Interfacing function
eng

##
DIFF_f

### File content

    function [x,y,typ]=DIFF_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
      graphics=arg1.graphics;exprs=graphics.exprs
      model=arg1.model;
      while %t do
       [ok,x0,xd0,exprs]=getvalue('Set continuous linear system parameters',..
    	['Initial state','Initial Derivative'],list('vec',1,'vec',1),exprs)

        if ~ok then break,end
        graphics.exprs=exprs;
        model.state=[x0(:);xd0(:)];
        x.graphics=graphics;x.model=model
        break
      end
      x.model.firing=[] //compatibility
    case 'define' then
      x0=[0;0]
      model=scicos_model()
      model.sim=list('diffblk',10001)
      model.in=1
      model.out=1
      model.state=x0
      model.blocktype='c'
      model.dep_ut=[%f %t]

      exprs=[strcat(sci2exp(x0(1)));strcat(sci2exp(x0(2)))]
      gr_i=['xstringb(orig(1),orig(2),''  s  '',sz(1),sz(2),''fill'');']
      x=standard_define([2 2],model,exprs,gr_i)
    end
    endfunction