raycaster is not work

i want to check obj1 is intersect obj2 or not in axis x direction，i use this method，but it is not work,can you give some advice?thanks very much!
var raycaster = new v3d.Raycaster(obj1.position,new v3d.Vector3(1, 0, 0),0,10000);
var intersects = raycaster.intersectObject(obj2);