16 Jun
2021
16 Jun
'21
10:29 p.m.
Full description on the wiki https://therion.speleo.sk/wiki/extend The second option that Tarquin describes is set out towards the bottom of that page.
Pretty sure the answer is "no", but... Can you do this in a thconfig: source "cave.th" source "extend1.th" where cave.th contains the cave survey data, and extend1.th contains the "extend" commands? I would imagine that to do it, you would need to re-enter the original survey, which is not permitted.