C axis milling cycles. Anyone written any?

Setting up a c axis with a turret milling spindle,  has anyone written any subroutines/cycles to make milling square/hex/oct/triangle shapes. 
such a cycle would have to take into account tool radius, distance from zero,width of shape (in respect to tool width). 
If not , looks like i have a bit of maths in front of me...
- I wrote a set of cycles 12+ years ago and uploaded them here that were for quick program creation (they calced tool change position etc for multiple tools) after changing jobs over the years etc, I looked it up and it seems that once uploaded the forum had corrupted them, I downloaded the mess and got them to work for the current machine i use. I probably should tidy them up and upload them again!.