In your allcaves.th

        centreline
                equate 2@first 1@second
        endcentreline

Henry

-----Original Message-----
From: Therion <therion-boun...@speleo.sk> On Behalf Of Tarquin Wilton-Jones via 
Therion
Sent: 13 April 2019 18:32
To: therion@speleo.sk
Cc: Tarquin Wilton-Jones
Subject: [Therion] Joining maps with the join command


[EXTERNAL EMAIL] 

Hi,

I am currently learning how to use Therion to draw up a detailed survey.

My survey is split into several "caves", each of which has its own .th and .th2 
file. In the .th file for each cave is a separate "map", so that the cave can 
be rendered separately.

cave1.th:
survey cave1
 input "cave1 plan.th2"
 input "cave1 ee.th2"
 map cave1MP
  scrap1
  scrap2
 endmap
 centreline
  ...
 endcentreline
endsurvey

cave2.th:
survey cave2
 input "cave2 plan.th2"
 input "cave2 ee.th2"
 map cave2MP
  scrapa
  scrapb
 endmap
 centreline
  ...
 endcentreline
endsurvey

Then I have an overall file which combines the maps called allcaves.th:
survey allcaves
 map allcavesMP
  cave1MP@cave1
  cave2MP@cave2
  join ____________
 endmap
 centreline
  ...
 endcentreline
endsurvey

Imagine the two caves join in scrap1 (id "foo":0) and scrapb (id "bar":end), 
and I want to use a join command to make the scraps join neatly (I have already 
positioned the passage ends very close to each other). Could you please tell me 
the syntax needed to make the join command reference the correct points of the 
correct lines inside the correct scraps inside the correct maps?

Every example of the "join" command I could find assumes you were trying to 
join scraps inside the same map, and did not show how to reference items in a 
sub-map. As a result, I have not been able to work out how to construct a valid 
join command for this situation.

Many thanks for any information you can provide.

Tarquin
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