ciias.m

This software gave volume MoM solution by the CG-FFT method

function ciias=ciias(pat,x0,y0,z0,dx,dy,dz);

%  Check if the point (x0,y0,z0  ) is inside the arbitrary closed surface which the
%  points on pat abelong to it.

ciias=0;

[Y,I]=sort(sqrt((pat(:,3)-z0).^2+(pat(:,2)-y0).^2));

[Y1,I1]=sort(pat(I(1:8),1));
xnow=x0;
p=0;
for j=1:8,
   if (pat(I(I1(j)),1)>x0),
      if (sqrt((pat(I(I1(j)),3)-z0).^2+(pat(I(I1(j)),2)-y0).^2)<=sqrt(dz^2+dy^2)),
         if (abs(pat(I(I1(j)),1)-xnow)>=dx),
            xnow=pat(I(I1(j)),1);
            p=p+1;
         end;
      end;
   end;
end;
if (floor(p/2)*2==p), 
   ciias=0;
else
   ciias=1;
end;