Cuboid with ball inside

[sportmaster]

I had an idea: cuboid with the ball inside. It was easy to create a 3d cuboid effect but I've stopped when I was trying to put the ball inside of it. The Ball was to be displayed by canvas in proper zoom and changing it's position depending on the inclination angle of the cuboid. After a few hours of contriving I gave up. But I know that you can do this! and you will tell me how, and I'll be happy !