 | | Re: Voting Open for LCAD Parts Update 2000-01
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(...) I have a few comments: 2717.dat - Technic Seat Should we call this part "Technic Seat 3 x 2 Base" for clarity? I'm aware that theere is only one technic seat at the moment, but this might change, plus a more descriptive name may be in place. (...) (25 years ago, 11-Apr-00, to lugnet.cad.dev)
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| | Voting Open for LCAD Parts Update 2000-01
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[FUT lugnet.cad.dev] I've (finally) posted the page for voting on the next parts update. Before you run off to check things out, I've got a couple of items of business: First off, I want to extend apologies for taking so long on this thing. The last (...) (25 years ago, 11-Apr-00, to lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | LDraw Help Desk/Reference
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Greetings The ldraw.org website is in serious need of a help section for troubleshooting installation problems. It seems that on a weekly basis I receive a few emails asking about the RTE200 and Error 003. I am not very technically up to par on (...) (25 years ago, 11-Apr-00, to lugnet.cad.dev.org.ldraw, lugnet.cad.dev) !
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| | Re: Technic Wingback Piece - 2744.DAT
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Thank you Steve and Mike! -Tom McD. when replying, spamcake was served on Jabba's barge, but for some reason no one complained. (...) site Mike (...) (25 years ago, 10-Apr-00, to lugnet.cad.dev.org.ldraw)
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| | Re: Some Words To BFC [DAT]
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Steve Bliss <blisses@worldnet.att.net> wrote in message news:dq3sesgb6vsh8kd...4ax.com... (...) flips (...) than (...) with (...) for (...) in (...) This makes a lot of sense to me. You are right, checking one flag per part file should not take too (...) (25 years ago, 10-Apr-00, to lugnet.cad.dev)
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| | Re: Technic Wingback Piece - 2744.DAT
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(...) That file should be in the ldraw\p directory. It appears that the only update release with this primitive file is lp97-14.exe. This update is available from the LDraw homepage, at (URL). Download times from Australia can be slow, you can try (...) (25 years ago, 10-Apr-00, to lugnet.cad.dev.org.ldraw)
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| | Re: Where is Part 4589.dat Cone 1 x 1?
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(...) I've got the 4589.dat file in my ldraw\parts directory, dated January 9, 1997. This date indicates that 4589 should be in the ldraw.exe distribution file. Oh, wait: here's the problem. As of the LCAD 97-17 update, the Cone 1x1 part was moved (...) (25 years ago, 10-Apr-00, to lugnet.cad.dev)
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| | Where is Part 4589.dat Cone 1 x 1?
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Hi, Playing with Ldraw yesterday I couldn't find the part 4589.dat Cone 1 x 1 in my Parts directory. I thought my Parts dirtectory were corrupted and reinstalled everything from James' ldraw.exe and all updates (lp97-13 ... -17, 10 updates in '98 (...) (25 years ago, 10-Apr-00, to lugnet.cad.dev)
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| | Technic Wingback Piece - 2744.DAT
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Firstly, let me say (because I don't think it's said enough) thanks to all the LDraw wizards that keep those new parts coming! Secondly, I must regret that I'm piping up in here at the moment cuz I found something that needs fixin. Let me also say (...) (25 years ago, 10-Apr-00, to lugnet.cad.dev.org.ldraw)
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| | Re: MOTM April
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Thanks John! -Tom McD. when replying, spamcake scouring pads remove everything from your dishes, including the pattern. (...) (25 years ago, 10-Apr-00, to lugnet.cad.dev.org.ldraw)
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| | Re: Subparts for Black Falcon and Wolfpack Patterns ?
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(...) Let me rephrase that... I just make the design from the shields 50% smaller. (25 years ago, 9-Apr-00, to lugnet.cad.dev)
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| | Re: Subparts for Black Falcon and Wolfpack Patterns ?
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(...) I would prefer that you do that, because you can get the sizes right. I just used 0.5x for the scaling on the shields. (25 years ago, 9-Apr-00, to lugnet.cad.dev)
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| | Re: Subparts for Black Falcon and Wolfpack Patterns ?
