# Markups roadmap - Plane fiducial

**URL:** <https://discourse.slicer.org/t/markups-roadmap-plane-fiducial/8150>\
**Category:** Development\
**Created:** [August 23, 2019, 9:09pm UTC](https://discourse.slicer.org/t/markups-roadmap-plane-fiducial/8150 "2019-08-23T21:09:36Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Sam\_Horvath](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sam_horvath/32/3092_2.png) [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Post date:** [August 23, 2019, 9:09pm UTC](https://discourse.slicer.org/t/markups-roadmap-plane-fiducial/8150/1 "2019-08-23T21:09:36Z")

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Hi all:

per the [roadmap](https://www.slicer.org/wiki/Documentation/Labs/Improving_Markups), we are planning to add a plane fiducial type. Two questions:

- Is this intended to go into Slicer core?
- Is anyone working on it yet?

I am trying to get the [Osteotomy Planner](https://github.com/KitwareMedical/OsteotomyPlanner) updated for current Slicer, and it (currently) includes its own version of a plane widget that needs to be replaced. If no one else is actively working on adding the plane fiducial to Slicer I will, but I wanted to make sure I wasn’t duplicating any in-progress work.

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [August 23, 2019, 11:49pm UTC](https://discourse.slicer.org/t/markups-roadmap-plane-fiducial/8150/2 "2019-08-23T23:49:31Z")

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I think the closest things done related to planes is [References are not preserved after imports · Issue #1010 · Slicer/Slicer · GitHub](https://github.com/Slicer/Slicer/pull/1010) which was prior to markups refactor, but includes work for a vtkMRMLMarkupsPlanesNode.cxx.

> [@New Annotation for Slicer - Splines and Planes](https://discourse.slicer.org/t/new-annotation-for-slicer-splines-and-planes/3951):
>
> Hi everyone, We have developed new annotation support for Slicer in the form of Splines and Planes. Here is a preview: Planes: Note: Planes annotation are only available in the 3D view Splines: These fulfill the needs we have for them, but I don’t think they could be considered “feature complete”. They don’t have a GUI to interact with them for example. Where do you think would be a good idea to share these so the community can have access to it ? As an extension ? Each…

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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:** [August 24, 2019, 3:44am UTC](https://discourse.slicer.org/t/markups-roadmap-plane-fiducial/8150/3 "2019-08-24T03:44:05Z")

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The plane widget could be implemented as a markups widget, as most of the infrastructure that would be needed for this feature is already available for markups.

> [@Sam\_Horvath](#):
>
> Is this intended to go into Slicer core?

Yes, it should definitely go into the Slicer core.

> [@Sam\_Horvath](#):
>
> Is anyone working on it yet?

I don’t think anyone is working on a plane widget right now.

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**Author:** ![Sam\_Horvath](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/sam_horvath/32/3092_2.png) [@Sam\_Horvath](https://discourse.slicer.org/u/Sam_Horvath)\
**Post date:** [August 26, 2019, 3:59pm UTC](https://discourse.slicer.org/t/markups-roadmap-plane-fiducial/8150/4 "2019-08-26T15:59:45Z")

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Great! I hope to get to this in the next week or so.

Sam