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Evaluation of Collision Handling Techniques in 2 D collisions

In this paper we study the animation in two dimensions of disks moving at a constant velocity in a frictionless environment. We analyze the effect of collisions between disks and between a disk and an edge. There are two approaches to animation – Periodic Interference Test (PIT) which computes the velocities of the disks at each frame and Predicted Instant of Collision (PIC) which computes the exact time at which collision occurs, advances the animation to this point and then calculates the new velocities exactly at the point of collision. This paper describes these two approaches and their associated advantages and disadvantages.