AWI for Gary Bishop.
AWI for Gary Bishop.

plP_clip_poly declaration.  This helper function is used for 3D clipping.

svn path=/trunk/; revision=3769

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot