
    Pdk:n - drop facet if normal[k] &lt;= n (default 0.0)
    PDk:n - drop facet if normal[k] >= n
    Pg   - print good facets (needs 'QGn' or 'QVn')
    PFn  - keep facets whose area is at least n
    PG   - print neighbors of good facets
    PMn  - keep n facets with most merges
    Po   - force output.  If error, output neighborhood of facet
    Pp   - do not report precision problems

    .    - list of all options
    -    - one line descriptions of all options
</pre>

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