 | | Re: Automated Inventory Ordering through Bricklink
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I wrote a utility, for my own use, about two years ago that takes a .dat file and attempts to find "best" way to buy the parts via BrickLink. I'd planned to produce custom sets and source the parts for them this way. It was working well when last I (...) (20 years ago, 14-Jan-05, to lugnet.inv, lugnet.cad.dev, lugnet.cad.mlcad, lugnet.market.brickshops)
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| | Re: Restart of LDA Project (using LDraw models - L3P - POV)
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(...) I already am. :) I noticed that L3P already marks the beginning of these blocks: // Camera (Latitude,Longitude,Radius = 45,45,0) and // Lights: Now, I've asked Lars to let L3P also mark the ends of these blocks. (...) No it isn't. Btw, I'm (...) (20 years ago, 14-Jan-05, to lugnet.cad.ray, lugnet.animation, lugnet.cad.dev)
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| | Re: Restart of LDA2001 Project (using LDraw models - L3P - POV)
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(...) In the coming L3P each section is tagged with POV comments like //// ModelObject //// Camera //// Lights exactly to help cutting out the interested POV code. (...) I'm reluctant to adding too much complexity into L3P to suit different special (...) (20 years ago, 14-Jan-05, to lugnet.cad.ray, lugnet.animation, lugnet.cad.dev)
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| | Re: Restart of LDA2001 Project (using LDraw models - L3P - POV)
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(...) Since L3P is released only every four years or so, it shouldn't be a problem :-) /Lars (20 years ago, 14-Jan-05, to lugnet.cad.ray, lugnet.animation, lugnet.cad.dev)
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| | Re: Automated Inventory Ordering through Bricklink
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(...) You could try BrikTrak. If I recall, it has a DAT file upload feature and it interfaces with Bricklink. (URL) (20 years ago, 14-Jan-05, to lugnet.inv, lugnet.cad.dev, lugnet.cad.mlcad, lugnet.market.brickshops)
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| | Re: Restart of LDA2001 Project (using LDraw models - L3P - POV)
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(...) I guess we would have to work with Lars on that. Because your app is in Delphi, I would be interested in the syntax you develop. Implementing on different platforms is not as big of a deal in my opinion. I am mostly interested in this because (...) (20 years ago, 14-Jan-05, to lugnet.cad.ray, lugnet.animation, lugnet.cad.dev)
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| | Automated Inventory Ordering through Bricklink
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Greetings all, I was discussing some time-saving MOC parts ideas and I came up with an idea for a software utility that could significantly reduce the amount of time spent digging around for loose parts. Currently, to the best of my knowledge, when (...) (20 years ago, 14-Jan-05, to lugnet.inv, lugnet.cad.dev, lugnet.cad.mlcad, lugnet.market.brickshops)
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| | Re: Very small triangle and a quad that thinks its a tri
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(...) Silly question time. Where can I download the latest versions from. My usual place (the zip files on your web site) are still dated sometime in 2001! thanks William (20 years ago, 14-Jan-05, to lugnet.cad.dev)
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| | Re: Restart of LDA2001 Project (using LDraw models - L3P - POV)
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(...) I've been thinking a lot about that. I think you can find a couple of threads here if you perform a search on "post-processing" or "post-processor". But... What if a futureversion of L3P has some new improvement and changes the syntax of the (...) (20 years ago, 14-Jan-05, to lugnet.cad.ray, lugnet.animation, lugnet.cad.dev)
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| | Re: Very small triangle and a quad that thinks its a tri
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(...) That's a small triangle! Side lengths: 0.0684 0.0671 0.0132 The reason it doesn't show in L3Lab is that you have color coded it in your file! Back in 1998 PovRay would crash if it was given a triangle with collinear vertices and a texture (...) (20 years ago, 14-Jan-05, to lugnet.cad.dev)
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| | Re: Restart of LDA2001 Project (using LDraw models - L3P - POV)
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(...) That is what I was going to do too. (...) I guess what I was thinking was exporting a file that could either be povray format, a format that l3p could convert (preserving unions, macros, etc), or a format that I would use with Anton's library (...) (20 years ago, 14-Jan-05, to lugnet.cad.ray, lugnet.animation, lugnet.cad.dev)
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| | Re: Restart of LDA2001 Project (using LDraw models - L3P - POV)
