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    Thread: Rounding Errors in primitives?
Post: RE: Rounding Errors in primitives?

Orion Pobursky Wrote: (2021-06-10, 17:59) -- Go for it with this caveat: We need to look at all the files that use the primitive(s) in question to ensure that they also don't need to be adjusted. --...
Lasse Deleuran Official File Specifications/Standards 23 1,334 2021-06-11, 8:02
    Thread: Rounding Errors in primitives?
Post: RE: Rounding Errors in primitives?

Travis Cobbs Wrote: (2021-06-06, 23:16) -- By doing it right and comparing. Compute the X and Z for the given angle using sin and cos and a radius of 1. Round each number to 4 decimal places. ...
Lasse Deleuran Official File Specifications/Standards 23 1,334 2021-06-10, 17:42
    Thread: Rounding Errors in primitives?
Post: RE: Rounding Errors in primitives?

Travis Cobbs Wrote: (2021-05-06, 18:48) -- I'm pretty sure that 1-4ring5.dat is wrong. -- But how can we figure out if it is wrong or not? I do not have access to the source code of PrimGen2, and I...
Lasse Deleuran Official File Specifications/Standards 23 1,334 2021-06-06, 11:49
    Thread: New OMR WebGL Render Engine
Post: RE: New OMR WebGL Render Engine

Michael Horvath Wrote: (2021-05-07, 8:06) -- Do any sites other than LDraw.org and Brickhub use this library? I don't have time to create buildings instructions right now, or I would use Brickhub. --...
Lasse Deleuran Website Suggestions/Requests/Discussion 31 10,368 2021-05-07, 10:26
    Thread: Rounding Errors in primitives?
Post: RE: Rounding Errors in primitives?

Magnus Forsberg Wrote: (2021-05-02, 19:45) -- (...) Your second example, is correct compaired to the official file, but your calculation is not. -- I want to learn how to perform the correct calcul...
Lasse Deleuran Official File Specifications/Standards 23 1,334 2021-05-05, 8:50
    Thread: Rounding Errors in primitives?
Post: RE: Rounding Errors in primitives?

Magnus Forsberg Wrote: (2021-05-03, 15:57) -- How do you want to continue? A have a set of the 11 mentioned ring and cone prims, ready for recycling. -- With official parts I have previously sent ...
Lasse Deleuran Official File Specifications/Standards 23 1,334 2021-05-05, 8:33
    Thread: Rounding Errors in primitives?
Post: RE: Rounding Errors in primitives?

Magnus Forsberg Wrote: (2021-04-29, 20:54) -- The file claims to be made using PrimGen2, but if I re-create a new version today, I get correct values. -- Then it seems like an open and shut case. ...
Lasse Deleuran Official File Specifications/Standards 23 1,334 2021-04-29, 21:44
    Thread: Rounding Errors in primitives?
Post: RE: Rounding Errors in primitives?

Travis Cobbs Wrote: (2021-04-29, 20:14) -- I would say that the part is incorrect, and all instances of that coordinate should be the same. -- It is easy for me to generate new primitives that have...
Lasse Deleuran Official File Specifications/Standards 23 1,334 2021-04-29, 20:48
    Thread: Rounding Errors in primitives?
Post: RE: Rounding Errors in primitives?

Travis Cobbs Wrote: (2021-04-29, 20:14) -- I would say that the part is incorrect, and all instances of that coordinate should be the same. -- I have now gone through all the official 4-4con[x].dat...
Lasse Deleuran Official File Specifications/Standards 23 1,334 2021-04-29, 20:43
    Thread: Rounding Errors in primitives?
Post: RE: Rounding Errors in primitives?

Thanks for the explanation! I am using this to improve the automated testing framework that I am currently working on. However. I have found an issue with 4-4con12.dat. The official file uses the fol...
Lasse Deleuran Official File Specifications/Standards 23 1,334 2021-04-29, 19:59
    Thread: Lego AI
Post: RE: Lego AI

Willy Tschager Wrote: (2021-04-16, 10:40) -- Hi Aaron, personally speaking I'm fine with the above but obviously it has to be discussed within the Steering Committee. However all files in the OMR ...
Lasse Deleuran General LDraw.org Discussion 10 820 2021-04-16, 19:57
    Thread: 3D Viewer work
Post: RE: 3D Viewer work

Orion Pobursky Wrote: (2021-01-09, 16:14) -- I'll try to have this update pushed to the live code soon. Last time I pulled from master, my code didn't play well and I still haven't gotten back to tro...
Lasse Deleuran Website Suggestions/Requests/Discussion 65 15,714 2021-01-09, 20:24
    Thread: 3D Viewer work
Post: RE: 3D Viewer work

Philippe Hurbain Wrote: (2021-01-08, 9:31) -- One little glitch: 3D viewer works fine on the texmapped wing https://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/98088p03.dat But it shows neither texma...
Lasse Deleuran Website Suggestions/Requests/Discussion 65 15,714 2021-01-09, 11:12
    Thread: 3D Viewer work
Post: RE: 3D Viewer work

Philippe Hurbain Wrote: (2021-01-08, 9:31) -- One little glitch: 3D viewer works fine on the texmapped wing https://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/98088p03.dat But it shows neither texmap...
Lasse Deleuran Website Suggestions/Requests/Discussion 65 15,714 2021-01-09, 9:42
    Thread: LDraw.org 2020-03 Parts Update Now Available
Post: RE: LDraw.org 2020-03 Parts Update Now Available

Magnus Forsberg Wrote: (2021-01-03, 13:23) -- 1) Thats a mistake. We have abandoned the 8.3 filenames. New ring primitives should use the whole word "ring" in their name. But we chose to not rename...
Lasse Deleuran LDraw.org Announcements 48 4,908 2021-01-03, 13:39
    Thread: LDraw.org 2020-03 Parts Update Now Available
Post: RE: LDraw.org 2020-03 Parts Update Now Available

I will join the choir and say amazing work to everyone involved. I have tried to contribute this time, so I have a good idea of just how massive this piece of work is! I have two questions regardin...
Lasse Deleuran LDraw.org Announcements 48 4,908 2021-01-02, 21:04
    Thread: Unit Test for Primitives
Post: Unit Test for Primitives

I have made automated tests for generated primitives. These are the ones described in LDraw Primitives Reference (https://www.ldraw.org/library/primref/) page. The purpose is primarily to find errors ...
Lasse Deleuran Parts Authoring 0 768 2020-11-09, 16:31
    Thread: cyli2.dat
Post: RE: cyli2.dat

N. W. Perry Wrote: (2020-11-03, 4:30) -- The other confusion is that the rule that is written—i.e., the official library spec—expressly says that conditional lines may not overlap, even in part. Howe...
Lasse Deleuran Parts Authoring 15 2,900 2020-11-03, 12:18
    Thread: cyli2.dat
Post: RE: cyli2.dat

Magnus Forsberg Wrote: (2020-11-02, 17:04) -- The first, and last, condline in a cyli have a controlpoint on the tangential plane to the cylinder. When 2 cyli primitives are placed next to eac...
Lasse Deleuran Parts Authoring 15 2,900 2020-11-02, 18:24
    Thread: cyli2.dat
Post: RE: cyli2.dat

While we are on the subject, there is another piece of information which I can't find for n-fcyli.dat: What is the logic behind placement of the control points for the outer-most conditional lines whe...
Lasse Deleuran Parts Authoring 15 2,900 2020-11-02, 16:00