Given is one "random" point on the ellipse, the eccentricity and the center of the ellipse. How can I calculate the semi-major axis?
I'm not very math-savvy, so I hope the problem is easy to solve. Thanks a lot.
Edit: In some cases the ellipse is rotated on the y-axis.
Edit 2: So thanks to Cadenza I can calculate the semi-major axis if the ellipse is in a 2D space but what can I do if the ellipse is in a 3D space and rotated on the y-axis?
On a german Q&A website somebody said that it's impossible with these given informations. Is that true? If yes which informations except the semi-minor axis could be helpful?