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Magne Sjaastad
ad0f5f1bce
The loop was declared with an ordered clause, but the body contains no ordered region, so the clause only enabled the ordered scheduling machinery without providing any ordering. The intended deterministic vertex order was not achieved either, because the actual synchronization was a critical section, which does not preserve iteration order. Collect vertices in per thread buffers and merge them in thread order after the parallel region, following the pattern already used in RivFaultGeometryGenerator. This removes a lock acquisition per triangle in the innermost polygon loop, and makes the generated geometry identical from run to run.