Threejs - Raycast Click Side

by black strings

HTML

<script src="https://rawgit.com/mrdoob/three.js/dev/build/three.js"></script>
<script src="https://rawgit.com/mrdoob/three.js/dev/examples/js/controls/OrbitControls.js"></script>

CSS

/* fix mouse click offset errors when doing drags */
body {
  margin: 0;
}

JavaScript

class Main {
	constructor(){
    this.objects = []; 
    this.scene = new THREE.Scene();
    this.mouse = new THREE.Vector2();
    
    var width = window.innerWidth;
    var height = window.innerHeight * .75;
    this.camera = new THREE.PerspectiveCamera(35, width/height, 0.1, 1000);
    
    this.renderer = new THREE.WebGLRenderer();
    this.renderer.setSize( width, height );
    this.renderer.setClearColor( 0xcccccc, 1 ); 
    
    // controls should set 2nd param or mouse move will be all over the main dom element
    // null on 2nd param, threejs will use the parent as the mouse click and prevent default
    this.controls = new THREE.OrbitControls(this.camera, this.renderer.domElement);
    
    // will turn off zooming while panning with right mouse click, false by default
    this.controls.screenSpacePanning = true;
    
    document.body.appendChild( this.renderer.domElement );
    this.scene.add(this.camera);

    
    this.setToFullOrbit(this.controls);
    this.camera.position.copy(new THREE.Vector3(10,10,10));
    // fix first frame render issue going invisible
    this.camera.lookAt(new THREE.Vector3(0,0,0));

    var axisHelper = new THREE.AxisHelper();
    this.scene.add(axisHelper);
    
    //lights
    this.sun = new THREE.DirectionalLight();
    this.scene.add(this.sun);
    
    this.grid = new THREE.GridHelper(24, 24);
		this.scene.add(this.grid);
    
    this.useBufferGeometry = true;
    this.box;
		this.createScene();

  }
  
  createCube(width, height, depth, isWireframe = false) {
  	var cubeGeo = new THREE.CubeGeometry(width, height, depth);
    var mat = new THREE.MeshLambertMaterial(
    	{
    		opacity: .3, 
        transparent: true, 
    		color: 0x0000ff, 
        wireframe: isWireframe
      }
    );
    var mesh = new THREE.Mesh(cubeGeo, mat);
    this.scene.add(mesh);
    return mesh;
  }
  
  createBufferCube(width, height, depth, isWireframe = false) {
  	var cubeGeo = new THREE.BoxBufferGeometry(width, height, depth);
   ...