 | | Re: OK here's the real problem! (Was: Re: Finding a rotation matrix for a triangle) [DAT]
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(...) Take the edge line: 1 2 -30 4 10 -3.69552 0 -1.53073 0 1 0 1.53073 0 -3.69552 1-4edge.dat Put it in a separate subfile. Include that subfile with no rotation matrix. Now apply a new MLCad rotation to the subfile. Finally inline the subfile to (...) (20 years ago, 6-Dec-05, to lugnet.cad, FTX)
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| | Re: OK here's the real problem! (Was: Re: Finding a rotation matrix for a triangle)
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(...) I think my interpratation from the last time was halfway there and this explains it much better so we're definitely getting somewhere faster now :). You should be able to use the formula I gave in the last reply instead of an XYZ+angle in (...) (20 years ago, 6-Dec-05, to lugnet.cad, FTX)
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| | OK here's the real problem! (Was: Re: Finding a rotation matrix for a triangle)
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Well, I think I've tried to explain what I need to do 3-4 times already, which is where I think the language barriers have played a pretty big role... The reason I tried to cook the problem down, is to reduce confusion, but I guess that was a bad (...) (20 years ago, 6-Dec-05, to lugnet.cad, FTX)
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| | Re: Vehicle with square wheels
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(...) Right, Steve - keeping the wheels in sync may be the problem. You're onto something with the split in the chassis, though, and I thought of a three-wheeled version, where the front single wheel can pivot, like on a tricycle. I found this (...) (20 years ago, 6-Dec-05, to lugnet.technic, lugnet.robotics)
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| | Re: Is it possible to use LDView as POV-Ray previewer?
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(...) Well, yes, but could you try generating these parameters in stead: location sky look_at angle These should be adequate to fully describe the camera. ldglite uses them (URL) I have already made a -csky option. My impression has always been that (...) (20 years ago, 6-Dec-05, to lugnet.cad.ray)
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| | Re: Vehicle with square wheels
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(...) I think one way to steer it is to split the robot in half, and twist in the middle. However, that will make it hard to keep the front and back wheels in sync. Steve (20 years ago, 6-Dec-05, to lugnet.technic, lugnet.robotics)
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| | Vehicle with square wheels
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I saw this linked on Slashdot: (URL) Allow me to cut through the inventor's verbosity and translate the concept: The square wheels are mechanically linked and turn in unison, but they're offset from each other. The weight at the top of the vehicle (...) (20 years ago, 6-Dec-05, to lugnet.technic, lugnet.robotics, FTX)
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| | Unsubscribing (ws Re: Design
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(...) Suggestion: Determine where your subscription is coming from. It could be coming from two places, since the list is gatewayed for obscure historical reasons. From the header page, (URL) : Note: The lugnet.robotics newsgroup and the (...) (20 years ago, 6-Dec-05, to lugnet.robotics)
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| | Re: Design
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(...) I had a question from a student the other day (I teach Biophysics at a university) who asked why engineering doesn't follow the same mechanism as evolution (if evoution works so well, why not emulate it?). The brief answer is becuse, for (...) (20 years ago, 6-Dec-05, to lugnet.robotics)
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| | Re: Implecations of 6 LEGO Units Thick Fence
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(...) (snip) (...) Oooh, thanks, Mat! later, James Mathis (20 years ago, 6-Dec-05, to lugnet.build.arch, lugnet.trains, FTX)
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| | Re: Design
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(...) Most of what you say is very reasonable but that particular argument is one I have difficullty with. It's a seductive idea. It was an AI attitude for thirty years and still is in some quarters. The idea is that you can write elegant algorithms (...) (20 years ago, 6-Dec-05, to lugnet.robotics)
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| | Re: Design
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(...) space (...) I think that the whole AI community was chastened by SHRDLU (or, at least, 99.9% of them were). It seemed like a huge success: "Why did you clear off the blue cube?" "To put the red pyramid on top of it." It looked like a real (...) (20 years ago, 6-Dec-05, to lugnet.robotics)
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| | Giochi Sforzeschi: indicazioni stradali
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Qualcuno sa dirmi che strada conviene fare (arrivando dalla A1) e dove conviene parcheggiare? Ciao Mario (20 years ago, 6-Dec-05, to lugnet.org.it.itlug)
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| | Re: MOTM / SOTM Voting For December Is Now Open
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(...) Not to mention that it's trivial to bypass it if you did want to use a bot. If we need to do bot protection, we can use a captcha (similar to the way we're protecting the full installer) when votes are actually submitted. But there's no reason (...) (20 years ago, 6-Dec-05, to lugnet.cad.dev.org.ldraw)
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| | Re: Allan Bedford "Unofficial LEGO builder's guide"
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Hello Geoffrey, (...) I'm not sure of the availability of the book via Shop At Home in Australia. I know it's there for the U.S. and Canada, but I can't confirm beyond that. However, I did a couple searches this morning and found several online book (...) (20 years ago, 6-Dec-05, to lugnet.books, lugnet.market.shopping)
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| | Re: idea per sito
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(...) Secondo me il problema di questo meccanismo è doppiamente tecnico e "politico". Innanzitutto le immagini da dove le peschiamo? Per poterle pescare da un sito del tipo peeron o brickset bisognerebbe conoscere il meccanismo di pubblicazione (...) (20 years ago, 6-Dec-05, to lugnet.org.it.itlug)
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| | Hans Christian Anderson sculpture by Jeremiah VandeerMark
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Hey all, Just saw (URL) story linked on ILENN>. Jeremiah VanderMark has been chosen to create a large public sculpture of Hans Christian Anderson for a park in Greenville Michigan. Congratulations, Jeremiah. Do you have pictures posted of your (...) (20 years ago, 6-Dec-05, to lugnet.mediawatch, lugnet.build.sculpture, FTX)
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| | Re: Is it possible to use LDView as POV-Ray previewer?
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(...) Travis, You could orthogonalise the matrix before writing it out. It's relatively easy to make a routine that will find a 'best' rotation matrix that is perpendicular and very close to the original. That way you don't have to deal with the up, (...) (20 years ago, 6-Dec-05, to lugnet.cad.ray)
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| | idea per sito
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Mi è venuta un'idea per il nostro sito, è un po' complessa e spero di essere capace di spiegarla chiaramente.... Trovo molto comoda la funzione "Set list" di Lugnet esempio (URL) poi il try-to-build con peeron è semplicemente strepitosa... ...ma non (...) (20 years ago, 6-Dec-05, to lugnet.org.it.itlug)
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| | Re: Hang time in Tokyo
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(...) Thank you for these pictures. It's nice to see you visiting us all around the world :) In fact it was surprising to see you in japan a very few days (hours?) after the Portland LEGO store display! Do you have news from Kelly ? :D Didier (...) (20 years ago, 6-Dec-05, to lugnet.trains)
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