finished crack triangle filling routine
remove some repetitive code from math
fix a bug that was creating too many edges
remove trap
removed unfortunate debug code
reactivated everything
split edges into two parts. one with i1 < i2 and one with i2 > i1
added explicit use of csg node in iso. this prepare the work for hierarchical culling with bbox
replaced misuse of distance field evaluation instead of using the cache
fixed some warnings with GCC
fixed a sign bug in removeborder. added first simple code to handle bbox
remove use of operators for vector comparisons
use macros to declare compare functions
started to implement a edge cache to save computations on edges
fixed bbox for csg tests
added a cache for the edges
removed some debug code
get rid of grid structure. it is just useless and prevents from optimizing out these imul
cleaned indexing of all the arrays
more cleaning of DC