 | | Mindfest
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Coming at you FROM the MINDFEST floor... Put it this way, Mindfest is a BLAST... More later. John Van Z will be demoing Lugnet and the CAD related stuff (LDraw format files, LDLite, L2P, running POVRay, Datsville and the Datsville explorer at 10 AM (...) (25 years ago, 23-Oct-99, to lugnet.general, lugnet.robotics.events, lugnet.cad.dev, lugnet.admin.general)
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| | HOSER problem
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This isn't urgent(I won't be able to do anything about it until Sun. or Mon.), but I'd appreciate it if anyone could help me out here. I have been working with Hoser a lot lately, but tonight I am having a problem. I am trying to get 282, -7.8, (...) (25 years ago, 23-Oct-99, to lugnet.cad.dev)
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| | Re: Line in the Sand
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(...) Good catch. I've been wondering how to describe/differentiate the "calling point" or "current environment" idea. I'll put your update in the doc. Steve "Never trust anything that can think for itself, if you can't see where it keeps its (...) (25 years ago, 22-Oct-99, to lugnet.cad.dev)
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| | Planned downtime for ldraw.org
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www.ldraw.org and hugin.ldraw.org will be off-line for 10-15 minutes Monday 25th of October. It will happen sometime between 06 and 16 UTC, when the machine is moved to another location (just next door). Play well, Jacob ---...--- -- E-mail: (...) (25 years ago, 22-Oct-99, to lugnet.cad.dev.org.ldraw)
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| | Re: Line in the Sand
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Steve: (...) Good work. I have one comment/clarification/question: (...) has disabled clipping at the "calling point" for this subfile. The current wording _could_ be interpreted as "somewhere in the file". Play well, Jacob ---...--- -- E-mail: (...) (25 years ago, 22-Oct-99, to lugnet.cad.dev)
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| | Whither Terry Keller?
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Hey all, Does anyone know Terry's status? Is he on vacation, caught up in Real World issues, is he okay? Cheers, - jsproat [f-ups set to lugnet.people -- posted off-topic in .cad.dev to catch attention which I know I'll get flack for...] (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Line in the Sand
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(...) Much better than I used to be. Steve "Never trust anything that can think for itself, if you can't see where it keeps its brain." (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Line in the Sand
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On Thu, 21 Oct 1999 01:07:30 GMT, "Gary Williams" <graywolf@pcpros.net> wrote: [clipped good stuff] (...) You are making sense, it is a valid issue, I've been missing the boat on inversion for awhile now, and I'll update the document. Should there (...) (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Line in the Sand
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(...) Sometimes, life just sucks. ;) Have a great weekend! (...) OK. (...) Both of these. (0 CERTIFY with no tags would be a syntax error, IMO.) (...) Define necessary. ;) CERTIFY is not absolutely required, but it is logical and useful. The other (...) (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Line in the Sand
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The proposal has been updated, with changes from Lars and Gary, some additional definitions, and a new section of parts guidelines. See it at (URL). The revision marks (along the left margin) will be maintained until we've got a final document, (...) (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Line in the Sand
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(...) Yes. How are you on travel? :-) (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Several replies to CLIPPING / WINDING
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(...) Sorry, you are right here. I allways think in some form of winding (CW or CCW) so this one slipped me, once again sorry, you are right. Can't assume nothing. (...) what I said was relative to my way of thinking, without the previous sentence, (...) (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Line in the Sand
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(...) Thanks. (blushing) Can that be translated into paying work? (...) That's because it's written by someone who keeps the matrix-math reference material very close at hand whenever he's got to actually go under the hood. (...) Issue 1: should the (...) (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Object Orientation & DAT files & CLIPPING/WINDING
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(...) You are right. Or more precisely, I was wrong. Matrix-based *inversions* are not required. But matrix-based mirrorings will be necessary, for asymmetric primitives, like 1-4cyls.dat. (...) I was thinking about some approach that would map (...) (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Line in the Sand
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Gary Williams wrote in message ... (...) a (...) Well, what I meant to say is: Matrices with negative determinants may be used for mirroring a part, BUT the matrix should never be assumed to perform the actual inversion. If a matrix has a negative (...) (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Line in the Sand
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Steve Bliss wrote in message <380e2b8e.12563517@l...et.com>... (...) An orientation matrix doesn't contain enough information to invert an asymmetrical part; if you assume it does, this would result in a part with a mirrored shape. I propose that (...) (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Line in the Sand
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Steve Bliss wrote... (...) Good idea, it's hard to discuss in so many threads. (...) Thank you for the well-written summary. Well-written because I agree with 99% of it ;) (...) Yes, too bad I'm off for an Internet-free :( 4-day week-end at the sea (...) (25 years ago, 21-Oct-99, to lugnet.cad.dev)
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| | Re: Line in the Sand
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(...) I would. This is WAY better than most of the crap requirements I have to rationalize into some semblance of something to keep paying customers happy. Very nice work, Steve. Written in a way that made it understandable to someone that doesn't (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
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| | Re: Object Orientation & DAT files & CLIPPING/WINDING [DAT]
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Steve Bliss wrote... (...) "Hey, (...) But it *is* compatible with LDraw! You left out my example (which BTW had the INVERT placed incorrectly :-), so I'll repeat it. stud2.dat is the hollow stud used on technic bricks. It uses two cylinders: 1 16 0 (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
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| | Line in the Sand
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OK, we've been discussing how to best extend the LDraw language to allow rendering engines to do backface-culling. We've got a pretty good agreement on most of what is needed. I think it would be productive, at this point, to work from a complete (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
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