# Spiral

**URL:** <https://discourse.shapr3d.com/t/spiral/1441>\
**Category:** Modeling Questions\
**Created:** [August 23, 2017, 7:31am UTC](https://discourse.shapr3d.com/t/spiral/1441 "2017-08-23T07:31:57Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![dotDash](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/dotdash/32/1170_2.png) [@dotDash](https://discourse.shapr3d.com/u/dotDash)\
**Post date:** [August 23, 2017, 11:33pm UTC](https://discourse.shapr3d.com/t/spiral/1441/2 "2017-08-23T23:33:58Z")

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Hi fonthill,

EDITED:  
This answer is for creating a helix, not a spiral.  
Sorry, my mistake…see my second post below

Shapr3d has an elegant method for creating helixs:

1. draw circle of desired radius
2. extruded circle to create cylinder
3. pick point at intersection of seam and circle  
and commence line on surface on one side of seam
4. without lifting pencil, cross over to opposite side of  
seam, to intersection of circle and seam at the other end of the cylinder.
5. delete cylinder.

It can be a bit finicky, but persistence will pay off.

Hopefully with further development, there will be means to pick end points of helix line for adjustment.  
And ideally an option for inputing the number of revolution of the helix (or alternatively: number of degrees i.e. 720 = 2 revolutions)

![spiral](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/7/790dd1c846b9cf5c724183ccfbf5ed81e35f407c.jpg)

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