Well, if c is the distance between the objects, a is what you measured to object 1, b is what you measured to object 2, and the angle that the servo had to turn to get from object a to object b is T, then the law of cosines says that:

c^2 = a^2 + b^2 + 2*a*b*cos(T)

It's sort of a generalization of Pythagorean Theorem, but it works when the triangle isn't a right angled triangle. You put your stuff into that equation and take the square root and that is the distance between the objects. Was that what you were looking for?

MIKE