# Creating Drawings Based on the Sum of two Plane Drawings

**URL:** <https://discourse.shapr3d.com/t/creating-drawings-based-on-the-sum-of-two-plane-drawings/38678>\
**Category:** Modeling Questions\
**Created:** [July 8, 2025, 6:52am UTC](https://discourse.shapr3d.com/t/creating-drawings-based-on-the-sum-of-two-plane-drawings/38678 "2025-07-08T06:52:35Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![Hloeric](https://avatars.discourse-cdn.com/v4/letter/h/e47c2d/32.png) [@Hloeric](https://discourse.shapr3d.com/u/Hloeric)\
**Post date:** [July 8, 2025, 6:52am UTC](https://discourse.shapr3d.com/t/creating-drawings-based-on-the-sum-of-two-plane-drawings/38678/1 "2025-07-08T06:52:35Z")

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Hi All,

I design parts for motorsport and have been testing various CAD software and so far shapr3d is, for me, more intuitive to achieve what I need, apart from one thing I am struggling with.

On Onshape there is a feature called “Projected Curve”, this option you select the sketches on two different planes and Projected Curve will create a line in 3D space that is the Sum of those two drawings.

My question is how do i achieve the same thing in Shapr3d? As designing motorsport parts that are very flowing, I require a fix to this or will put the brakes on a current project until I find a way or software that works in this way.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/f/5/f5c0881923bef3a2e0bf30ae4b2e4db3b8e285fd.jpeg)

As in the image you can image a sum curve of the two drawings in 3D space that can then be used in a Loft.

Kind Regards,

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**Author:** ![Hloeric](https://avatars.discourse-cdn.com/v4/letter/h/e47c2d/32.png) [@Hloeric](https://discourse.shapr3d.com/u/Hloeric)\
**Post date:** [July 8, 2025, 6:58am UTC](https://discourse.shapr3d.com/t/creating-drawings-based-on-the-sum-of-two-plane-drawings/38678/2 "2025-07-08T06:58:50Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/f/c/fc61dee77b605be7ccd86b3d3698ee1a413d3414.jpeg)

This is what I am thinking about, for more clarity, thank you

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [July 8, 2025, 7:09am UTC](https://discourse.shapr3d.com/t/creating-drawings-based-on-the-sum-of-two-plane-drawings/38678/3 "2025-07-08T07:09:16Z")

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Try to extrude from both sketches and then make intersection. One of the edges will be the line you need.

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**Author:** ![Hloeric](https://avatars.discourse-cdn.com/v4/letter/h/e47c2d/32.png) [@Hloeric](https://discourse.shapr3d.com/u/Hloeric)\
**Post date:** [July 8, 2025, 7:20am UTC](https://discourse.shapr3d.com/t/creating-drawings-based-on-the-sum-of-two-plane-drawings/38678/4 "2025-07-08T07:20:28Z")

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Hi thanks for the response, once those are extruded and intersect, can i then delete the bodies and be left with just the intersection line that can be used in a loft?

Kind Regards, Chris

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [July 8, 2025, 7:22am UTC](https://discourse.shapr3d.com/t/creating-drawings-based-on-the-sum-of-two-plane-drawings/38678/5 "2025-07-08T07:22:07Z")

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> [@Hloeric](#):
>
> can i then delete the bodies and be left with just the intersection line

You can delete the result body after you’ll use it.

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<div class="post-metadata">

**Author:** ![Hloeric](https://avatars.discourse-cdn.com/v4/letter/h/e47c2d/32.png) [@Hloeric](https://discourse.shapr3d.com/u/Hloeric)\
**Post date:** [July 8, 2025, 7:24am UTC](https://discourse.shapr3d.com/t/creating-drawings-based-on-the-sum-of-two-plane-drawings/38678/6 "2025-07-08T07:24:00Z")

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Appologies, im new to Shapr3d. I have done as you explained, the blue line is the line i require to remain, how would you delete the body, but be left with this 3D line to use in a loft?

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/7/8/786a5188e9b30434f070987310cc0ee784e7a4d8.jpeg)

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<div class="post-metadata">

**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [July 8, 2025, 7:25am UTC](https://discourse.shapr3d.com/t/creating-drawings-based-on-the-sum-of-two-plane-drawings/38678/7 "2025-07-08T07:25:08Z")

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> [@Hloeric](#):
>
> but be left with this 3D line to use in a loft?

You can’t. Just use this edge where you need it. Then you can delete the body.

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<div class="post-metadata">

**Author:** ![Hloeric](https://avatars.discourse-cdn.com/v4/letter/h/e47c2d/32.png) [@Hloeric](https://discourse.shapr3d.com/u/Hloeric)\
**Post date:** [July 8, 2025, 7:28am UTC](https://discourse.shapr3d.com/t/creating-drawings-based-on-the-sum-of-two-plane-drawings/38678/8 "2025-07-08T07:28:52Z")

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Ahh okay, I understand, thank you. A good work around