 | | Re: Is the LDraw parts database free?
|
|
Fredrik Glöckner skrev i meddelandet ... (...) This question has been on my mind too a bit, as I have thought of the possibility to 'import' LDRAW parts to BlockCAD (with a lot of manual massaging of course, but still using the work done on the (...) (25 years ago, 16-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Is the LDraw parts database free?
|
|
(...) You forgot that there's a DOS emulator for Unix and you don't need to run the .EXE files, they are ARJ self extracting archives so running "arj x file.exe" will extract the files as well (and arj can be easily found for Linux systems, it's (...) (25 years ago, 16-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) I forgot to add that you can have a file that is 'certified', but due to its nature (the lego part/sub-part) no clipping is applicable, but it can have correct point order (no bowties) and a defined winding (the default, or some expecifically (...) (25 years ago, 16-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Actually, I was thinking of CERTIFY, like a enable of the specific new metacommands. Example: If you have a 0 CERTIFY BFC would mean Enable or take into account the GFC related commands. besides the fact that it certifies that file has beeing (...) (25 years ago, 16-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Problems with Ldraw related sites
|
|
Manfred: (...) [...] It is my fault. I tried to optimise the web server, and forgot to check if everything worked after the change. It should have been fixed now. Play well, Jacob ---...--- -- E-mail: sparre@cats.nbi.dk -- -- Web...: <URL:(URL) -- (...) (25 years ago, 16-Nov-99, to lugnet.cad.dev.org.ldraw)
|
| |
| | Problems with Ldraw related sites
|
|
Hello all, Somehow I can't get into www.ldraw.org anymore. when I try I recieve an error message like: Forbidden You don't have permission to access /contact.html on this server. When I use the link from the lugnet.cad.dev.org.ldraw newsgroup page, (...) (25 years ago, 16-Nov-99, to lugnet.cad.dev.org.ldraw)
|
| |
| | Is the LDraw parts database free?
|
|
I know that the LDraw software remains the intellectual property of James Jessiman's immediate family. But what about the parts (primitives, parts) database as a whole? Is it the property of James Jessiman's immediate family as well? Or is it free (...) (25 years ago, 16-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Steve Bliss wrote in message ... (...) I think it is nice to have the winding state expressed explicitly. IMO part authors should be allowed to whatever winding they find most natural to work with (though you say CCW is desirable). It is perfectly (...) (25 years ago, 15-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) 0 WINDING (CW|CCW) as the 'certify statement', rather than 0 CLIPPING ON ? Winding is local. Certification is sort-of local -- only the local file is certified, but the local setting affects whether subfiles (in the same reference branch) are (...) (25 years ago, 15-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) Argh. You are correct, sir. Serves me right, trying to post quickly. Here's a correction: (...) Steve (25 years ago, 15-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Steve Bliss wrote in message ... (...) No, WINDING is local! It does not affect subfiles, this is the very reason why we have invented the CLIPPING command. /Lars (25 years ago, 15-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Oops! Forget a few important details in the psuedo-code! (...) The last line above should be: (AccumClip and LocalClip and (Winding != UNKNOWN) and Certified), (...) And the line above should be: If AccumClip and LocalClip And Certified Then (...) (25 years ago, 15-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Steve Bliss wrote... (...) But it's not used! (...) But it's not used! (...) But it's not used! Why would future extensions use the CERTIFY statement if we don't have a use for it today? I agree WINDING may not directly make you think about BFC, but (...) (25 years ago, 14-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Steve Bliss wrote ... (...) I think your pseudo-code delivers a fine evidence why the CERTIFY is unnecessary ;-) /Lars (25 years ago, 13-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
[ Still discussing (URL) ] Steve: (...) You=anyone (kind of - English is a very imprecise language - "on" in French, "man" in Danish, ...) (...) That depends on how the program is written. You could imagine that the variable "local_clipping" isn't (...) (25 years ago, 13-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Steve: (...) I _don't_ think CERTIFY should be dropped, but we might want to change it to "EXTENSIONS", since it is intended for listing which extensions to the LDraw language the file contains. (...) Yes. Play well, Jacob ---...--- -- E-mail: (...) (25 years ago, 13-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) Did you mean you=Steve or you=anyone? (...) I agree, the sequence should be illegal. My point was, does CERTIFY BFC change the value of the internal local_clipping variable, or not? My intention was that it does not. From a practical (...) (25 years ago, 12-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) I'd like to hear from other people about this before deciding to keep it or drop it. I'll give my reasons to keep CERTIFY below. But first ... (...) Why not use: 0 CLIPPING (YES|NO) CLIPPING addresses the core issue (can the current file be (...) (25 years ago, 12-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) OK, I'll change this in the document. Changes from the last few days will be uploaded to GeoCities in the next hour or so. Steve (25 years ago, 12-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Steve: (...) [...] (...) ...with the inversion status. (...) Yes. You might want to change "INVERT" to "INVERTNEXT". Play well, Jacob ---...--- -- E-mail: sparre@cats.nbi.dk -- -- Web...: <URL:(URL) -- ---...--- (25 years ago, 11-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
