(function(){"use strict";function rbush(maxEntries,format){if(!(this instanceof rbush))return new rbush(maxEntries,format);this._maxEntries=Math.max(4,maxEntries||9);this._minEntries=Math.max(2,Math.ceil(this._maxEntries*.4));if(format){this._initFormat(format)}this.clear()}rbush.prototype={all:function(){return this._all(this.data,[])},search:function(bbox){var node=this.data,result=[],toBBox=this.toBBox;if(!intersects(bbox,node.bbox))return result;var nodesToSearch=[],i,len,child,childBBox;while(node){for(i=0,len=node.children.length;i<len;i++){child=node.children[i];childBBox=node.leaf?toBBox(child):child.bbox;if(intersects(bbox,childBBox)){if(node.leaf)result.push(child);else if(contains(bbox,childBBox))this._all(child,result);else nodesToSearch.push(child)}}node=nodesToSearch.pop()}return result},collides:function(bbox){var node=this.data,toBBox=this.toBBox;if(!intersects(bbox,node.bbox))return false;var nodesToSearch=[],i,len,child,childBBox;while(node){for(i=0,len=node.children.length;i<len;i++){child=node.children[i];childBBox=node.leaf?toBBox(child):child.bbox;if(intersects(bbox,childBBox)){if(node.leaf||contains(bbox,childBBox))return true;nodesToSearch.push(child)}}node=nodesToSearch.pop()}return false},load:function(data){if(!(data&&data.length))return this;if(data.length<this._minEntries){for(var i=0,len=data.length;i<len;i++){this.insert(data[i])}return this}var node=this._build(data.slice(),0,data.length-1,0);if(!this.data.children.length){this.data=node}else if(this.data.height===node.height){this._splitRoot(this.data,node)}else{if(this.data.height<node.height){var tmpNode=this.data;this.data=node;node=tmpNode}this._insert(node,this.data.height-node.height-1,true)}return this},insert:function(item){if(item)this._insert(item,this.data.height-1);return this},clear:function(){this.data={children:[],height:1,bbox:empty(),leaf:true};return this},remove:function(item){if(!item)return this;var node=this.data,bbox=this.toBBox(item),path=[],indexes=[],i,parent,index,goingUp;while(node||path.length){if(!node){node=path.pop();parent=path[path.length-1];i=indexes.pop();goingUp=true}if(node.leaf){index=node.children.indexOf(item);if(index!==-1){node.children.splice(index,1);path.push(node);this._condense(path);return this}}if(!goingUp&&!node.leaf&&contains(node.bbox,bbox)){path.push(node);indexes.push(i);i=0;parent=node;node=node.children[0]}else if(parent){i++;node=parent.children[i];goingUp=false}else node=null}return this},toBBox:function(item){return item},compareMinX:function(a,b){return a[0]-b[0]},compareMinY:function(a,b){return a[1]-b[1]},toJSON:function(){return this.data},fromJSON:function(data){this.data=data;return this},_all:function(node,result){var nodesToSearch=[];while(node){if(node.leaf)result.push.apply(result,node.children);else nodesToSearch.push.apply(nodesToSearch,node.children);node=nodesToSearch.pop()}return result},_build:function(items,left,right,height){var N=right-left+1,M=this._maxEntries,node;if(N<=M){node={children:items.slice(left,right+1),height:1,bbox:null,leaf:true};calcBBox(node,this.toBBox);return