I hear people talking about and using concat() like it's the best thing since sliced bread. But it does not exist in my copy of OpenSCAD. How are people getting it? Do I have to build from scratch? I tried that, and ran into compilation issues on a Mac using the supplied scripts. Is there an OS X dev build binary somewhere? (the link from the downloads section of the web site 404s).
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What is the holdup with getting this into the release, even as a feature which needs enabling? I'm feeling rather embarrased that I've been publishing a lot of code using it and couldnt do without it. I use it extensively and have yet to hit any issues.
> What is the holdup with getting this into the release, even as a feature
> which needs enabling?
It’s a matter of making recursions more useful. As it is today, we hit resource limits way too fast. While this can be good enough for power users, I think it will be a source of endless frustration by others, even if it requires enabling it (since everyone who publishes such a model will include instructions on how to do so).
Some work has been done, and Oskar mentioned he’s got some optimizations coming up.