[ Still discussing (URL) ] Steve: (...) [...] (...) "INVERTNEXT" is good. It makes the effect much more clear. (...) It gets much too messy when you mix the states of a parameter and the setting of that parameter. CERTIFY BFC does imply CLIPPING ON, (...) (25 years ago, 11-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
I think we should drop the CERTIFY as it is superfluous and apparently adds more confusion than it clarifies! Why not settle for: 0 WINDING (CCW|CW|UNKNOWN) This defines the winding of the following polygons and means that the file is "certified", (...) (25 years ago, 11-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Steve Bliss wrote... (...) But it *does* imply CLIPPING ON. Otherwise clipping would be off. Remember, CLIPPING ON cannot turn clipping on if turned off in a superfile. If you render the part alone (just to view the single part) the CERTIFY should (...) (25 years ago, 10-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) I don't think I understand you here. Do you mean that it is strange to let the user and/or programmer of the rendering program set the initial CLIPPING value? [clipped nice rendering-process tree] (...) It's not too complicated. A rendering (...) (25 years ago, 10-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
See (URL) There is a serious weakness in this document, 'certification' is not clearly defined. This definitely needs to be addressed. Currently, the only definition of certification is: (...) ... which is a bit of a typo. My definition of certified (...) (25 years ago, 10-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand [DAT]
|
|
On Wed, 10 Nov 1999 00:44:17 GMT, "Lars C. Hassing" <lch@ccieurope.com> wrote: Still discussing (URL) (...) Yes, but the 0 CERTIFY ( BFC | NOBFC ) format is more common. And it emphasizes that is one statement with various parameters. And it's less (...) (25 years ago, 10-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) In our case, it makes sense to make a single trip to the store for ingredients (primitives). Once we've got the ingredients on-hand, we can start baking the cakes. Steve No, this didn't really add to the discussion. I just liked the analogy. (25 years ago, 10-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) ---...--- (...) Don't take this so personally, it's not worth it. I am only trying to contribute to a worthy cause (LEGO). Everyone can have different opinions. I don't need to jump on the other guys traught. Anyway, I apologise if I have (...) (25 years ago, 10-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand [DAT]
|
|
(...) Strange sentence, CLIPPING is OFF by default, you can change that by including a CLIPPING ON. And this was not what was beeing discussed. See below. (...) Look at this two trees root root C N / \ / \ C N C N /| |\ /| |\ C N C N C N C N 1 2 3 4 (...) (25 years ago, 10-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Steve: (...) Yes. (...) The argument against should be that it complicates the rendering significantly, but I don't think it does. Play well, Jacob ---...--- -- E-mail: sparre@cats.nbi.dk -- -- Web...: <URL:(URL) -- ---...--- (25 years ago, 10-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Steve Bliss wrote... (...) the (...) allow (...) OFF (...) they (...) reference (...) CLIPPING (...) Good point! (...) Or you could write: 0 CERTIFY BFC | 0 CERTIFY NOBFC 0 WINDING CW | 0 WINDING CCW | 0 WINDING UNKNOWN (I don't think "0 WINDING" (...) (25 years ago, 10-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) I'll make these changes. I think all your points have been discussed in follow-up messages, so I'll make my responses (if there are any) to those later messages. Steve (25 years ago, 9-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) As Jacob said, this is why the specification suggests that rendering programs allow the user to select the option of defaulting CLIPPING to on or off. (...) Huh? In that case, the uncertified primitive is not back-face-culled, but the (...) (25 years ago, 9-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) Yes. WINDING UNKNOWN allows a DAT author to specify what is happening in the file more precisely than CLIPPING OFF. Adding WINDING DOUBLE-SIDED would allow even more author-precision, but there is no practical difference between DOUBLE-SIDED (...) (25 years ago, 9-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) You'll pardon me if I use an abbreviated notation, and skip the " characters. (...) It's hard to argue with that. Steve (25 years ago, 9-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) Yes, and 'may' is more more correct than 'should', since the "Rendering Engine Requirements" section really is included just to provide a framework for the language extensions. The document specifies the input, and we have a general (...) (25 years ago, 9-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Update 9906?
