skyleradams/tim-howard — pull request #1 by mprado21 (2014-12-03 22:12:39+00:00)
Title: Add zball

using fit() from matlab, zball = f(z_pixels, xball, yball), but we need to make it a function of only two variables.
I propose that alpha = atan2(yball, xball), and that will be a property of the zball coordinate.