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function varargout = volface(t)
%
% [openface,elemid]=volface(t)
%
% find the surface patches of a volume
%
% author: Qianqian Fang, <q.fang at neu.edu>
% date: 2009/10/13
%
% input:
% t: input, volumetric element list, dimension (ne,4)
%
% output:
% openface: list of faces of the specified volume
% elemid (optional): the corresponding index of the
% tetrahedron of an open-edge or triangle,
% elemid has the same length as openedge.
%
% -- this function is part of iso2mesh toolbox (http://iso2mesh.sf.net)
%
[varargout{1:nargout}] = surfedge(t);
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