Hi there,
i just wrote a small tool to do the conversion from a therion surface
mesh into survex format:
https://github.com/hbeni/therionsurface2survex
It would be nice if some C++ programmers can look over the code as this
is my first c++ endeavour.
The program basically parses the therion source file and generates *fix
commands out of it together with nosurvey-centerline connecting the
stations to a mesh.
The resulting .swx file then can be put trough survex' cavern program to
generate a 3d file of the mesh.
That can be easily combined with a 3d file of the cave generated from
therion (using the import statements). For ease of use provided a basic
example for combining in the readme. A sample to parse a mesh is in the
projects example/ folder, however i also tested it positive with the
rabbit cave example.
With my dataset the calculation seems to take a little longer.... there
are 388.800 fixe stations in the surface mesh giving a 31M swx-file in
total.
I hope this will finish somtime (running already for 25 minutes) but
maybe i overloaded cavern with this.
Otherwise i probably need to turn down the grid resolution (currently
10m grid size).
Am 2020-03-26 23:23, schrieb Tarquin Wilton-Jones:
However, my aven does not enable me to avtivate it in the view menu,
its
disabled (greyed out), i assume because i do not have surface data in
the file?
Sounds like it. It works based on legs that have:
flags surface
1 2 9.8 123 0
flags not surface
Or if you have used TerrainTool to export it as a grid, it will have
added that for you.
This has been very easy for us in our projects because we either knew
exactly which line to follow on the surface beforehand, or we surveyed
the cave first then surveyed over the surface afterwards, staying above
the passage so we could have a useful measure of the surface above the
cave.
In more complex caves, I rely on TerrainTool to cover the surface.
Looking forward to being able to use the new more accurate NASADEM so
that the measurements are actually accurate.
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