> Is there already a space in the wiki with shared symbols? 

 

https://therion.speleo.sk/wiki/metapost#general_symbol_examples

 

> BTW Therion already automatically substitutes symbols that are missing from 
> your chosen symbol set, with those from another.  

How does it work exactly? What is the list of symbol sets searched by Therion? 
In which order are they searched? I couldn't find references to this in Therion 
Book (in another quick search).

 

It is in the metapost code I think, not hard to find, but in a rush just now.

 

> You can set in your layout different substitutions if you do not like the 
> defaults. How?

 

For example…

  #CAVE APPEARANCE

  #---------------  

  symbol-set NZSS #if left as default, uses a variety of the following;

  # UIS, BCRA, NSS, ASF, CCNP, SKBB  

  

  #Adopt passage slope 'fat triangle arrows' in favour of default skinny arrows

  symbol-assign line gradient BCRA

  symbol-assign point gradient BCRA

  

  # symbol-assign area blocks AUT # this one is too dense

  symbol-assign line wall:blocks AUT  

  symbol-assign point blocks AUT

  

  symbol-assign area debris AUT   

  symbol-assign line wall:debris AUT  

  symbol-assign point debris AUT  

  

  # symbol-assign area sand AUT    

  symbol-assign line wall:sand AUT  

  symbol-assign point sand AUT   

 

Bruce

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