Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / secs2d-0.0.8 / Utilities / Usubmesh.m

diff --git a/octave_packages/secs2d-0.0.8/Utilities/Usubmesh.m b/octave_packages/secs2d-0.0.8/Utilities/Usubmesh.m
new file mode 100644 (file)
index 0000000..4ade558
--- /dev/null
+++ b/octave_packages/secs2d-0.0.8/Utilities/Usubmesh.m
@@ -0,0 +1,93 @@
+function [omesh,onodes,oelements]=Usubmesh(imesh,intrfc,sdl,short)
+
+#
+#  [omesh,onodes,oelements]=Usubmesh(imesh,intrfc,sdl,short)
+#
+# builds the mesh structure for
+# the given list
+# of subdomains sdl
+#
+# NOTE: the intrfc parameter is unused and only kept 
+#       as a legacy
+
+
+
+% 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/>.
+
+
+
+
+
+nsd = length(sdl);
+
+#######
+# the shp field will remain unchanged
+if (~short)
+    omesh.shp = imesh.shp;
+end
+
+#######
+# set list of output triangles 
+oelements=[];
+for isd=1:nsd
+       oelements = [oelements find(imesh.t(4,:)==sdl(isd))];
+end
+
+omesh.t = imesh.t(:,oelements);
+
+#######
+# discard unneeded part of shg and wjacdet
+if (~short)
+    omesh.shg= imesh.shg(:,:,oelements);
+    omesh.wjacdet = imesh.wjacdet(:,oelements);
+end
+
+#######
+# set list of output nodes
+onodes          = unique(reshape(imesh.t(1:3,oelements),1,[]));
+omesh.p         = imesh.p(:,onodes);
+
+
+#######
+# use new node numbering in connectivity matrix
+indx(onodes) = [1:length(onodes)];
+iel = [1:length(oelements)];
+omesh.t(1:3,iel) = indx(omesh.t(1:3,iel));
+
+#######
+# set list of output edges
+omesh.e =[];
+for isd=1:nsd
+       omesh.e = [omesh.e imesh.e(:,imesh.e(7,:)==sdl(isd))];
+       omesh.e = [omesh.e imesh.e(:,imesh.e(6,:)==sdl(isd))];
+end
+omesh.e=unique(omesh.e',"rows")';
+
+#######
+# use new node numbering in boundary segment list
+ied = [1:size(omesh.e,2)];
+omesh.e(1:2,ied) = indx(omesh.e(1:2,ied));
+
+% Last Revision:
+% $Author: adb014 $
+% $Date: 2008-02-04 16:26:27 +0100 (man, 04 feb 2008) $
+