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(...) Thanks for the response. Just a qiuck reply, got to go back to work... LDA outputs both .dat files for the indiviual frames but also one master .dat that has references to the single-frame files, separated by CLEAR and STEP. L3P supports (...) (20 years ago, 13-Jan-05, to lugnet.cad.ray, lugnet.animation, lugnet.cad.dev)
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| | Re: Restart of LDA2001 Project (using LDraw models - L3P - POV)
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(...) Tore, I think I know what you could do that would meet even my needs. Here is my idea. Output one pov-ray file. Have it export valid pov-ray format using unions, macros, clocks, switches, ranges, etc. Then, with that, it will be easy to add (...) (20 years ago, 13-Jan-05, to lugnet.cad.ray, lugnet.animation, lugnet.cad.dev)
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| | LDraw.org Contributer Agreement Affirmation
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Hi all, Thanks for all the words of support regarding the LDraw.org Contributer Agreement. We've received quite a few responses but would like to wrap up this issue as quickly as possible. For those who haven't heard of the CA here's the (...) (20 years ago, 12-Jan-05, to lugnet.cad, lugnet.cad.dev, lugnet.cad.dev.org.ldraw)
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| | Re: Change to existing policy regarding the subfiling of dithered colors
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(...) many, many thx to the LSC for getting the job done so quickly :-)))) w. (URL) (20 years ago, 9-Jan-05, to lugnet.cad.dev)
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| | Re: Very small triangle and a quad that thinks its a tri
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(...) I'll send you the whole file (its not complete yet), but the values for the tri are A (0.989107, -1, 0) B (0.997785, -0.98677, 0.06652) C (0.997785, -1, 0.06652) William (20 years ago, 8-Jan-05, to lugnet.cad.dev)
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| | RE: *** SPAM *** Re: Very small triangle and a quad that thinks its a tri
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(...) Only at 5dp (ie -det/-dist of 0.00001), but then as the values are only to 5dp this is not surprising! The co-linear vertices are reported for any -det/dist values from 1 to 0.00001 William (20 years ago, 8-Jan-05, to lugnet.cad.dev)
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| | Re: Very small triangle and a quad that thinks its a tri
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(...) I think so too. William, could you please e-mail me the actual coordinates of A, B, etc., and perhaps the whole file. (...) Good question! (...) The colinearity test currently has a hardcoded threshold of 0.01. The colinearity test is carried (...) (20 years ago, 8-Jan-05, to lugnet.cad.dev)
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| | Re: Very small triangle and a quad that thinks its a tri
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(...) I'm guessing this is a limitation of the accuracy of the l3p -check, so probably ignorable. Does the -dist option affect this test too, or just the coplanar quad test? Maybe there could be another option in l3p to adjust the accuracy of the (...) (20 years ago, 8-Jan-05, to lugnet.cad.dev)
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| | Very small triangle and a quad that thinks its a tri
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Whilst working out the non-right-angled cylinder intersection sub-parts for the Boat Rigging pieces I have run into two related problems 1) I have a triangle A-B-C that is so tiny that L3P reports it as co-linear and L3Lab doesn't render it (it (...) (20 years ago, 7-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) Hi Lars. Hey, I've got an idea. Stop adding new features (for a little while) and just release it. ;^) Pretty please with extra sugar? (...) Nifty solution, but what if someone looks down the hose and sees it's all blocked up with spheres so (...) (20 years ago, 7-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) (snip) (...) I'll add 4-4cyls.dat, so that shouldn't hold you back. Also, in the coming version you can add primitives yourself. (...) Another way to achieve no overlap is the method I used in 30093.dat "Plant See Grass": I simply placed (...) (20 years ago, 7-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) OK, here's my VERY LAST word on the subject: Transforming both 4-4cyls S0-S1 and vector S1-S2: Rotate about Y by beta until S0-S1 lies in the YZ plane Rotate about X by gamma until S0-S1 coincides with +Z Rotate about Z by delta until S1-S2 (...) (20 years ago, 7-Jan-05, to lugnet.cad.dev, FTX)
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| | Re: Mathematical assistance please
