# Rotating an Ellipsoid in Cesium

**URL:** https://community.cesium.com/t/rotating-an-ellipsoid-in-cesium/5481
**Category:** CesiumJS
**Created:** [May 4, 2017, 3:16pm UTC](https://community.cesium.com/t/rotating-an-ellipsoid-in-cesium/5481 "2017-05-04T15:16:11Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![msanders](https://avatars.discourse-cdn.com/v4/letter/m/9dc877/32.png) [@msanders](https://community.cesium.com/u/msanders)
#### Post date: [May 4, 2017, 3:16pm UTC](https://community.cesium.com/t/rotating-an-ellipsoid-in-cesium/5481/1 "2017-05-04T15:16:11Z")

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Hello,

I'm attempting to visualize the 1-sigma 3D covariance matrix for a spacecrafts' position in Cesium. I believe the appropriate way to do this is by using an ellipsoid object, which takes as its arguments the x, y, and z ellipsoid axis parameters. I have properly sized ellipsoid objects displaying, but now I need to rotate them in order to orient them correctly. I have a rotation matrix/quaternion to perform the rotation each ellipsoid I want to render, but I can't figure out how to rotate an ellipsoid objects.

So, my questions are: Is it possible to rotate an ellipsoid in Cesium using a rotation matrix/quaternion? If so, how is this done? If not, is there another way to properly visualize a covariance ellipsoid in Cesium?

Thanks,  
Matt

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### Author: ![CLBID](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/clbid/32/6058_2.png) [@CLBID](https://community.cesium.com/u/CLBID)
#### Post date: [October 4, 2021, 6:29pm UTC](https://community.cesium.com/t/rotating-an-ellipsoid-in-cesium/5481/2 "2021-10-04T18:29:40Z")

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Was there a resolution to this?