--- /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"
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#include "definitions.h"
+#include "exit_codes.h"
+
+
+/* names, colours and Ers are all arrays of 10. It would be better they were
+in a structure as they are all linked closely, but they are not and I
+can't be bothered to change it */
+
+extern double dd, WW, HH, xx, yy, Er1;
+extern int d, W, H, x, y;
+extern int lowest;
+extern int highest;
+extern int verbose;
+
+void convert_create_bmp_for_circ_in_rect_dimensions_to_integers(int accuracy_level)
+{
+ int best_d=-1, best_W=-1, best_H=-1, best_x=-1, best_y=-1;
+ int min, max;
+ int i;
+ double max_gridsize, min_gridsize;
+ double error, error_min=VERY_LARGE, gridsize, best_grid_size=-1;
+
+ /* scale grid size, according to a command line option */
+ lowest*=1<<accuracy_level;
+ highest*=1<<accuracy_level;
+
+ max_gridsize=sqrt(WW*HH/(double )lowest); /* minimum dimension in m */
+ min_gridsize=sqrt(WW*HH/(double )highest);
+ if(WW>=HH)
+ {
+ min=WW/max_gridsize;
+ max=WW/min_gridsize;
+ }
+ else
+ {
+ min=HH/max_gridsize;
+ max=HH/min_gridsize;
+ }
+ for(i=min;i<=max;++i)
+ {
+ /* Try various combinations for d, W, H, etc */
+ if(W>H)
+ gridsize=WW/i;
+ else
+ gridsize=HH/i;
+ d=(int)(dd/gridsize + 0.5);
+ W=(int)(WW/gridsize + 0.5);
+ H=(int)(HH/gridsize + 0.5);
+ x=(int)(xx/gridsize + 0.5);
+ y=(int)(yy/gridsize + 0.5);
+ error=0.0;
+ error+=pow((WW-W*gridsize)/WW,2.0); /* relative error in W */
+ error+=pow((HH-H*gridsize)/HH,2.0);
+ error+=pow((dd-d*gridsize)/dd,2.0);
+ if(x>0)
+ error+=pow((xx-x*gridsize)/xx,2.0);
+ if(y>0)
+ error+=pow((yy-y*gridsize)/yy,2.0);
+ if(error < (error_min-TINY))
+ {
+ error_min=error;
+ best_d=d;
+ best_W=W;
+ best_H=H;
+ best_x=x;
+ best_y=y;
+ best_grid_size=gridsize;
+ }
+ }
+ if(best_d==-1) /* it has not been initialised */
+ exit_with_msg_and_exit_code("d has not been initialised",VARIABLE_NOT_INITIALISED);
+ else
+ d=best_d;
+ if(best_W==-1) /* it has not been initialised */
+ exit_with_msg_and_exit_code("W has not been initialised",VARIABLE_NOT_INITIALISED);
+ else
+ W=best_W;
+ if(best_H==-1) /* it has not been initialised */
+ exit_with_msg_and_exit_code("H has not been initialised",VARIABLE_NOT_INITIALISED);
+ else
+ H=best_H;
+ if(best_x==-1) /* it has not been initialised */
+ exit_with_msg_and_exit_code("x has not been initialised",VARIABLE_NOT_INITIALISED);
+ else
+ x=best_x;
+ if(best_y==-1) /* it has not been initialised */
+ exit_with_msg_and_exit_code("y has not been initialised",VARIABLE_NOT_INITIALISED);
+ else
+ y=best_y;
+ if(verbose==TRUE)
+ {
+ fprintf(stderr,"error_min=%.16f\n",error_min);
+ fprintf(stderr,"User requested: dd=%f WW=%f HH=%f xx=%f yy=%f Er=%f\n\n",dd,WW,HH,xx,yy,Er1);
+ fprintf(stderr,"Internally the program is using the following grid:\n");
+ fprintf(stderr,"d=%d W=%d H=%d x=%d y=%d \n", d, W, H, x, y);
+ fprintf(stderr,"The grid size is %f mm, inches or whatever\n\n", best_grid_size);
+ if(error_min > TINY)
+ {
+ fprintf(stderr,"This means we are simulating a transmission line with these dimensions:\n");
+ fprintf(stderr,"d=%f W=%f H=%f x=%f y=%f (mm, inches or whatever)\n",d*best_grid_size,W*best_grid_size,H*best_grid_size,x*best_grid_size,y*best_grid_size);
+ fprintf(stderr,"\nThese are slightly different to what you indicated on the command line,\n");
+ fprintf(stderr,"but they are the best approximation possible, given the grid size\n");
+ }
+ }
+ if( (d/2+x >= W) || (d/2+y >=H))
+ {
+ exit_with_msg_and_exit_code("The gap between the two conductors is too small. Either increase the bitmap size (-b option), or change the dimensions of one the conductors",GAP_BETWEEN_CONDUCTORS_TOO_SMALL);
+ }
+ check_error(dd,d,best_grid_size,"d");
+ check_error(WW,W,best_grid_size,"W");
+ check_error(HH,H,best_grid_size,"H");
+ check_error(xx,x,best_grid_size,"x");
+ check_error(yy,y,best_grid_size,"y");
+}
projects / debian / atlc / blobdiff