Race Sim Central
Rec.Autos.Simulators Archive

GPL AI glitch and Physics Anomoly

8 posts by 7 people · 26 Nov 1998 - 02 Dec 1998

Jeff Ha 26 Nov 1998#436648
One to add to the AI quirks and another wierd physcis issue. While racing at the Dutch circuit with 19 AI I was stalking McClaren. As we came down the hill and around the final right hander, I got on the throttle earlier than he did and was looking to pass him on the front straight. The flagman held up the slow car ahead sign as we flashed past and rather than move over to the left, the lead car slammed on his brakes! Needless to say, with me accelerating on his tail, we had a major coming together. He continued, I had a broken front wheel. What a time for a brake test! The wierd physcs deal I've seen before. I was racing on-line at Rouen and I was braking for the hairpin but not having really good luck doing it. I almost got it stopped but ended up taping the guy in front turning in. Rather than a little nudge, I was sent flying into the air and the Lotus I hit bounced around like a pinball-- off the tires, back into me several times and ended up catching on fire. All this from a simple 30 mph nudge!. I had this same thing happen at Monaco at the loew's hairpin when a Ferrari bumped a guy behind me, the Lotus bumped me and some how the guy who started it (at very slow speed) ended up at the bottom of the hairpin straight severely damaged and on fire. How he flew over the both of us is beyond me. The collisions seem to be a bit over the top at times. I have also seen some bizarre stuff at starts. From standing stationary I've been thrown up into the air, watched other cars thrown up into the air. I don't know if this happens when people join the race late after the flag drops and then are dropped into the moving grid or what. This might be the reason. Jeff
ymenard 26 Nov 1998#436649
Jeff Haas wrote Online things are a little different. The same can be applied for the NROS. Because of the warp issue found via racing over the Internet, your car may appear for a moment at a relatively high speed for a little fraction of the second. If during that time you get a car-to-car contact you will see the fun but bizarre wreck that sends you way up in the air ;) . Since if I remember the prediction code is not in GPL (Im not sure about that), you will have stuff like that. Im not sure, still, but it might be also that the Z-axis of the new game engine isn't totally perfected ;( - Fran?ois Mnard <ymenard> Good race at the Brickyard! - Official Mentally retarded guy of r.a.s. - Excuse me for my English (I'm French speaking) - Sponsored by http://www.awpss.com/ on the NROS - "People think it must be fun to be a super genius, but they don't realise how hard it is to put up with all the idiots in the world."--
Remco Moedt 26 Nov 1998#436650
>I have also seen some bizarre stuff at starts. From standing >stationary I've been thrown up into the air, watched other cars thrown >up into the air. I don't know if this happens when people join the >race late after the flag drops and then are dropped into the moving >grid or what. This might be the reason. It has something to do with warping. If your car, due to warping, "overlap" another car by, say 10", you can imagine what force is needed to do that. The physics engine respond to that, with this strange behaviour as a result. You only experience it on-line. Remco
Jeff Ha 27 Nov 1998#436854
Thanks, you know I never considered the warping aspect as a cause to create those forces but it makes sense. This is my first real experience with on-line games. Thanks. Jeff
SteveBla 27 Nov 1998#436855
Not so sure about that. I have a short replay of an offline race in which I get together with an AI car in Eau Rouge at Spa and go sliding benignly along the armco. Next thing you know, my car is catapulted vertically about 2 or 3 times the height of those tall trees on the hill left of the track, flipping endlessly about its rear axle as both front wheels go positively into orbit. You could see into Germany from up there. I don't know what happened there, but it sure wasn't realistic. WAS pretty cool, though, and the scenery graphics go all weird from a quarter-mile up. Email me if you'd like to see it; just make sure your seat is upright and tray table is in the locked position! Steve B. Steve Blankenship remove "nospam" from address for email
Bart Westra 27 Nov 1998#436856
Have a look at this: www.xs4all.nl/~westrab/crashtest.zip The AI (or remote cars when racing online) do not always detect collisions. But once they are acting out of the normal they do, which can give chain reactions. If you try a few times, you can see them piled up 3 high! The mahem is started by the local car colliding with the ai in front of him when he lands on the grid. Bart Westra
Quoted text (12 lines)>>I have also seen some bizarre stuff at starts. From standing >>stationary I've been thrown up into the air, watched other cars thrown >>up into the air. I don't know if this happens when people join the >>race late after the flag drops and then are dropped into the moving >>grid or what. This might be the reason. >It has something to do with warping. If your car, due to warping, >"overlap" another car by, say 10", you can imagine what force is >needed to do that. The physics engine respond to that, with this >strange behaviour as a result. You only experience it on-line. >Remco
David Ewing 30 Nov 1998#437428
Quoted text (12 lines)> >It has something to do with warping. > Not so sure about that. I have a short replay of an offline race in which I > get together with an AI car in Eau Rouge at Spa and go sliding benignly along > the armco. Next thing you know, my car is catapulted vertically about 2 or 3 > times the height of those tall trees on the hill left of the track, flipping > endlessly about its rear axle as both front wheels go positively into orbit. > You could see into Germany from up there. I don't know what happened there, > but it sure wasn't realistic. WAS pretty cool, though, and the scenery > graphics go all weird from a quarter-mile up. Email me if you'd like to see > it; just make sure your seat is upright and tray table is in the locked > position!
I had a similar experience (offline) yesterday while testing at Monza. I was hotlapping in an Eagle when I lost it trying to go flat out around the Ascari bend. I hit the right guard rail at around 165 mph bounced over to the left guard rail and hit it at about 95 mph. So far so good. But after hitting the left rail the car started to spin and took off like a helicopter. It proceeded to climb at least 200 feet in the air. It hit an invisible barrier while up there and came crashing down. It's absolutely hilarious. Is there a site that collects these sort of moments? Dave Ewing
Quoted text (12 lines)> I had a similar experience (offline) yesterday while testing at Monza. > I was hotlapping in an Eagle when I lost it trying to go flat out around > the Ascari bend. I hit the right guard rail at around 165 mph bounced > over to the left guard rail and hit it at about 95 mph. So far so > good. But after hitting the left rail the car started to spin and took > off like a helicopter. It proceeded to climb at least 200 feet in the > air. It hit an invisible barrier while up there and came crashing > down. It's absolutely hilarious. > Is there a site that collects these sort of moments? > Dave Ewing
Did you change anything in gpl.ini? I once copied a driver.ini on top of gpl.ini. All cars behavied like pogo Stick afterward, just bouncing up and down. (Looked rather funny, but very difficult to drive;) bye, Sammy

Sponsors

Affiliate Links

Sim Gaming Expo MOZA Racing Sim-Lab Fanatec TrakRacer Asetek Internet Privacy From NordVPN Dreamhost Capital One Credit Card Application Fanatical CDKeys Amazon Amazon UK Project Motor Racing iRacing Get your racing gloves, boots and more from Demon Tweeks. Enlist at Roberts Space Industries, developers of Star Citizen and Squadron 42


Back from the ashes since July, 2019. First created in 2001 with the merger of Legends Central (founded 1999) and simracing.dk.

A site by a sort of sim racer, for sim racers, about racing sims. News and information on both modern and historic sim racing software titles.

All products and licenses property of their respective owners.


Facebook Threads Bluesky Twitter Mastodon Instagram YouTube Tiktok Twitch Reddit Google News Apple News Subscribe via WordPress Flipboard eBay

Race Sim Central © 1999-2026 | Some links pay RSC a commission. Advertising does not equal endorsement.Cookie Policy