[Therion] Help with a flowstone symbol for ASF.

[Stacho Mudrak]

I am sorry, "area flowstone" symbol is not yet supported, it is only in 
the TODO list :( This is main reason of your problems. OK, I will try to 
add it ASAP - it should be relatively easy.

But I expect, that with area flowstone, there is definitely some 
orientation needed. Am I correct? This will take some time - there is 
some GUI in xtherion needed and we had no oriented area until now.

Regards, S.

Mike Lake wrote:
> Hi all
> 
> I am trying to do a flowstone symbol for the ASF.
> In thconfig I have this:
> 
> layout mypage
>   scale 1 200
>   base-scale 1 100
>   symbol-set ASF
>   
>   code metapost
> 
>     beginpattern(pattern_flowstone_ASF);
>       pickup PenC;
>       draw (-.5u,.5u){dir -70} .. {dir 70}(.5u,.5u);
>       patternxstep(1.0u);
>       patternystep(0.5u);
>     endpattern;
>     
>     def a_flowstone_ASF (expr Path) =
>     T:=identity;
>     thclean Path;
>     thfill Path withpattern
>     pattern_flowstone_ASF; 
>     enddef;
>   
>   endcode
>   symbol-assign area flowstone ASF
> 
> endlayout
> 
> Im getting this errori when I run therion:
>   therion: error -- thconfig [76] -- thconfig [76] -- unknown symbol
>      specification -- area flowstone
> 
> 
> The pattern Im wanting is based on this 
>   draw (-.5u,.5u){dir -70} .. {dir 70}(.5u,.5u);
> which looks like this \__/
> 
> and what I would like to have is this:
> 
> \__/\__/\__/\__/\__/\__/\__/\__/
>   \__/\__/\__/\__/\__/\__/\__/\__/
> \__/\__/\__/\__/\__/\__/\__/\__/
>   \__/\__/\__/\__/\__/\__/\__/\__/
> 
> I see in the thArea.mp that some patterns are done using the mpattern
> package and use a beginpattern (e.g. pattern_water_UIS) while others seem to just use a for loop 
> (e.g. a_sand_UIS) and dont use the mpattern package.
> Should one use the mpattern macro over more complex mpost code if its
> suitable?
> 
> 
> Mike
>