int main(int argc, char **argv)
{
struct application ap; /* Structure passed between functions. */
struct rt_i *rtip;
int idx; /* Index for rt_dirbuild & rt_gettree. */
char idbuf[32]; /* Contains database name. */
struct region *pr; /* Used in finding region names. */
double rho, phi, theta;/* Spherical coordinates for starting point. */
double areabs=0.0; /* Area of bounding sphere (mm**2). */
int ians; /* Answer of question. */
double strtpt[3]; /* Starting point of ray. */
double strtdir[3]; /* Starting direction. */
size_t loops; /* Number of rays fired. */
size_t r; /* Variable in loops. */
int i, j, k; /* Variable in loops. */
long seed; /* Initial seed for random number generator. */
double denom; /* Denominator. */
double elev; /* Elevation, used to find point on yz-plane. */
double az; /* Azimuth, used to find point on yz-plane. */
double rad; /* Radius, used to find point on yz-plane. */
double s[3], t[3]; /* Temporary variables used to find points. */
double q; /* Temporary variable used to find points. */
int numreg; /* Number of regions. */
double center[3]; /* Center of the bounding rpp. */
double sf; /* Used to print shape factor. */
double dump; /* How often a dump is to occur. */
int idump; /* 1=>dump to occur. */
FILE *fp; /* Used to open files. */
char outfile[16]; /* Output file. */
FILE *fp1; /* Used to read region # & name file. */
char rnnfile[16]; /* Region # & name file. */
FILE *fp2; /* Used to write the error file. */
char errfile[16]; /* Error file. */
double totalsf; /* Sum of shape factors. */
double totalnh; /* Sum of number of hits. */
int itype; /* Type of file to be created, 0=>regular, */
/* 1=>generic. */
char line[500]; /* Buffer to read a line of data into. */
int c; /* Reads one character of information. */
int icnt; /* Counter for shape factor. */
char tmpname[150]; /* Temporary name. */
int tmpreg; /* Temporary region number. */
char rnnname[800][150]; /* Region name from region # & name file. */
int rnnnum; /* Number of regions in region # & name file. */
int rnnchar[800]; /* Number of characters in name. */
int rnnreg[800]; /* Region number from region # & name file. */
int jcnt; /* Counter. */
int equal; /* 0=>equal, 1=>not equal. */
double rcpi, rcpj; /* Used to check reciprocity. */
double rcp_diff; /* Difference in reciprocity. */
double rcp_pdiff; /* Percent difference in reciprocity. */
int ret;
struct bn_unif *msr = NULL;
/* Check to see if arguments are implemented correctly. */
if ((argc < 3 || argv[1] == NULL) || (argv[2] == NULL)) {
fprintf(stderr, "\nUsage: %s file.g objects\n\n", *argv);
} else {
/* START # 1 */
/* Ask what type of file is to be created - regular */
/* or generic. */
printf("Enter type of file to be written (0=>regular or ");
printf("1=>generic). ");
(void)fflush(stdout);
ret = scanf("%1d", &itype);
if (ret == 0)
bu_exit(-1, "scanf failure when reading file type");
if (itype != 1) itype = 0;
/* Enter names of files to be used. */
fprintf(stderr, "Enter name of output file (15 char max).\n\t");
(void)fflush(stderr);
ret = scanf("%15s", outfile);
if (ret == 0)
bu_exit(-1, "scanf failure when reading output file name");
/* Read name of the error file to be written. */
printf("Enter the name of the error file (15 char max).\n\t");
(void)fflush(stdout);
ret = scanf("%15s", errfile);
if (ret == 0)
