[Therion] Forcing Therion to print centerlines only

[Bruce]

>If you put a survey in a map it will show the centreline...

 

Andrews suggestion is the only way I have done it to date, due to the
(generally helpful) behaviour of Therion whereby (for pdf exports) selecting
nothing selects all, and selecting any map object suppresses all selected
survey objects.

 

But it would be nice to be able to forcibly suppress scrap output, maybe
something like this in a layout would do it;

 

layout LayoutSurveyOnly

      symbol-hide group all 

      # hides all survey and scrap symbols except passage foreground and
background colours I think

      symbol-show group centreline #shows centreline related symbols

      debug station-names #shows all station names

      scale 1 1000

endlayout LayoutSurveyOnly

 

That layout in combination with no selections (which by default selects all
surveys and all scraps/maps in a source file) might do the trick.  

It worked for me, although it is slow to compile large projects due to
Therion having to process all the scraps. As written above the layout
generates centrelines with all the offsets and previews defined in maps, but
hides all other drawing symbols.

 

You can see below the effect on one of my projects.  The light grey shading
is the effect of the default white passage foreground colour overlying the
preview below shading.

 

Thanks for seeding the idea Michael

 

Bruce



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