Easy way to make a spiral shape from spline

[Krypton]

Hi all,

Wondering if anyone knows of an easy way to create spiral paths with the splines programatically ?  
The spirals I'm thinking about is of these types.

https://www.google.co.th/search?q=spiral+animation&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjVtcfRtYvVAhWHQ48KHUjaA1gQ_AUIBigB&biw=1454&bih=802#tbm=isch&q=spiral+animation+in+code&imgrc=T5LUIl9W8Gk1jM:

Cheers

[_Aka_]

There is already a Spiral in the base Shapes of Curvy, but it has a constant radius, unlike what you seem to ask for.
Having a variable radius spiral would be a good addition to Curvy. I add it to the backlog.