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(...) weekend), (...) could (...) I am proposing an alternative way of handling the castle logos which are common to the shields, torsos and flags. I have put the logos into subparts. It also seems to make sense to synchronise the Pxx number across (...) (25 years ago, 8-Apr-00, to lugnet.cad.dev)
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| | Re: Subparts for Black Falcon and Wolfpack Patterns ?
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(...) That sounds like a reasonably good idea. :) Steve -- Reduce, reuse, recycle ... bits (25 years ago, 8-Apr-00, to lugnet.cad.dev)
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| | Re: 71184 Bar 4.5L Straight is too short
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(...) I hope the added length doesn't mess up any models... (but I suppose the short version made some of my models look weird on other people's machines :) (...) I'm flattered. Maybe I should attempt a complete part sometime. --Bram Bram Lambrecht (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Subparts for Black Falcon and Wolfpack Patterns ?
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When I fix the bowties in the Black Falcon and Wolfpack shields (this weekend), would it be more sensible to make each pattern a subpart (or two), which could be shared between shields, torsos and flags, scaled appropriately? If I had done this to (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: BFC checking program (was Re: Some Words To BFC)
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(...) Umm, it's a little more than that, but facing the faces is a very important part. Basically, I meant: 1. All polygons wound correctly 2. All subfile references clean Good point about primitives not being solid. I don't think a renderer (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: Is James' website finally gone for good?
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(...) Sure. They said they'd be in contact with me as soon as they returned, so I'll bring it up then. -Tim (URL) timcourtne ICQ: 23951114 (25 years ago, 7-Apr-00, to lugnet.cad.dev.org.ldraw)
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| | Re: BFC: LITS 2
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(...) Yes, it did. But I'm pretty sure that all important topics have been addressed (or re-addressed) since that thread started. (...) Yes, and today it will change to version 10. But version 4 was a big rewrite, where the language changed from (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: BFC: LITS 2
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(...) Actually, the problem is that their determinant is 0, neither positive nor negative. So the renderer would have to disable BFC processing for any file with this kind of reference. Another problem (that L3P handles in most cases) is that (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: BFC: LITS 2
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(...) Oh, good. :) I wasn't sure before, but after posting a follow-up to John today, I figured it out. Now, about those transparent parts with decorations... Steve (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: BFC: LITS 2
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(...) I think we're using different meanings here. By 'local clipping', I mean the clip-setting in a subfile disappears when that subfile is finished. It is not carried back up to the superfile, and it is not reinstated if the same subfile is used (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: BFC: LITS 2
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(...) Unless we have a solution to the invert case, the document's assertion is correct. (...) I think you are correct that NOWIND/UNKNOWN is not important/needed. For now, let's proceed assuming that decorations will be handled by using NOCLIP or (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: BFC: LITS 2
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(...) I've kept thinking about it, and I don't see a solution. There are some algorithms that can figure out the normal/inverted question in some cases, but these algorithms would be too slow to implement in a rendering program. And they are not (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: Is James' website finally gone for good?
