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function Bmat = Ucompmass2 (imesh,Bvect,Cvect);
% Bmat = Ucompmass2 (imesh,Bvect,Cvect);
% This file is part of
%
% SECS2D - A 2-D Drift--Diffusion Semiconductor Device Simulator
% -------------------------------------------------------------------
% Copyright (C) 2004-2006 Carlo de Falco
%
%
%
% SECS2D 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.
%
% SECS2D 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 SECS2D; If not, see <http://www.gnu.org/licenses/>.
Nnodes =size(imesh.p,2);
Nelements =size(imesh.t,2);
%%fprintf(1,'\n*--------------------*\n');
%%fprintf(1,'building Mass Matrix\n*');
wjacdet =imesh.wjacdet(:,:);
coeff =Bvect(imesh.t(1:3,:));
coeffe =Cvect(:);
% build local matrix
Blocmat=zeros(3,Nelements);
for inode=1:3
Blocmat(inode,:) = coeffe'.*coeff(inode,:).*wjacdet(inode,:);
%%fprintf(1,'----');
end
gnode=(imesh.t(1:3,:));
%%fprintf(1,'--');
% assemble global matrix
Bmat = sparse(gnode(:),gnode(:),Blocmat(:));
%%fprintf(1,'----*\nDONE!\n\n\n');
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