In the projection, some triangles are rather spread out, and some are even going to cross from -Infinity to +Infinity. I didn't want to handle that wrap-around-

In the projection, some triangles are rather spread out, and some are even going to cross from -Infinity to +Infinity. I didn't want to handle that wrap-around-infinity case and thought it'd be easier to calculate them on the sphere instead of on the projection.