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// Scicos
//
// Copyright (C) INRIA - METALAU Project <scicos@inria.fr>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// See the file ../license.txt
//
function [x,y,typ]=DLR_f(job,arg1,arg2)
x=[];
y=[];
typ=[];
select job
case "set" then
x=arg1;
graphics=arg1.graphics;
exprs=graphics.exprs
model=arg1.model;
x0=model.dstate;
ns=prod(size(x0));
%scicos_context=%scicos_context; //copy the semi-global variable locally
%scicos_context.z=%z //add z definition to the context
while %t do
[ok,num,den,exprs]=scicos_getvalue("Set discrete SISO transfer parameters",..
["Numerator (z)";
"Denominator (z)"],..
list("pol",1,"pol",1),exprs)
if ~ok then
break,
end
if degree(num)>degree(den) then
message("Transfer must be proper")
ok=%f
end
if ok then
H=cont_frm(num,den)
[A,B,C,D]=H(2:5);
graphics.exprs=exprs;
[ns1,ns1]=size(A)
if ns1<=ns then
x0=x0(1:ns1)
else
x0(ns1,1)=0
end
rpar=[A(:);
B(:);
C(:);
D(:)]
model.dstate=x0
model.rpar=rpar
if norm(D,1)<>0 then
mmm=[%t %f];
else
mmm=[%f %f];
end
if or(model.dep_ut<>mmm) then
model.dep_ut=mmm,end
x.graphics=graphics;
x.model=model
break
end
end
x.model.firing=[] //compatibility
case "define" then
x0=0;
A=-1;
B=1;
C=1;
D=0;
exprs=["1";"1+z"]
model=scicos_model()
model.sim="dsslti"
model.in=1
model.out=1
model.evtin=1
model.dstate=x0(:)
model.rpar=[A(:);B(:);C(:);D(:)]
model.blocktype="d"
model.dep_ut=[%f %f]
gr_i=[]
x=standard_define([2.5 2.5],model,exprs,gr_i)
end
endfunction
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