# How to modify the circle shape?

**URL:** <https://discourse.shapr3d.com/t/how-to-modify-the-circle-shape/10988>\
**Category:** Modeling Questions\
**Created:** [January 23, 2021, 10:20am UTC](https://discourse.shapr3d.com/t/how-to-modify-the-circle-shape/10988 "2021-01-23T10:20:16Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![key60529](https://avatars.discourse-cdn.com/v4/letter/k/e68b1a/32.png) [@key60529](https://discourse.shapr3d.com/u/key60529)\
**Post date:** [January 23, 2021, 10:20am UTC](https://discourse.shapr3d.com/t/how-to-modify-the-circle-shape/10988/1 "2021-01-23T10:20:16Z")

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Hello, I’m new to shapr3D, I would like to create a circle shape, but have more anchor so I could transform some of the anchor to create a shape like the image below …

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/7/7ddf8eb91f16b393713b7322fd53b54eb0ad80b4.jpeg)

but after some search, still can’t find a solution, may somebody could give me an advise?  
Thanks!

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**Author:** ![Yepher](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/yepher/32/8902_2.png) [@Yepher](https://discourse.shapr3d.com/u/Yepher)\
**Post date:** [January 23, 2021, 1:54pm UTC](https://discourse.shapr3d.com/t/how-to-modify-the-circle-shape/10988/2 "2021-01-23T13:54:22Z")

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Use “Spline” to make your shape. You can take a picture of your paper sketch there and then import into Shapr3D and trace it. I like to set the opacity of the picture pretty low so I can see through it when I do that.

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**Author:** ![key60529](https://avatars.discourse-cdn.com/v4/letter/k/e68b1a/32.png) [@key60529](https://discourse.shapr3d.com/u/key60529)\
**Post date:** [January 23, 2021, 2:09pm UTC](https://discourse.shapr3d.com/t/how-to-modify-the-circle-shape/10988/3 "2021-01-23T14:09:28Z")

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Hi @Yepher , thanks for reply.  
I know how to use Spline to create a 2D shape, but what I need to to create is like a circle, but actually, you could see the “wave” effect applied on the side.  
Sorry for my bad explanation, or is there any suggestion like video tutorial I could follow?

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**Author:** ![Yepher](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/yepher/32/8902_2.png) [@Yepher](https://discourse.shapr3d.com/u/Yepher)\
**Post date:** [January 23, 2021, 2:38pm UTC](https://discourse.shapr3d.com/t/how-to-modify-the-circle-shape/10988/4 "2021-01-23T14:38:36Z")

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I am sure I am misunderstanding what you need. But a circle is a “2D” shape too 🙂 But maybe what you mean is it can be extruded?. If you close a spline you can extrude it too. I

I will assume you want a “3D Circle” which is a sphere with a wave cut away. This is a quick video of one way to do that. I drew the wave with a spline, mirrored it, and then extrude it. Then just subtract the sphere and the shape to get the end result.

[![](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/2/f/2f8c2df9e1eb66baf2ae36b059b510427467480c.jpeg "RPReplay Final1611412421") ](https://www.youtube.com/watch?v=l9-Zri-xlug)

Or do you really mean a “circle” that is warped in the Z-axis? If so I don’t know how to do that. But you can approximate it with a 3D shape that is sliced thin. So the cross section of a cylinder. It would be essentially the same thing I demoed above.

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**Author:** ![Yepher](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/yepher/32/8902_2.png) [@Yepher](https://discourse.shapr3d.com/u/Yepher)\
**Post date:** [January 23, 2021, 2:51pm UTC](https://discourse.shapr3d.com/t/how-to-modify-the-circle-shape/10988/5 "2021-01-23T14:51:47Z")

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here is a sample project if you are looking for a “thin” circle warped in the Z-Axis

**Top View**

 ![IMG_1184](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/f/f58ef9e94012d48916d882fc141a206abf9ba1a1.png)

**45°ish view**

 ![IMG_1185.PNG](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/2X/8/88c614f6f50fb5305dd9e015253b95b6a763d5a0.jpeg)

**Project**

[shapr3d\_export\_2021-01-23\_08h48m.shapr](https://discourse.shapr3d.com/uploads/short-url/xYxRkOQGxLHnRmgXJzi6g1LRUDe.shapr) (144 KB)

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<div class="post-metadata">

**Author:** ![key60529](https://avatars.discourse-cdn.com/v4/letter/k/e68b1a/32.png) [@key60529](https://discourse.shapr3d.com/u/key60529)\
**Post date:** [January 23, 2021, 2:54pm UTC](https://discourse.shapr3d.com/t/how-to-modify-the-circle-shape/10988/6 "2021-01-23T14:54:58Z")

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Thanks again @Yepher , I guess this is exactly what I need 🙂  
Appreciate for your help!