node}if(!height){height=Math.ceil(Math.log(N)/Math.log(M));M=Math.ceil(N/Math.pow(M,height-1))}node={children:[],height:height,bbox:null,leaf:false};var N2=Math.ceil(N/M),N1=N2*Math.ceil(Math.sqrt(M)),i,j,right2,right3;multiSelect(items,left,right,N1,this.compareMinX);for(i=left;i<=right;i+=N1){right2=Math.min(i+N1-1,right);multiSelect(items,i,right2,N2,this.compareMinY);for(j=i;j<=right2;j+=N2){right3=Math.min(j+N2-1,right2);node.children.push(this._build(items,j,right3,height-1))}}calcBBox(node,this.toBBox);return node},_chooseSubtree:function(bbox,node,level,path){var i,len,child,targetNode,area,enlargement,minArea,minEnlargement;while(true){path.push(node);if(node.leaf||path.length-1===level)break;minArea=minEnlargement=Infinity;for(i=0,len=node.children.length;i<len;i++){child=node.children[i];area=bboxArea(child.bbox);enlargement=enlargedArea(bbox,child.bbox)-area;if(enlargement<minEnlargement){minEnlargement=enlargement;minArea=area<minArea?area:minArea;targetNode=child}else if(enlargement===minEnlargement){if(area<minArea){minArea=area;targetNode=child}}}node=targetNode}return node},_insert:function(item,level,isNode){var toBBox=this.toBBox,bbox=isNode?item.bbox:toBBox(item),insertPath=[];var node=this._chooseSubtree(bbox,this.data,level,insertPath);node.children.push(item);extend(node.bbox,bbox);while(level>=0){if(insertPath[level].children.length>this._maxEntries){this._split(insertPath,level);level--}else break}this._adjustParentBBoxes(bbox,insertPath,level)},_split:function(insertPath,level){var node=insertPath[level],M=node.children.length,m=this._minEntries;this._chooseSplitAxis(node,m,M);var splitIndex=this._chooseSplitIndex(node,m,M);var newNode={children:node.children.splice(splitIndex,node.children.length-splitIndex),height:node.height,bbox:null,leaf:false};if(node.leaf)newNode.leaf=true;calcBBox(node,this.toBBox);calcBBox(newNode,this.toBBox);if(level)insertPath[level-1].children.push(newNode);else this._splitRoot(node,newNode)},_splitRoot:function(node,newNode){this.data={children:[node,newNode],height:node.height+1,bbox:null,leaf:false};calcBBox(this.data,this.toBBox)},_chooseSplitIndex:function(node,m,M){var i,bbox1,bbox2,overlap,area,minOverlap,minArea,index;minOverlap=minArea=Infinity;for(i=m;i<=M-m;i++){bbox1=distBBox(node,0,i,this.toBBox);bbox2=distBBox(node,i,M,this.toBBox);overlap=intersectionArea(bbox1,bbox2);area=bboxArea(bbox1)+bboxArea(bbox2);if(overlap<minOverlap){minOverlap=overlap;index=i;minArea=area<minArea?area:minArea}else if(overlap===minOverlap){if(area<minArea){minArea=area;index=i}}}return index},_chooseSplitAxis:function(node,m,M){var compareMinX=node.leaf?this.compareMinX:compareNodeMinX,compareMinY=node.leaf?this.compareMinY:compareNodeMinY,xMargin=this._allDistMargin(node,m,M,compareMinX),yMargin=this._allDistMargin(node,m,M,compareMinY);if(xMargin<yMargin)node.children.sort(compareMinX)},_allDistMargin:function(node,m,M,compare){node.children.sort(compare);var