It's been a long time, but here is the writeup https://blog.chatfield.io/simple-method-for-distance-to-ellipse/ https://blog.chatfield.io/simple-method-for-dist

It's been a long time, but here is the writeup https://blog.chatfield.io/simple-method-for-distance-to-ellipse/ https://blog.chatfield.io/simple-method-for-distance-to-elli...