Auton

Depends on the size of the ellipse. I thought it might only be with odd numbered dimensions, but a quick test shows that it still affects some even numbered dimensions (14x16 for instance). That's a good point. I've never had that problem using the algorithm myself, perhaps it'd make sense to check for even numbered dimensions and then apply symmetry.

Hey everyone. First off I'd like to thank everyone involved in the development of Paint.NET for making such a great piece of software. You guys rock. However I do have a very nitpicky problem with the ellipse drawing algorithm: As you can see, circles often end up asymmetrical and discontinuous. This isn't noticeable at larger sizes, but can be important to people working with a smaller area (pixel artists for instance). I think the solution to this would be to implement some sort of octant-mirroring solution as described here. I've used this technique myself in a couple of small applications and it works great. Thanks!