toBBox=this.toBBox,leftBBox=distBBox(node,0,m,toBBox),rightBBox=distBBox(node,M-m,M,toBBox),margin=bboxMargin(leftBBox)+bboxMargin(rightBBox),i,child;for(i=m;i<M-m;i++){child=node.children[i];extend(leftBBox,node.leaf?toBBox(child):child.bbox);margin+=bboxMargin(leftBBox)}for(i=M-m-1;i>=m;i--){child=node.children[i];extend(rightBBox,node.leaf?toBBox(child):child.bbox);margin+=bboxMargin(rightBBox)}return margin},_adjustParentBBoxes:function(bbox,path,level){for(var i=level;i>=0;i--){extend(path[i].bbox,bbox)}},_condense:function(path){for(var i=path.length-1,siblings;i>=0;i--){if(path[i].children.length===0){if(i>0){siblings=path[i-1].children;siblings.splice(siblings.indexOf(path[i]),1)}else this.clear()}else calcBBox(path[i],this.toBBox)}},_initFormat:function(format){var compareArr=["return a"," - b",";"];this.compareMinX=new Function("a","b",compareArr.join(format[0]));this.compareMinY=new Function("a","b",compareArr.join(format[1]));this.toBBox=new Function("a","return [a"+format.join(", a")+"];")}};function calcBBox(node,toBBox){node.bbox=distBBox(node,0,node.children.length,toBBox)}function distBBox(node,k,p,toBBox){var bbox=empty();for(var i=k,child;i<p;i++){child=node.children[i];extend(bbox,node.leaf?toBBox(child):child.bbox)}return bbox}function empty(){return[Infinity,Infinity,-Infinity,-Infinity]}function extend(a,b){a[0]=Math.min(a[0],b[0]);a[1]=Math.min(a[1],b[1]);a[2]=Math.max(a[2],b[2]);a[3]=Math.max(a[3],b[3]);return a}function compareNodeMinX(a,b){return a.bbox[0]-b.bbox[0]}function compareNodeMinY(a,b){return a.bbox[1]-b.bbox[1]}function bboxArea(a){return(a[2]-a[0])*(a[3]-a[1])}function bboxMargin(a){return a[2]-a[0]+(a[3]-a[1])}function enlargedArea(a,b){return(Math.max(b[2],a[2])-Math.min(b[0],a[0]))*(Math.max(b[3],a[3])-Math.min(b[1],a[1]))}function intersectionArea(a,b){var minX=Math.max(a[0],b[0]),minY=Math.max(a[1],b[1]),maxX=Math.min(a[2],b[2]),maxY=Math.min(a[3],b[3]);return Math.max(0,maxX-minX)*Math.max(0,maxY-minY)}function contains(a,b){return a[0]<=b[0]&&a[1]<=b[1]&&b[2]<=a[2]&&b[3]<=a[3]}function intersects(a,b){return b[0]<=a[2]&&b[1]<=a[3]&&b[2]>=a[0]&&b[3]>=a[1]}function multiSelect(arr,left,right,n,compare){var stack=[left,right],mid;while(stack.length){right=stack.pop();left=stack.pop();if(right-left<=n)continue;mid=left+Math.ceil((right-left)/n/2)*n;select(arr,left,right,mid,compare);stack.push(left,mid,mid,right)}}function select(arr,left,right,k,compare){var n,i,z,s,sd,newLeft,newRight,t,j;while(right>left){if(right-left>600){n=right-left+1;i=k-left+1;z=Math.log(n);s=.5*Math.exp(2*z/3);sd=.5*Math.sqrt(z*s*(n-s)/n)*(i-n/2<0?-1:1);newLeft=Math.max(left,Math.floor(k-i*s/n+sd));newRight=Math.min(right,Math.floor(k+(n-i)*s/n+sd));select(arr,newLeft,newRight,k,compare)}t=arr[k];i=left;j=right;swap(arr,left,k);if(compare(arr[right],t)>0)swap(arr,left,right);while(i<j){swap(arr,i,j);i++;j--;while(compare(arr[i],t)<0)i++;while(compare(arr[j],t)>0)j--}if(compare(arr[left],t)===0)swap(arr,left,j);else{j++;swap(arr,j,right)}if(j<=k)left=j+1;if(k<=j)right=j-1}}function swap(arr,i,j){var tmp=arr[i];arr[i]=arr[j];arr[j]=tmp}if(typeof define==="function"&&define.amd)define("rbush",function(){return rbush});else if(typeof module!=="undefined")module.exports=rbush;else if(typeof self!=="undefined")self.rbush=rbush;else window.rbush=rbush})();