UPDATE:  To save scrolling all the way through this thread, here is the latest version of my LDraw Torus Generator, converted to a web page and hosted on the Google Cloud Platform:  http://ldtorgen.appspot.com/

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I've been using 3D arrows for a while in the instructions I create, assembling the components from LDraw primitives.  Recently I've wanted to create curved arrows, but I've found there aren't enough existing LDraw torus primitives to give me the fine control over the major and minor radii that I need.  And there are even fewer high-definition torus primitives--necessary to create smoothly-curved arrows when rendering with POV-Ray. 

I built a simple spreadsheet to generate the specific torus sections I needed, then generalized it to make it more useful.  I've uploaded the spreadsheet to Google Docs so that anyone can use it.  It generates the quadrilaterals and all conditional lines for each section.  

LDraw Torus Generator


Simply enter the number of sections in a full torus (LDraw uses 16 for low-def and 48 for high-def), the major radius (the radius of the full torus), and the minor radius (radius of a cross-section) in the green cells.  The spreadsheet generates a complete .dat file with a file name consistent with the LDraw torus naming standard.  Then copy the blue cells to a file in your LDraw directory or a new model in your MPD file.

The torus segments are generated with 16-sided cross sections aligned for compatibility with existing disc and edge primitives.  This has provided sufficient resolution for my purposes, even with POV-Ray rendering.  I may expand to include 48-sided cross sections in the next iteration.

To generate a complete arrow, you will need to copy and rotate the torus segment to build the desired arc, then add a cone, two discs, and three circles of edges.  

   

I'd appreciate any feedback or recommendations for improvements.

Thank you.


Kevin

Hello, everyone.
Yesterday I saw a post about Lego simple machinery, and in fact I needed some parts about Lego 45002. This is a list of parts I find first, and who can help me make these parts. Of course I know it will be a huge amount of work, and if you want, I can make it with building blocks. However, I need some tutorials on the network, because of the differences in language, I understand more slowly.

https://brickset.com/parts/design-71981
https://brickset.com/parts/6182721/duplo...ew-6x6x2-5
https://brickset.com/parts/6073604/duplo...er-cockpit
https://brickset.com/parts/design-2214
https://brickset.com/parts/design-99565
https://brickset.com/parts/design-76057
https://brickset.com/parts/design-44970
https://brickset.com/parts/design-60535
https://brickset.com/parts/design-2206
https://brickset.com/parts/design-76395
https://brickset.com/parts/design-17215
https://brickset.com/parts/design-42029
https://brickset.com/parts/design-45146
https://brickset.com/parts/design-89465
https://brickset.com/parts/design-74957
https://brickset.com/parts/design-28336
https://brickset.com/parts/design-28336
https://brickset.com/parts/design-28336

When I download a parts, why only display half or not?

Hello Everyone!
This is my first model, so it is not perfect, I am aware that there are some flaws that I hope I will be able to correct in the future.

Attached Files

  6601-1 - Ice Cream Cart.mpd (Size: 3.16 KB / Downloads: 12)

With the advent of LDPE is LDDP still relevant? I've had a bug to start development again but if LDPE has completely supplanted LDDP functionality then I'll redirect my effort to other LDraw related projects.

Hey all!

Anybody willing to make the stickers of set 10188? I'm working on instructions (yes, instructions) for someone's ~16K piece Star Wars model and it uses these stickers. 
It's not a must to include them, but it would be so great to add them.

As a sidenote, the stickersheet of 10188 is very similar to the one of 75159.

Hi gang,
  Nice forums!  My complements to the folks who keep LDraw.org vibrant!

  Which renderers support texture mapping?
Thanks,
Kevin

It would be super cool if someone could make the following Star Wars pattern :
75902pb07 on Bricklink and 75902pr0007 on Rebrickable.

To my surprise part 92738 isn't available in LDraw. Or, at least I couldn't find it (is it under another number maybe?).
There's a version on digital-bricks.de that I can use, but it would be cool if someone could make a proper LDraw part of it. 

Thanks!

I can't find this part in mlcad . Who knows Who knows its network connection?

http://www.brickowl.com/catalog/lego-tra...ng-segment