Hello!
I have spent a few days mulling over this problem, but have made little progress.
Unfortunately, spherical trigonometry is not my strong point.
I hope you can help!
What I require is a function that given an input vector, will return the radius of a sphereoid at the point where the vector would intercept the spheroid's surface, assuming assuming that the given vector extends from the sphereoid's center.
![alt text][1]
[1]: /storage/temp/83825-example.png
I've explored numerous equations, but most only handle elliptical radii (and I struggle to combine the third direction), or give me results that fluctuate as the input vector is modified.
Any assistance is greatly appreciated! :)
**Thank you and be well!**
-S.
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