Tangibility radius

The tangibility radius of an object is a property of the object that determines the radius in which it will be tangible and able to be collided or interacted with. When Mario's distance to the object is less than the tangibility radius (i.e. he's inside the tangibility sphere), the object will be tangible; when he's outside of the tangibility radius, it will be intangible. Tangibility radii were implemented for efficiency; the game can avoid wasting time checking collisions of an object with, for example, Mario, when Mario is so far away from the object that he can't possibly be interacting with it.