--- /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
+
+#ifdef HAVE_MATH_H
+#include <math.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 WW, HH, aa, bb, cc, dd, ww, hh, Er1, Er2;
+extern int W, H, a, b, c, d, w, h;
+extern int verbose;
+extern int lowest;
+extern int highest;
+
+void convert_create_bmp_for_rect_in_rect_dimensions_to_integers(int accuracy_level)
+{
+ /* A number of paramters are set to -1, as otherwise the compiler
+ complaings they may be used unitialised. It is wise to check they
+ are not -1 before assining a variable to their contents,
+ but I can't be bothered. */
+ int best_W=-1, best_H=-1, best_a=-1, best_b=-1, best_c=-1;
+ int best_d=-1, best_w=-1, best_h=-1;
+ int min, max;
+ int i;
+ double max_gridsize, min_gridsize;
+ double error, error_min=VERY_LARGE, gridsize=-1, best_grid_size=-1;
+
+ /* scale grid size, according to a command line option */
+ /*lowest*=(int) 0.5+pow(2,accuracy_level); */
+ /*highest*=(int) 0.5+pow(2,accuracy_level); */
+ 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 H,a,b,c, etc */
+ if(W>H)
+ gridsize=WW/i;
+ else
+ gridsize=HH/i;
+ W=(int)(WW/gridsize + 0.5);
+ H=(int)(HH/gridsize + 0.5);
+ a=(int)(aa/gridsize + 0.5);
+ b=(int)(bb/gridsize + 0.5);
+ c=(int)(cc/gridsize + 0.5);
+ d=(int)(dd/gridsize + 0.5);
+ w=(int)(ww/gridsize + 0.5);
+ h=(int)(hh/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);
+ if(a>0)
+ error+=pow((aa-a*gridsize)/aa,2.0);
+ if(b>0)
+ error+=pow((bb-b*gridsize)/bb,2.0);
+ if(c>0)
+ error+=pow((cc-c*gridsize)/cc,2.0);
+ if(d>0)
+ error+=pow((dd-d*gridsize)/dd,2.0);
+ if(w>0)
+ error+=pow((ww-w*gridsize)/ww,2.0);
+ if(h>0)
+ error+=pow((hh-h*gridsize)/hh,2.0);
+ if(error < (error_min-TINY))
+ {
+ error_min=error;
+ best_W=W;
+ best_H=H;
+ best_a=a;
+ best_b=b;
+ best_c=c;
+ best_d=d;
+ best_w=w;
+ best_h=h;
+ best_grid_size=gridsize;
+ }
+ }
+ W=best_W;
+ H=best_H;
+ a=best_a;
+ b=best_b;
+ c=best_c;
+ d=best_d;
+ w=best_w;
+ h=best_h;
+ if(verbose==TRUE)
+ {
+ fprintf(stderr,"error_min=%.16f\n",error_min);
+ fprintf(stderr,"User requested: WW=%f HH=%f a=%f b=%f c=%f\nd=%f w=%f h=%fEr1=%f Er2=%f\n\n",WW,HH,aa,bb,cc,dd,ww,hh,Er1,Er2);
+ fprintf(stderr,"Internally the program is using the following grid:\n");
+ fprintf(stderr,"W=%d H=%d a=%d b=%d c=%d d=%d w=%d h=%d. \nThe grid size is %f mm, inches or whatever\n\n", W, H, a, b, c, d, w, h,best_grid_size);
+ if(error_min > TINY)
+ {
+ fprintf(stderr,"This means we are simulating a transmission line with these dimensions:\n");
+ fprintf(stderr,"W=%f H=%f a=%f b=%f c=%f d=%f\nw=%f h=%f (mm, inches or whatever)\n",W*best_grid_size,H*best_grid_size,a*best_grid_size,b*best_grid_size,c*best_grid_size,d*best_grid_size,w*best_grid_size,h*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(b == 0)
+ {
+ fprintf(stderr,"Error #12. The gap between the two conductors (b) is too small. Either increase the bitmap size (-b option), or make b at least %f\n",gridsize);
+ exit_with_msg_and_exit_code("",GAP_BETWEEN_CONDUCTORS_TOO_SMALL);
+ }
+ if(c == 0)
+ {
+ fprintf(stderr,"Error #13. The thickness of the inner conductor (c) is too small. Either increase the bitmap size (-b option), or make c at least %f\n",gridsize);
+ exit_with_msg_and_exit_code("",GAP_BETWEEN_CONDUCTORS_TOO_SMALL);
+ }
+ if(h == 0)
+ {
+ fprintf(stderr,"Error #14. The thickness of the dielectric of Er2 (h) is too small. Either increase the bitmap size (-b option), or make h at least %f\n",gridsize);
+ exit_with_msg_and_exit_code("",GAP_BETWEEN_CONDUCTORS_TOO_SMALL);
+ }
+ check_error(WW,W,best_grid_size,"W");
+ check_error(HH,H,best_grid_size,"H");
+ check_error(aa,a,best_grid_size,"a");
+ check_error(bb,b,best_grid_size,"b");
+ check_error(cc,c,best_grid_size,"c");
+ check_error(dd,d,best_grid_size,"d");
+ check_error(ww,w,best_grid_size,"w");
+ check_error(hh,h,best_grid_size,"h");
+}
projects / debian / atlc / blobdiff