If we think of the printer as building up a sequence of lines on a plane (and in turn building up a sequence of planes), you can model the ink selection process as counting the number of plane intersections traversed by one of these lines. Where you have crossed an odd number of triangles you lay down ink (and you discard lines with no ink).
-- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
