Convert NEAR_ZERO() macro calls to NEAR_EQUAL() and EQUAL()
completed by: javamonn
BRL-CAD's math library provides two macros, NEAR_ZERO() and NEAR_EQUAL() that test whether a number is approximately "0" or whether two numbers are approximately equal to each other. The numbers are "approximately" zero or equal based on a specified tolerance value. We recently added new macros that simplify caller use, but they need to be propagated throughout the code. NEAR_ZERO() has existed for a LOT longer than NEAR_EQUAL() and EQUAL() so code needs to be updated.
This task involves going through and reviewing all calls to NEAR_ZERO() and for cases where there's a subtraction of two numbers occurring, the call gets converted to a NEAR_EQUAL() or EQUAL() comparison. It's only the latter if the tolerance is SMALL_FASTF and is undocumented. IF there is a comment nearby that mentions the tolerance, you're going to only convert it to NEAR_EQUAL() and retain the tolerance.
Submit your work as a single patch file against our latest SVN sources with all changes included. See http://brlcad.org/wiki/Deuces to get started and help making patches.