I changed my obj importer code to make it work with obj without groups. Now I can start to colorize my models by code. And there's one nice thing about that : I can use that faces coloring to store a volume's unfold pattern.
Capture d’écran de 2022-03-26 21-48-08.png

@udif great question!

There are three main objects; geom3, geom2, and path2. You can create empty versions of these…

const a = geom3.create() const b = geom2.create() const c = path2.create()

@z3dev hi, yes, it can be found in Apple App Store if you search for "Rukkou". Or use this link directly on a Mac OS. Do let me know your feedbacks 🙂

For those wondering, @platypii is a new member of the development team. He’s already put together some super nice fixes. In addition, he never sleeps so things are moving along at light speed. 😎

So, please let him know if there’s something missing from JSCAD.

@mark-hahn super thanks!

There’s still a little wizardry going on here. But I’ll try this with VSCODE, and then ask a few more questions.

@gilboonet that is excellent, it may be possible later on to integrate that one with jscad or at least take your experience for ideas how to improve 2D use-cases in jscad.

@gilboonet yes, specification for sort functions is to

return zero if a==b return neg or positive number depending if u want to sort ASC or DESC

@gilboonet I finally take advantage of geometries id and class preservation, and created a small js node script that creates a group for all paths having the same class, and at the same time I solve another annoyance that was the impossibility to search by numbers by creating id. That's very nice.

@z3dev You can also change the model, Venus has 1000 triangles and takes 30 sec. on my laptop to unfold (ubuntu with Firefox).

@gilboonet that is definitely something worth considering either as part of jscad or an addon library. I think we will have better idea after I have some time to cooperate with you on your project. It is definitely an interesting use-case, and a real project will give much needed insight on how to proceed with it.

@z3dev Sadly, lines already have a color (red for cuts, maroon for mountain fold and green for valley fold).
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@z3dev thanks. I think it makes most sense to use the tool to model objects that require parametric flexibility. I'd love to see basic configurable things modelled that people can adapt to their needs and export to STL for 3D printing using JSCAD or STEP when using OCCT. It's definitely not meant to be used as a Sculpting tool or a "hand drawing replacement" CAD.

I'm trying to keep general purpose nature to the tool as much as possible. Normalising various libraries to a common system. For example it helps sometimes to just have Verb NURBS curve or a surface as a backbone to place JSCAD meshes onto. Normalisation is still a bit of a challenge and my main goal, you still see way too many Draw components for different kinds of geometries. Just yesterday I coded a draw anything component that will replace all those (still need to release that) 😉

If you browse the examples you'll see that it's also possible to tie in some time based rules into the algorithms. In the future I'm hoping that it will become easier to code some robotic behaviours as I'm using BabylonJS to draw all the shapes and after CAD operations are applied BabylonJS can take over to do things like create GPU instances of meshes, animations, collision detection or apply realistic PBR materials and shadows.

I am also in the process of tying OCCT WASM kernel into the tool, which has a lot of potential to allow for bigger CAD models to be created. There I'm still experimenting with performance and what is possible, current OCCT API is a bit limited, but I'm working on extension 😉 My poor laptop really needs an update to push those limits.

@gilboonet it is nice to see a multilingual script 🙂