Is it possible to get a rotation matrix for a circular primitive, given a simple (I guess quadratic) Bézier curve?

All of our curved prims are circles or conical, and I’ve read that any affine transformation of a conic section will result in another conic section. If the simple Bézier curves are likewise conic (which may be a wrong assumption), then theoretically they can all be represented by a 2D shear matrix, right?

I found a bug in the release script of the PT. If the first lines after the header are TEXMAP lines, the !HISTORY line for the release after those TEXMAP metas. I've currently found 6 affected parts in the Official Library:

parts/36069ap01.dat
parts/36069bp01.dat
parts/98088p01.dat
parts/98088p02.dat
parts/98088p03.dat
parts/98088p04.dat


If you find any more, let me know.

Note: This does not affect any visible aspects of the part. The only problem is that the header is out of compliance with the Header Spec.

I'll track the down the source of the bug and recycle the affected parts for the 2022-06 release.

Hi, I'm using this part in a MOC that I want to digitize in LDraw format...
https://rebrickable.com/parts/3660pr0005...lot-print/
BrickLink 3660pb003 • BrickOwl 259299 • LDraw 3660pr0005 • LEGO 3660pr0005

Does anyone feel like tackling this? I don't know the procedure for getting printed parts added. It has an LDraw number, but nothing in the official or unofficial parts library that I can find.

Thanks
Bill

Good morning everyone!  I have one question and I haven't been able to find it in the forums.  What are the recommended settings for my Creality Ender 3 Pro?  I've seen settings on websites that recommend a 1.2mm wall thickness with 4 layers iirc but those bricks don't fit well together without sanding.  Any advice would be greatly appreciated on this.  Also, thank you to all for having such a fantastic community! 

-King04758

This is the thread for City sets released in 2007 (Fire, Traffic and more)

I've found the descriptions of these two parts 45677 and 52031 are inconsistent, while creating sticker shortcuts.
45677 Wedge  4 x  4 x  0.667 Curved
https://www.ldraw.org/parts/official-par...rtid=45677
52031 Slope Brick 45  4 x  6 x  0.667 Double Curved
https://www.ldraw.org/parts/official-par...rtid=52031

The top curvature and side tapers are exactly the same between the two, but only the width differs (4 stud wide vs 6 stud wide).
According to the file history, Chris made the change of description of 52031 in 2019 and not for 45677.
I think this change would be reasonable:
45677 Slope Brick 45  4 x  4 x  0.667 Double Curved

Moreover, as both of these parts have some substandard (lots of T-junctions, invalid condlines and upper-case references), they need to be reworked in near future. (including splitting top printable surfaces)

10307 - Eiffel Tower

The first brick is laid

       

June 1888.

Creator 2022

Minifigure Cape Cloth, Standard - Traditional Starched Fabric - 3.9cm Height

Item No: 522c  Alternate Item No: 20458, 73518

need the parts with formed.

  22517.png (Size: 132.22 KB / Downloads: 32)

I'd like to renumber all the "x" numbered parts currently on the PT (there are 3 of them) to "u" numbered parts.

Is there any reason why this shouldn't happen?