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Stage 3

In the final stage, the individual OASIS files for each grid cell are combined, using the equivalence file, into a single OASIS file. There are two ways that nets that extend across grid boundaries can be handled. The ``easy'' way is to simply copy all net cells from all grid areas into the output. For the nets that connect to other nets, choose a ``primary'' subnet (cell). In this cell, instantiate the other net cells to which the primary subnet connects.

The alternative is to actually copy the subnet cell geometry into the primary cell. This format is easier to work with, but requires more time and memory to construct.

When the output file is written, the equivalence file and the Stage 1 OASIS files are deleted, and the operation is complete.

Stephen R. Whiteley 2017-11-08