@bitbybit thanks! V2 JSCAD is definitely improving now.
I think several people are working with V2 libraries to create some 'custom' websites.
I'm also working on some reactive components for VUE. Hopefully, this will help people get moving faster.
https://github.com/z3dev/vue-components
There's just one issue... the 'core' package needs to be wrapped properly. I have some changes coming soon, but let us know if you hit some issues.
@BarbourSmith see the README. there are steps on how to setup and run the demo.
@Alasdair-McAndrew Hopefully someone will provide the code, but oblique cylinders can easily be created using extrudeLinear().
@BarbourSmith You keep asking the best questions. 
Actually, the new rendering engine for V2 JSCAD can render any design directly to a image (PNG) file. You will have to setup some scripts to automate the process.
https://github.com/jscad/OpenJSCAD.org/tree/V2/packages/utils/regl-renderer
@BarbourSmith there's an open issue about this as well.
@BarbourSmith well... let's call it a feature of V2.
colors should be added as the last step, after all operations are completed.
@Alasdair-McAndrew There's a little known feature of V2. After a design is rendered, just double click the design. The camera is adjusted to the size of the design.
@hrgdavor don't panic. i understand just fine. but i wanted to make sure that everything has been tried before making changes.
also, i'm not certain why 'exact' mouse position is important. i'm just fine working with V2, and don't find the inertia to be troublesome.
so, maybe this would be a user preference. no?
@Alasdair-McAndrew sure.
check out the recent post by @crysislinux
i haven't seen anyone embed V2 into a web page yet, but that will happen soon.
@hrgdavor you need to play with those settings some more.
I suggest that you crank up the rates, which drives the number of updates going into the rendering, i.e. rotateRate. Set this to something higher, like 30, 40, 50.
In addition, there's the speed of the rotation; rotateSpeed. This controls the movement between rotation updates. The max is 1.0, and will be extremely fast and uncontrollable. Somewhere between 0.010 and 0.001 will work the best.
It may be possible to allow users to control these values as well, and choose a rotation speed. Something like choosing the speed of the mouse.
@Alasdair-McAndrew super.
only the main web page is available as this time, demo.html. the other web pages have not been ported to V2 yet.
@teetopsy did you notice the error says 'cgs is not defined'? what is cgs?
@Cid-Zhang Wow. I strongly suggest using V1 of OpenJSCAD. The old old old version at joostn.gihub.io is not maintained.
@Alasdair-McAndrew Sorry. i forgot to provide the help page for installing V2 locally.
https://openjscad.org/dokuwiki/doku.php?id=early_v2
Please install as a normal 'user' account.
If you want to go further then please see the README file for the WEB UI. There should be some guidance on how to set up the WEB UI as part of a webserver.
@hrgdavor yup. there are some settings.
I think that you are working with a local version of V2. Just change the constants in this file.
packages/web/src/ui/views/viewer.js
And start the dev instance.
npm run dev
Let me know what works best.
I guess my other question about a progress bar in the viewer is either not possible, or too fiddly to be practicable?
This hasn't been requested before but some kind of progress indication should be possible.
Can you create a new issue for this?
@hrgdavor yup. thought that it might be 'rotate'. it feels a little sluggish at times.
@Alasdair-McAndrew here's some thoughts.
For a local installation of OpenJSCAD, be sure to run the following commands.
npm install
npm run bootstrap
This is true for both V1 and V2.
@BarbourSmith a very good question.
In V2, the best approach is to make a project folder. And then organize the parts as desired, including sub-directories.
project/
- index.js // this file is the entry point, and exports main
- tube.js
- subassembly/
- index.js
By the way, if the project works with the CLI, then the same project should work with the WEB UI as well.