# How to draw a rod/pipe with a circular cross section from a square cross section along an arc?

**URL:** <https://discourse.shapr3d.com/t/how-to-draw-a-rod-pipe-with-a-circular-cross-section-from-a-square-cross-section-along-an-arc/30228>\
**Category:** Modeling Questions\
**Created:** [February 7, 2024, 1:29pm UTC](https://discourse.shapr3d.com/t/how-to-draw-a-rod-pipe-with-a-circular-cross-section-from-a-square-cross-section-along-an-arc/30228 "2024-02-07T13:29:20Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Tamas](https://avatars.discourse-cdn.com/v4/letter/t/71c47a/32.png) [@Tamas](https://discourse.shapr3d.com/u/Tamas)\
**Post date:** [February 7, 2024, 1:29pm UTC](https://discourse.shapr3d.com/t/how-to-draw-a-rod-pipe-with-a-circular-cross-section-from-a-square-cross-section-along-an-arc/30228/1 "2024-02-07T13:29:20Z")

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How to draw a rod/pipe with a circular cross section from a square cross section along an arc?

I would like to draw a pipe with a circular cross-section from a pipe with a square starting cross-section along a freely drawn arc. It’s like using the “Loft” and “Sweep” functions at the same time. I attached the photo. How can this be solved?

 ![IMG_1265](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/c/e/ce7ba91d6ca202800aed914e53f56e46553653c7.jpeg)

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**Author:** ![KPeter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/kpeter/32/7644_2.png) [@KPeter](https://discourse.shapr3d.com/u/KPeter)\
**Post date:** [February 7, 2024, 1:39pm UTC](https://discourse.shapr3d.com/t/how-to-draw-a-rod-pipe-with-a-circular-cross-section-from-a-square-cross-section-along-an-arc/30228/2 "2024-02-07T13:39:34Z")

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The Loft tool works with single cross-sections. Use it first to create your shape, and then apply the Shell tool on both ends to hollow it out like in the video below:

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**Author:** ![Tamas](https://avatars.discourse-cdn.com/v4/letter/t/71c47a/32.png) [@Tamas](https://discourse.shapr3d.com/u/Tamas)\
**Post date:** [February 7, 2024, 2:17pm UTC](https://discourse.shapr3d.com/t/how-to-draw-a-rod-pipe-with-a-circular-cross-section-from-a-square-cross-section-along-an-arc/30228/3 "2024-02-07T14:17:14Z")

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Thanks for the answer, but that wasn’t the question. Your solution works along a straight line. I want to get from the square to the circle along a freely drawn curve, as it was in my description and in the picture.

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**Author:** ![Stephen](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/stephen/32/16350_2.png) [@Stephen](https://discourse.shapr3d.com/u/Stephen)\
**Post date:** [February 7, 2024, 5:38pm UTC](https://discourse.shapr3d.com/t/how-to-draw-a-rod-pipe-with-a-circular-cross-section-from-a-square-cross-section-along-an-arc/30228/4 "2024-02-07T17:38:32Z")

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Guided Loft will do what you want. There’s plenty of topics on the forum with examples.

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**Author:** ![Tamas](https://avatars.discourse-cdn.com/v4/letter/t/71c47a/32.png) [@Tamas](https://discourse.shapr3d.com/u/Tamas)\
**Post date:** [February 7, 2024, 9:09pm UTC](https://discourse.shapr3d.com/t/how-to-draw-a-rod-pipe-with-a-circular-cross-section-from-a-square-cross-section-along-an-arc/30228/5 "2024-02-07T21:09:32Z")

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Thanks, I didn’t know about this feature. After that I read and managed to solve the problem.