 | | Re: Hidden surface removal, and vertex order in part/primitive DAT files
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(...) I choose rays so that they may orient one face. With this face I use a sort of flood-fill algorithm (please try to find on of my previuos message) to orient al neighbors. Once a face is oriented, I don't look at it anymore. But, your idea (...) (25 years ago, 5-Oct-99, to lugnet.cad.dev)
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| | Re: Hidden surface removal, and vertex order in part/primitive DAT files
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(...) Sorry Leonardo, but I checked 105 again my code: it does the right job! Ok, you can argue it's pure luck. In fact, it is! If a ray went through the hole between the flag and the rest of the piece, my code would invert the flag orientation. (...) (25 years ago, 5-Oct-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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Steve Bliss wrote in message <37f9f5c6.74291430@l...et.com>... (...) not (...) inversion. (...) For WizardCAD I was intending to change the behavior of the mirror functions depending on what type of file the user opened the file as. If they open a (...) (25 years ago, 5-Oct-99, to lugnet.cad.dev)
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| | Re: Track names (was Re: To Tore Eriksson)
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(...) Don´t bother to dig the set up. Tore found an instuction scan at (URL) it clearly shows that the track parts from this set also have slots in them. Greetings, Manfred Moolhuysen. (25 years ago, 5-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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(...) The last three parameters define a vector, not angles. The nested commands are rotated <angle> degrees around the vector. To rotate 45 degrees around X, do: 0 ROTATE 45 1 0 0 ... To rotate -45 degress around Y, you can do this: 0 ROTATE 45 0 (...) (25 years ago, 5-Oct-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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(...) True. But mirroring is an advanced technique. Well, maybe intermediate-level. Anyway, it's not for beginners. (...) True. Allowing mirroring/inversion for parts authors allows them to use a single set of primitives, while keeping part-files (...) (25 years ago, 5-Oct-99, to lugnet.cad.dev)
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| | Re: Track names (was Re: To Tore Eriksson)
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(...) You could not find it with that loose and sloppy description! :-) (URL) Sorry about that! (...) You're right, slots are a better name than notches for the openings. However I would say that "tabs" are a better name for the part on the sleeper (...) (25 years ago, 5-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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I've got a zillion bug reports about mpds to sort through. Hopefully it will handle them better than 1.6 :). -gyug (...) (25 years ago, 5-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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(...) Great! Out of curiousity, how well does the upcoming version of LDlite (1.7 isn't it?) handle MPDs? --Bram Bram Lambrecht / o o \ BramL@juno.com ---...---oooo-----(_...o---...--- WWW: (URL) (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Signed up for MindFest
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I'm so happy! I have to post this list. From the online LEGO community, we have some great representation signed up for MindFest at MIT. Names marked with a (*) are guest speakers. NELUG will have an exhibit table and a welcoming evening. LDraw (...) (25 years ago, 4-Oct-99, to lugnet.robotics.events, lugnet.loc.us.ma.bos, lugnet.announce, lugnet.cad.dev.org.ldraw)
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| | Re: Interpreting the proposed FACE meta-command
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Steve Bliss wrote in message <37f8c4a9.238320530@...et.com>... (...) Well, I have nothing against anticlockwise, but it's redundant. Seeing ACW where one expects CW or CCW may confuse some people. I checked the dictionary because I honestly didn't (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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Paul Gyugyi: [ kind of announced the next LDLite version ] Cool. Jacob (who should try to get LDLite to run on Linux) ---...--- -- E-mail: sparre@cats.nbi.dk -- -- Web...: <URL:(URL) -- ---...--- (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Re: Track names (was Re: To Tore Eriksson)
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(...) 4555? (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex
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John VanZwieten wrote in message ... (...) Actually, I count three ideas. (...) messy. (...) when (...) the (...) to (...) only (...) have (...) in (...) CW (...) slightly (...) for (...) The third option, which I believe would be best, is similar (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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Steve Bliss wrote in message <37f8c86b.239282689@...et.com>... (...) But more often than not, when mirroring an element or subassembly, it's not the intent of the author to turn it inside out. Typical model builders shouldn't concern themselves (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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Paul Gyugyi wrote in message <37F8CE0C.13D582C9@g...yi.com>... (...) Cool! This could be very handy. I'll add it to the DAT format page I'm writing. -Gary (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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Lars C. Hassing wrote in message <939050465.592693@ns.cci.dk>... (...) True. But when manually examining a file, if you come across a 0 INVERT you wouldn't know whether this was the beginning or the end of the inverted references, without a bit of (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex [DAT]
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It seems to me that there are two major "camps" in the CW/CCW debate. A. Face-by-Face Method This method suggests that CW-ness be ultimately evaluated on a face-by-face basis. Each quad in a primitive or part would hold a value of CW,CCW, or (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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(...) True. '0 INVERT END' may be allowed as a syntactic convenience to authors. Or 0 INVERT could be rewritten as 0 INVERT [ON|OFF|TOGGLE] where TOGGLE would be the default action. (...) [example snipped] 0 INVERT is different from 0 FACE [CW|CCW] (...) (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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| | Re: Comprehensive meta-command list
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(...) Hooray! :) (...) Hooray! :) Steve (25 years ago, 4-Oct-99, to lugnet.cad.dev)
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