Raycaster does not find intersect even though it should

Question

I am using a raycaster for a projection of a point onto a face. But somehow that doesn't seem to work. I.e. taking point (25,25,300) and direction (0,0,-1) the raycaster doesn't find and intersect with a box of size (30,30,30) located at (0,0,0). Am I doing sth wrong?

var geometry = new THREE.BoxGeometry(30, 30, 30);
var material = new THREE.MeshBasicMaterial( );
var mesh = new THREE.Mesh(geometry, material);
var dir = new THREE.Vector3(0,0,-1);
var p = new THREE.Vector3(25,25,300);
var raycaster = new THREE.Raycaster(p, dir);
var intersects = raycaster.intersectObjects(mesh); // returns an empty array

Answer 1

There are two problems with your example, first is that you are using the method raycaster.intersectObjects which takes an array as argument, when you should be using raycaster.intersectObject which takes an object.

Secondly, you are missing the mesh.

Try these values: var p = new THREE.Vector3(15,15,300); instead. The image below illustrates the problem..