February 2007 - Therion

extended section
by marco corvi 12 Feb '07

12 Feb '07

hi, i have a question. i have a loop to adjust, if i do not equate stations in extended section there is an altitude gap between them. of course therion does not know they are at the same altitude (or depth). if i equate, the drawing is awfully distorted because therion tries to draw them at the same point. is there a way to tell therion that two stations are at the same altitude (depth) ? (but to draw them separately). thanks, marco

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Best structure to use for using 3d files.
by Michael Lake 12 Feb '07

12 Feb '07

Hi all I'm very confused over the heirarcchy of stations in therion and survex when used together. Two email threads have been very useful but Im still confused. Date: Mon, 19 Dec 2005 From: Andrew Atkinson Subject: [Therion] Nesting surveys Date: Tue, 27 Jun 2006 From: Wookey Subject: [Therion] Dataset structure including survex files Nevertheless even with the help of the above emails I'm still lost. The wiki docs and the thbookdocs cover mostly using survey data in therion format but I'll be wishing to use 3d files from the top level. From what I understand of the above email threads that seems the best way to go for a new project where others will be using survex but not therion. I have got a therion dataset working and it's attached as a tarball. But I seem to have to add empty survey containers in like this into cave.th survey rect -title "The rectangle cave" endsurvey survey extra -title "The extra bit" endsurvey Also how does one get the full pathname of stations displayed on the PDF ie like rect.1, rect.2 instead of just 1,2 etc Also how can one get all the stations labelled on the PDF without having to assign a point to them manually in therion map editor? Can one get lines betwwen the stations instead of just the "little flying bat" symbols? i.e. a centerline line. Finally whats the suggestions for the best structure/layout to sue for using just 3d files for the data. You see I was thinking of putting survex data into surveys/ and therion scraps into maps/ Mike Mike Lake

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Re: [Therion] loch crash.
by Michael Lake 11 Feb '07

11 Feb '07

Hi Thanks for the quick response. Philip Schuchardt wrote: > Don't compile wxWidgets with unicode support. Then the code should work. I just installed wx via a Debian package and didn't compile it from src. I wasn't comptemplating having to compile it :-) Mike Lake

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Re: [Therion] loch crash.
by Michael Lake 11 Feb '07

11 Feb '07

Hi Stacho asked: > Another point - we have to be sure, that the problem is in loch. Could you > please try to compile and run default wxWidgets OpenGL samples? > (e.g. samples/opengl/cube). If it will work, the problem is in loch, if not, the > problem is in wxWidgets OpenGL canvas. Good point. cube$ ls Makefile cube.cpp cube.h cube$ make g++ -c `wx-config --cxxflags` -o cube.o cube.cpp cube.h:49: error: default argument for parameter of type 'const wxString&' has type 'const char [13]' cube.h:53: error: default argument for parameter of type 'const wxString&' has type 'const char [13]' cube.cpp: In constructor 'ScanCodeCtrl::ScanCodeCtrl(wxWindow*, wxWindowID, int, const wxPoint&, const wxSize&)': cube.cpp:68: error: conversion from 'const char [1]' to 'const wxString' is ambiguous /usr/include/wx-2.6/wx/string.h:643: note: candidates are: wxString::wxString(wxChar, size_t) <near match> /usr/include/wx-2.6/wx/string.h:633: note: wxString::wxString(int) <near match> so it looks like there are lots of things wrong. It could be that I just dont have something else for development that I need installed maybe ? Mike Lake

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loch crash. [was usr/bin/ld: cannot find -lvtkjpeg]
by Michael Lake 09 Feb '07

09 Feb '07

Hi all It's a while since the last email where loch was failing with: loch$ ./loch The program 'loch' received an X Window System error. This probably reflects a bug in the program. The error was 'GLXBadContext'. (Details: serial 24 error_code 155 request_code 143 minor_code 5) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the --sync command line option to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.) loch$ Philip Schuchardt asked: > What video card do you have? It's an Intel Corporation Mobile 945GM/GMS/940GML Express Integrated Graphics Controller on a Dell Inspiron 620 laptop. Stacho asked: > Did you have loch working on your machine before? > If you will compile loch in debug mode and run it from GDB, it should > report more info about where in the code the problem is. > cd loch > make clean config-debug all > gdb -se ./loch OK I have done that. at the (gdb) prompt I type run and I get... (no debugging symbols found) (no debugging symbols found) The program 'loch' received an X Window System error. This probably reflects a bug in the program. The error was 'GLXBadContext'. (Details: serial 24 error_code 155 request_code 143 minor_code 5) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the --sync command line option to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.) Program exited with code 01. I haven't used gdb before so I'll need some guidance on helping here. Also I have installed therion-viewer_0.5.0-1_i386.deb from Wookies site. It also crashes with the same error. Mike Lake

