From discussions in the parts tracker, I learned that there are different streams of how people like parts to be authored. The streams I identified so far are:
1. Use as many primitives as possible.
2. Make sure there are no manifold issues like t-junk.
3. Accept manifold issues if this leads to fewer faces.

Those streams often contradict each other because for instance using primitives often leads to manifold issues because even the most standard primitives like the studs bring them along. Placing a stud that is open on top of a box (as done for the most standard LDraw parts like 3001.dat) produces vertexes for the stud that are not connected to any vertexes of the box at all.

As such I was wondering whether it would make sense to be able to automatically generate parts from CAD files, such that I can use the full power of the CAD system, which could make sure to produce a manifold structure. This structure can then automatically be converted and we would receive a part that has a perfect manifold structure and as such should not cause any rendering issues.

The downside of this approach is that those automatically generated parts would not use any primitives at all.

If you are interested in the approach, feel free to have a look at https://github.com/schiele/stl2ldraw, which currently is an early working prototype.

This includes an example of part 3001 in https://github.com/schiele/stl2ldraw/blo.../test.scad, which gets translated into an STL file by OpenSCAD. In the next step, the tool translates this into an LDraw dat file.

The tool currently has the following features:
- Reads binary and ascii STL files.
- Merges very close vertexes that would not produce visual differences but might cause non-manifold structures.
- Warns about incorrect normal vectors in the STL files and corrects them.
- Warns about detected non-manifold structures but does not correct them:
  - degenerated faces (faces spanning no area, meaning all points on one line)
  - open edges
  - ambiguous edges
- Merges adjacent triangles on the same plane to convex quadrilaterals.
- Generates lines for sharp edges (more than 25 degrees angle) and open edges.
- Generates optional lines for soft convex edges (less than 25 degrees angle). For concave edges, they are not generated since they would never be visible by their concave nature anyway.

I do welcome your feedback and suggestions.

Hello,
while making the stickers of the 75887 set I ran into this problem: applying a sticker to a flexible part.

I thought I'd do it like in the attached files, but I can't load part 62698k03dy0.

Is my idea wrong?
Do I call the sticker from within files 62698-f1dy0 and 62698-f2dY0 without applying it to the flexible part?

Massimo

Attached Files

  62698-f2dy0.dat (Size: 629 bytes / Downloads: 4)
  62698k03dy0.dat (Size: 514 bytes / Downloads: 4)
  62698-f1dy0.dat (Size: 574 bytes / Downloads: 4)

I'm shooting to get 2024-02 out next weekend (3/24-3/24). Get your reviews in. 

I'd really like to get all the primitive updates out with this update but, failing that, at least the rings.

If this body wear part could be modeled, I would be so grateful! 

https://www.bricklink.com/v2/catalog/cat...conly%22:0}


  =.png (Size: 153.05 KB / Downloads: 63)

Came across these and got to point them out

Personally like that one if posible:
this one is listed on digital bricks but no 3d dat
https://www.bricklink.com/v2/catalog/cat...3#T=C&C=69



there is more if interested:


this one is listed on digital bricks but no 3d dat
https://www.bricklink.com/v2/catalog/cat...1#T=C&C=39

https://www.bricklink.com/v2/catalog/cat...8#T=C&C=59

https://www.bricklink.com/v2/catalog/cat...4#T=C&C=15

https://www.bricklink.com/v2/catalog/cat...2#T=C&C=59

https://www.bricklink.com/v2/catalog/cat...1#T=C&C=11

https://www.bricklink.com/v2/catalog/cat...#T=C&C=115

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Comes in these colours:
https://www.bricklink.com/v2/catalog/cat...#T=C&C=115
https://www.bricklink.com/v2/catalog/cat...3#T=C&C=11

Would be good for the part library to go with the other swords.

Might anyone have it available in obj format in addition?

I will use this thread for posts about my work on the Sesame Street minifigs. 

First of all. Does anyone own the set? And are you willing to take some photos of the inside of the heads so I can examine the molding?

I'd love to get these wings modeled!

https://www.bricklink.com/v2/catalog/cat...conly%22:0}

Attached Files

  69948pb01.png (Size: 134.69 KB / Downloads: 78)