I don't know where I got this code or what it does but I can get you a wd1 error.
require 'gui/gtkwd' coinsert 'jgl2' require 'gl2' dwin=: 3 : 0 0 0 1 1 dwin y : 'a c b d'=.x SC=:1000&*@((-&(a,c))"1 %((b-a),d-c)"1) sz=.":<.-:WINSHAPE PN=:y z=.'pc p closeok;xywh 2 2 ',sz,';cc g isigraph;pas 0 0 ' wd z,';pshow sw_showna;' ) dfillcolor=: 3 : 0 NB. Start Fill Color if. _1 e.y do. glbrushnull '' else. glrgb y glbrush'' end. ) dpoly=: 3 : 0"1 2 0 0 0 dpoly y : y=.x:^:_1 SC 2{."1 y dfillcolor x glpolygon ,y glshow'' ) where=:(<1 0 0 1,.0 0 1 1),(<2 1 1 2,.0 0 1 1),<3 2 2 3,.0 0 1 1 color=:(<0 0 0),(<128 0 0),<255 0 0 WINSHAPE=:300 150 _1 _1 4 2 dwin 'L' color dpoly each where However, since I have little recollection of it I'm not sure it ever worked. Linda ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm