 | | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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Steve Bliss wrote in message <37f4edd7.8510607@lu...et.com>... (...) are (...) rotated (...) thinking. (...) Possibly. I'm not to great when it comes to expressing myself. I think if an even number of mirror operations are performed on a part, its (...) (25 years ago, 3-Oct-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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(...) OIC now. I think. If an asymmetrical part is mirrored, it keeps the same shape, but is turned inside out. To get it right-side-out again, it must be re-mirrored. In other words, there's no way to produce left- and right-handed pairs of (...) (25 years ago, 3-Oct-99, to lugnet.cad.dev)
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| | Re: CW/CCW, vertex sequence, co-planar, convex, (115kB)
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(...) Jacob: (...) Why? Having a negative determinate *should* turn subfiles inside-out. IMO. That's a useful function. Having programs checking determinates is not useful, and wastes rendering time. Steve (25 years ago, 3-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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(...) We're it. So to speak. Steve (25 years ago, 3-Oct-99, to lugnet.cad.dev)
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| | Re: Hidden surface removal, and vertex order in part/primitive DAT files [DAT]
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(...) 578 is compliant because it contains *only* subfile references, which have been verified to not mess up (C)CW-ness. But that doesn't mean the *subfiles* are compliant. It also assumes the compliant subfiles are oriented the way the author (me) (...) (25 years ago, 3-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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Steve Bliss wrote in message <37f6c0d9.269680202@...et.com>... (...) Doh, you posted mere minutes before me and said the same thing. :) -Gary (25 years ago, 3-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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Jean-Pierre PARIS wrote in message <37F660FB.1EC77AC9@w...doo.fr>... (...) I see where you're coming from now. You're right. (...) could (...) It's starting to sound like user intervention would be needed in most, if not all, cases. Maybe it would (...) (25 years ago, 3-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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(...) This isn't automatic, but what if the program interrogates the user to pick a side which is facing outward? From that information, the program could then mark-up all adjacent sides. If the program ran out of sides, it could re-interrogate for (...) (25 years ago, 3-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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Jacob Sparre Andersen wrote in message ... (...) That works for me. I don't suppose there's an official standards-setting body of people charged with voting on extensions to the .dat format, is there? Maybe it's time to form one. -Gary (25 years ago, 2-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, but I think that the even/odd algorithm only work on 'correct' solids. For example, if you take a 'bad' box made of 6 faces that have holes beween them, your algorithm can lit an inside face. And in some parts, such a situation exists. (...) (25 years ago, 2-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: (...) I still think using 0 FACE ( CW | CCW | DOUBLE-SIDED | UNKNOWN ) is most practical. Play well, Jacob ---...--- -- E-mail: sparre@cats.nbi.dk -- -- Web...: <URL:(URL) -- ---...--- (25 years ago, 2-Oct-99, to lugnet.cad.dev)
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| | Re: POV --> JPG,GIF
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(...) Mine save to .bmp files - which you can open in Windows Paint. Same thing, Paint Shop Pro works... I prefer to run with the pros and get Photoshop :) -Tim <>< (URL) timcourtne ICQ: 23951114 How to rob a bank in ancient Rome: "Catapultam habeo. (...) (25 years ago, 2-Oct-99, to lugnet.cad.dev)
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| | Re: POV --> JPG,GIF
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(...) Hrmmm... doesn't POV save it as a TGA file? Just find something that will convert those files to JPG. Paint Shop Pro comes to mind: (URL) looks like I need to upgrade - they're up to version 6. (25 years ago, 2-Oct-99, to lugnet.cad.dev)
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| | POV --> JPG,GIF
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Heya ! How can I convert a POV file to JPG or GIF file ? Thanx ! Rene e-mail: virsik@sco.svf.stuba.sk (25 years ago, 2-Oct-99, to lugnet.cad.dev)
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| | Re: New Group Idea
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(...) Ahem, I think the point of Todd calling a clones group 'Evil' was to say 'Keep LDraw pure, we don't need any of that imitation garbage.' :) -Tim <>< (URL) timcourtne ICQ: 23951114 How to rob a bank in ancient Rome: "Catapultam habeo. Nisi (...) (25 years ago, 2-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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Michael Lachmann wrote in message ... (...) I retract my earlier suggestion. I'd prefer to test for '0 CW-compliant' than '0 CW*' because checking for an exact string match is usually easier. Not supporting wildcards also promotes consistency. (...) (25 years ago, 2-Oct-99, to lugnet.cad.dev)
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| | Re: MI/X (Was: LeoCAD for Linux (Was: Compiling MPD Builder/Splitter for DOS/Win?))
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[ FUT lugnet.off-topic.geek ] Doc: (...) I don't get as far as connecting to _any_ Linux machine. (...) Where can I pick that up? Play well, Jacob ---...--- -- E-mail: sparre@cats.nbi.dk -- -- Web...: <URL:(URL) -- ---...--- (25 years ago, 2-Oct-99, to lugnet.off-topic.geek, lugnet.cad, lugnet.cad.dev)
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| | Re: New Group Idea
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(...) Alright then, I'll submit my planned .DAT files of Byggis door and windows and my Tyco phone to lugnet.dat.cad.parts. B-) /Tore (25 years ago, 2-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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What if say a complient file contains anything starting with "0 CW". Any program dealing with this information could just scan for "0 CW*". We also could use a tag "0 AW*" if why ever the orientation is not clock-wice but anti-clockwice .... I think (...) (25 years ago, 2-Oct-99, to lugnet.cad.dev)
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| | Re: New Group Idea
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(...) Ditto. -Tim <>< (URL) timcourtne ICQ: 23951114 How to rob a bank in ancient Rome: "Catapultam habeo. Nisi pecuniam omnem mihi dabis, ad caput tuum saxum immane mittam." (I have a catapult. Give me all the money, or I will fling an enormous (...) (25 years ago, 2-Oct-99, to lugnet.cad.dev)
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