bu_exit(-1, "scanf failure when reading error file name");
{
/* Enter name of region # & name file to be read. */
printf("Enter region # & name file to be read ");
printf("(15 char max).\n\t");
(void)fflush(stdout);
ret = scanf("%15s", rnnfile);
if (ret == 0)
bu_exit(-1, "scanf failure when reading region # + name file");
}
/* Check if dump is to occur. */
idump = 0;
printf("Do you want to dump intermediate shape factors to ");
printf("screen (0-no, 1-yes)? ");
(void)fflush(stdout);
ret = scanf("%1d", &idump);
if (ret == 0)
bu_exit(-1, "scanf failure - intermediate shape factors setting");
/* Find number of rays to be fired. */
fprintf(stderr, "Enter number of rays to be fired. ");
(void)fflush(stderr);
ret = scanf("%llu", (unsigned long long *)&loops);
if (ret == 0)
bu_exit(-1, "scanf failure - number of rays to be fired");
/* clamp loops */
if (loops > UINT32_MAX)
loops = UINT32_MAX;
/* Set seed for random number generator. */
seed = 1;
fprintf(stderr, "Do you wish to enter your own seed (0) or ");
fprintf(stderr, "use the default of 1 (1)? ");
(void)fflush(stderr);
ret = scanf("%1d", &ians);
if (ret == 0)
bu_exit(-1, "scanf failure - seed use setting");
if (ians == 0) {
fprintf(stderr, "Enter unsigned integer seed. ");
(void)fflush(stderr);
ret = scanf("%ld", &seed);
if (ret == 0)
bu_exit(-1, "scanf failure - seed");
}
msr = bn_unif_init(seed, 0);
bu_log("seed initialized\n");
/* Read region # & name file. */
rnnnum = 0;
fp1 = fopen(rnnfile, "rb");
c = getc(fp1);
while (c != EOF) {
(void)ungetc(c, fp1);
(void)bu_fgets(line, 200, fp1);
sscanf(line, "%d%149s", &tmpreg, tmpname);
for (i=0; i<150; i++) {
rnnname[rnnnum][i] = tmpname[i];
}
rnnreg[rnnnum] = tmpreg;
rnnnum++;
c = getc(fp1);
}
(void)fclose(fp1);
printf("Number of regions read from region # & name file: %d\n", rnnnum);
(void)fflush(stdout);
/* Find number of characters in each region name. */
for (i=0; i<rnnnum; i++) {
jcnt = 0;
while (rnnname[i][jcnt] != '\0') {
jcnt++;
}
rnnchar[i] = jcnt;
}
/* Build directory. */
idx = 1; /* Set index for rt_dirbuild. */
rtip = rt_dirbuild(argv[idx], idbuf, sizeof(idbuf));
printf("Database Title: %s\n", idbuf);
(void)fflush(stdout);
/* Set useair to 1 to show hits of air. */
rtip->useair = 1;
/* Load desired objects. */
idx = 2; /* Set index. */
while (argv[idx] != NULL) {
rt_gettree(rtip, argv[idx]);
idx += 1;
}
/* Find number of regions. */
numreg = (int)rtip->nregions;
fprintf(stderr, "Number of regions: %d\n", numreg);
(void)fflush(stderr);
/* Zero all arrays. */
for (i=0; i<numreg; i++) {
info[i].name = "\0";
info[i].regnum = (-1);
info[i].numchar = 0;
info[i].lvrays = 0.0;
info[i].engarea = 0.0;
for (j=0; j<numreg; j++) {
info[i].intrays[j] = 0.0;
}
}
nummiss = 0.0;
/* Get database ready by starting prep. */
rt_prep(rtip);
/* Find the center of the bounding rpp. */
center[X] = rtip->mdl_min[X] +
(rtip->mdl_max[X] - rtip->mdl_min[X]) / 2.0;
center[Y] = rtip->mdl_min[Y] +
(rtip->mdl_max[Y] - rtip->mdl_min[Y]) / 2.0;
center[Z] = rtip->mdl_min[Z] +
(rtip->mdl_max[Z] - rtip->mdl_min[Z]) / 2.0;
/* Put region names into structure. */
pr = BU_LIST_FIRST(region, &rtip->HeadRegion);
for (i=0; i<numreg; i++) {
info[(int)(pr->reg_bit)].name = pr->reg_name;
pr = BU_LIST_FORW(region, &(pr->l));
}
/* Set up parameters for rt_shootray. */
RT_APPLICATION_INIT(&ap);
