sci-chemistry/molden
Display molecular density from GAMESS-UK, GAMESS-US, GAUSSIAN and Mopac/Ampac.
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opengl
Global: Adds support for OpenGL (3D graphics)
debug
Global: Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see http://www.gentoo.org/proj/en/qa/backtraces.xml