[Therion] Loop problem in extended elevation

Xavier Pennec Xavier.Pennec at inria.fr
Fri Aug 13 10:36:11 CEST 2021


Salut Chris,

Je pense que c'est le choix de la station ou la boucle est coupee qui 
est different.
Voir par exemple : https://therion.speleo.sk/wiki/breakingextend

A priori, il faudrait rajouter

extend ignore #station

pour que la coupe developpée soit coupée a l'endroit ou tu préfères dans 
chaque boucle.

On peut en parler au telephone si tu veux (mon tel 06 78 35 16 90)

Xavier



Le 12/08/2021 à 18:42, Christophe Salti via Therion a écrit :
> Hi all,
>
> Hope that someone will be able to help me during this summer vacation, 
> knowing that it's the perfect timing for exploring and surveying caves 
> (but also to do the synthesis of past surveys)...
>
> So, I'm working on an extended elevation map of a small but complex 
> cave in the South of France (+/- 1500m length & +20/-40m high). Survey 
> was done with a DistoX2 and Auriga (13 surveys were done if I remember 
> but I haven't attached all of these). Most of the cave is made of 
> boulders (énorme éboulis), probably from tectonic origin; so there are 
> plenty of loops (it's a nightmare) and at least 5 or 6 levels. I 
> haven't been working yet on the plan map but I guess it's not going to 
> be a piece of cake (from a loop point of view). Sketches were done by 
> hand to help me during the synthesis. I created an XVI file and I use 
> it as background image.
>
> I'm working on PC an my therion version is :
>
>
> So my problem is the following (screenshots below): station 3.2 is 
> unique but there are at least 2 side passages going to different 
> locations of the caves (see screenshots 1a & 1b). During the survey, 
> Auriga was displaying a unique 3.2 station and  different paths (one 
> going to 5.1, then 5.2 and the other one going to 3.11 then 3.16 and 
> so on; see screenshot 3 below). But when exported from Auriga into a 
> Therion format and then openned in Therion, I get two 3.2 shifted 
> stations (scale is 1m x 1m), one for each path, as seen in the 
> screenshot 2a.
>
> Screen shot #1a (sketch: cross section & plan views)
>
>
> _Screenshot 1b (sketch: cross section view)_:
>
>
>
> The 2 stations were surveyed at different times (but from the same 
> station/point as stated earlier).
>
> There are other stations with the same 'shift' problem (I'm only at 
> the begining of the synthesis process). For instance, station 5.2 
> -which comes just after 3.2- is also shifted as seen on the screen 
> shot #2b.
>
> Is there something wrong I did ? Something I should do instead?
>
> I've tried to "equate" stations 3.2 and 5.2 (I renamed them before 
> inserting the equate in the survey: first 3.2 in survey #1 is kept as 
> 3.2 but second 3.2 in survey #2 was renamed 3.2bis; same for 5.2). 
> Station was shifted/merged of course but I was not able to shift my 
> second 3.2 branch to the 1st one..
>
> I have checked the very usefull "Therion by example", by Marco Corvi, 
> in the /4.4.2 Loops in extended elevation/ paragraph but I was not 
> able to make it...
>
> Am I clear enough in my explanations?
>
> _Screenshot 2a below:_
>
>
>
> _Screenshot 2b below:_
>
>
> Why does Auriga is correctly displaying this sort of survey (see 
> screenshot #3 below) and not Therion, by default I mean ? I'm not 
> criticising, of course, it's just a remark from a beginner.
> -from station 3.2, there are 3 different paths going to 3.11, 5.1 and 3.3
> -from station 5.2, there are at least 2 different paths going to 5.47 
> & 5.3 (there are probably other ways I haven't check)
>
> _Screenshot #3 below:_
>
>
>
>
>
> _Screenshot #4 below_: full extended elevation screen as seen in Auriga
>
>
>
>
>
> Would someone be kind enough to explain me how to deal with it, 
> please? then i should be able to solve most of the others shift 
> problems I'll face during this synthesis...
>
> Cheers
>
> Christophe Salti
> Groupe Speleo de Vence
>
> ps: I've attached the therion files in case someone could help me...
>
> _______________________________________________
> Therion mailing list
> Therion at speleo.sk
> https://mailman.speleo.sk/listinfo/therion

-- 
> -------------------------
> Xavier Pennec
> Senior Research Scientist / Directeur de recherche
> Epione project-team, INRIA Sophia-Antipolis
> 2004 Route des Lucioles, BP93
> F-06902 Sophia-Antipolis Cedex, France
> +33 4 92 38 76 64
> +33 6 78 35 16 90
> https://team.inria.fr/epione/en/
> -------------------------------

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