ap.a_hit = hit; /* User supplied hit function. */
ap.a_miss = miss; /* User supplied miss function. */
ap.a_overlap = overlap; /* User supplied overlap function. */
ap.a_rt_i = rtip; /* Pointer from rt_dirbuild. */
ap.a_onehit = 0; /* Look at all hits. */
ap.a_level = 0; /* Recursion level for diagnostics. */
ap.a_resource = 0; /* Address for resource structure. */
dump = 1000000.0; /* Used for dumping info. */
for (r=0; r<loops; r++) {
/* Number of rays fired. */
/* START # 2 */
/* Find length of 'diagonal' (rho). (In reality rho is */
/* the radius of bounding sphere). */
rho = (rtip->mdl_max[X] - rtip->mdl_min[X])
* (rtip->mdl_max[X] - rtip->mdl_min[X])
+(rtip->mdl_max[Y] - rtip->mdl_min[Y])
* (rtip->mdl_max[Y] - rtip->mdl_min[Y])
+(rtip->mdl_max[Z] - rtip->mdl_min[Z])
* (rtip->mdl_max[Z] - rtip->mdl_min[Z]);
rho = sqrt(rho) / 2.0 + .5;
/* find surface area of bounding sphere. */
areabs = 4.0 * M_PI * rho * rho;
/* Second way to find starting point and direction. */
/* This approach finds the starting point and direction */
/* by using parallel rays. */
/* Find point on the bounding sphere. (The negative */
/* of the unit vector of this point will eventually be */
/* the firing direction. */
q = BN_UNIF_DOUBLE(msr) + 0.5;
theta = q * M_2PI;
q = BN_UNIF_DOUBLE(msr) + 0.5;
phi = (q * 2.0) - 1.0;
phi = acos(phi);
strtdir[X] = rho * sin(phi) * cos(theta);
strtdir[Y] = rho * sin(phi) * sin(theta);
strtdir[Z] = rho * cos(phi);
/* Elevation and azimuth for finding a vector in a plane. */
elev = M_PI_2 - phi;
az = theta;
/* Find vector in yz-plane. */
q = BN_UNIF_DOUBLE(msr) + 0.5;
theta = q * M_2PI;
q = BN_UNIF_DOUBLE(msr) + 0.5;
rad = rho * sqrt(q);
s[X] = 0.0;
s[Y] = rad * cos(theta);
s[Z] = rad * sin(theta);
/* Rotate vector. */
t[X] = s[X] * cos(elev) * cos(az) - s[Z] * sin(elev) * cos(az)
- s[Y] * sin(az);
t[Y] = s[X] * cos(elev) * sin(az) - s[Z] * sin(elev) * sin(az)
+ s[Y] * cos(az);
t[Z] = s[X] * sin(elev) + s[Z] * cos(elev);
/* Translate the point. This is starting point. */
strtpt[X] = t[X] + strtdir[X];
strtpt[Y] = t[Y] + strtdir[Y];
strtpt[Z] = t[Z] + strtdir[Z];
/* Now transfer starting point so that it is in */
/* the absolute coordinates not the origin's. */
strtpt[X] += center[X];
strtpt[Y] += center[Y];
strtpt[Z] += center[Z];
/* Normalize starting direction and make negative. */
denom = strtdir[X] * strtdir[X] +
strtdir[Y] * strtdir[Y] +
strtdir[Z] * strtdir[Z];
denom = sqrt(denom);
strtdir[X] /= (-denom);
strtdir[Y] /= (-denom);
strtdir[Z] /= (-denom);
/* Set up firing point and direction. */
ap.a_ray.r_pt[X] = strtpt[X];
ap.a_ray.r_pt[Y] = strtpt[Y];
ap.a_ray.r_pt[Z] = strtpt[Z];
ap.a_ray.r_dir[X] = strtdir[X];
ap.a_ray.r_dir[Y] = strtdir[Y];
ap.a_ray.r_dir[Z] = strtdir[Z];
/* Call rt_shootray for "forward ray". */
(void)rt_shootray(&ap);
if (EQUAL(r, (dump - 1.0))) {
printf("%llu rays have been fired in forward direction.\n",
(unsigned long long)(r+1));
(void)fflush(stdout);
if (idump == 1) {
/* START # 3 */
printf("\n****************************************");
printf("****************************************\n");
(void)fflush(stdout);
/* Dump info to file. */
for (i=0; i<numreg; i++) {
for (j=0; j<numreg; j++) {
sf = 0.0;
if ((info[i].lvrays < -ZEROTOL) || (ZEROTOL <
info[i].lvrays))
sf = info[i].intrays[j] / info[i].lvrays;
printf("%d\t%d\t%f\n", i, j, sf);
