 | | Re: Hidden surface removal, and vertex order in part/primitive DAT files
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Michael Lachmann: (...) I think we agreed to use 0 CW and 0 CCW lines in the beginning of the files to indicate (C)CW compliancy, but you should have a look at what Steve actually has written in his parts. (...) It would be very nice if you (...) (25 years ago, 1-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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You mentioned that some parts have a "0 CW-Compliant" tag. Could we do something to make this a standard? Because than I could read this tag in MLCad and make the drawing faster!!!!! Tell me what you think! Mike (...) John VanZwieten wrote in (...) (25 years ago, 1-Oct-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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(...) MAX2DAT isn't really meant to be a comprehensive part authoring tool... it's easy to build simple objects (like a 2x2 tile or 1x1 round plate) directly in LEdit with primatives... but objects like complex technic pieces, wheels, etc often have (...) (25 years ago, 1-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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Gary Williams wrote in message ... (...) Okay, I made a bad assumption there, since a group of polygons may terminate flush against another polygon, without touching its edges. But still I think a performance improvement could be realized by using (...) (25 years ago, 30-Sep-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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Jean-Pierre PARIS wrote in message <37F3B871.74AE196F@w...doo.fr>... (...) My algorithm doesn't require the vertices to exactly match; I was intending to pass one ray per polygon through the dat object, not an arbitrarily large number. And only if (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | Re: *** PANEL 2409 ***
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(...) Ok, but I'm 95% sure that's where I grabbed the copy for ldraw.org originally.. :) Downloading now... -Tim Courtney ldraw.org Project Coordinator (URL) timcourtne ICQ: 23951114 (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | Re: *** PANEL 2409 ***
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(...) I'm almost positive that the ldraw.exe at: (URL) include those updates, so Tim, please grab a copy. --Bram Bram Lambrecht / o o \ BramL@juno.com ---...---oooo-----(_...o---...--- WWW: (URL) (25 years ago, 30-Sep-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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Hello, Ok guys, I already announced that I coded such a tool in Java. At present, only one Ldrawer has asked for the code. In fact, it's an alpha release. Thus, I should find beta testers first. Anyway it has already translated some pieces! Here is (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | Re: To Tore Eriksson
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(...) They could also be differentiated simply by appending Type 1 and Type 2 to the name. Steve (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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John VanZwieten wrote in message ... (...) primitive (...) the (...) ray (...) A hypothetical batch dat fixer program could examine the primitives first and flag the ones that were not closed volumes, since those would be the only ones that would (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | Re: LeoCAD for Linux (Was: Compiling MPD Builder/Splitter for DOS/Win?)
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Leonardo: [ LeoCAD for Linux can be found at (URL) ] I downloaded and installed it. Some problems: - I had to compile Mesa with the command make linux-386-elf (not "linux-shared-elf" as you write on the web site). - Gtk+-1.2 is neccesary. - LeoCAD (...) (25 years ago, 30-Sep-99, to lugnet.cad, lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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Gary Williams <graywolf@pcpros.net> wrote in message news:FIvo77.F2B@lugnet.com... (...) In the case I'm talking about, 1 primitive is used in 1 instance to be both an outer face and an inner face. In this case, you'd have to fix it manually by (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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(...) I was curious, how do you add a stud to a part if you're using MAX2DAT ? Can it be done in 3DS or you have to edit the part later ? I thought that we've agreed that the new parts would have to pass L3P tests for coincident verts and bow-ties, (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | Re: *** PANEL 2409 ***
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On my system, 2409.dat is dated June 23, 1997. Which would put it in the right range for being in James Jessiman's final part-update, LP97-14. I'm not seeing this on www.ldraw.org (I didn't look *that* hard), but you can get it from James' website, (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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(...) When you draw a part with a pattern transparently, I guess it's not a good idea to remove the backfaces or you might not see the pattern from some angles. (...) About that discussion, IMO it would be better to have *everything* CCW instead of (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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(...) It wouldn't be impossible to fix primitive usage so that primitives such as 4-4cyli.dat are always applied as infinitely thin 1-sided objects. Would that solve the problem? (...) I don't think re-engineering the library is impossible. (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | Re: LeoCAD for Linux (Was: Compiling MPD Builder/Splitter for DOS/Win?)
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(...) (URL) (25 years ago, 30-Sep-99, to lugnet.cad, lugnet.cad.dev)
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| | Re: To Tore Eriksson
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Thanks Tore, Sorry, I've missed your second announcement,I'v been off the list myself during that time. Thank you for your reaction despite that you have those issues on yor hand. O.K, it's a deal, I'll do the update and submission of part 3228 for (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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John VanZwieten wrote in message ... (...) the (...) in (...) What if the part that referenced such a primitive had a '0 invert' comment on the line before the primitive reference, if that instance of the primitive was intended to appear inside-out? (...) (25 years ago, 30-Sep-99, to lugnet.cad.dev)
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| | LeoCAD for Linux (Was: Compiling MPD Builder/Splitter for DOS/Win?)
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[ XFUT lugnet.cad ] Leonardo Zide: (...) URL! URL! (they yelled) Play well, Jacob ---...--- -- E-mail: sparre@cats.nbi.dk -- -- Web...: <URL:(URL) -- ---...--- (25 years ago, 30-Sep-99, to lugnet.cad.dev, lugnet.cad)
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