How to compute/get the BoundingSphere or BoundingVolume of an Entity (e.g. model, point, etc)

CesiumJS
1

Hi,

I need to get the BoundingSphere or BoundingVolume of an Entity. How do I achieve this?

Ultimately, I need to check if an entity is within the Viewable bounds of the camera. I am looking at calling the CullingVolume.computeVisibility but I need to get the BoundingSphere of the entity itself. I am calling this to get the BoundingSphere but it seems to not work — new Cesium.BoundingSphere(entity.position, 0.0); — returns 0

Thanks,

Lionel