(void)fflush(stdout);
}
}
} /* START # 3 */
dump = dump + 1000000.0;
}
} /* END # 2 */
/* Find area bounded by engine air using Monte Carlo method. */
for (i=0; i<numreg; i++) {
/* Old way, only incrementing info[i].allvrays for forward */
/* ray therefore do not divide by 2. Division by 2 is to */
/* include the backwards ray also. */
/*
* info[i].engarea = info[i].allvrays * areabs / loops / 2.0;
*/
info[i].engarea = info[i].allvrays * areabs / (double)loops;
/* Put area into square meters. */
info[i].engarea *= 1.e-6;
}
/* Find number of characters in each region name. */
for (i=0; i<numreg; i++) {
jcnt = 0;
while (info[i].name[jcnt] != '\0') {
jcnt++;
}
info[i].numchar = jcnt;
}
/* Find correct region number. */
printf("Finding correct region numbers.\n");
(void)fflush(stdout);
for (i=0; i<numreg; i++) {
for (j=0; j<rnnnum; j++) {
equal = 0; /* 1=>not equal. */
jcnt = rnnchar[j];
for (k=info[i].numchar; k>=0; k--) {
if (jcnt<0) equal = 1;
else if (info[i].name[k] != rnnname[j][jcnt])
equal = 1;
jcnt--;
}
if (equal == 0) info[i].regnum = rnnreg[j];
}
}
printf("Finished finding correct region numbers.\n");
(void)fflush(stdout);
/******************************************************************/
/* Check for reciprocity. */
/* Open error file. */
fp2 = fopen(errfile, "wb");
fprintf(fp2, "\nError file for shapefact.\n");
fprintf(fp2, "Shape factor file created: %s\n\n", outfile);
fprintf(fp2, "Regions with reciprocity errors greater ");
fprintf(fp2, "than 10%%.\n\n");
(void)fflush(fp2);
for (i=0; i<numreg; i++) {
for (j=0; j<numreg; j++) {
rcpi = 0.0;
rcpj = 0.0;
if ((info[i].lvrays < -ZEROTOL) || (ZEROTOL < info[i].lvrays))
rcpi = info[i].intrays[j] * info[i].engarea /info[i].lvrays;
if ((info[j].lvrays < -ZEROTOL) || (ZEROTOL < info[j].lvrays))
rcpj = info[j].intrays[i] * info[j].engarea /info[j].lvrays;
rcp_diff = rcpi - rcpj;
if (rcp_diff < 0.0) rcp_diff = (-rcp_diff);
if ((rcpi < -ZEROTOL) || (ZEROTOL < rcpi))
rcp_pdiff = rcp_diff / rcpi;
else rcp_pdiff = 0.0; /* Don't divide by 0. */
/* Print reciprocity errors greater than 10%. */
if (rcp_pdiff > 0.1) {
fprintf(fp2, "%d %d %f %f %f %f\n",
info[i].regnum, info[j].regnum, rcpi, rcpj, rcp_diff,
(rcp_pdiff * 100.0));
(void)fflush(fp2);
}
}
}
/* Close error file. */
(void)fclose(fp2);
/******************************************************************/
/* Print out shape factor to regular output file. */
if (itype == 0) {
fp = fopen(outfile, "wb");
fprintf(fp, "Number of forward rays fired: %llu\n\n", (unsigned long long)loops);
(void)fflush(fp);
/* Print out structure. */
for (i=0; i<numreg; i++) {
/* Print region number, region name, & engine area. */
fprintf(fp, "%d\t%s\t%e\n",
info[i].regnum, info[i].name, info[i].engarea);
(void)fflush(fp);
/* Zero sums for shape factors & rays hit. */
totalsf = 0.0;
totalnh = 0.0;
for (j=0; j<numreg; j++) {
sf = 0.0;
if ((info[i].lvrays < -ZEROTOL) || (ZEROTOL <
info[i].lvrays))
sf = info[i].intrays[j] / info[i].lvrays;
/* Print region number & shape factor. */
fprintf(fp, " %d\t%e\n",
info[j].regnum, sf);
(void)fflush(fp);
/* Add to sum of shape factors & number of hits. */
totalsf += sf;
totalnh += info[i].intrays[j];
}
/* Print sum of hits & sum of shape factors. */
fprintf(fp, " sum of hits: %f\n", totalnh);
fprintf(fp, " sum of shape factors: %f\n\n", totalsf);
