(Note: this article was originally written in and transcribed to WordPress, so forgive the equation alignment. Get the original). If you have a line and an ellipse, how can you tell where they intersect? This is a relatively simple problem that has worked-out examples all over the web if you Google for “line ellipse intersection”. However, what I’ve come to find is that nobody will actually *give* you the solution for an *arbitrary* line and an *arbitrary* ellipse. I’m here to do just that. (more…)