# Create curve tree interactively?

**URL:** <https://discourse.slicer.org/t/create-curve-tree-interactively/11955>\
**Category:** Development\
**Created:** [June 9, 2020, 2:28pm UTC](https://discourse.slicer.org/t/create-curve-tree-interactively/11955 "2020-06-09T14:28:56Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![hherhold](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hherhold/32/12199_2.png) [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Post date:** [June 9, 2020, 2:28pm UTC](https://discourse.slicer.org/t/create-curve-tree-interactively/11955/1 "2020-06-09T14:28:56Z")

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This question is probably specifically for Andras (@lassoan), but someone else might know how to do this.

Your video on centerline extraction and tree creation is awesome, but I was wondering if there is a way to interactively create a curve tree - meaning, make a hierarchy similar to the one shown in your video, but by hand by placing points interactively.

Thanks!!

-Hollister

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**Author:** ![hherhold](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hherhold/32/12199_2.png) [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Post date:** [June 9, 2020, 2:51pm UTC](https://discourse.slicer.org/t/create-curve-tree-interactively/11955/2 "2020-06-09T14:51:46Z")

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Never mind - I think I got it. Just needed another 10 mins or so playing with the UI.

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [June 9, 2020, 4:03pm UTC](https://discourse.slicer.org/t/create-curve-tree-interactively/11955/3 "2020-06-09T16:03:56Z")

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Note that you can also extract centerline for a simple straight segment using the built-in Extract skeleton module.

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**Author:** ![hherhold](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/hherhold/32/12199_2.png) [@hherhold](https://discourse.slicer.org/u/hherhold)\
**Post date:** [June 9, 2020, 4:10pm UTC](https://discourse.slicer.org/t/create-curve-tree-interactively/11955/4 "2020-06-09T16:10:04Z")

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Gotcha. Thanks!

-Hollister