OK this was really dumb. I was trying to get an M50 plug printed and noticed that the BOSL calls I made created the bolt upside down making it hard to print. Rather than rotate 180 I took a "shortcut" (saved a few characters) and did scale([1,1,-1]). After printing it, I drove over to install and it would not start. I stared at it stupidly for a while before even realizing it had left handed threads and then was like wow, you can't count on BOSL to make the correct kind of threads!? Only after I was trying to find the "handedness" flag for version 2 did I realize that my inversion of course changed the handedness of the threads. So I brought this ignominy on myself! GRRR Don't do it kids!

https://preview.redd.it/2ovyzpxhms1h1.png?width=1920&format=png&auto=webp&s=29120880d1b8afea68e9d03061efc14f0c0f3b40

I have a module within a program that defines a slot in a phone case. Depending on which side of the phone case is being specified, the idea is to move / rotate the block that will be subtracted to create the hole. eg, creating a hole for the charging port. I thought the easiest way would be to have the rotate and translate commands executed having first set the translate and rotate parameters depending on which side of the phone case is applicable. However, I'm getting messages that the variables aren't actually defined - Why could this be? Is it because they're implicitly declared within an 'if' statement each time?

Edit: can I just say that I'm extremely appreciative of all the high quality and helpful responses.

I have a solid object with unique curves that needs to be become hollow, with equal thickness walls throughout.

Think of it as taking a solid chocolate Bunny and making it the cheap hollow bunny.

I tried doing a difference of scaled object, but that just doesn't work for keeping uniform walls of curved surfaces.

I tried fiddling with minkowski but ended up with errors that are outside of my comprehension:

~~~

ERROR: Nef minkoswki operation failed: CGAL ERROR: assertion violation!

Expr: sf_old->mark()

~~~

Is there a simple waying of doing this on recent builds?

HI I am looking for freelancer who can do basic openscad for me like custom name desk organiser with, piggy bank name desk something like custom gifting options

I am a person with a disability, with a neuromuscular disease. I use a Tobii (eye-tracking mouse) and I have a 3D printer. Unlike other software that requires physical movement, I can use my eyes to use OpenSCAD. However, I know nothing about programming. How can I learn OpenSCAD? I see little information about OpenSCAD on YouTube, unlike FreeCAD. Could someone please guide me?