Not that it’s easy to visualize, but Joe Tucker’s contact point system can be fine grained enough to define all cut angles. His system uses ten segments, but once you look at the system, you can easily see how you can look at the balls with points rather than segments. But segments are easier to present the system.I don't think any aiming system works at any level without "incorporating elements outside of that system". No system is fine grained enough to define all cut angles (much less cover all the physical variables) without "user input" from the beginning.
pj
chgo
I don’t use Joe Tucker’s system, but it’s out there.