Does any of you have an idea of how to model the behavior of a bouncing ball with STELLA (ISEE Systems)? I have only been able to get my model to show correctly the first two cycles of the bouncing motion. My idea is to have STELLA to plot the first cycle and have a variable to multiply the initial velocity of the movement by the elastic coefficient e, but it seems it is impossible for STELLA to have a variable to be incremented in a discrete manner, only continous. I have searched Google and found nothing. Could it be that STELLA can only be used to model time-continous variables and cannot handle discrete variables?