--- /dev/null
+/* atlc - arbitrary transmission line calculator, for the analysis of
+transmission lines are directional couplers.
+
+Copyright (C) 2002. Dr. David Kirkby, PhD (G8WRB).
+
+This program 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 package_version 2
+of the License, or (at your option) any later package_version.
+
+This program 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 this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+USA.
+
+Dr. David Kirkby, e-mail drkirkby at gmail.com
+
+*/
+#include "config.h"
+#include "definitions.h"
+
+extern double **Vij, **Er;
+extern unsigned char **oddity;
+extern int dielectrics_to_consider_just_now;
+extern double r;
+extern int width, height;
+
+double find_energy_per_metre(int w, int h)
+{
+ double energy_per_metre=0;
+ double Ex, Ey;
+
+ Ex=find_Ex(w,h);
+ Ey=find_Ey(w,h);
+ energy_per_metre+=0.5*EPSILON_0*(Ex*Ex+Ey*Ey);
+ if(dielectrics_to_consider_just_now>1)
+ energy_per_metre*=Er[w][h]; /* second run, energy proportional to Er */
+ return(energy_per_metre);
+}