(void)fflush(fp);
}
(void)fclose(fp);
}
/******************************************************************/
/* Create and write to generic shape factor file. */
if (itype == 1) {
fp = fopen(outfile, "wb");
for (i=0; i<numreg; i++) {
/* Count the number of shape factors. */
icnt = 0;
for (j=0; j<numreg; j++) {
if (info[i].intrays[j] > ZEROTOL) icnt++;
}
/* Print the # 5, region number (matches firpass & */
/* secpass), engine area, & number of shape factors. */
fprintf(fp, " 5 %d %e %d\n",
info[i].regnum, info[i].engarea, icnt);
(void)fflush(fp);
for (j=0; j<numreg; j++) {
if (info[i].intrays[j] > ZEROTOL) {
sf = info[i].intrays[j] / info[i].lvrays;
/* Print each region # & shape factor. */
fprintf(fp, " %d %e\n", info[j].regnum, sf);
(void)fflush(fp);
}
}
}
(void)fclose(fp);
}
} /* END # 1 */
return 0;
}
int main(int argc, char **argv)
{
/* START # 99 */
struct application ap; /* Structure passed between functions. */
struct rt_i *rtip; /* Used to build directory. */
int index; /* Index for rt_dirbuild & rt_gettree. */
char idbuf[32]; /* Contains data base info. */
struct region *pr; /* Used in finding region names. */
int numreg; /* Number of regions. */
double centall[3]; /* Center of entire model. */
double minall[3]; /* Minimum of entire model. */
double maxall[3]; /* Maximum of entire model. */
double areaall; /* Surface area of bounding sphere. */
double radall; /* Radius of bounding sphere. */
long seed; /* Seed for random number generator. */
double rayfir; /* Number of rays to be fired. */
double rho, phi, theta;/* Spherical coordinates for starting point. */
double elev, az, rds; /* Elevation, azimuth, & radius for finding vector */
/* in yz-plane. */
double strtpt[3]; /* Starting point. */
double strtdir[3]; /* Starting direction. */
double denom; /* Denominator. */
int ians; /* Answer to question. */
int i, j, k, m; /* Loop counters. */
double r; /* Loop counter. */
double q; /* Temporary variable. */
double s[3], t[3]; /* Temporary variables. */
FILE *fpw; /* Allows a file to be written. */
char outfile[26]; /* Output file name. */
char errfile[26]; /* Error file name. */
FILE *fpw2; /* Allows a file to be written. */
char lwxfile[26]; /* Longwave radiation exchange file for PRISM */
/* (not quite PRISM ready). */
struct bn_unif *msr = NULL;
/* Check to see if arguments are implimented correctly. */
if ( (argv[1] == NULL) || (argv[2] == NULL) )
{
(void)fprintf(stderr, "\nusage: %s file.g objects\n\n", *argv);
}
else
{
/* START # 100 */
/* Find name of output file. */
(void)printf("Enter name of output file (25 char max).\n\t");
(void)fflush(stdout);
(void)scanf("%25s", outfile);
/* Find name of longwave radiation exchange (lwx) file */
/* for use with PRISM (not quite PRISM ready). */
(void)printf("Enter name of longwave radiation exchange");
(void)printf(" file (25 char max).\n\t");
(void)fflush(stdout);
(void)scanf("%25s", lwxfile);
/* Find name of error file. */
(void)printf("Enter name of error file (25 char max).\n\t");
(void)fflush(stdout);
(void)scanf("%25s", errfile);
/* Open files. */
fpw = fopen(outfile, "w");
fpw1 = fopen(errfile, "w");
fpw2 = fopen(lwxfile, "w");
/* Write info to output & error file. */
(void)fprintf(fpw, "\n.g file used: %s\n", argv[1]);
(void)fprintf(fpw, "regions used:\n");
(void)fprintf(fpw1, "\n.g file used: %s\n", argv[1]);
