(Zoom, X, Y) + "." + TileExt;    
}

/*
 Tile script for mars maps (see http://www.uahirise.org/releases/hiwish.php for details)
 May not be very useful for most users but you can at least fetch a large texture from mars...
 reverse engineered with FireBug and TAC Map Evaluator 1.7 beta 8 by Henry T.

 You can choose between 3 different layers (infrared, visible, elevation)

 They use the google technology with some recursive quadtree naming convention for the tiles resulting in longer
 filenames the more you Zoom in. Therefore I use a recursive function.
 
 top left: "q"
 top right: "r" 
 bottom right: "s"
 bottom left: "t"
 Heres an example for a 2x2 map (Zoom=1)
 [ q  r ]
 [ t  s ]

 Heres an example for a 4x4 map (Zoom=2)
 [ qq  qr  rq  rr ]  
 [ qt  qs  rt  rs ]
 [ tq  tr  sq  sr ]
 [ tt  ts  st  ss ]
*/

// store the map width and Zoom level 
	int w, z0;   
	String[] Table = { "q", "r", "t", "s" };

// recursive function for character concatenation
// maybe not too fast but a bit easier to understand
String BuildTileName(int z, int X, int Y)
{
	if(z==0) return "";	

	int w1 = w>>(z0-z);    
	int x1 = ((X%w1)<<1)/w1;
	int y1 = ((Y%w1)<<1)/w1;

	String s = Table[(y1<<1) + x1];
	return s + BuildTileName(z-1, X, Y);
}