Interfacing function
eng

##
BIGSOM_f

### File content

    function [x,y,typ]=BIGSOM_f(job,arg1,arg2)
    // Copyright INRIA
    x=[];y=[];typ=[];
    select job
    case 'plot' then
      sgn=arg1.model.rpar
      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;
      graphics=arg1.graphics
      model=arg1.model
      exprs=graphics.exprs
      while %t do
        [ok,sgn,exprs]=getvalue('Set sum block parameters',..
        			   'Inputs ports signs/gain',list('vec',-1),exprs)
        if ~ok then
          break
        end

        in = -ones(size(sgn,'*'),1)

        //** Patch: check added
        [model,graphics,ok] = check_io(model,graphics,in,-1,[],[]);
        if ok then
          model.rpar = sgn(:)    ;
          graphics.exprs = exprs ;
          x.graphics = graphics;
          x.model = model ;
          break
        end

      end
    case 'define' then
      sgn=[1;1]
      model=scicos_model()
      model.sim=list('sum',2)
      model.in=[-1;-1]
      model.out=-1
      model.rpar=sgn
      model.blocktype='c'
      model.dep_ut=[%t %f]

      exprs=sci2exp(sgn)
      gr_i=['[x,y,typ]=standard_inputs(o) ';
    	'dd=sz(1)/8,de=0,'
    	'if ~arg1.graphics.flip then dd=6*sz(1)/8,de=-sz(1)/8,end'
    	'for k=1:size(x,''*'')';
    	'  if sgn(k)>0 then';
    	'    xstring(orig(1)+dd,y(k)-4,''+'')';
    	'  else';
    	'    xstring(orig(1)+dd,y(k)-4,''-'')';
    	'  end';
    	'end';
    	'xx=sz(1)*[.8 .4 0.75 .4 .8]+orig(1)+de';
    	'yy=sz(2)*[.8 .8 .5 .2 .2]+orig(2)';
    	'xpoly(xx,yy,''lines'')']
      x=standard_define([2 3],model, exprs,gr_i)
    end
    endfunction