Tamito Kajiyama
2a5b6d9c8f
Problem report by Light BWK through personal communications, thanks a lot! Apparently there is something wrong in the way how edges are chained to create strokes. For some unknown reason, strokes may contain a very small line segment that proceeds in the opposite direction (e.g., downward even when adjacent stroke segments proceed upward), resulting in the reported visual artefact. This revision is intended to address the reported issue in most cases. The present solution is not a proper fix of the issue. Another code update with better understanding of the real cause is due in the future work.