Hi all, This is my first message on this list. I try to user therion with the linux version. I can generate a topo and a 3d model now with wiki help. But I have an issue with vertical and I don't find anything on the wiki or the mailing list archive to solve it. I try to realise a topo with vertical and on all vertical I have a figure there are nothing to do here. I will try to explain my trouble: If I put -90° or +90° I have a new rectangle on the result if I try with -89° the rectangle disappear. With -90° see the result at this address http://i.imgur.com/AinzN.png survey main -title "Test cave" survey first centreline data normal from to length compass clino left right up down P0 0 0.00 0.00 0.00 0.60 0.30 0.00 1.00 0 1 10.50 70.00 -66.00 1.00 0.50 1.00 3.50 1 2 7.50 70.00 -90.00 0.30 1.00 3.00 0.00 2 3 1.15 70.00 0.00 0.30 1.10 0.00 0.50 3 4 2.30 70.00 -34.00 0.00 1.50 1.50 1.25 4 5 1.00 70.00 -90.00 0.30 1.30 6.25 0.00 5 6 2.90 70.00 -1.00 0.60 1.00 1.00 2.00 endcentreline endsurvey endsurvey The same with -89° data normal from to length compass clino left right up down P0 0 0.00 0.00 0.00 0.60 0.30 0.00 1.00 0 1 10.50 70.00 -66.00 1.00 0.50 1.00 3.50 1 2 7.50 70.00 -89.00 0.30 1.00 3.00 0.00 2 3 1.15 70.00 0.00 0.30 1.10 0.00 0.50 3 4 2.30 70.00 -34.00 0.00 1.50 1.50 1.25 4 5 1.00 70.00 -89.00 0.30 1.30 6.25 0.00 5 6 2.90 70.00 -1.00 0.60 1.00 1.00 2.00 endcentreline endsurvey endsurvey I don't know if it is clear or not, I'm sorry for my english. Do you have any idear on what is wrong or what I don't undestand ? Regards, Laurent
Laurent Welcome to the list. As the gradient of a survey shot increases, therion switches from the assumption that passages are measured LRUD to an assumption that they are measured LR-front-back and then at 90 deg to NSEW. At present the user has some control of this, but not complete control.
From the therion book (and slightly rephrased by me)...
vthreshold <number> <units> threshold for interpreting LRUD readings as left-right-front-back reading perpendicular to the shot. If passeges are near horizontal (inclination < vthreshold), LR is perpendicular to the shot and UD is vertical. If passages are near vertical (inclination > vthreshold), UD becomes perpendicular to the shot - otherwise passages would not look very good. In the case of vertical shots, UD is interpreted as north-south dimension from the station to allow tube-like modelling of verticals. It is the feature in the last sentence which is upsetting your output. You may have noticed the recent posts discussing the merits or otherwise of this behaviour. I have never concerned myself much with this, as my focus is cartographed drawings, not models, so I just ignore the spurious 'walls' at pitches. Hence this advice might not be perfect. Try using 89.9 deg in place of 90 deg as a workaround. Incidentally, does anyone know what the default value of vthreshold is? Bruce
Hi Bruce, Thanks for your quick answer. In fact I found vthreshold threads, and I tested different values for that parameter without any change. It seems default value is -90 90 and it not possible to choose 91 or a wild cart. I will change every vertical values to 89.9 and I try to draw my cave. Is there any evolution plan on the todo list about this subject ? Laurent. Thanks developers for yours job. 2012/5/22 Bruce <bruce@tomo.co.nz>:
Laurent
Welcome to the list.
As the gradient of a survey shot increases, therion switches from the assumption that passages are measured LRUD to an assumption that they are measured LR-front-back and then at 90 deg to NSEW. At present the user has some control of this, but not complete control.
From the therion book (and slightly rephrased by me)...
vthreshold <number> <units> threshold for interpreting LRUD readings as left-right-front-back reading perpendicular to the shot.
If passeges are near horizontal (inclination < vthreshold), LR is perpendicular to the
shot and UD is vertical.
If passages are near vertical (inclination > vthreshold), UD becomes perpendicular to the shot – otherwise passages would not look very good.
In the case of vertical shots, UD is interpreted as north-south dimension from the station to allow tube-like modelling of verticals.
It is the feature in the last sentence which is upsetting your output. You may have noticed the recent posts discussing the merits or otherwise of this behaviour.
I have never concerned myself much with this, as my focus is cartographed drawings, not models, so I just ignore the spurious ‘walls’ at pitches. Hence this advice might not be perfect. Try using 89.9 deg in place of 90 deg as a workaround.
Incidentally, does anyone know what the default value of vthreshold is?
Bruce
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Hi Laurent, there is no chance, that +90 or -90 will be interpreted as front-back instead of north-south. Setting vthreshold to 91 or -91 is not possible. The default value for vthreshold is 60 degrees. As this is quite hot issue - I will try to change this strange behavior - I agree that NSEW is not a very good idea. Best regards, S. On 23 May 2012 13:21, cawa sorix <cawa.sorix@gmail.com> wrote:
Hi Bruce,
Thanks for your quick answer.
In fact I found vthreshold threads, and I tested different values for that parameter without any change. It seems default value is -90 90 and it not possible to choose 91 or a wild cart.
I will change every vertical values to 89.9 and I try to draw my cave. Is there any evolution plan on the todo list about this subject ?
Laurent.
Thanks developers for yours job.
2012/5/22 Bruce <bruce@tomo.co.nz>:
Laurent
Welcome to the list.
As the gradient of a survey shot increases, therion switches from the assumption that passages are measured LRUD to an assumption that they are measured LR-front-back and then at 90 deg to NSEW. At present the user has some control of this, but not complete control.
From the therion book (and slightly rephrased by me)...
vthreshold <number> <units> threshold for interpreting LRUD readings as left-right-front-back reading perpendicular to the shot.
If passeges are near horizontal (inclination < vthreshold), LR is perpendicular to the
shot and UD is vertical.
If passages are near vertical (inclination > vthreshold), UD becomes perpendicular to the shot – otherwise passages would not look very good.
In the case of vertical shots, UD is interpreted as north-south dimension from the station to allow tube-like modelling of verticals.
It is the feature in the last sentence which is upsetting your output. You may have noticed the recent posts discussing the merits or otherwise of this behaviour.
I have never concerned myself much with this, as my focus is cartographed drawings, not models, so I just ignore the spurious ‘walls’ at pitches. Hence this advice might not be perfect. Try using 89.9 deg in place of 90 deg as a workaround.
Incidentally, does anyone know what the default value of vthreshold is?
Bruce
_______________________________________________ Therion mailing list Therion@speleo.sk http://mailman.speleo.sk/mailman/listinfo/therion
_______________________________________________ Therion mailing list Therion@speleo.sk http://mailman.speleo.sk/mailman/listinfo/therion
participants (3)
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Bruce -
cawa sorix -
Stacho Mudrak