my_model(x[3], a[1])
{
array begin[9];
array end[9];
array S[3];

begin = [-8.0, 0.0, 0.0,
         0.0, -8.0, 0.0,
         0.0, 0.0, -8.0];
end = [8.0, 0.0, 0.0,
       0.0, 8.0, 0.0,
       0.0, 0.0, 8.0];
S = [0.85, 0.85, 0.6];

myline = hfConvLine(x,begin,end,S,0.5);

my_model = myline;
}