is there a way to create a custom polygon yet?

[kjjordans]

i would like to create a function to draw involute gears as a way of learning the software.

[se5a]

Simon Kirkby has done involute gears here:
https://plus.google.com/u/0/102374819221353547793/posts/6Fc2d2fPNxt
https://github.com/zignig/CoffeeSCad-examples/tree/master/applied/Involute

you can do 2d polygons, check the coffeescad Project->examples->geometry->2Dgeometry->basics
for an example of 2d custom polygons and basic extrusion. I think Simon is using that and twist extrusion - I guess we should put a twist example in there somewhere too, but for now check the gears to see how he's done it.