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| Inverse tang |
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Posted by: Peter Blomberg - 2025-07-24, 5:38 - Forum: Parts Authoring
- Replies (8)
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I've long struggled with parts that have two curved edges close to each other, but not having the same point of origin. The task is to fill in the area between the curves.
If the curves are far enough apart, I can use tndis and chords. However, if they are close, then I'd have to rotate chords and tndises, which isn't ideal.
Luckily, we have tang for the inside (in yellow). This eliminates the need to rotate ndises, but effectively doubles the number of points. If the inside and the outside of an area to be filled have significantly different number of points, then the result is a large amount of extremely narrow triangles, so this is to be avoided.
What if we had an inverse tang (in black) to be used for the outside? With an equal number of points, it is easy to fill the light gray area with quads.
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| Possible duplicate faces in some part files |
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Posted by: Alan Zhu - 2025-07-22, 1:29 - Forum: Parts Authoring
- Replies (4)
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Hi all,
I think I found some duplicate triangles and quads in some part files. Here are the ones I've managed to identify so far:
- Line 84 in 18922.dat
- Line 26 in 99781.dat
- Line 17 in 2630k02.dat
From what I can tell, removing these lines should have no effect on the geometry other than removing the duplicate faces.
I’m new to LDraw, so please let me know if I’m overlooking any conventions or reasons these might be intentional.
Thanks!
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| LDraw All-In-One-Installer 2025-02 v1 now available |
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Posted by: Willy Tschager - 2025-07-20, 9:22 - Forum: LDraw.org Announcements
- No Replies
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An updated version of the LDraw All-In-One-Installer, in short AIOI, containing the LDraw Parts Library Updates from 2025-02 to 2025-06.
The AIOI supports Windows XP (Home and Pro), Windows Vista or higher (all versions). There are two installer files available: Use the 64 Bit AIOI to install all the main 64 Bit programs, while the older 32 Bit programs are offered in a separated .exe file. Please note that only the 64 Bit version contains the LDraw Parts Library. If you want to use the 32 Bit programs, it is mandatory that the library has been installed previously. The Installer will NOT run on Windows 95, 98, ME, NT Ver 4, 2000, or XP below SP2.
It contains the following changes:
* Update to Parts Library 2025-06
* Update to MLCad.ini 2025-06
* Update to Offline Parts Catalog 2025-06
You can download the AIOI from:
LDraw.org >> Help >> Get Started >> Windows >> LDraw All-In-One-Installer
Many thanks to all the programmers who contributed to this release.
Willy Tschager
(LDraw.org Content Manager)
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