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Hein-Pieter van Braam
ccbb5923ac
In our previous attempts to fix the lightmapper we may have inadvertently introduced the same issue we were trying to fix. It appears that rand() will on some platforms introduce a mutex making it slower and on others may have a per-thread state that would need to be initialized with srand() on each thread. This slows down the lightbaking further. This sets up a separate rng state for each OpenMP thread by calling rand() only in the single-threaded part of the code. We then keep a vector of states. I believe this solves our problems.