Recent content by TheRooster

Rail compression and multi-body collisions are definitely the two main difficult points of pool simulation. The theory of this model assumes the bodies "do not change configuration" during the collision, but there is an equation for displacement of the contact point during the collision. I've...

I'm writing a pool simulator for fun, and recently I improved the ball-rail collision model so that 2x and 3x cross side banks are more realistic! Videos are played back at 0.1x real time. Twice Across: Thrice Across: (Here's a recent, related AZBilliards post...

I was able to do this 5 rails finally.

I’ve got a 644 FargoRating and I happened to attempt this drill recently on a black-label Diamond with 4 1/8” pockets. It can be brutal going around the corner of the L. I think back-to-back success would be very difficult for me. Anyway, I’d like to give this challenge a try on a standard...

I moved away, so I’m not sure. I doubt the atmosphere has changed significantly.

I think The Rack in Livonia has the best tables. They added a bar recently.

Earlier I said: But you just made me realize that actually, it should be able to measure throw angle even without a known shot angle, because it should be able to calculate the normal impulse and the tangential (frictional) impulse. This could also calculate the effective coefficient of...

Interesting idea. I can’t make a recommendation on whether it makes sense to include the feature. I do think exact cut angle would be useful to know. We obviously know if we over or under cut a ball by where it goes, but it could be useful to learn if you think a shot is more of a cut or less...

Yeah if there is a long history of mixed results, this is less likely to be fraudulent data.

I wonder if Mike Page has any thoughts on this. Depending on how often this is done and what the review process is, it could introduce a systematic bias in the Salotto data.

For those interested in the physics of this shot, this video discusses a similar phenomenon for super balls. It’s the same principle for these banks, but the tangential compliance is in the rail instead of the ball.

Well, I tried tonight for about 15 minutes. I was able to get about 80% of the way back to the side pocket after 5 rails. Diamond table. Hard to keep the ball on the table. Makes me feel like it’s possible but the stars have to align. Maybe fast cloth would help.

I think I’ve gotten close to making it 5 rails, but it’s tough to get enough speed on the ball. Can’t remember if I’d made it or not.. I’ll have to try.

I think the difference in throw between a waxed/lubricated ball and a normal ball could be that large with a slow stun shot at that angle.

This is a pretty good point. I can also think of a scenario where a long safety battle causes both players’ clocks to be low so instead of trying to run out they try to “flag” the other player (make their time run out). I’ll have to think about this more. That might add an interesting element...