Archive: 6 posts

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This is not really a help request, nor is it a tutorial. It's just a discovery, and may I say quite a disturbing one. So I wanted to heat up a discussion about this. I think I've got quite some experience with randomizers and picker devices of all sorts. I've never found a thermo-friendly way of achieving that only 1 output gets picked at a time though. Then, someone mentioned that paintballs can only hit one paint switch at once, thus being the perfect picker elements. I was fascinated and tried to build such a device for my newest survival challenge. My goal was to achieve equal distribution on 5 possible One-Shot outputs. I created a pentagon, separated all 5 sides by using the corner editing tool (so that every side was a piece of material on its own) and added a centered motor bolt. An emitter shot paintballs with speed 5 onto the surface of the rotating pentagon at a given interval. After a few rounds of testing and tweaking, something happened; a paintball hit the edge of two adjacent sides, and - SPLAT - both paint switches were activated simultaneously. My head asploded, so I turned my PS3 off and didn't yet try to recreate it, but I've seen it with my own fear-filled eyes. Plus, the pentagon was rotating at low speed (5.0) and the paintballs emitted at low velocity (5.0), so I don't think it was due to a collision detection issue. Seems like the "on impact" setting (which paint switches are based on, I think) does work like a very exact, but still not 100% reliable, shape-adapted mag switch. What do you think?

2009-11-14 11:42:00 Author: Treas Posts: 223

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Well, it sounds like the paint ball simply collided with 2 objects. it's possible and perfectly reasonable I suppose. It would have to be spot on fo it to happen that way, but I don't see why it couldn't. It's a very useful find though.

2009-11-14 11:57:00 Author: rtm223 Posts: 6497

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was the pentagon made of dark matter? because the rounded edges of DM arn't a true representation of the actuall vertices. So the paintball could of hit 2 edges at the same time.

2009-11-14 12:29:00 Author: theamilien Posts: 485

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In order to prevent the paintball from hitting 2 sides at a time, you could create a gap between the sides, so that in the event it hit perfectly and would hit both, it would soar through and not activate any.

2009-11-14 17:23:00 Author: Burnvictim42 Posts: 3322

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In order to prevent the paintball from hitting 2 sides at a time, you could create a gap between the sides, so that in the event it hit perfectly and would hit both, it would soar through and not activate any. To my mind that is just as undesirable - why would you want a randomiser that sometimes outputs nothing? Obviously it depends on your application, but generally you want 1 (and only 1) output. I believe there is a randomiser provided in the LBPC Advanced logic pack that provides a 100% reliable way of achieving this

2009-11-14 17:26:00 Author: rtm223 Posts: 6497

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Okay, fine How about more of a notched wheel shape? http://i240.photobucket.com/albums/ff297/Burnvictim42/LBP/wheel.jpg there ya go. If the paintball WOULD have hit both by sailing through the crack, it'd end up sailing through and hitting the next notch instead. It just took me a sec to figure out a clean shape

2009-11-14 17:40:00 Author: Burnvictim42 Posts: 3322

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