Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / secs2d-0.0.8 / Utilities / Ufvsgcurrent2.m

diff --git a/octave_packages/secs2d-0.0.8/Utilities/Ufvsgcurrent2.m b/octave_packages/secs2d-0.0.8/Utilities/Ufvsgcurrent2.m
new file mode 100644 (file)
index 0000000..83b0e17
--- /dev/null
+++ b/octave_packages/secs2d-0.0.8/Utilities/Ufvsgcurrent2.m
@@ -0,0 +1,86 @@
+function [jx,jy]=Ufvsgcurrent2(omesh,n,psi,psith,coeffe);
+
+  %% [jx,jy]=Udrawcurrent2(omesh,n,psi,psith,coeffe);
+  
+  %% 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.
+  %%
+  %%  Youx should have received a copy of the GNU General Public License
+  %%  along with SECS2D; If not, see <http://www.gnu.org/licenses/>.
+  
+  Nelem = size(omesh.t,2);
+  jx = NaN*ones(Nelem,1);
+  jy = jx;
+  coeffe = coeffe';
+  %%for iel=1:Nelem
+  
+  
+  dpsi1 = (psi(omesh.t(3,:))-psi(omesh.t(2,:)))';
+  dvth1 = (psith(omesh.t(3,:))-psith(omesh.t(2,:)))';
+  vthm1 = Utemplogm(psith(omesh.t(3,:)),psith(omesh.t(2,:)))';
+  [bp,bn] = Ubern((dpsi1-dvth1)./vthm1);
+  t1x    = omesh.p(1,omesh.t(3,:))-omesh.p(1,omesh.t(2,:));
+  t1y    = omesh.p(2,omesh.t(3,:))-omesh.p(2,omesh.t(2,:));
+  l1     = sqrt(t1x.^2+t1y.^2);
+  t1x    = t1x./l1;
+  t1y    = t1y./l1;
+
+  j1x    = vthm1.*(coeffe./l1) .* ( n(omesh.t(3,:))' .* bp - ...
+                                  n(omesh.t(2,:))' .* bn) .* t1x;
+  j1y    = vthm1.*(coeffe./l1) .* ( n(omesh.t(3,:))' .* bp - ...
+                                  n(omesh.t(2,:))' .* bn) .* t1y;
+  gg1= -reshape(omesh.shg(1,2,:).*omesh.shg(1,3,:)+...
+               omesh.shg(2,2,:).*omesh.shg(2,3,:),1,[]).*l1.^2;
+  
+  dpsi2 = (psi(omesh.t(1,:))-psi(omesh.t(3,:)))';
+  dvth2 = (psith(omesh.t(1,:))-psith(omesh.t(3,:)))';
+  vthm2 = Utemplogm(psith(omesh.t(1,:)),psith(omesh.t(3,:)))';
+  [bp,bn] = Ubern((dpsi2-dvth2)./vthm2);
+  t2x = omesh.p(1,omesh.t(1,:))-omesh.p(1,omesh.t(3,:));
+  t2y = omesh.p(2,omesh.t(1,:))-omesh.p(2,omesh.t(3,:));
+  l2 = sqrt(t2x.^2+t2y.^2);
+  t2x = t2x./l2;
+  t2y = t2y./l2;
+  j2x = vthm2.*(coeffe./l2) .* ( n(omesh.t(1,:))' .* bp - ...
+                               n(omesh.t(3,:))' .* bn) .* t2x;
+  j2y = vthm2.*(coeffe./l2) .* ( n(omesh.t(1,:))' .* bp - ...
+                               n(omesh.t(3,:))' .* bn) .* t2y;
+  gg2= -reshape(omesh.shg(1,1,:).*omesh.shg(1,3,:)+...
+               omesh.shg(2,1,:).*omesh.shg(2,3,:),1,[]).*l2.^2;
+  
+  dpsi3 = (psi(omesh.t(2,:))-psi(omesh.t(1,:)))';
+  dvth3 = (psith(omesh.t(2,:))-psith(omesh.t(1,:)))';
+  vthm3 = Utemplogm(psith(omesh.t(2,:)),psith(omesh.t(1,:)))';
+  [bp,bn] = Ubern((dpsi3-dvth3)./vthm3);
+  t3x = omesh.p(1,omesh.t(2,:))-omesh.p(1,omesh.t(1,:));
+  t3y = omesh.p(2,omesh.t(2,:))-omesh.p(2,omesh.t(1,:));
+  l3  = sqrt(t3x.^2+t3y.^2);
+  t3x = t3x./l3;
+  t3y = t3y./l3;
+  j3x = vthm3.*(coeffe./l3) .* ( n(omesh.t(2,:))' .* bp - ...
+                               n(omesh.t(1,:))' .* bn) .* t3x;
+  j3y = vthm3.*(coeffe./l3) .* ( n(omesh.t(2,:))' .* bp - ...
+                               n(omesh.t(1,:))' .* bn) .* t3y;
+  gg3= -reshape(omesh.shg(1,2,:).*omesh.shg(1,1,:)+...
+               omesh.shg(2,2,:).*omesh.shg(2,1,:),1,[]).*l3.^2;
+  
+  jx = j1x.*gg1+j2x.*gg2+j3x.*gg3;
+  jy = j1y.*gg1+j2y.*gg2+j3y.*gg3;
+  
+  %%end
+