# Locator shape of a transform

**URL:** <https://discourse.slicer.org/t/locator-shape-of-a-transform/3151>\
**Category:** Support\
**Tags:** surgical-navigation, openigtlink\
**Created:** [June 12, 2018, 2:03pm UTC](https://discourse.slicer.org/t/locator-shape-of-a-transform/3151 "2018-06-12T14:03:12Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![val.dil](https://avatars.discourse-cdn.com/v4/letter/v/6bbea6/32.png) [@val.dil](https://discourse.slicer.org/u/val.dil)\
**Post date:** [June 12, 2018, 2:03pm UTC](https://discourse.slicer.org/t/locator-shape-of-a-transform/3151/1 "2018-06-12T14:03:12Z")

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I’m using the OpenIGTlink extension to acquire a transform from a server in real time.  
In some picture I saw that the locator has a lite blu needle shape, but in my case it appears to me as a cube with 9 points, 8 on the edges and one in the centre that correspond to the position sent by the server.  
How can i change the shape of the locator into the lite blu needle one?

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**Author:** ![val.dil](https://avatars.discourse-cdn.com/v4/letter/v/6bbea6/32.png) [@val.dil](https://discourse.slicer.org/u/val.dil)\
**Post date:** [June 15, 2018, 3:30pm UTC](https://discourse.slicer.org/t/locator-shape-of-a-transform/3151/2 "2018-06-15T15:30:04Z")

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Sorry, maybe i was not completely clear.  
I want to change the way that the locator is visualized. Actually when i send a transform in real-time, this is tracked by a locator model that appears to me as a cube.  
I would prefer another model for the locator, not the cubic one. There is a way to change it? Becuase i’m searching since one week but i found nothing.  
Thanks to who will reply.

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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 15, 2018, 4:35pm UTC](https://discourse.slicer.org/t/locator-shape-of-a-transform/3151/3 "2018-06-15T16:35:56Z")

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[SlicerIGT tutorials](http://www.slicerigt.org/wp/user-tutorial/) explain in great detail how you can display tracked tools in Slicer. Tutorials also explain calibration of different tool types, usage of references, how to register patient/phantom images to the tracker’s coordinate system, etc.

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**Author:** ![val.dil](https://avatars.discourse-cdn.com/v4/letter/v/6bbea6/32.png) [@val.dil](https://discourse.slicer.org/u/val.dil)\
**Post date:** [June 16, 2018, 7:16pm UTC](https://discourse.slicer.org/t/locator-shape-of-a-transform/3151/4 "2018-06-16T19:16:28Z")

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Thank you so much, I had already saw that tutorials, but I missed the good one.