IRC log for #brlcad on 20160710

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02:29.31 Notify 03BRL-CAD:brlcad * 68244 brlcad/trunk/TODO: openmesh licensing is now trivial to work with. consider for mesh processing.
03:45.40 boj How to import several *.g model into mged simultaneously?
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12:56.07 brlcad boj: dbconcat
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13:52.40 boj thanks, brlcad, I have a problem using gqa, the same plane with different position(rotation and translation), gqa will give different result?
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16:38.58 starseeker confound it
16:39.13 starseeker the 3dm-g mechanism isn't working for MSVC
16:39.25 brlcad mechanism?
16:54.04 *** join/#brlcad ickby_ (~stefan@x5d847b68.dyn.telefonica.de)
16:54.13 starseeker the wrapping script I put in place to handle the plugins from libgcv
16:54.49 starseeker 3dm needs libgcv's plugins during the build process, but if the install dir is already in place it will insist on looking there and not in the build dir unless BRLCAD_ROOT is set
16:55.07 starseeker same problem we have with tcl scripts, but this is more serious
16:55.18 starseeker build failure if it doesn't get this right
16:55.40 starseeker looks like I'm missing some logic for the multi-config case
16:55.42 starseeker working it now
17:07.46 Notify 03BRL-CAD:starseeker * 68245 (brlcad/trunk/db/nist/CMakeLists.txt brlcad/trunk/misc/CMake/builddir_cmd.cmake.in): Give this a try for 3dm-g building.
17:14.54 brlcad there is an env override for gcv, LIBGCV_PLUGINS_PATH
17:15.26 brlcad build script should probably set that (instead of BRLCAD_ROOT)
17:16.06 brlcad eep, this looks odd...
17:16.19 starseeker what, the script logic?
17:16.26 brlcad wonders why there is also a LIBGCV_PLUGINS_DIRECTORY defined in _gcv_plugins_get_path()
17:16.31 starseeker oh
17:17.38 brlcad ah, I see .. yeah, that doesn't make usability sense to me .. just need one var to point to the place
17:18.02 brlcad not one var for the top part of the path, and whole other var for the final folder name...
17:18.46 Notify 03BRL-CAD:starseeker * 68246 brlcad/trunk/misc/CMake/builddir_cmd.cmake.in: duh - BUILD_TYPE, not BUILD_DIR
17:19.36 brlcad fwiw, it looks to me that _gcv_plugins_get_path() is inadequate
17:19.56 starseeker isn't surprised
17:20.52 starseeker is just trying for a minimal fix so 7.26.0 will build with an already installed BRL-CAD is in place, but the issue needs more thought
17:26.17 brlcad nods
17:28.27 starseeker brlcad: out of curiosity, how does openmesh's half-edge data struture compare to nmg?
17:31.59 starseeker ok, I *think* that's got it...
17:32.07 starseeker does a clean-dir Windows build
17:45.22 brlcad starseeker: nmg's radial edge method is considerably superior to half-edge in terms of flexibility (and complexity)
17:46.13 brlcad half edge cannot represent non-manifold geometry (which depending on the interface or import may be an intermediate modeling state)
17:48.09 brlcad this is particularly important for boolean eval of meshes as a resulting evaluation is often non-manifold (e.g. intersection of two tangent boxes)
17:50.01 brlcad doesn't mean we can't try to make it work or that it won't be useful for a whole class of operations, but half edge presents a different set of challenges
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