three.js raycaster project to pick and display XYZ point coordinates on the surface of a 3D model (.obj).

Update the attached project to use raycasting to determine XYZ coordinates on the surface of a 3D model based on mouse pointer position over the 3D model, upon mouse button double click. Display the coordinates in an alert box. On mouse move show a graphic marker depicting current raycast point on surface of the 3D model. The goal is to be able to pick features on the surface of the 3D model and obtain XYZ coordinates of the picked point.