# Revolve?

**URL:** <https://discourse.shapr3d.com/t/revolve/2957>\
**Category:** Modeling Questions\
**Created:** [September 29, 2018, 2:43am UTC](https://discourse.shapr3d.com/t/revolve/2957 "2018-09-29T02:43:03Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Tomasina](https://avatars.discourse-cdn.com/v4/letter/t/ecb155/32.png) [@Tomasina](https://discourse.shapr3d.com/u/Tomasina)\
**Post date:** [September 29, 2018, 2:43am UTC](https://discourse.shapr3d.com/t/revolve/2957/1 "2018-09-29T02:43:03Z")

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![B96E0869-ABFA-4946-BDDA-46555661C3FB](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/e/e436a0bfbca4dcbf2bc91e061807ff950216141f.jpeg)

How to revolve this ? Can’t seem to revolve it does it need to be a 2D shape ?  
Thanks

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**Author:** ![Tibi\_Shapr3D](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tibi_shapr3d/32/597_2.png) [@Tibi\_Shapr3D](https://discourse.shapr3d.com/u/Tibi_Shapr3D)\
**Post date:** [September 29, 2018, 6:13am UTC](https://discourse.shapr3d.com/t/revolve/2957/2 "2018-09-29T06:13:24Z")

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Hey!

The problem is that those 2 circles are tangent, meaning that revolving that face would create a non-manifold body, which is not allowed in Shapr3D.  
 ![tangent](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex002/uploads/shapr3d/original/2X/6/686346b193681c2b42662de03fc402e1e1cf07b8.jpeg)

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**Author:** ![Tomasina](https://avatars.discourse-cdn.com/v4/letter/t/ecb155/32.png) [@Tomasina](https://discourse.shapr3d.com/u/Tomasina)\
**Post date:** [September 29, 2018, 3:47pm UTC](https://discourse.shapr3d.com/t/revolve/2957/3 "2018-09-29T15:47:41Z")

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K thank you  
If I remove that, I can revolve it ?  
How do you define “non manifold body”  
Cheers 🙂

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**Author:** ![Tibi\_Shapr3D](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tibi_shapr3d/32/597_2.png) [@Tibi\_Shapr3D](https://discourse.shapr3d.com/u/Tibi_Shapr3D)\
**Post date:** [October 1, 2018, 8:16am UTC](https://discourse.shapr3d.com/t/revolve/2957/4 "2018-10-01T08:16:01Z")

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Yes, you should be able to revolve it than. I’ve created something similar and tried.

You can read more on non-manifold bodies [here](https://www.sculpteo.com/blog/2017/10/18/how-to-fix-non-manifold-geometry/).

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**Author:** ![tommyn](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tommyn/32/1714_2.png) [@tommyn](https://discourse.shapr3d.com/u/tommyn)\
**Post date:** [October 1, 2018, 2:51pm UTC](https://discourse.shapr3d.com/t/revolve/2957/5 "2018-10-01T14:51:17Z")

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Interesting write-up on non-manifold bodies, thanks.

It seems that outside pointing links are one way, that is I cannot get back to the Forum without closing Shapr completely and re-opening (on my iPad). Noticed this also on prior cases. Any thoughts on this?

Best,

Tommy

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**Author:** ![Tamas\_Shapr3D](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tamas_shapr3d/32/41_2.png) [@Tamas\_Shapr3D](https://discourse.shapr3d.com/u/Tamas_Shapr3D)\
**Post date:** [November 14, 2018, 4:13pm UTC](https://discourse.shapr3d.com/t/revolve/2957/6 "2018-11-14T16:13:31Z")

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thanks @tommyn for the observation and sorry for the late reply, it is indeed very annoying and we’ll look into this!