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(...) Tim, do you want to ask them, as the head honcho of ldraw.org content? Jacob, do you have a copy of James' site-files? I do, if you don't. Oops--I just checked, his site is back online. But maybe it makes sense to have a permanent mirror in (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev.org.ldraw)
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| | Re: 71184 Bar 4.5L Straight is too short
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(...) I don't have the fix, but I did locate it on lugnet.cad.dat.parts. Normally, I'd require you to e-mail me the fix before I'd put it in an official release, but since you're a good modeler, I'll let it go this once. Just don't tell anyone. ;) (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) OK, here's a counter-proposal: don't require all parts/primitives to be BFC'able, and allow both BFC-ready and BFC-not-ready files in the same rendering. This reintroduces the concept of having a single meta-statement at the start of each (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: Performance Improvement [DAT]
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(...) As I said before, in this case it's more correct to use 3-4disc primitive, to avoid the T type juntions. (...) Yes, cracks may appear ! Same problem like in a T type junction But has someone said, nothing like real/concrete testing, so here (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: Performance Improvement
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Steve: (...) I can't see how Rui's suggested change gives any problems at all and I don't mind a few percent speed increase. (...) And? Does the "diameter line" not cross the radius? If there is a significant risk of a misalignment, then we (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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On Fri, 7 Apr 2000, Leonardo Zide wrote: [...SNIP...] (...) Actually I think you missunderstood something (or maybe I did), but the 0 INVERSE meta command is to be used ONLY with file references, that is: 0 INVERSE 1 16 x y z a b c d e f g h i (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: BFC checking program (was Re: Some Words To BFC)
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I seem to be missing a required .dll file: MFC42D.DLL. Can you send this, or can I find it somewhere else? -John Van (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC [DAT]
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(...) I don't mind that because I preprocess the files anyway and anyone who wants to get a good speed increase should do the same. But it's not a good idea to turn on/off BFC several times and in some cases, it's nicer to have the faces reversed. (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | BFC checking program (was Re: Some Words To BFC)
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(...) I'm assuming that you're calling "BFC-ready" primitives that have all faces in the same direction. Primitives are not closed volumes so you'll always be able to see the backfaces. (...) I agree technically it doesn't make much difference, I (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev)
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| | Re: Is James' website finally gone for good?
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(...) Good idea. I know James parents are in Europe for another week or so I believe - they get back on something like the 14th if I remember correctly. -Tim (URL) timcourtne ICQ: 23951114 (25 years ago, 7-Apr-00, to lugnet.cad.dev.org.ldraw)
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| | Re: Is James' website finally gone for good?
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Steve: (...) It would be very sad if all his work is lost, so we should definitely offer to host the site on ldraw.org, unless James' parents have another idea. (...) I think we should ask them about it. - And also ask if it is ok to continue the (...) (25 years ago, 7-Apr-00, to lugnet.cad.dev.org.ldraw)
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| | Re: Some Words To BFC
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Steve Bliss <blisses@worldnet.att.net> wrote in message news:a5mpess6nipq4bp...4ax.com... snip (...) Me too. -John Van (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: 71184 Bar 4.5L Straight is too short
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(...) Yeah, I fixed it once (and posted the fixed file), but I don't know if my fix ever made it to an official update... --Bram Bram Lambrecht / o o \ BramL@juno.com ---...---oooo-----(_...o---...--- WWW: (URL) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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Steve Bliss <blisses@worldnet.att.net> wrote in message news:i86oessafp98dp6...4ax.com... (...) These are both very good criticisms of my proposal--so I'll just modify my proposal :) If we fix all the official parts, then the renderer doesn't (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) As someone pointed out once, it's not a big deal to get all windings the same before passing the data to OpenGL. Just swap the order of the points. For quads, switch points 2 and 4. For triangles, switch points 2 and 3. This could/should be (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: 71184 Bar 4.5L Straight is too short
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(...) I'll doublecheck this issue tonight. Seems like we had this discussion before, but I don't remember the details. Argh. Steve (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) The primitives should be the first thing fixed, in any case. :) I think it would be safe for the cleanup program to assume that primitives are BFC-ready. Which could be a help for automatic cleanup of part files. (...) Some technical points: (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) Would it help to get primitive files cleaned up, and then make use of what is known of the faces in the primitive to decide the orientation of faces in the part? What I mean is, if you follow a ray from the center of a face, and the (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: The geometry of minifigs
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(...) No, it doesn't. But it has the head, arms, hands, legs and hips. Fredrik (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | 71184 Bar 4.5L Straight is too short
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Hi, I just noticed that the part "71184 Bar 4.5L Straight" is too short. According to my findings, it should have been approx 8 LDU longer. Fredrik (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Is James' website finally gone for good?
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I just tried to access James Jessiman's parts reference site. See (URL). It came up as not found, as did James' home page. This has happened sometimes in the past, but I also tried to access the main site, (URL). This page makes it sound like the (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev.org.ldraw)
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| | Re: Are anybody working on the Star Wars Battle Droid arms?
