function structure = GY_eqn(name,bond_number,bonds,direction,cr,args, ...
structure,eqnfile);
% GY_eqn - equations for GY component
%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%% Model Transformation Tools %%%%%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Matlab function GY_eqn
% structure = GY_eqn(bond_number,bonds,direction,cr,args, ...
% structure,eqnfile);
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% Version control history
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% $Id$
% %% $Log$
% %% Revision 1.1 2000/12/28 11:51:06 peterg
% %% Initial revision
% %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Copyright (c) P.J. Gawthrop, 1996.
if nargin<8
eqnfile = 'stdout';
end;
% There are 2 ports; extract the information
e_1 = bonds(1,1);
f_1 = bonds(1,2);
e_2 = bonds(2,1);
f_2 = bonds(2,2);
% Effort - flow
if e_1==1
outbond = bond_number(2);
inbond = bond_number(1);
outport = 2;
inport = 1;
outcause = -1;
incause = 1;
else
outbond = bond_number(1);
inbond = bond_number(2);
outport = 1;
inport = 2;
outcause = 1;
incause = -1;
end;
eqn = equation("GY",name,cr,args,outbond,outcause,outport, ...
inbond,incause,inport);
fprintf(eqnfile, '%s',eqn);
% Flow-effort
if f_1==-1
outbond = bond_number(2);
inbond = bond_number(1);
outport = 2;
inport = 1;
outcause = 1;
incause = -1;
else
outbond = bond_number(1);
inbond = bond_number(2);
outport = 1;
inport = 2;
outcause = -1;
incause = 1;
end;
eqn = equation("GY",name,cr,args,outbond,outcause,outport, ...
inbond,incause,inport);
fprintf(eqnfile, '%s',eqn);