# Creating a spiral inside a sphere

**URL:** <https://discourse.mcneel.com/t/creating-a-spiral-inside-a-sphere/1917>\
**Category:** Rhino for Windows\
**Created:** [August 27, 2013, 8:49pm UTC](https://discourse.mcneel.com/t/creating-a-spiral-inside-a-sphere/1917 "2013-08-27T20:49:51Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![John\_Brock](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/john_brock/32/476283_2.png) [@John\_Brock](https://discourse.mcneel.com/u/John_Brock)\
**Post date:** [August 27, 2013, 9:38pm UTC](https://discourse.mcneel.com/t/creating-a-spiral-inside-a-sphere/1917/3 "2013-08-27T21:38:02Z")

</div>

Try this:  
Draw a sphere.  
Use the Twist command with the axis on the ends of the seam.  
Set the Infinite option to Yes.  
Twist the sphere as many revolutions as you need.  
Turn off the deformed sphere’s isocurves.  
Duplicate the twisted seam to harvest the spiral curve.  
Perhaps replace the twisted sphere with an untwisted one.

I use 5 revolutions  
 ![](https://global.discourse-cdn.com/mcneel/uploads/default/original/3X/f/c/fc52166481b1c6b5d1df697800e8d46b59fbc351.jpg)

---

_[View the full topic](https://discourse.mcneel.com/t/creating-a-spiral-inside-a-sphere/1917)._