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(...) cad modeller and then converted by stl2dat ! wasn't it ? I would like to recommend you and every body else which will use this type of lego part building (CAD -> convert program(ex:stl2dat)), to be very carefull with the tesselation (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) When do you actually stop, when you find the correct orientation ? or after a few fixed iterations ? Eventually you could end up with an infinite loop if you are not carefull. That method does NOT really garantees any correct results due to (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: The geometry of minifigs
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(...) Da, you are correct. I'd go with the (14,0) shoulder position -- it has better (hidden) precision. 14.345 is derived, as you pointed out, and it is rounded. Does LGEO have the minifig torso? It'd be so nice to have truly rounded edges and (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: The geometry of minifigs
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(...) Ok, thanks. I understand. It's not interesting for me (in this setting) to know the angles and offsets of the _true_ minifig. What is of interest is the values that were used to _model_ the minifig. This is because what I want to do is to pose (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Are anybody working on the Star Wars Battle Droid arms?
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(...) minifig scale battle droids from the LEGO System Star Wars theme. Of course, I am also very happy to see that you are working on the larger version you showed me above. Great work! Fredrik (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) When it finds that any face of a primitive needs to be inverted. We would have to fix the current primitives so that all faces are pointing to the same direction. Take a look at the sphere primitive for example, it has faces pointing inside (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) I can't speak for the other programs but if you allow a part to have CCW and CW faces in any OpenGL program, it's going to be slower (but as LeoCAD's library is pre-processed than it won't be a problem). If you have some parts BFC compliant (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) That would be the fastest option for rendering. (...) If anyone wants to take a look and help, I can send the source to what I have done so far (it needs VC++ 5.0). I have started working and I won't have much time to improve it. (...) I still (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) I agree that an automatic process might not always work 100% but it can make parts almost perfect and with only a small effort you'll be able to completely fix them. (...) I think I'm using what you call odd/even, I cast a ray from the center (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) If you use a 3D card then the speed increase from BFC becomes negligible, I've tried to activate BFC on LeoCAD and it didn't show a big difference with the current library. Keep in mind that the current cards (except the newer GeForce) have a (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Are anybody working on the Star Wars Battle Droid arms?
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(...) Have a look here (URL) Klein A Mindstorms fan. (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | stl2dat converter now read binary stl
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Good news for Autocad part developers ! My stl2dat converter now reads binary stl files. It recognises binary files automatically. I also introduced a new option to set the origin, because some cad-cam programs can only produce stl files where all (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: The geometry of minifigs
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(...) No, the part is authored with an angle of 9.782. The (x,y) values of the lower facet of the shoulder is (14.345,2) and that at the waist is (19,29) - hence 4.655/27. Or alternatively the top of the torso is (14,0), giving 5/29 - the same (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Are anybody working on the Star Wars Battle Droid arms?
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Are anybody currently working on the Star Wars Battle Droid arms? I would like to use these in a model, and would be quite happy with some simple mock ups. Thanks! Fredrik (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: The geometry of minifigs
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(...) Thanks. Can I safely assume that the author used 10 degrees when modeling the part? BTW: This is just what I find unuserfriendly about the parts library: You had to reverse engineer the part to find the angle. I'm sure the information I asked (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) the (...) therefor (...) I would suggest to make the meta-commands for the renderer as simple as possible and move all other corrections to external programs or functions. I believe that what we have of BFC in MLCad for example is good enough (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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OK. I've thought about most of John's posting, and I think I'm ready to make an intelligible response. Just to be sure I caught everything, here's a (hopefully quick) re-iteration. The major differences between John's proposal and the proposal I (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) What would you suggest simplifying or removing? (...) How do you mean? What is a 'bad definition' in a matrix? Having a negative determinant? And what do you have to do to correct it? My understanding was that the rendering program could (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) That's not always possible, as has been discussed. And is still being discussed... (...) Yeah, that's a possibility. (...) OK, but that's a complication for the rendering engine. It would have to check the actual path of each file, after the (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) Good point. We definitely *should* muddy this discussion up with some real facts. ;) (...) Yes and no. Something that's easy to do is definitely less of a 'requirement' than something that's a lot of work. But it's still a requirement, placed (...) (25 years ago, 6-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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Steve Bliss <blisses@worldnet.att.net> wrote in message news:4qbnescr7hii5bq...4ax.com... (...) I hope it doesn't cause indigestion :-) -John Van (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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|
Steve Bliss <blisses@worldnet.att.net> wrote in message news:v96neskqugbi18b...4ax.com... (...) use to (...) object (it (...) faces (...) choose (...) in some (...) required to (...) the (...) You make a very good point here, Steve (especially (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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I need to digest this. I'll respond tomorrow. Steve (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Performance Improvement
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|
Rui, I think that it's better to keep the 4-4disc and 2-4disc files the way they are. The current configuration is more flexible, requires fewer special-size primitives, and is less likely to be mis-applied. The new proposal would only provide a (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Sphere Primitive
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(...) You'd have to ask James these questions. Only he would know. It *looks* like the non-planar quads could be a rounding error, or rounding limitation, since he used just 2 decimal places. Steve (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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|
Chuck Sommerville <chucks@he.net> wrote in message news:FsK824.2vK@lugnet.com... (...) I was talking about rendering engines like LDLite, MLCad, L3Lab, etc. You are correct that BFC won't help ray tracing. The big thing that would help ray tracing (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) In other words, every face in a subfile will have other faces in the part-construction that will form the other side of the solid, right? That sounds correct. (...) There are only a couple of non-symmetrical primitives, but they are used (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) BFC wont help ray tracers. Just because a surface isn't visible from the _current_ camera position, doesn't mean it doesnt cast a shadow or a reflection. Ray tracers need those backsides. -Chuck (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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|
koen <koen.jordens@studen...ven.ac.be> wrote in message news:FsK5CI.BxG@lugnet.com... (...) time, (...) "Fast" is a relative term. For very large models, Datsville for example, it takes long enough to render that even a 30% increase in speed makes (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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|
I've got a little question. Why are you working so hard on BFC. The rendering in Ldraw, L3lab, MLcad,.... is already very fast. Is the speed improvement gained with BFC supposed to provide the extra time, so you can turn an model in realtime, with a (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: The geometry of minifigs
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(...) The angle of the side of the minifig torso as Ldrawn is 9.782 degrees (arctan 4.655/27) from the vertical. Hope this helps. Chris (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | The geometry of minifigs
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At what angle and point do the arm/shoulder of the minifig connect to the torso? What is the angle and offset of the bend of the minifig arm and what is the angle of the hand with respect to the pin which connects it to the arm? I don't see how (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) This points out that ray traced renderings of the transparent version of these pieces will not render the refraction correctly. In the best of all worlds, the interior surface would be removed. For ray tracing, the model could be replaced with (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Sphere Primitive