|
|
(...) Not too many all at once! At least on the first go-round. After that, the more, the merrier! :) (...) Yay, Terry! (...) Terry has sent me a copy of everything he has received, post 99-06. He is also going to forward future mail to me. New part (...) (25 years ago, 9-Nov-99, to lugnet.cad.dev)
|
| |
| | Problem with the LDraw Parts Tracker
|
|
Hello all, Boys and girs, I'm having a problem with the LDraw Parts Tracker. The link towards the "Tracked Parts" page still works, although only the text part of the page comes up. I don't get the seegreen background I've been used to see there (...) (25 years ago, 9-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
[ Still discussing (URL) ] Rui: (...) Yes, but generally it is no big deal to certify a model file - and there is the suggested option for the renderers mentioned further down for the lazy. (...) Yes, but we aren't all that stupid. We will of cause (...) (25 years ago, 9-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Update 9906?
|
|
Great news to see things moving again - many thanks, Steve. A great motivation for me to get those parts off the "drawing board" and into DAT files. Many, many thanks are due to Terry for all his hard work, adjudication and perseverance in the past. (...) (25 years ago, 9-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Update 9906?
|
|
(...) Ditto. This message is x-posted to lugnet.cad.dev. (...) Terry plans on finishing things up for 99-06. I'll start with 99-07. Well, it might be the 2000-01 update, if there isn't enough of 1999 left to go around. (...) I was waiting for 9906 (...) (25 years ago, 9-Nov-99, to lugnet.cad, lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) Agreed, it's logical. Should is too strong ! not like must, but strong anyway. (...) of course, but all files start on one root, if that is no BFC certified, than no acceleration. (...) but a certified part can have sub parts not certified ! (...) (25 years ago, 8-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Update 9906?
|
|
[ XFUT lugnet.cad ] Adam Howard asked when the next parts update will show up. Terry has been much too busy lately, to work on the parts update (or play with LEGO for that matter), so he has handed the task of preparing the parts updates over to (...) (25 years ago, 7-Nov-99, to lugnet.cad.dev, lugnet.cad)
|
| |
| | Re: Update 9906?
|
|
(...) Terry (the person who takes care of the voting) said that he was going on vacation in August and we haven't heard from him since. Leonardo (25 years ago, 7-Nov-99, to lugnet.cad.dev)
|
| |
| | Update 9906?
|
|
Hi! When is the next parts update going to be posted for official download? ldraw.org and the mirror site show 9905 as the last official update. Voting for 9906 was completed in August wasn't it? Just curious...not impatient. Thanks, Adam (25 years ago, 7-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Steve: I have a small linguistic correction, but except for that, I consider the document finished: There will be a few requirements placed on the design of rendering programs, in order to achieve correct renderings. Any program should may violate (...) (25 years ago, 6-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) As I said it is not ready iet. The questions (options) that where up in the air, are still there, no one as discussed them, after this spec file was created. I don't have much time now, but here are several problems. Examples: check the (...) (25 years ago, 5-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
Steve: (...) I think it is ready, but I will print out a copy, and check it tonight. Play well, Jacob ---...--- -- E-mail: sparre@cats.nbi.dk -- -- Web...: <URL:(URL) -- ---...--- (25 years ago, 5-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) I haven't had time to reply, hope to have soon. (...) NO ! It's not quite done iet ! 8) (...) Rui Martins (25 years ago, 5-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: Line in the Sand
|
|
(...) There hasn't been any discussion on this in almost two weeks. Does everyone like this spec? Any issues? Are you programmers willing to implement this? Is it ready to go to press? Steve (25 years ago, 4-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: DAT to DXF
|
|
Jaco van der Molen (Sjaacko) wrote ... (...) (URL) lacks a link to 3DWin: (URL) (25 years ago, 4-Nov-99, to lugnet.cad.dev)
|
| |
| | DAT to DXF
|
|
Hi all, I know it is out there: DAT to DXF... but where? Can anyone point the URL out for me? Tnx. -- Greetingz... Sjaacko (25 years ago, 4-Nov-99, to lugnet.cad.dev)
|
| |
| | Re: My first DAT file!
|
|
(...) See my second model... posted to lugnet.cad.dat.models You may have to cut-n-paste the model out and look at it in MLCad though as LDLite gets stuck close to the end. I would really like to know what the issue is there... it makes me loath to (...) (25 years ago, 2-Nov-99, to lugnet.cad, lugnet.cad.dev)
|
| |
| | Re: My first DAT file!
