178dc73084
----- More improvements to boolean tools. The main change (although very little in code) is changing fuzzy comparisons of floating point values. For testing, a new define is added in intern/boolop/intern/BOP_MathUtils.h called VAR_EPSILON, which enables better comparisons. This is turned on by default; undefining it will revert to using the previous comparisons. The downside of these new comparisons is a loss in speed, but the resulting meshes are more likely to be manifold (although still not always). The other changes include speed improvements based on profiling results and fixes for the improper creation of triangular faces with only two vertices.