Hello,
First of all, thank you for taking the time to put this forum up.

Here's what I use JSCAD for,

@jamesnewton Indeed it is not that critical, it won't be bad to have already answered questions on the previous forum asked again here, so up to date answers could be provided. By the way those who have jscad knowledge/experience to share can make a post to show what they do, put some code.

finished

Hello, I'm using JSCAD for years now to help me build cardboard objects, statues and furniture. I decided at the beginning of this year to build a website offering users to do the same. My crafts need essentially 2d patterns to cut, fold and glue. I used last V1 version that I embedded in my website, and replace viewer-minimal.html with some custom html allowing the user to first choose a 3d model (from a .jscad script, a .stl file, or a .obj file), then one of my crafting scripts that runs on the chosen 3d model. User configures the craft as needed, then run its 2d mode that renders 2d data. Last, user click on "Créer PDF" (create PDF) that uses the 2d data and make a .PDF file. It works fine and not only on pc (I use Ubuntu/Firefox) but also on tablet (Android).

You can use it here : https://gilboonet.github.io/OpenJSCAD.org/packages/web/scripts.html
There are some example models on "(Charger volume)".

"Depliage" script takes lot of time to render and it can take advantage of colored zones (materials) from a .obj file.

code is here (but beware I'm not an IT pro) https://github.com/gilboonet/gilboonet.github.io/tree/master/OpenJSCAD.org/packages/web see scripts.html and dist/scripts.js )

Hello, I cannot help with react as I don't use it. Did you take a look at viewer-minimal.html (https://github.com/jscad/OpenJSCAD.org/blob/master/packages/web/viewer-minimal.html) ? It was my starting point to integrate jscad into web pages.

Hello, it can be done like that, put a "#" after openJSCAD.org then the url of your script.
https://openjscad.org/#https://raw.githubusercontent.com/gilboonet/designs/master/make_pattern.jscad

Hello, today I needed to make a surface of revolution model, usually I first draw a profil (with Openscad Polygon Editor) then uses jscad.

I did it with V1 (magenta) and V2 (orange). The V2 model is neat, where the V1 model has some faces that I usually need to change by hand in order to extract the pattern I need Once again, this is very good job..

Hello, as on my workflow I'm using obj files where I have groups (facets) that I colored, I was wondering if it could be done with jcsad 2. I didn't realize that immediately, but obj require handle groups by creating an array instead of a sole polyhedron, so it was not hard to do. For the moment I read the groups colors by hand, but they are into the companion file .mtl and could be fetched (I suppose it's for each group on 'kd' entry. Anyway that's already very nice.

const jscad = require('@jscad/modeling')
const { colors } = jscad
const { colorize } = colors

//const obj = require('./Gargouille692.obj')
const obj = require('./6ZonesMat.obj')

const main = () => {
  let cols = [
  [0,153,0],
  [0,153,255],
  [153,214,255],
  [163,102,0],
  [163,254,102],
  [254,204,255],
  [255,255,1]
  ].map(x=> x.map(y => y/255))
  
  let r = obj.map((x, index)=> colorize(cols[index], x))
  
  return r
}

module.exports = { main }

I'm trying now csg on a .obj file imported (require) into V2. It works fine with an intersect, but when I try to make lots of intersect, the return statement has errors.

On my example, height is 104 units, I can return a slice every 3 units, but when I try to return a slice every 2 units (and my real process needs smaller slices) it bugs :

elapse for solid generation: 39 design.js
total time for design regeneration 7015 17 design.js
Uncaught (in promise) TypeError: a is undefined (2 times)

@z3dev Indeed, for those examples I didn't use serializer but import data from obj files exported to .jscad format by Wings 3d. When imported on V2 using require (I suppose that's the way to use serializer), it's visually correct. I will try to do some csg to see if it ok. Anyway, here are the files.
https://github.com/gilboonet/gilboonet.github.io/blob/master/demos/objs.zip

@z3dev The same data applied to V2 gives the same results, the visually correct polyhedra are those having faces order reversed.

@sheffieldnick As V2 is on active development, I don't think that new functionality could be add to V1, but I'm only a user not a developer. This project could maybe help you :
https://github.com/danmarshall/jscad-gallery
Or you could also do a fork. Long ago, I added some functionalities to OpenJSCAD v0.5 so the user can select a data file that will load openJSCAD with a .jscad file and populate it with parameters, but it's very old code (from 2016) that's not on github... http://gilboo.carton.free.fr/OJSC5/edit_ner2.html

@z3dev I'm making some tests, apparently, with V1 specifying orientation doesn't correct the issue. With two differents obj files, I tried 4 kinds of polyhedron :

• orientation 'inward', faces order unchanged
• orientation 'outward', faces order unchanged
• orientation 'inward', faces order reversed
• orientation 'outward', faces order reversed

and the only ones that work (visually) are those with faces order reversed. I will try to do some CSG on them to see it deeper. And I will do the same with v2 asap, one thing I can say about v2 is that it measureArea returns 0 for 3d polygons, and work than I make them 2d.

Hello, as winding reversal for polygons having a negative area works in v2, I tried to do the same on the V1 scripts that I have on my website, but it isn't that easy.

I have a polyhedron with polygons having positive and negative areas, when reverse negative areas polygons, and display the volume, it has lots of missing faces , and surprisingly if I negate all polygons, it is correctly displayed. Maybe is my measureArea function wrong ? I took if from csg.js and adapt it ( vertices.. [0] changes to vertices... .pos.x and so on). Seems that I'd better start to change my website to V2.

@sheffieldnick I don't remember that it handles data protocol, only used if with file names

Hello, it can be done like that, put a "#" after openJSCAD.org then the url of your script.
https://openjscad.org/#https://raw.githubusercontent.com/gilboonet/designs/master/make_pattern.jscad