|
|
John VanZwieten wrote ... (...) the (...) camera (...) I think it is unfortunate that MLCad uses the same "0 ROTATE" command as LDLite. Other parsers (like L3P :) may get confused. L3P can skip 0 ROTATE 180 0 0 REL 0 ROTATE 90 0 0 ABS 0 ROTATE 10 0 (...) (25 years ago, 1-Nov-99, to lugnet.cad, lugnet.cad.dev)
|
| |
| | Re: LDraw pieces printing
|
|
(...) Yeah, except this time I didn't back absolutely everything up, and I had to get help with the network settings. OBLEGO: What happened to the 9906 update? Hasn't it been about 4 months since we voted? (pardon my ignorance or lack of tact if the (...) (25 years ago, 30-Oct-99, to lugnet.cad.dev)
|
| |
| | (canceled)
|
|
|
| |
| | Re: HOSER problem
|
|
Fredrik Glöckner <fredrik.glockner@bio.uio.no> wrote in message news:m3zox33m1d.fsf@....uio.no... (...) yourself. (...) the (...) the (...) The user supplied end and control points are used, regardless of the resulting hose length. The intermediate (...) (25 years ago, 29-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: [ldraw.org] Model of the Month
|
|
(...) Thanks! I'm very happy with the model and the picture. Of course, that was the only time L3P has ever worked for me. :) I think most of us can guess which two or three are in the lead. :) (...) So, uh, vote for my model and get $1000!! Yeah, (...) (25 years ago, 29-Oct-99, to lugnet.cad.dev.org.ldraw, lugnet.general)
|
| |
| | Re: HOSER problem
|
|
(...) Sorry for interrupting. Just out of curiosity, I would like to ask if you use the end and control points the user chooses to compose the Bezier curve, or if you alter the control points to achieve the proper length of the curved hose? I don't (...) (25 years ago, 28-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: [ldraw.org] Model of the Month
|
|
(...) Yeah there's some stiff competition, from the stats as of now it looks like two or three of the models will be competing neck-and-neck (I won't say which ones). Jeff, your A-Wing model *does* rock :) (...) Hee... Um, I forgot to announce it I (...) (25 years ago, 27-Oct-99, to lugnet.cad.dev.org.ldraw, lugnet.general)
|
| |
| | Re: HOSER problem
|
|
I placed the required part(752 ??) where it needs to be and then used that point for getting the end of the hose where I want it. This is what I've been doing all along and I've never gotten the wierd end point like I was experiancing with this one. (...) (25 years ago, 27-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: HOSER problem
|
|
Ryan, Remember that first you need to place the hose ends in the model yourself. Then determine the x,y,z of the "top" of each hose end. These will be the endpoints for hoser. Add the control points, and hoser will calculate the position and (...) (25 years ago, 27-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: [ldraw.org] Model of the Month
|
|
(...) Yeeouch! Talk about stiff competition for A-Wing! Look at that Statue of Isis! Amazing! I guess I won't be winning this month, especially when there are so many better models to choose from! I'm also gonna have a hard time voting! Pardon me (...) (25 years ago, 27-Oct-99, to lugnet.cad.dev.org.ldraw)
|
| |
| | Re: Minifig Fire Helmet (3834)
|
|
Hi For the parts with some regularity (helmets etc) I draw them up on graph paper, showing three projections, converting the curves to polygons/prisms, using judgement as to the level of detail. Circular sections follow the 16-agon standard, curves (...) (25 years ago, 26-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: LDraw pieces printing
|
|
Sorry for not replying sooner, but I had to re-format my hard drive for the second time in a year. Anyway, assuming LUGNet actually lets me post this time, my parts catalog can be found at (URL) this helps, --a signatureless (due to the web (...) (25 years ago, 26-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: LDraw pieces printing
|
|
(...) LDAO does have a catalog print function, which is a quick way of printing the bricks. Or you can look for Patrick's printable catalog, which has a better/more compact layout. You can find a link to the catalog by searching lugnet.cad.dev for (...) (25 years ago, 25-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: LDraw pieces printing
|
|
(...) That's spiffy. Snarf away! Steve "Never trust anything that can think for itself, if you can't see where it keeps its brain." (25 years ago, 25-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: LDraw pieces printing
|
|
(...) Steve Bliss has this page: (URL) isn't optimized for printing, but I snarf myself a copy from time to time anyway... (I hope that's okay, Steve!) Arguably, you could download the pages, re-format the tables so that you double up the skinnier (...) (25 years ago, 25-Oct-99, to lugnet.cad.dev)
|
| |
| | LDraw pieces printing
|
|
Heya all ! Where is the best way to print the whole LDraw pieces catalog ? I mean I want print all pieces and I don't know from where may I print them. From VEC catalog in LDraw or from somewhere on Internet ? Thanx. Rene e-mail: (...) (25 years ago, 25-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: Mindfest
|
|
(...) Hi Larry. Be there in a few minutes. :) (25 years ago, 23-Oct-99, to lugnet.general, lugnet.robotics.events, lugnet.cad.dev, lugnet.admin.general)
|
| |
| | Mindfest
|
|
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)
|
| |
| | HOSER problem
|
|
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)
|
| |
| | Re: Line in the Sand
|
|
(...) 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)
|
| |
| | Planned downtime for ldraw.org
|
|
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)
|
| |
| | Re: Line in the Sand
|
|
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)
|
| |
| | Whither Terry Keller?
