text: var PTAM=function(){function e(){function t(e,t,n){var r=e.slice((n||t)+1||e.length);return e.length=t<0?e.length+t:t,e.push.apply(e,r)}function n(t,n){e[t]||(e[t]=[]),e[t].push(n)}function r(r,i){n(r,function(){return t(e[r],e[r].indexOf(i)),i.apply(this,arguments)})}function i(t){var n=e[t];if(!n||!n.length)return;var r=Array.prototype.slice.call(arguments,1);n=n.slice();for(var i=0,s=n.length;i<s;i++)n[i].apply(null,r)}var e={};this.on=n,this.once=r,this.emit=i}function t(){}function n(){this.mapMaker=new t}return n.prototype.onImage=function(){},n.prototype.onVelocityHint=function(){},n.prototype.onOrientationHint=function(){},n};