(void)fprintf(fpw1, "regions used:\n");
i = 2;
while (argv[i] != NULL)
{
(void)fprintf(fpw, "\t%s\n", argv[i]);
(void)fprintf(fpw1, "\t%s\n", argv[i]);
i++;
}
(void)fprintf(fpw, "output file created: %s\n", outfile);
(void)fprintf(fpw, "error file created: %s\n", errfile);
(void)fprintf(fpw, "lwx file created: %s\n", errfile);
(void)fflush(fpw);
(void)fprintf(fpw1, "output file created: %s\n", outfile);
(void)fprintf(fpw1, "error file created: %s\n", errfile);
(void)fprintf(fpw1, "lwx file created: %s\n", errfile);
(void)fflush(fpw1);
/* Build directory. */
index = 1; /* Set index for rt_dirbuild. */
rtip = rt_dirbuild(argv[index], idbuf, sizeof(idbuf));
(void)printf("Database Title: %s\n", idbuf);
(void)fflush(stdout);
/* Set useair to 0 to show no hits of air. */
rtip->useair = 0;
/* Load desired objects. */
index = 2; /* Set index. */
while (argv[index] != NULL)
{
rt_gettree(rtip, argv[index]);
index += 1;
}
/* Find number of regions. */
numreg = (int)rtip->nregions;
(void)fprintf(stderr, "Number of regions: %d\n", numreg);
(void)fflush(stderr);
/* Malloc everything now that the number of regions is known. */
info = (struct table *)bu_malloc(numreg * sizeof(*info), "info");
for (i=0; i<numreg; i++)
{
info[i].intrays = (double *)bu_malloc(numreg * sizeof(double), "info[i].intrays");
info[i].sf = (double *)bu_malloc(numreg * sizeof(double), "info[i].sf");
}
/* Zero all arrays. */
for (i=0; i<numreg; i++)
{
/* START # 110 */
info[i].name = "\0";
info[i].lvrays = 0.;
for (j=0; j<numreg; j++)
{
info[i].intrays[j] = 0.;
info[i].sf[j] = 0.;
}
info[i].regarea = 0.;
} /* END # 110 */
/* Get database ready by starting prep. */
rt_prep(rtip);
/* Find the center of the bounding rpp of entire model. */
centall[X] = rtip->mdl_min[X] +
(rtip->mdl_max[X] - rtip->mdl_min[X]) / 2.;
centall[Y] = rtip->mdl_min[Y] +
(rtip->mdl_max[Y] - rtip->mdl_min[Y]) / 2.;
centall[Z] = rtip->mdl_min[Z] +
(rtip->mdl_max[Z] - rtip->mdl_min[Z]) / 2.;
/* Find minimum and maximum of entire model. */
minall[X] = rtip->mdl_min[X];
minall[Y] = rtip->mdl_min[Y];
minall[Z] = rtip->mdl_min[Z];
maxall[X] = rtip->mdl_max[X];
maxall[Y] = rtip->mdl_max[Y];
maxall[Z] = rtip->mdl_max[Z];
/* Find radius of bounding sphere. */
radall = (maxall[X] - minall[X]) * (maxall[X] - minall[X])
+ (maxall[Y] - minall[Y]) * (maxall[Y] - minall[Y])
+ (maxall[Z] - minall[Z]) * (maxall[Z] - minall[Z]);
/* Add .5 to make sure completely outside the rpp. */
radall = sqrt(radall) / 2. + .5;
/* Find surface area of bounding sphere. */
areaall = 4 * M_PI * radall * radall;
/* Print info on min, max, center, radius, & surface area */
/* of entire model. */
(void)printf("Min & max for entire model.\n");
(void)printf("\tX: %f - %f\n", minall[X], maxall[X]);
(void)printf("\tY: %f - %f\n", minall[Y], maxall[Y]);
(void)printf("\tZ: %f - %f\n", minall[Z], maxall[Z]);
(void)printf("Center: %f, %f, %f\n\n", centall[X], centall[Y],
centall[Z]);
(void)printf("Radius: %f\n", radall);
(void)printf("Surface Area: %f\n\n", areaall);
(void)fflush(stdout);
/* Find number of rays to fire. */
(void)printf("Enter the number of rays to be fired.\n\t");
(void)fflush(stdout);
(void)scanf("%lf", &rayfir);
/* Write info to files. */
(void)fprintf(fpw, "Min & max for entire region:\n");
(void)fprintf(fpw, "\tX: %f - %f\n", minall[X], maxall[X]);
