 | | Re: MPD spec
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(...) I think so, too. I see MPD files almost like ZIP files. I know that there are differences, like inside WinZip you can generally only view standalone files without unzipping them first. (The reason I reignited this thread was I wanted to make (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: Paths, explicit drive references, and the case of file names (Was: MPD spec)
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(...) why not just say any of the following (':', '/' and '\') can be used as a delimiter, and it doesn't matter which you use - it's up to the program to translate any of those to the correct one for the OS? (...) defenitly! :) Dan (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: Smoothing on part level using edge lines
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"Don Heyse" <dheyse@hotmail.spam....away.com> wrote in message news:H0FBpw.8Mv@lugnet.com... (...) The sbotaohe (smoothing based on the absence of hard edges) is definitely the way to do (near) perfect smoothing without radically changing the parts (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev)
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| | Re: Paths, explicit drive references, and the case of file names (Was: MPD spec)
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(...) I'd prefer we say that local/absolute references are allowed, but provide guidelines to show that relative paths are usually better - easier to manage, easier to share, etc. (...) Yes, yes, and I'm guessing yes. (...) I think you are correct - (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) Good question. Different programs have more (or less) success at handling this. L3Lab seems to have no trouble with it. LDLite usually does ok, but not always (unfortunately, I don't have an example). (...) There's no special syntax, the (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: Smoothing on part level using edge lines
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"Jacob Sparre Andersen" <sparre@nbi.dk> wrote in message news:3D4FC5B0.1010300@nbi.dk... (...) This doesn't have to be fixed because the visual effect wil be marginal in programs like ldraw.exe (that actually use optional lines for drawing) and it (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev)
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| | Re: MPD spec
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(...) Auggh! Hey, it's not too late -- there is no official BFC spec. Yet. :> Steve (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) Right. Any "MPD splitter" program should include code to check that filenames and paths are valid, and either report missing paths, or create them, or ask the user before creating them, or provide options (ie, command line parameters) to (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: Smoothing on part level using edge lines
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(...) Yes. (...) If there aren't optional lines, the inside curve won't render correctly, when someone uses a transparent color. Steve (22 years ago, 6-Aug-02, to lugnet.cad.dev)
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| | Re: Smoothing on part level using edge lines
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(...) I tend to agree with Jacob, but if the big space dish were transparent, optional lines on the concave surface could actually be seen when viewing them through the convex side. However, I fiddled with this once upon a time and I think it adds (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev)
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| | Re: Smoothing on part level using edge lines
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(...) > there are no optional lines. Shouldn't that be fixed at some point? (...) I disagree. No optional lines are needed on inside curves. Play well, Jacob (22 years ago, 6-Aug-02, to lugnet.cad.dev)
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| | Re: Smoothing on part level using edge lines
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If you check out the big space dish (3961.dat) you can see the optional line algorithm fails because there are no optional lines. In my opinion this part is good. There is no need to fix this part because it will only get larger and slows down some (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev)
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| | Re: MPD spec
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(...) MPD files should not be named ".ldr" (or ".dat")! Jacob (22 years ago, 6-Aug-02, to lugnet.cad.dev.org.ldraw, lugnet.cad.dev)
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| | Re: MPD spec
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(...) Done. Play well, Jacob (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Paths, explicit drive references, and the case of file names (Was: MPD spec)
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(...) I am not sure about explicit drive references. Actually, I think we should limit it to _relative_ paths. We should also decide on a preferred - or maybe even fixed - directory name delimiter. I suppose that it should be "\", even though Unix (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) I would even call it a bad thing to do. But then I have a habit of putting "FILE" meta-command in all my files, so maybe I should stop criticising and try to fix my own bad habits first. > It's very easy to overwrite the main file with if the (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) I have ldr files with up to 4 levels of nested sub files, and LDview, L3Lab, and MLCad all appear to render them fine. ROSCO (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) I don't know about the other parsers, but as far as LDView is concerned an LDraw file is an LDraw file is an LDraw file. It makes no distinctions between ldr files, dat files, and mpd files. If it sees a 0 FILE command, it starts its MPD (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) I don't know how ldglite and other parsers work, but I guess they don't create files with paths and all, but rather objects somewhere in RAM, with 'filenames' just as a property. But if you call the procedure SaveToFile(Path+FileName) to save (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) This is a very good question, and is even more important with the migration to a single filename suffix (.LDR). What happens when your type-1 line refers to a LDR that happens to be a multi-part dat? Cheers, - jsproat (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) Another thing I realised the other day is that in Australia, the opposite of clockwise is generally anti-clockwise rather than counter-clockwise, so the BFC CERTIFY should really be CW or ACW, but it's a bit late to worry about it now! ROSCO (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) FWIW both the ldlite and l3 parsers in ldglite are OK with paths in an MPD file. Just make sure the path in the 0 FILE line matches the path on the type 1 line that pulls in the subfile. If they don't match it reports that it can't find the (...) (22 years ago, 6-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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I was wondering, didn't see it discussed in the text, is it permitted / custom to have ldraw files in a mpd file reference other mpd files? If so is the first part in the file used or is there some naming convention pointing to the correctsubpart (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) Hmm. I don't remember if there was a lot of discussion about putting paths on the 0 FILE line. So I won't say for absolute sure that the program should allow them. I'd say any software that *thinks* it needs a directory, and crashes when it's (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) Err, the entry for MPD in the glossary: (URL) here: (URL) is a bad link. Could you update the glossary to point to the new spec? Don (22 years ago, 5-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) MPD Workshop cannot handle a reference to a non-existing directory, or rather, it does not create a folder if necessary. For example: (URL) line: 0 FILE s\41342s01.dat assumes that there already exists the folder 's\' in the target directory, (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) Good point. Should probably also add the following... - There shouldn't be multiple files with the same name. - paths are allowed, so are explicit drive references. But the capability should be use with restraint, since it can easily make it (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) One addition that might be useful for people using the spec is to explicitly state that other than the first file being the main one, there is no implicit order to the remaining files. This is implied by the existing spec, but not actually (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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Great! One question: I think I've seen some MPD files with the extension .dat and named exactly the same as its main model sub-file. IMHO, it's a risky thing to do. It's very easy to overwrite the main file with if the mpd is named the same. (It (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) I don't know if we ever agreed on it; I don't remember the discussion of it at all. But I included it in the page. (...) Oyez, oyez! Please read the new Multi-Part DAT (MPD) Language Extension specification at (URL). All comments, suggestions, (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: Smoothing on part level using edge lines
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(...) This is technically due to bad dat code, not the algorithm. That edge shouldn't contain optional lines. However, given that they used a smashed half-sphere, they had no control over the presense of type 5 lines along that edge. And it's the (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev)
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| | Re: MPD spec
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(...) Not at all. It seems like a very sensible thing to do. I presume that the update will include the "NOFILE" meta-command (if we ever got around to agree on it). Please announce it, when the copy is ready, so I can change my web pages to point (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: MPD spec
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(...) Jacob, Do you mind if I copy (and update) the information on your MPD page to www.ldraw.org/reference/specs? Steve (22 years ago, 5-Aug-02, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Smoothing on part level using edge lines
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When I was implementing smoothing on part level using optional lines, I discovered an artifact in the smoothing algorithm. You can see what I mean by looking at the 'Space Radar Dish' 3960.dat using LDView 1.95 or later with primitive substitution (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev)
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| | Re: Generating binaries of updated MPD tools
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Don Heyse wrote: > I was kinda hoping you'd do (...) :-) Be prepared to act as guinea-pig, once I get a cross compiler to work. ;-) Play well, Jacob (22 years ago, 5-Aug-02, to lugnet.cad.dev)
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| | Re: *** LDView Version 1.9.6 Released ***
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Looks stable. Perhaps you can use the smooth pattern suggestion to draw a pattern in the back buffer and use glCopyTexImage2D( ) to make a texture of it. Then replace the geometric pattern with a texture. This might speed things up considerably and (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev)
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| | Re: *** LDView Version 1.9.6 Released ***
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(...) I forgot to mention. I didn't miss your suggestion of redrawing polygon outlines smoothed for patterned polygons; I just haven't implemented it yet. It is on my to-do list: (URL) even on the top list, which is items I actually plan to (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev)
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| | Re: MPD File Specs
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In lugnet.cad.dev, Don Heyse writes: ... (...) Thanks, Don! (22 years ago, 5-Aug-02, to lugnet.cad.dev)
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| | Re: MPD File Specs
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(...) Heh, this should be it, but it isn't. (URL) a short version of the specs here. (URL) it leaves out the 0 NOFILE bit mentioned here. (URL) think if you search for NOFILE on lugnet you'll find the discussion on scope inside an MPD file, which (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev)
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| | MPD File Specs
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Could anybody point me to the file specs for mpd files? I know I've seen them, but now that I need them, I just can't find them. (Yes, I have looked (at least ten minutes) for the MPD specs in both lugnet and ldraw.org without finding it). TIA, (...) (22 years ago, 5-Aug-02, to lugnet.cad.dev)
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