var MinedMapLayer = L.GridLayer.extend({ initialize: function (info, regions) { this._info = info; this._regions = regions; this.options.attribution = 'Generated by MinedMap'; if (!L.Browser.android) { this.on('tileunload', this._onTileRemove); } }, createTile: function (coords, done) { var tile = document.createElement('img'); tile.onload = L.bind(this._tileOnLoad, this, done, tile); tile.onerror = L.bind(this._tileOnError, this, done, tile); 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/r.'+coords.x+'.'+coords.y+'.png'; return tile; }, _tileOnLoad: function (done, tile) { done(null, tile); }, _tileOnError: function (done, tile, e) { done(e, tile); }, _getTileSize: function () { var map = this._map, zoom = map.getZoom(); if (zoom > 0) return Math.round(map.getZoomScale(map.getZoom(), 0) * 512); else return 512; }, _onTileRemove: function (e) { e.tile.onload = null; e.tile.src = L.Util.emptyImageUrl; }, _abortLoading: function () { var i, tile; for (i in this._tiles) { tile = this._tiles[i].el; tile.onload = L.Util.falseFn; tile.onerror = L.Util.falseFn; if (!tile.complete) { tile.src = L.Util.emptyImageUrl; L.DomUtil.remove(tile); } } } }); window.createMap = function () { var xhr = new XMLHttpRequest(); xhr.onload = function () { var res = JSON.parse(this.responseText), info = res.info, regions = res.regions, spawn = res.spawn; var map = L.map('map', { center: [-spawn.z, spawn.x], zoom: 0, minZoom: 0, maxZoom: 3, crs: L.CRS.Simple, maxBounds: [ [-512*(info.maxZ+1), 512*info.minX], [-512*info.minZ, 512*(info.maxX+1)], ], }); (new MinedMapLayer(info, regions)).addTo(map); }; xhr.open('GET', 'data/info.json', true); xhr.send(); }