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example4.c
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example4.c
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// calculation example of far-field intensity distributions.
// radar chart is output for a distant scattering field.
#include "bem3_emf_b2.h"
int main(int argc,char *argv[])
{
MOBJ mo;
FILE *fp1,*fp2;
double complex e[3],h[3];
double th,ph,phd,dthd,dthr,dphr,dphd,ra,r[3],*ie,*ih,mf,iemax,ihmax;
int i,j,sn,ty;
if(argc!=2 && argc!=5){
printf("Usage : %s datafile_name [sampling_number multplier_factor type](optional)\n",argv[0]);
printf("default sampling number 360, multiplier factor 2000 (radius = 2000*lambda0), type 1 (9 or 7 point Gauss-Legendre)\n");
exit(0);
}
else if(argc==5){
sn=atoi(argv[2]);
mf=atof(argv[3]);
ty=atoi(argv[4]);
}
else{
sn=360;
mf=2000.0;
ty=1;
}
mo_dat_read(argv[1],&mo); // read data file
mo_print_data(&mo); // print data
ra=mf*mo.md[0].mw.lambda_0; // radius for calculation point
dthd=360.0/(double)sn; // delta theta [degree]
dthr=2.0*M_PI/(double)sn; // delta theta [radian]
dphd=180.0/(double)sn;
dphr=1.0*M_PI/(double)sn;
ie=(double *)m_alloc2(sn+1,sizeof(double),"example4.c,ie");
ih=(double *)m_alloc2(sn+1,sizeof(double),"example4.c,ih");
// x=0 plane, th=0 : +z-axis, th=270 : +y-axis
if((fp1=fopen("fsIe_yz.txt","wt"))==NULL){ printf("Can not open the file.\n"); exit(1); }
fprintf(fp1,"%s\n","## x=0 plane, theta=0 : +z-axis, theta=270 : +y-axis ");
fprintf(fp1,"%s %d, %s %g\n","## sampling number",sn,"multiplier factor",mf);
fprintf(fp1,"%s\n","# theta electric_field_intensity normalized_intensity");
if((fp2=fopen("fsIh_yz.txt","wt"))==NULL){ printf("Can not open the file.\n"); exit(1); }
fprintf(fp2,"%s\n","## x=0 plane, theta=0 : +z-axis, theta=270 : +y-axis ");
fprintf(fp2,"%s %d, %s %g\n","## sampling number",sn,"multiplier factor",mf);
fprintf(fp2,"%s\n","# theta magnetic_field_intensity normalized_intensity");
iemax=0.0;
ihmax=0.0;
#pragma omp parallel for schedule(dynamic) private(th,r,e,h)
for(i=0;i<sn;i++){
th=0.5*dthr+(double)i*dthr;
r[0]=0.0;
r[1]=-ra*sin(th);
r[2]= ra*cos(th);
mo_EH_mEMP_s(e,h,r,ty,&mo); // scattered field
ie[i]=creal(e[0]*conj(e[0]))+creal(e[1]*conj(e[1]))+creal(e[2]*conj(e[2]));
ih[i]=creal(h[0]*conj(h[0]))+creal(h[1]*conj(h[1]))+creal(h[2]*conj(h[2]));
#pragma omp critical
if(ie[i]>iemax) iemax=ie[i];
#pragma omp critical
if(ih[i]>ihmax) ihmax=ih[i];
}
for(i=0;i<sn;i++){
th=0.5*dthd+(double)i*dthd;
fprintf(fp1,"%g %15.14e %15.14e\n",th,ie[i],ie[i]/iemax);
fprintf(fp2,"%g %15.14e %15.14e\n",th,ih[i],ih[i]/ihmax);
}
fclose(fp1);
fclose(fp2);
// y=0 plane, th=0 : +z-axis, th=90 : +x-axis
if((fp1=fopen("fsIe_xz.txt","wt"))==NULL){ printf("Can not open the file.\n"); exit(1); }
fprintf(fp1,"%s\n","## y=0 plane, theta=0 : +z-axis, theta=90 : +x-axis ");
fprintf(fp1,"%s %d, %s %g\n","## sampling number",sn,"multiplier factor",mf);
fprintf(fp1,"%s\n","# theta electric_field_intensity normalized_intensity");
if((fp2=fopen("fsIh_xz.txt","wt"))==NULL){ printf("Can not open the file.\n"); exit(1); }
fprintf(fp2,"%s\n","## x=0 plane, theta=0 : +z-axis, theta=90 : +x-axis ");
fprintf(fp2,"%s %d, %s %g\n","## sampling number",sn,"multiplier factor",mf);
fprintf(fp2,"%s\n","# theta magnetic_field_intensity normalized_intensity");
iemax=0.0;
ihmax=0.0;
#pragma omp parallel for schedule(dynamic) private(th,r,e,h)
