ENH: allow new patch names in subsetMesh (issue #1019)
Previously had 3 possibilities for handling exposed internal faces 1. use default "oldInternalFaces" 2. specify -patch, to use the specified (existing) patch 3. specify -patches, to use the geometrically closest patches Now relaxed the restriction on -patch to allow specification of a new (not yet existing) patch name. This improves flexibility, but won't catch typing mistakes. Harmonize behaviour of -patches and -patch. When -patches is used to specify a single, non-regex patch name, it now behaves identically to -patch. Since the getList handling for options already allows special treatment for single parameter lists, the following will work identically: subsetMesh -patch patch0 subsetMesh -patches patch0 subsetMesh -patches '( patch0 )' In the future it might be reasonable to fully combine the behaviour of '-patch' and '-patches' and treat them as aliases for each other. ENH: support subsetMesh on a cellZone. - when the '-zone' option is specified, the command argument is treated as the name (or names) of cellZones to be selected instead of as the name of the cellSet. The command argument can be a single word, regex, or list of word/regex. Eg, subsetMesh -zone -patch mypatch mixer subsetMesh -zone -patch mypatch '(mixer "moving.*" )' STYLE: simplify set handling and other code cleanup in subsetMesh
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