Three.jsでカーソルとの衝突判定する方法 ref: http://qiita.com/items/9107051360c2683b2520

file0.txt

var projector = new THREE.Projector();
var mouseX = e.clientX -getElementPosition(renderer.domElement).left;
var mouseY = e.clientY - getElementPosition(renderer.domElement).top;
var x = (mouseX / renderer.domElement.width) * 2 - 1;
var y = -(mouseY/renderer.domElement.height) * 2 + 1;
var vector = new THREE.Vector3(x, y, 1);
projector.unprojectVector(vector, camera);

file1.txt

var vector = 
var ray = new THREE.Raycaster(
            camera.position,
            vector.sub(camera.position).normalize());
// 視点位置から対象オブジェクトへのベクトル

file2.txt

var intersects = ray.intersectObjects(BB.eventMeshList);