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(...) Ooooops, I see now I was totally barking up the wrong tree, you need to WORK OUT the alpha angle, sorry. But transforming the co-ordinate system should still work. ROSCO (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) Or maybe another way to look at it (got this from old lecture notes): Goal: rotate about arbitrary vector A by alpha Idea: we know how to rotate about X,Y,Z So, rotate about Y by beta until A lies in the YZ plane Then rotate about X by gamma (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) Could you transform the co-ordinate system so that one of it's axes is along the centre-line of the 4-4cyls (in the plane S0-S1-S2), rotate it about that axis so that the longest sise is in the plane, then transform the co-ord system back? (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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In lugnet.cad.dev, Ross Crawford wrote: <snip> (...) know how to come up with the rotation angle needed to twist the 4-4cyls.dat into the right position. One reason to push forward on my original solution is because the same knowledge can be used to (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) Hi Roscoe, Thanks for the help. If you extend the cylinders so that the outside edges touch, you will be able to see the overlap.... at small angles, this works because the overlap is small, but at larger angles, the overlap is noticable. I (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) It's hard work, but this page might help (URL) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) Hi Philo, Good to hear from you. My mistake.... I am using 4-4cyls.dat. rotating them to align them with the S0-S1-S2 plane is what I don't know how to do. Thanks, Kevin (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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(...) Why not just work out the longest side of the cylinder you need, and extend the hose segments by that much on each end? That would reduce the file size even more. BTW, if you do decide to go with your solution, and come up with a result, you (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Mathematical assistance please
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Hello Kevin, (...) What about using 4-4cyls primitives placed to the end of hose segments? Scale their length to (hose diameter)*tan(angle/2). See example for a 30° angle: (URL) and (URL) know, this is not a full solution, you need to rotate the (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Changing camera location in LPub
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Oh, of course! ROTSTEP! Thanks Kevin. --Ryan (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Mathematical assistance please
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Hi, I'm a much better arithmetician than mathemetician and have hit a wall with LSynth. In an attempt to reduce file size, I've written an algorithm that merges hose segments together (based on an angle error limit). This dramatically reduces file (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Changing camera location in LPub
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(...) Thanks! When rendering single images (entire model), the camera globe coordinates affect the rendered results. When rendering building instructions, MLCAD's ROTSTEP meta command controls camera location (or model rotation. Who can tell the (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Changing camera location in LPub
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I just downloaded LPub 2.2.0.1 — what a great program! — and I was wondering why changing the latitude or longitude of the camera doesn't affect camera location in the renderings. Is there something I'm overlooking? Thanks! --Ryan (...) (20 years ago, 6-Jan-05, to lugnet.cad.dev)
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| | Re: Flexible axles with lsynth
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Matt, The axle size is supposed to match the axle ends. Kevin (20 years ago, 6-Jan-05, to lugnet.cad, lugnet.cad.dev)
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| | Re: Flexible axles with lsynth
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(...) Thanks for your help Kevin, I've now got it working! I don't want to sound picky, but the axles pieces that have been created are just slightly larger in diameter than the LS40 part. Is this correct, or should the connected axle and end parts (...) (20 years ago, 5-Jan-05, to lugnet.cad, lugnet.cad.dev)
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| | Re: Flexible axles with lsynth
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(...) Hi Matt, LS40.dat is not a hose constraint (axle constraint). It is provided to you to put ends on your flexible axles. The second example you provide is the correct one. Simply add LS40.DAT on each end of the axle, and you have a complete (...) (20 years ago, 5-Jan-05, to lugnet.cad, lugnet.cad.dev)
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| | Re: Change to existing policy regarding the subfiling of dithered colors
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(...) Maybe. I think I was in the past and I wanted to go check that I wasn't, so I thought I'd post the link, just in case. (20 years ago, 4-Jan-05, to lugnet.cad.dev)
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