|
|
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)
|
| |
| | Re: Line in the Sand
|
|
(...) 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)
|
| |
| | Re: Line in the Sand
|
|
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)
|
| |
| | Re: Line in the Sand
|
|
(...) 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)
|
| |
| | Re: Line in the Sand
|
|
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)
|
| |
| | Re: Line in the Sand
|
|
(...) Yes. How are you on travel? :-) (25 years ago, 21-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: Several replies to CLIPPING / WINDING
|
|
(...) 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)
|
| |
| | Re: Line in the Sand
|
|
(...) 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)
|
| |
| | Re: Object Orientation & DAT files & CLIPPING/WINDING
|
|
(...) 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)
|
| |
| | Re: Line in the Sand
|
|
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)
|
| |
| | Re: Line in the Sand
|
|
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)
|
| |
| | Re: Line in the Sand
|
|
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)
|
| |
| | Re: Line in the Sand
|
|
(...) 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)
|
| |
| | Re: Object Orientation & DAT files & CLIPPING/WINDING [DAT]
|
|
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)
|
| |
| | Line in the Sand
|
|
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)
|
| |
| | Minifigure Torso Generator
|
|
Hi , at 19.10.99 Jonathan Wilson wrote in a mail: JW> The password is modelling (mabie that should be in the faq? Maybe. There I had realy not been looking for a password, my fault. JW> -- Jonathan Wilson wilsonj@xoommail.com JW> (URL) Joachim. (URL) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: Several replies to CLIPPING / WINDING
|
|
(...) No. With current files, you don't know, so you can't assume anything. (...) No, inversions are common. (...) Right. So non-wound-up files can't be backface culled. I don't see what you're getting at here. (...) But we don't get to specify what (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: Several replies to CLIPPING / WINDING
|
|
(...) This is a problem of the current design (the one beeing used now). You didn't knew in the past, because you didn't have the 0 INVERT meta-command. So you can only assume it' NOT inverted. If for some reason, it is inverted, then the old .DAT (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: Fixed #3228a is ready
|
|
I'm suffering from burnout working just half-time and therefore I have some time over. Had to look up the word "tapered" in my dictonary. That's my only faint objection. Thanks for your trouble, /Tore (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: Several replies to CLIPPING / WINDING
|
|
(...) That's not true. If a super-file is not certified, then there's no way to tell if the subfile is normal or inverted. So when a file is referenced by a non-certified super-file, it can't be clipped, even if the referenced file is certified. (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: Object Orientation & DAT files & CLIPPING/WINDING
|
|
(...) Great! (...) It's local when you look at it in the .DAT where it is used. It's effect is NOT local, when you are looking from the renderer program's view, because it has to keep track of the current invert state. The INVERT meta-command only (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: Object Orientation & DAT files & CLIPPING/WINDING
|
|
(...) Yes it is. (...) The reference of the current GLOBAL state is passed down the file-reference tree, YES. (...) Correct. (...) NOT the FILE, but the RENDERING PROGRAM ! (...) Agreed. (...) By default would be CCW. (...) YES and NO. The internal (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: Object Orientation & DAT files & CLIPPING/WINDING
|
|
(...) If by default you always use the same winding, then you can know the orientation of the polygon on the fly. IF you mix both you will have a hard time, because you are mixing or reference. (...) That I agree! but my NOTE (suggestion) to pair (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: Several replies to CLIPPING / WINDING
|
|
(...) Great ! (...) Don't be pessimistic ! As soon as people see that their models render twice as fast, they will start using the new features. And a utility to make the optimization job easier would make a big difference, to all the lazy people ;) (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
|
| |
| | Re: Several replies to CLIPPING / WINDING
|
|
(...) That can be done, but you will probably suffer a performance hit, because, most hardware, just use a bit, to keep track of the state. Just minimize the use of the 0 CCW and 0 CW meta-commands, to boost performance. When optimizing existent or (...) (25 years ago, 20-Oct-99, to lugnet.cad.dev)
|
