Interfacing function
eng

##
BACKLASH

### File content

    function [x,y,typ]=BACKLASH(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;
        rpar=model.rpar
        while %t do
          [ok,ini,gap,zcr,exprs]=getvalue('Set backlash parameters',..
    				      ['initial output';
    		    'gap';'use zero-crossing (0:no, 1:yes)'],..
    		    list('vec',1,'vec',1,'vec',1),exprs)

          if ~ok then break,end
          if ok then
    	graphics.exprs=exprs;
    	rpar(1)=ini;rpar(2)=gap;
    	if zcr<>0 then
    	  model.nzcross=2
    	else
    	  model.nzcross=0
    	end
    	model.rpar=rpar
    	x.graphics=graphics;x.model=model
    	break
          end
        end
       case 'define' then
        exprs=['0';'1';'1']
        model=scicos_model()
        model.sim=list('backlash',4)
        model.in=1
        model.out=1
        model.rpar=[0;1]
        model.nzcross=2;
        model.blocktype='c'
        model.dep_ut=[%t %f]

        gr_i=['xstringb(orig(1),orig(2),[''backlash''],sz(1),sz(2),''fill'')']

        x=standard_define([2.5 2],model,exprs,gr_i)
      end
    endfunction