From 4d9f29afaba5f0eddf34ac73614b36fabd0d5353 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Tue, 3 Feb 2015 20:15:58 +0100
Subject: Add mipmap support to allow zooming out

---
 viewer/MinedMap.js | 35 +++++++++++++++++++++--------------
 viewer/index.html  |  2 +-
 2 files changed, 22 insertions(+), 15 deletions(-)

(limited to 'viewer')

diff --git a/viewer/MinedMap.js b/viewer/MinedMap.js
index c8a41df..a949cce 100644
--- a/viewer/MinedMap.js
+++ b/viewer/MinedMap.js
@@ -1,7 +1,6 @@
 var MinedMapLayer = L.GridLayer.extend({
-	initialize: function (info, regions, layer) {
-		this._info = info;
-		this._regions = regions;
+	initialize: function (mipmaps, layer) {
+		this._mipmaps = mipmaps;
 		this._layer = layer;
 
 		this.options.attribution = 'Generated by <a href="http://git.universe-factory.net/MinedMap/">MinedMap</a>';
@@ -19,10 +18,19 @@ var MinedMapLayer = L.GridLayer.extend({
 
 		tile.alt = '';
 
-		if (coords.x >= this._info.minX && coords.x <= this._info.maxX &&
-		    coords.y >= this._info.minZ && coords.y <= this._info.maxZ &&
-		    this._regions[coords.y-this._info.minZ][coords.x-this._info.minX])
-			tile.src = 'data/'+this._layer+'/0/r.'+coords.x+'.'+coords.y+'.png';
+		var z = -coords.z;
+		if (z < 0)
+			z = 0;
+
+		var mipmap = this._mipmaps[z];
+
+		if (coords.x >= mipmap.info.minX && coords.x <= mipmap.info.maxX &&
+		    coords.y >= mipmap.info.minZ && coords.y <= mipmap.info.maxZ &&
+		    mipmap.regions[coords.y-mipmap.info.minZ][coords.x-mipmap.info.minX])
+			tile.src = 'data/'+this._layer+'/'+z+'/r.'+coords.x+'.'+coords.y+'.png';
+
+		if (coords.z >= 0)
+			L.DomUtil.addClass(tile, 'overzoomed');
 
 		return tile;
 	},
@@ -70,24 +78,23 @@ window.createMap = function () {
 	var xhr = new XMLHttpRequest();
 	xhr.onload = function () {
 		var res = JSON.parse(this.responseText),
-		    info = res.info,
-		    regions = res.regions,
+		    mipmaps = res.mipmaps,
 		    spawn = res.spawn;
 
 		var map = L.map('map', {
 			center: [-spawn.z, spawn.x],
 			zoom: 0,
-			minZoom: 0,
+			minZoom: -(mipmaps.length-1),
 			maxZoom: 3,
 			crs: L.CRS.Simple,
 			maxBounds: [
-				[-512*(info.maxZ+1), 512*info.minX],
-				[-512*info.minZ, 512*(info.maxX+1)],
+				[-512*(mipmaps[0].info.maxZ+1), 512*mipmaps[0].info.minX],
+				[-512*mipmaps[0].info.minZ, 512*(mipmaps[0].info.maxX+1)],
 			],
 		});
 
-		var mapLayer = new MinedMapLayer(info, regions, 'map');
-		var lightLayer = new MinedMapLayer(info, regions, 'light');
+		var mapLayer = new MinedMapLayer(mipmaps, 'map');
+		var lightLayer = new MinedMapLayer(mipmaps, 'light');
 
 		mapLayer.addTo(map);
 
diff --git a/viewer/index.html b/viewer/index.html
index 44681d0..245806e 100644
--- a/viewer/index.html
+++ b/viewer/index.html
@@ -22,7 +22,7 @@
         background: #333;
       }
 
-      img.leaflet-tile {
+      img.overzoomed {
         image-rendering: -moz-crisp-edges;
         image-rendering: -o-crisp-edges;
         image-rendering: -webkit-optimize-contrast;
-- 
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