Mathc initiation/a202
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kg_polaf.h |
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/* ------------------------------------ */
/* Save as : kg_polaf.h */
/* ------------------------------------ */
void G_polar_areaf(
CTRL_splot w,
double (*P_r)(double k),
tvalue t,
double sector
)
{
FILE *fp = fopen("a_main.plt","w");
fprintf(fp," reset\n"
" set size ratio -1\n"
" set polar\n"
" set grid polar lt 3\n\n"
" plot [%0.3f:%0.3f] [%0.3f:%0.3f] [%0.3f:%0.3f]\\\n"
" \"curve\" with lines lt 7 lw 3,\\\n"
" \"sector\" with lines lt 1 lw 3",
t.min,t.max,
w.xmin,w.xmax,w.ymin,w.ymax);
fclose(fp);
fp = fopen("curve","w");
for(t.value=t.min; t.value<t.max; t.value+=t.step)
fprintf(fp," %6.3f %6.3f\n",t.value,(*P_r)(t.value));
fprintf(fp," %6.3f %6.3f\n",t.max,(*P_r)(t.max));
fclose(fp);
fp = fopen("sector","w");
fprintf(fp," %6.3f %6.3f \n %6.3f %6.3f \n",
sector,(*P_r)(sector),0.,0.);
fprintf(fp," %6.3f %6.3f \n %6.3f %6.3f \n",
sector+2.*t.step,(*P_r)(sector+2.*t.step),0.,0.);
fclose(fp);
}
/* ------------------------------------ */
/* ------------------------------------ */