[Therion] Colored Lines Based On Attributes

HI Everyone, Follow up on this thread from 17 years ago. https://mailman.speleo.sk/pipermail/therion/2009-September/002633.html We have tweaked the code, with Andrews help. To make it work In th2/Lines: Type u:wall Options: -clip off -attr color "(0, 0.5, 0)" Or -clip off -attr color green In thconfig: layout local code metapost def l_u_wall (expr P)= T:=identity; if known(ATTR_color):            pickup PenA;             draw P withpen PenA withcolor scantokens(ATTR_color);      fi;    Enddef; initsymbol("l_u_wall"); endcode endlayout