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(...) I suspected this problem when I reviewed the precision of all the circular primitives, which is why I left them alone at that time. But... I never went back to check thoroughly! Chris (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) That's is the (Odd/Even) test, also with Raycasting, but no supersampling, in the supersampling case, you just subdivide the polys further and further, or shoot pseudo-random rays until you find the correct normals for all faces. this does NOT (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) Perhaps this approach is a bit naive, but couldn't you use something similar to a point in polygon test? Cast a ray along the normal from the center of each polygon. If it intersects an odd number of surfaces then the normal points toward the (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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Leonardo Zide <leonardo@centroin.com.br> wrote in message news:38EB3EB8.D81D2C....com.br... (...) here, (...) Hey, this idea might work in conjuction with your program that fixes parts. If we had a parallel directory (/pi/?) with a copy of each (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) If you assume (which is correct for lego parts) that every *.dat file you use to define a part, belongs to a whole object (the part) which is a solid object (it should be) then you can say that any of those subfiles can have their faces (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) it. (...) the (...) not (...) checking (...) which (...) (Lines, (...) OK, Slowly ... A model-file always is BFC complient until it gets included and you don't know anything about it. But the root model can do what it likes, it will effect (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Sphere Primitive
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Is it just me or the sphere primitives have non planar quads ? Or is the sphere distorted to allow for planar quads ? Why where the sphere done in this way instead of the usual (full quads with triangles on the poles) or (all triangles) ? I hope (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) but it seams to be damaged, but I was able to get the ideia. (...) Well this is exactly what I have been researching for a month now ! and believe me to be able to correct files 100% is almost impossible, due to the way the files are built. (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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Rui Martins <Rui.Martins@link.pt> wrote in message news:Pine.GSU.4.10.1...0@is-sv... (...) saying, (...) subfiles (...) those (...) fixed. (...) restrictions, (...) it. (...) until (...) the (...) allows (...) a (...) apply), (...) user. (...) (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Performance Improvement
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(...) In this case you should be using 3-4disc.dat (rotate it if necessary). (...) Maybe for this case there should be a "5-8disc.dat" But that would probably mean changes to already made parts. (...) This is what is generally called a T junction, (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) Yes, the correct and safe assumption is CLIPPING DISABLED. (...) This is just a Hack, you assume that a model file is compliant, or by checking its pathname or because it's the root of the branches. But this doesn't even work very wheel, if (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) I don't think they should. Parts authors are (probably) motivated by their interest for the LDraw format, so I would expect a few to handle the BFC-compliance of their parts. But to demand that everybody do this would probably exclude far to (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Performance Improvement
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Rui Martins <Rui.Martins@link.pt> wrote in message news:Pine.GSU.4.10.1...0@is-sv... (...) and (...) point (...) I don't see a problem with doing this for the 4-4disc, but it would be a problem for the 2-4disc. The 2-4disc is often used in (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Performance Improvement
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Oops ! wrong links. (...) Should be HTTP://is-sv.link.pt.../nstud.png (...) Should be HTTP://is-sv.link.pt.../xstud.png (...) Also I forget to mention that this reduces the number of triangles by 2 (for each stud) isn't that great ? See ya Rui (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Performance Improvement
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Since the BFC discussion has everything to do with performance improvement, I would like to propose the following changes to the primitives: - 4-4disc.dat - 2-4disc.dat Remove the point which lies in position (0,0,0), because it's NOT required and (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) I'd like to have all parts compliant by making a second copy of the primitives that can't be inverted instead of using "0 INVERSE" commands. Leonardo (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) I believe that it's possible to create a program that automatically fixes the orientation of a part. Take a look at this picture: (URL) The red faces are the back faces and the green faces are the front faces. The image on the left is the part (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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In lugnet.cad.dev, Rui Manuel Silva Martins writes: <SNIP> (...) until (...) <SNIP> This is not true: Since the renderer has to assume a certain state for his models. The thing (at least in MLCad) works as follows: If BFC is on than the model is (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) Completly agree, but part authors should strive to (if possible) present the parts for voiting already BFC compliant. But it's NOT a requirement. This reasoning also favours the "non branch BFC dependence", even authors which don't supply BFC (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) This is common to both every approach I have seen, obviously ! (...) Nope! No imediate benefits, because with the parent dependence restrictions, you have to have an entire branch compliant to be able to do BFC, which includes the root,i.e. (...) (25 years ago, 5-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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Steve Bliss <blisses@worldnet.att.net> wrote in message news:7cjkescmg077t76...4ax.com... (...) into (...) IMHO, no. If a mostly automated cleanup tool can be devised, then a few of us could clean up new parts after they are voted in and before (...) (25 years ago, 4-Apr-00, to lugnet.cad.dev)
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| | Re: Some Words To BFC
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(...) A second question: *should* parts be required to be BFC-compliant? There is a certain amount of extra work required to make parts work for BFC. Without a mostly-automated cleanup tool, does it make sense to put this burden on part authors? (...) (25 years ago, 4-Apr-00, to lugnet.cad.dev)
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