Calculating rotation along a path

Question

I am trying to animate an object, let\'s say its a car. I want it go from point

x1,y1,z1

to point x2,y2,z2 . It moves to those points, but

Answer 1

I think interpolating is giving the drift you are seeing. You need to model the way steering works .. your update function should 1) move the car always in the direction of where it is pointing and 2) turn the car toward the current target .. one should not affect the other so that the turning will happen and complete more rapidly than the arriving.