Fresnel zone / elongated ellipsoid visualisation of two points (path)

Hi,

Just wondering if anyone has done any Fresnel zone (and/or visualising a path between two points with an ellipsoid) visualisation and / or calculations? All ellips(oids) in Cesium are central point-based, and I’m trying to create a long, sleek ellipse/ellipsoid between two points (preferable with terrain clipping, or material depth checking?) but seem to struggle with this one. My google-foo is letting me down.

Has anyone done this? I’ve also looked high and low for 3D / terrain checking JS/TS libraries to no avail. Any hint would be appreciated.

Cheers,

Alex