[Therion] Help with a flowstone symbol for ASF.

[Stacho Mudrak]

> The above are compiled into the therion executable in some way so that
> therion knows about those area symbols. If I want to override one of the
> above area symbols with my own metapost code I can do that by including
> the metapost code in thconfig.

Yes, you can override only existing symbols.

> But if the area symbol is not in the list above I can't just create
> metapost code for say "a_something_ASF" as therion will not know about
> it even if it's in thconfig.
> 
> Is that right?

Well, symbol types/subtypes are in fact defined in 
thpoint/thline/tharea.h/.cxx files. In metapost files, there is only 
their visualization defined, therefore it does not help to define only 
new metapost symbols.

> PS. It does not worry me if there is no option in xtherion GUI for selecting
> say an area 'flowstone' if I have an a_flowstone_ASF, as I can select say clay for an area and then edit
> the th2 file file with vim and change clay to flowstone.

Soon we would like to add some generic point/line/area symbols, that 
could be used in cases, when desired symbol does not exists in therion.

Regards, S.