[2021] shell trajectory after impact

While I don't have an extreme amount of depth to give you on this topic, there is a "normalization" which models the shell "biting" into the armor and adjusting its path because of it. As for modeling some crazy richochets and stuff, that I'm not sure on.

Here's the part in the AP Shell/Armor explainer video that talks about Normalization.

Direct Video Link: https://youtu.be/yQcutrneBJQ?t=307