 | | Re: Call for Nominations: 2005 LDraw.org Steering Committee
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(...) Since they've done a decent job (IMO), I'd like to re-nominate the current members, including... Orion Pobursky -gyug (20 years ago, 6-Jan-05, to lugnet.cad.dev.org.ldraw, FTX)
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| | Re: Call for Nominations: 2005 LDraw.org Steering Committee
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(...) Since they've done a decent job (IMO), I'd like to re-nominate the current members, starting with Tim Courtney. (20 years ago, 6-Jan-05, to lugnet.cad.dev.org.ldraw, FTX)
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| | Re: Mathematical assistance please
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(...) Ooooops, I see now I was totally barking up the wrong tree, you need to WORK OUT the alpha angle, sorry. But transforming the co-ordinate system should still work. ROSCO (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) Or maybe another way to look at it (got this from old lecture notes): Goal: rotate about arbitrary vector A by alpha Idea: we know how to rotate about X,Y,Z So, rotate about Y by beta until A lies in the YZ plane Then rotate about X by gamma (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Call for Nominations: 2005 LDraw.org Steering Committee
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Per the LDraw.org Bylaws, Subsection 6.03(a), the 2004 Steering Committee hereby calls for the community to nominate individuals as candidates for the 2005 Steering Committee. Please post nominations in response to this message. Nominations will be (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev.org.ldraw, FTX) !!
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| | Re: Mathematical assistance please
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(...) Could you transform the co-ordinate system so that one of it's axes is along the centre-line of the 4-4cyls (in the plane S0-S1-S2), rotate it about that axis so that the longest sise is in the plane, then transform the co-ord system back? (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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In lugnet.cad.dev, Ross Crawford wrote: <snip> (...) know how to come up with the rotation angle needed to twist the 4-4cyls.dat into the right position. One reason to push forward on my original solution is because the same knowledge can be used to (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) Hi Roscoe, Thanks for the help. If you extend the cylinders so that the outside edges touch, you will be able to see the overlap.... at small angles, this works because the overlap is small, but at larger angles, the overlap is noticable. I (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) It's hard work, but this page might help (URL) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) Hi Philo, Good to hear from you. My mistake.... I am using 4-4cyls.dat. rotating them to align them with the S0-S1-S2 plane is what I don't know how to do. Thanks, Kevin (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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