Interfacing function
eng

##
NEGTOPOS_f

### File content

    function [x,y,typ]=NEGTOPOS_f(job,arg1,arg2)
    // Copyright INRIA
    x=[];y=[];typ=[];
    select job
    case 'plot' then
      standard_draw(arg1)
    case 'getinputs' then
      [x,y,typ]=standard_inputs(arg1)
    case 'getoutputs' then
      [x,y,typ]=standard_outputs(arg1)
    case 'getorigin' then
      [x,y]=standard_origin(arg1)
    case 'set' then
      x=arg1;
      x.model.firing=-1 //compatibility
    case 'define' then
      model=scicos_model()
      model.sim=list('zcross',1)
      model.nzcross=1
      model.in=1
      model.evtout=1
      model.rpar=[-1;-1;0;-1]
      model.blocktype='z'
      model.firing=-1
      model.dep_ut=[%t %f]

      gr_i=['xstringb(orig(1),orig(2),'' - to + '',sz(1),sz(2),''fill'');']
      x=standard_define([2 2],model,[],gr_i)
    end
    endfunction