Schuyler Cohen

I needed this so I could modify corners through a calibration without having to rectify the entire image.

The documentation sets trns for an rgba image, which then fails when trying to decode with `FormatError { inner: ColorWithBadTrns(Rgba) }` from: https://github.com/image-rs/image-png/blob/master/src/decoder/stream.rs#L893

Set cos_critical_rad correctly

4

In QuadThresholds, the parameter min_opposite_angle was being used to directly set cos_critical_rad, but that's just a cached version of cos(critical_rad), not an entierly different parameter. This sets it to the...