-/* This routine does not impose any minimum distances between columns; it only
- affects springs. As such, the FIXED variable does not refer to a minimum
- distance between columns, but instead to a minimum desired distance between
- columns -- this ends up affecting the stiffness of a spring. In fact, FIXED
- will be the distance between columns if there is a compression force of 1.0
- applied to the line. */
+/* We calculate three things here: the ideal distance, the minimum distance
+ (which is the distance at which collisions will occur) and the "fixed"
+ distance, which is the distance at which things start to look really bad.
+ We arrange things so that the fixed distance will be attained when the
+ line is compressed with a force of 1.0 */