Fast Steradian Intersection Correction

I just wanted to go back and mention that if the sum of the steradian angles is greater than 180 degrees, then due to the sine and cosine functions, the simple formula breaks down. However, we know that if the sum of the angles is greater than 180 degrees then by definition they intersect. Due to this, we should also store the steradian angle along with the angle sine and cosine.
So the revised intersection test algorithm becomes:

angle_a + angle_b > pi or dot(normal_a, normal_b) >= cos_a*cos_b - sin_a*sin_b

Not as pretty. A speedup for large coverages :-) but a slowdown for everything else... :-(