Question: Contact Event with MapleSim

Hello!

I want to make a model with an inner moving circle touching a non-moving, stiff outer circle. 2 differential equations describe the movement of the inner circle, i already have modelled thisand i have the x and y coordinates of the most "exposed point" which will touch the outer circle, as output variables (i could also add the derivatives as output). When the 2 circles touch, i want to "tell" the differential equation model the 2 new derivatives for x and y to model the correct movement change of the inner circle (also got those 2 equations).

Is it possible to model the stiff, non moving outer circle, and to draw it?

How would MapleSim handle the contact events of the two circles, and what are my options to find the exact touching points as good as possible?

Thank You.