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Viewing raster surveys on the web
by Martin Green 07 Feb '07

07 Feb '07

Hi, I have just returned to this list, but I heard that you are looking at making vector based kml files, for looking at in google earth and google maps. I thought I would mail to show some experimenting that I have been doing. It still needs some work, for example stopping the surveys going faint when zoomed out, and making the added pointers less rubbish. There is a plan to allow anyone to contribute cave surveys and marker points. Julian is looking into using wikpeida/wikisource/wikicommons as a way people can contribute cave surveys etc. Templates can be made and then requested back. There is also the possibility for there to be multiple ways of viewing the images, such as in more 3D or open source viewers. Be warned that the tiles are created lazily, so if you are the first to view a tile, it may be a little slow to load. Example views are in austria: http://seagrass.goatchurch.org.uk/~mjg/cgi-bin/map.py?lat=47.68584577306058… and in china: http://seagrass.goatchurch.org.uk/~mjg/cgi-bin/map.py?lat=29.58584804330842… Hope they are of interest, let me know if anyone is going down similar lines. Cheers, Martin

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therion by examples
by marco corvi 06 Feb '07

06 Feb '07

hi, with the new version of therion out there, i realized that "therion by examples" as it is on the wiki, is getting outdated, and it is less and less useful. i would like to bring it up to the novelties of therion 0.5.0 (and beyond). i have been keeping a "personal" version of tbe, more uptodate, but it diverged from the wiki, because i did not have the time nor the patience to keep them aligned, and, above all, i can work on it mostly offline. now i would like to bring them together. any suggestion ? anyone willing to help ? thanks, marco

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usr/bin/ld: cannot find -lvtkjpeg
by Michael Lake 05 Feb '07

05 Feb '07

Hi all I have downloaded therion-0.5 and the compile fails with: /usr/bin/ld: cannot find -lvtkjpeg Searching on google brings up some references but nothing that seems right for my problem. Im compiling on an Dell Intel machine with Debian. I have installed: libvtk5 and libvtk5-dev The dev package contains the file: /usr/include/vtk-5.0/vtk_jpeg.h I have modified the Makefile for loch to find the VTK directory: #VTKPATH = /usr/local/include/vtk-5.0 #VTKLIBPATH = /usr/local/lib/vtk-5.0 VTKPATH = /usr/include/vtk-5.0 VTKLIBPATH = /usr/lib/vtk-5.0 otherwise it couldnt fin the VTK include directory. How do I get this vtkjpeg ? Mike Lake

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Re: [Therion] usr/bin/ld: cannot find -lvtkjpeg
by Michael Lake 04 Feb '07

04 Feb '07

Hi Thanks, > 1. Compile VTK your self and link therion against this compilation. > Usually vtkjpeg is created. :-( I tried number 2 > 2. Link therion against libjpeg already present in your system. For > this, you need to do following changes: * install libjpeg-devel package DONE * in loch/lxImgIO.cxx:13 change #include <vtk_jpeg.h> to #include <libjpeg.h> (or whatever libjpeg header is - I have no idea.) Its <jpeglib.h> * in Makefile replace -lvtkjpeg with -ljpeg DONE I also had to replace the -lvtkpng with -lpng and to remove the zlib. Now it compiles but I get this error upon trying to run it. The program 'loch' received an X Window System error. This probably reflects a bug in the program. The error was 'GLXBadContext'. (Details: serial 24 error_code 155 request_code 143 minor_code 5) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the --sync command line option to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.) loch$ I was using the Debian package before from Wookies site but decided to use the source as it was so much later and its progressing so fast :-) Mike Lake

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Cave Overlays on Google Maps Web Sites
by Bill Chadwick 02 Feb '07

02 Feb '07

Hi, It is quite easy to create a web page that shows a cave survey overlay on top of Google / Virtual Earth maps. For an example go to http://www.bdcc.co.uk/mendip.html?Latitude=51.2988&Longitude=-2.7104&Zoom=18 &MapType=Aerial and then select Caves in the overlays drop down (best in Firefox). You will find overlays for Upper Flood (exciting new extensions), Swildons Hole, Manor Farm and Longwood August. I use the Microsoft MapCruncher to generate the tile sets (256x256 pixel PNGs) for Google Maps from a single PDF or .png image. As this is quite a nice way of presenting cave surveys, perhaps a Google tile generator would be a good add on for Therion. The advantage of building the renderer into Therion would be that the overlay could be drawn separately for each Google Zoom level to achieve a good line width and text size. I am well informed in the areas of coordinate systems and map projections and able to program in C++. With some guidance I might be able to help with the coding of such an extension. Regards, Bill Chadwick

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