(void)fprintf(fpw, "\tY: %f - %f\n", minall[Y], maxall[Y]);
(void)fprintf(fpw, "\tZ: %f - %f\n", minall[Z], maxall[Z]);
(void)fprintf(fpw, "Center: %f, %f, %f\n", centall[X],
centall[Y], centall[Z]);
(void)fprintf(fpw, "Radius: %f\n", radall);
(void)fprintf(fpw, "Surface area: %f\n", areaall);
(void)fprintf(fpw, "Number of rays fired: %f\n\n", rayfir);
(void)fflush(fpw);
(void)fprintf(fpw1, "Min & max for entire region:\n");
(void)fprintf(fpw1, "\tX: %f - %f\n", minall[X], maxall[X]);
(void)fprintf(fpw1, "\tY: %f - %f\n", minall[Y], maxall[Y]);
(void)fprintf(fpw1, "\tZ: %f - %f\n", minall[Z], maxall[Z]);
(void)fprintf(fpw1, "Center: %f, %f, %f\n", centall[X],
centall[Y], centall[Z]);
(void)fprintf(fpw1, "Radius: %f\n", radall);
(void)fprintf(fpw1, "Surface area: %f\n", areaall);
(void)fprintf(fpw1, "Number of rays fired: %f\n\n", rayfir);
(void)fflush(fpw1);
/* Put region names into structure. */
pr = BU_LIST_FIRST(region, &rtip->HeadRegion);
for (i=0; i<numreg; i++)
{
info[(int)(pr->reg_bit)].name = pr->reg_name;
pr = BU_LIST_FORW(region, &(pr->l) );
}
(void)printf("Region names in structure.\n");
(void)fflush(stdout);
/* Write region names to error file. */
for (i=0; i<numreg; i++)
{
(void)fprintf(fpw1, "region %d: %s\n", (i + 1), info[i].name);
(void)fflush(fpw1);
}
(void)fprintf(fpw1, "\n");
(void)fflush(fpw1);
/* Set seed for random number generator. */
seed = 1;
(void)printf("Do you wish to enter your own seed (0) or ");
(void)printf("use the default of 1 (1)?\n\t");
(void)fflush(stdout);
(void)scanf("%d", &ians);
if (ians == 0)
{
(void)printf("Enter unsigned integer seed.\n\t");
(void)fflush(stdout);
(void)scanf("%ld", &seed);
}
msr = bn_unif_init(seed, 0);
(void)printf("Seed initialized\n");
(void)fflush(stdout);
/* Set up parameters for rt_shootray. */
RT_APPLICATION_INIT(&ap);
ap.a_hit = hit; /* User supplied hit func. */
ap.a_miss = miss; /* User supplied miss func. */
ap.a_overlap = overlap; /* User supplied overlap func. */
ap.a_rt_i = rtip; /* Pointer from rt_dirbuild. */
ap.a_onehit = 0; /* Look at all hits. */
ap.a_level = 0; /* Recursion level for diagnostics. */
ap.a_resource = 0; /* Address for resource struct. */
/*
* (void)printf("Parameters for rt_shootray set.\n");
* (void)fflush(stdout);
*/
/* Loop through for each ray fired. */
for (r=0; r<rayfir; r++)
{
/* START # 150 */
/*
* (void)printf("In loop - %f\n", r);
* (void)fflush(stdout);
*/
/* Find point on the bounding sphere. The negative */
/* of the unit vector of this point will be the */
/* firing direction. */
q = BN_UNIF_DOUBLE(msr) + 0.5;
theta = q * 2. * M_PI;
q = BN_UNIF_DOUBLE(msr) + 0.5;
phi = (q * 2.) - 1.;
phi = acos(phi);
rho = radall;
strtdir[X] = rho * sin(phi) * cos(theta);
strtdir[Y] = rho * sin(phi) * sin(theta);
strtdir[Z] = rho * cos(phi);
/* Elevation & azimuth for finding a vector in a plane. */
elev = M_PI / 2. - phi;
az = theta;
/* Find vector in yz-plane. */
q = BN_UNIF_DOUBLE(msr) + 0.5;
theta = q * 2. * M_PI;
q = BN_UNIF_DOUBLE(msr) + 0.5;
rds = rho * sqrt(q);
s[X] = 0.;
s[Y] = rds * cos(theta);
s[Z] = rds * sin(theta);
/* Rotate vector. */
t[X] = s[X] * cos(elev) * cos(az) - s[Z] * sin(elev) * cos(az)
- s[Y] * sin(az);
t[Y] = s[X] * cos(elev) * sin(az) - s[Z] * sin(elev) * sin(az)
+ s[Y] * cos(az);
t[Z] = s[X] * sin(elev) + s[Z] * cos(elev);
/* Translate the point. This is the starting point. */
