[Therion] Big room multiple scraps - How to join

[Bruce Mutton]

Bill
As Tarquin points out, looks to me like scraps with openings wider than the
scrap is long.  The solution is invisible walls along the interior joins.
Another thing to check is that all the walls have the correct orientation -
all the left-side yellow ticks point to the interior of the passage (if not
for pdf outputs, it still helps for models).
And that wall -outline is set correctly to out, in or none.

Bruce

-----Original Message-----
From: Therion <therion-bounces at speleo.sk> On Behalf Of Bill Gee
Sent: Thursday, 3 August 2023 03:28
To: Therion Mail List <therion at speleo.sk>
Subject: [Therion] Big room multiple scraps - How to join

Hello everyone - I am having a problem getting Therion to understand how to
join several scraps to make a large room.  The working map is at

https://campercaver.net/MiscFiles/StarkCavernsNoCenter.pdf

Take a look at the east part of the map in an area called Grand Canyon. 
This is really one large room, though we did not realize that when we
started sketching several years ago.  Now I have at least three different
pieces of sketch to try and fit together.

As you can see, there is a large triangle in the center which Therion thinks
is not cave.  There are also some part which are outside the cave, but are
considered by Therion to be inside.

All of the joins in here are using line-to-line.  I named the lines, then
created "join" statements specifying the two lines and which points on those
lines to join.  Therion is happy with that, and the wall that it draws is a
fair depiction of the area.  The problem is that much of the interior is
getting lost.

I have not tried to use plain joins of the scraps - joins which do not
specify the lines.  I suspect that would not change much.

I have already drawn some of this area three times.  It is extraordinarily
complicated due to multiple levels, especially along the east side.  We
thought for a long time that the east side was separate passages, but it is
really just a complicated pile of big breakdown blocks.

I really REALLY do not want to go back and make one huge sketch of the
entire room.  That would take several days.

What can I do to convince Therion where the cave really is?  Can I put in
some invisible walls (subtype hidden)?

Thanks!

--
===============
Bill Gee
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