for(i=0;i<sn;i++){
th=0.5*dthr+(double)i*dthr;
r[0]=ra*sin(th);
r[1]=0.0;
r[2]=ra*cos(th);
mo_EH_mEMP_s(e,h,r,ty,&mo); // scattered field
ie[i]=creal(e[0]*conj(e[0]))+creal(e[1]*conj(e[1]))+creal(e[2]*conj(e[2]));
ih[i]=creal(h[0]*conj(h[0]))+creal(h[1]*conj(h[1]))+creal(h[2]*conj(h[2]));
#pragma omp critical
if(ie[i]>iemax) iemax=ie[i];
#pragma omp critical
if(ih[i]>ihmax) ihmax=ih[i];
}
for(i=0;i<sn;i++){
th=0.5*dthd+(double)i*dthd;
fprintf(fp1,"%g %15.14e %15.14e\n",th,ie[i],ie[i]/iemax);
fprintf(fp2,"%g %15.14e %15.14e\n",th,ih[i],ih[i]/ihmax);
}
fclose(fp1);
fclose(fp2);
// z=0 plane, th=0 : +x-axis, th=90 : +y-axis
if((fp1=fopen("fsIe_xy.txt","wt"))==NULL){ printf("Can not open the file.\n"); exit(1); }
fprintf(fp1,"%s\n","## z=0 plane, theta=0 : +x-axis, theta=90 : +y-axis ");
fprintf(fp1,"%s %d, %s %g\n","## sampling number",sn,"multiplier factor",mf);
fprintf(fp1,"%s\n","# theta electric_field_intensity normalized_intensity");
if((fp2=fopen("fsIh_xy.txt","wt"))==NULL){ printf("Can not open the file.\n"); exit(1); }
fprintf(fp2,"%s\n","## z=0 plane, theta=0 : +x-axis, theta=90 : +y-axis ");
fprintf(fp2,"%s %d, %s %g\n","## sampling number",sn,"multiplier factor",mf);
fprintf(fp2,"%s\n","# theta magnetic_field_intensity normalized_intensity");
iemax=0.0;
ihmax=0.0;
#pragma omp parallel for schedule(dynamic) private(th,r,e,h)
for(i=0;i<sn;i++){
th=0.5*dthr+(double)i*dthr;
r[0]=ra*cos(th);
r[1]=ra*sin(th);
r[2]=0.0;
mo_EH_mEMP_s(e,h,r,ty,&mo); // scattered field
ie[i]=creal(e[0]*conj(e[0]))+creal(e[1]*conj(e[1]))+creal(e[2]*conj(e[2]));
ih[i]=creal(h[0]*conj(h[0]))+creal(h[1]*conj(h[1]))+creal(h[2]*conj(h[2]));
#pragma omp critical
if(ie[i]>iemax) iemax=ie[i];
#pragma omp critical
if(ih[i]>ihmax) ihmax=ih[i];
}
for(i=0;i<sn;i++){
th=0.5*dthd+(double)i*dthd;
fprintf(fp1,"%g %15.14e %15.14e\n",th,ie[i],ie[i]/iemax);
fprintf(fp2,"%g %15.14e %15.14e\n",th,ih[i],ih[i]/ihmax);
}
fclose(fp1);
fclose(fp2);
// 3d plot
if((fp1=fopen("fsIe_3d.txt","wt"))==NULL){ printf("Can not open the file.\n"); exit(1); }
fprintf(fp1,"%s\n","## 3d plot, x=r*sin(theta)*cos(phi), y=r*sin(theta)*sin(phi), z=r*cos(theta), r=multiplier_factor*lambda0");
fprintf(fp1,"%s %d, %s %g\n","## sampling number",sn,"multiplier factor",mf);
fprintf(fp1,"%s\n","# theta phi electric_field_intensity");
if((fp2=fopen("fsIh_3d.txt","wt"))==NULL){ printf("Can not open the file.\n"); exit(1); }
fprintf(fp2,"%s\n","## 3d plot, x=r*sin(theta)*cos(phi), y=r*sin(theta)*sin(phi), z=r*cos(theta), r=multiplier_factor*lambda0");
fprintf(fp2,"%s %d, %s %g\n","## sampling number",sn,"multiplier factor",mf);
fprintf(fp2,"%s\n","# theta phi magnetic_field_intensity");
for(i=0;i<sn;i++){
ph =0.5*dphr+(double)i*dphr;
phd=0.5*dphd+(double)i*dphd;
#pragma omp parallel for schedule(dynamic) private(th,r,e,h)
for(j=0;j<=sn;j++){
th=(double)j*dthr;
r[0]=ra*sin(ph)*cos(th);
r[1]=ra*sin(ph)*sin(th);
r[2]=ra*cos(ph);
mo_EH_mEMP_s(e,h,r,ty,&mo); // scattered field
ie[j]=creal(e[0]*conj(e[0]))+creal(e[1]*conj(e[1]))+creal(e[2]*conj(e[2]));
ih[j]=creal(h[0]*conj(h[0]))+creal(h[1]*conj(h[1]))+creal(h[2]*conj(h[2]));
}
for(j=0;j<=sn;j++){
th=(double)j*dthd;
fprintf(fp1,"%g %g %15.14e\n",phd,th,ie[j]);
fprintf(fp2,"%g %g %15.14e\n",phd,th,ih[j]);
}
fprintf(fp1,"\n");
fprintf(fp2,"\n");
}
fclose(fp1);
fclose(fp2);
free(ie);
free(ih);
mo_finalize(&mo);
return 0;
}