DRC对圆形的图形如何检查宽度？(2)

2. Otherwise, measure A and Bby using the Opposite metric; however, do not perform the special treatment forexactly one non-orthogonal edge, as is done with the Opposite metric. Do notdiscard the output if the measurement was non-commutative, as is done with theOpposite metric. This step can result in zero, one, or two outputs from each edge.
3. Discard all trivial outputedges. Because of properties within the Opposite metric, there can be at mostone output edge from each input edge (even for interval constraints).
4. Quit with no output if,after discarding trivial edges, there is no output from A and no output from B.Otherwise, name the resulting output edges OA and OB. Note that either OA or OBmay be non-existent.
5. Project edge OA, if itexists, onto B, which forms a segment PB. Project edge OB, if it exists, ontoA, which forms a segment PA. Discard either PA or PB if they are a result of round-offerror.
6. Produce the output of edgeA, which is OA PA. Produce the output from edge B, which is OB PB.