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#!/usr/bin/perl ... # ... colored lattice below lattice3d [$x,$y,$z-1], [$r,$g,$b];
# perl pdl perl: error while loading shared libraries: /usr/local/lib/perl5/site_ +perl/5.8.0/i686-linux-thread-multi/auto/PDL/Graphics/OpenGL/OpenGL.so +: undefined symbol: gluOrtho2D