# Intersection of curves

**URL:** <https://discourse.shapr3d.com/t/intersection-of-curves/9366>\
**Category:** Modeling Questions\
**Created:** [October 17, 2020, 6:07am UTC](https://discourse.shapr3d.com/t/intersection-of-curves/9366 "2020-10-17T06:07:23Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Tabycz](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tabycz/32/7708_2.png) [@Tabycz](https://discourse.shapr3d.com/u/Tabycz)\
**Post date:** [October 17, 2020, 6:07am UTC](https://discourse.shapr3d.com/t/intersection-of-curves/9366/1 "2020-10-17T06:07:23Z")

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Is there any possibility of intersection of curves (not bodies)?  
I have not found it. So. I tried intersection of bodies but I don’t know if I there is any tool for deleting sides of body what I don’t need.

Any suggestion, please?

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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:** [October 17, 2020, 7:50pm UTC](https://discourse.shapr3d.com/t/intersection-of-curves/9366/2 "2020-10-17T19:50:48Z")

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Hello,

I am not sure if you are looking for a tool for curves or bodies, please feel free to correct me if I misunderstood your question.

If two curves intersect in the same sketch Shapr3D notices it and the intersection becomes a snapping point.  
If you would like to delete a part of a body, you can do it with the Subtract tool. Just create a body that covers the side you would like to delete and hit subtract.

> **[What does the Subtract tool do?](https://support.shapr3d.com/hc/en-us/articles/115001414994-What-does-the-Subtract-tool-do-)**
>
> ⚠️ This tool is available to all users.
>  
> Subtract is one of the three Boolean functions in Shapr3D. Use it to remove bodies or groups from other bodies or groups.
> You can use the tool if you have ...

Let me know if I could help you

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**Author:** ![Tabycz](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tabycz/32/7708_2.png) [@Tabycz](https://discourse.shapr3d.com/u/Tabycz)\
**Post date:** [October 17, 2020, 8:01pm UTC](https://discourse.shapr3d.com/t/intersection-of-curves/9366/3 "2020-10-17T20:01:49Z")

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Thanks for answer but I mean something else.

Let me give you an example. I made a curve in plane xy and then another curve in plane xz. So. I have two curves and each one is in own plane.

Is there any tool what can do intersection of these two curves?

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**Author:** ![juhu031167](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/juhu031167/32/3901_2.png) [@juhu031167](https://discourse.shapr3d.com/u/juhu031167)\
**Post date:** [October 18, 2020, 6:59pm UTC](https://discourse.shapr3d.com/t/intersection-of-curves/9366/4 "2020-10-18T18:59:10Z")

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Shapr can only intersect bodies not curves. I do not understand very well what you want to do but intersecting outlines will not work. Maybe you want to send a sketch of what is your goal?

Best  
J

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**Author:** ![Tabycz](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tabycz/32/7708_2.png) [@Tabycz](https://discourse.shapr3d.com/u/Tabycz)\
**Post date:** [October 19, 2020, 5:36pm UTC](https://discourse.shapr3d.com/t/intersection-of-curves/9366/5 "2020-10-19T17:36:00Z")

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It’s a pitty. my goal is hull of ship where every line is 3D curve.  
I can use intersection of curves (3D curve) as rails for loft.  
Loft is great tool but it isn’t helpful without “rails” (for my hull shape).

If I could suggest any tip for improve work with bodies in Shapr3D. It would be rails for lofting. 😉

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**Author:** ![TPiatek360](https://avatars.discourse-cdn.com/v4/letter/t/db5fbb/32.png) [@TPiatek360](https://discourse.shapr3d.com/u/TPiatek360)\
**Post date:** [February 2, 2026, 1:41pm UTC](https://discourse.shapr3d.com/t/intersection-of-curves/9366/6 "2026-02-02T13:41:51Z")

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[This video](https://youtu.be/PriF9LC2GgI?si=b59pjFKh9r4rfNh6) summarizes it at around 2:40-4:00, I think - Autodesk and a few others support it - it’s a VERY handy feature for complex surface geometry.