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Does the twin next traversal work for vertices that are on the boundary?


What would happen if mesh is not manifold?


How does one make sure h->twin->next does not lead to infinite loop? Do we have to force some halfedge direction rules?


Where does twin->next lead to if the twin is a boundary edge?


How would we used a list of set of half edges to algorithmically draw something? How would you efficiently iterate through the half edges to ensure the same edge being drawn repeatedly is minimized (is it even possible to avoid drawing all edges more than once)?