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Vector,d=0;for(g=0,h=b.length;g0&&e0&&f.divide(d),f.limit(this._options.max_force),f},a.prototype._cohere=function(a,b){var c,d,e,f,g,h;f=new Vector,d=0;for(g=0,h=b.length;g0&&e0?this._steer_to(a,f.divide(d)):f},a.prototype._steer_to=function(a,b){var c,d,e;return d=Vector.subtract(b,a.location),c=d.magnitude(),c>0?(d.normalize(),c<100?d.multiply(this._options.max_speed*(c/100)):d.multiply(this._options.max_speed),e=d.subtract(a.velocity),e.limit(this._options.max_force)):e=new Vector(0,0),e},a.prototype._wrapIfNeeded=function(a){a.location.xthis._wrap_borders.east&&(a.location.x=this._wrap_borders.west);if(a.location.y>this._wrap_borders.south)return a.location.y=this._wrap_borders.north},a}(),d3.layout.flock=function(b){return new a(b)}}.call(this),function(){}.call(this)