int cy=(_pickY+y)/2;
float t=Math.max(Math.abs(_pickX-x),Math.abs(_pickY-y))/2.f;
pickCanvas.setTolerance(t);
pickCanvas.setShapeLocation(cx, cy);
if(t>2.){
PickResult[] result = pickCanvas.pickAll();
if(result==null){
select(add,new Node[0]);
}
else{
Node[] n=new Node[result.length];