strtpt[X] = t[X] + strtdir[X];
strtpt[Y] = t[Y] + strtdir[Y];
strtpt[Z] = t[Z] + strtdir[Z];
/* Now transfer the starting point so that it is in the */
/* absolute coordinates not the origin's. */
strtpt[X] += centall[X];
strtpt[Y] += centall[Y];
strtpt[Z] += centall[Z];
/* Normalize starting direction & make negative. */
denom = strtdir[X] *strtdir[X] +
strtdir[Y] *strtdir[Y] +
strtdir[Z] *strtdir[Z];
denom = sqrt(denom);
strtdir[X] /= (-denom);
strtdir[Y] /= (-denom);
strtdir[Z] /= (-denom);
/* Set up firing point & direction. */
ap.a_ray.r_pt[X] = strtpt[X];
ap.a_ray.r_pt[Y] = strtpt[Y];
ap.a_ray.r_pt[Z] = strtpt[Z];
ap.a_ray.r_dir[X] = strtdir[X];
ap.a_ray.r_dir[Y] = strtdir[Y];
ap.a_ray.r_dir[Z] = strtdir[Z];
/*
* (void)printf("Calling rt_shootray.\n");
* (void)fflush(stdout);
*/
/* Call rt_shootray. */
(void)rt_shootray(&ap);
/*
* (void)printf("Rt_shootray finished.\n");
* (void)fflush(stdout);
*/
} /* END # 150 */
/*
* (void)printf("Finished loop.\n");
* (void)fflush(stdout);
*/
for (i=0; i<numreg; i++)
{
/* START # 160 */
/* Write region names to output file. */
(void)fprintf(fpw, "Region %d: %s\n", (i+1), info[i].name);
(void)fflush(fpw);
/* Find shape factors & print. */
if (info[i].lvrays == 0)
{
/* START # 1060 */
(void)fprintf(fpw1, "** ERROR - # or rays hitting region ");
(void)fprintf(fpw1, "%d is 0. **\n", i);
(void)fflush(fpw1);
} /* END # 1060 */
else
{
/* START # 1070 */
/* Must divide by 2. since looking forwards & backwards. */
info[i].regarea = info[i].lvrays / rayfir * areaall / 2.;
for (j=0; j<numreg; j++)
{
/* START # 1080 */
info[i].sf[j] = info[i].intrays[j] / info[i].lvrays;
(void)fprintf(fpw, "\t%d %d %f\n",
(i + 1), (j + 1), info[i].sf[j]);
(void)fflush(fpw);
(void)fprintf(fpw1, "reg %d - reg %d - rays leave ",
(i + 1), (j + 1));
(void)fprintf(fpw1, "& int %f - rays leave %f ",
info[i].intrays[j], info[i].lvrays);
(void)fprintf(fpw1, "- sf %f - area %f\n",
info[i].sf[j], info[i].regarea);
(void)fflush(fpw1);
} /* END # 1080 */
} /* END # 1070 */
} /* END # 160 */
/* Write lwx file. */
(void)fprintf(fpw2, "Longwave Radiation Exchange Factors ");
(void)fprintf(fpw2, "for %s\n", argv[1]);
(void)fprintf(fpw2, "Number of Regions = %4d\n", numreg);
(void)fprintf(fpw2, "TEMIS\n\n");
for (i=0; i<numreg; i++)
{
/* START # 1090 */
(void)fprintf(fpw2, "Region\tArea\tEmissivity\n");
/* Area is put into square meters. */
(void)fprintf(fpw2, "%d\t%f\n", (i + 1),
(info[i].regarea / 1000. / 1000.));
/* Count the number of shape factors. */
k = 0;
for (j=0; j<numreg; j++)
{
if (info[i].sf[j] != 0.) k++;
}
(void)fprintf(fpw2, "Bij\t%d\n", k);
/* Print shape factors. */
m = 0;
for (j=0; j<numreg; j++)
{
/* START # 1100 */
if (info[i].sf[j] != 0.)
{
/* START # 1110 */
(void)fprintf(fpw2, "%4d %.4f ", (j + 1),
info[i].sf[j]);
m++;
if (m == 5)
{
/* START # 1120 */
m = 0;
(void)fprintf(fpw2, "\n");
} /* END # 1120 */
} /* END # 1110 */
} /* END # 1100 */
if (m != 0) (void)fprintf(fpw2, "\n");
(void)fprintf(fpw2, " Gnd Sky\n\n");
(void)fflush(fpw2);
} /* END # 1090 */
/* free memory */
for (i=0; i<numreg; i++)
{
bu_free(info[i].intrays, "info[i].intrays");
bu_free(info[i].sf, "info[i].sf");
}
bu_free(info, "info");
/* Close files. */
(void)fclose(fpw);
(void)fclose(fpw1);
(void)fclose(fpw2);
} /* END # 100 */
return 0;
} /* END # 99 */
