| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id$"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* scanner.c - program to simulate bi-directional scanner. |
| 6 |
* |
| 7 |
* 6/10/86 |
| 8 |
*/ |
| 9 |
|
| 10 |
#include <stdio.h> |
| 11 |
|
| 12 |
#include <stdlib.h> |
| 13 |
|
| 14 |
#include <ctype.h> |
| 15 |
|
| 16 |
#include <signal.h> |
| 17 |
|
| 18 |
#include "random.h" |
| 19 |
|
| 20 |
|
| 21 |
#define PI 3.14159265358979324 |
| 22 |
|
| 23 |
#define ANGLE short |
| 24 |
#define AEND -1 |
| 25 |
|
| 26 |
#define atorad(a) ((PI/180.0) * (a)) |
| 27 |
|
| 28 |
char otcom[128] = "oconv"; |
| 29 |
char rtcom[256] = "rtrace -bf -ar .25 -ad 128"; |
| 30 |
|
| 31 |
char *sourcetemp, /* temp files */ |
| 32 |
*octreetemp; |
| 33 |
|
| 34 |
ANGLE alpha[181] = {90, AEND}; |
| 35 |
ANGLE beta[181] = {30, 60, 90, 120, 150, AEND}; |
| 36 |
ANGLE gamma[181] = {45, AEND}; |
| 37 |
|
| 38 |
char *target; /* target file name */ |
| 39 |
double targetw = 3.0; /* target width (inches) */ |
| 40 |
double targeth = 3.0; /* target height (inches) */ |
| 41 |
int xres = 16; /* x sample resolution */ |
| 42 |
int yres = 16; /* y sample resolution */ |
| 43 |
|
| 44 |
|
| 45 |
main(argc, argv) |
| 46 |
int argc; |
| 47 |
char *argv[]; |
| 48 |
{ |
| 49 |
char *strcat(), *mktemp(); |
| 50 |
int quit(); |
| 51 |
int i; |
| 52 |
|
| 53 |
signal(SIGHUP, quit); |
| 54 |
signal(SIGINT, quit); |
| 55 |
signal(SIGTERM, quit); |
| 56 |
signal(SIGXCPU, SIG_IGN); |
| 57 |
signal(SIGXFSZ, SIG_IGN); |
| 58 |
|
| 59 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 60 |
switch (argv[i][1]) { |
| 61 |
case 't': /* target */ |
| 62 |
switch (argv[i][2]) { |
| 63 |
case 'w': /* width */ |
| 64 |
targetw = atof(argv[++i]); |
| 65 |
break; |
| 66 |
case 'h': /* height */ |
| 67 |
targeth = atof(argv[++i]); |
| 68 |
break; |
| 69 |
default: |
| 70 |
goto badopt; |
| 71 |
} |
| 72 |
break; |
| 73 |
case 'a': |
| 74 |
if (!strcmp(argv[i], "-alpha")) |
| 75 |
setscan(alpha, argv[++i]); |
| 76 |
else |
| 77 |
switch (argv[i][2]) { |
| 78 |
case 'd': /* ambient divisions */ |
| 79 |
strcat(rtcom, " -ad "); |
| 80 |
strcat(rtcom, argv[++i]); |
| 81 |
break; |
| 82 |
case 'r': /* ambient radius */ |
| 83 |
strcat(rtcom, " -ar "); |
| 84 |
strcat(rtcom, argv[++i]); |
| 85 |
break; |
| 86 |
default: |
| 87 |
goto badopt; |
| 88 |
} |
| 89 |
break; |
| 90 |
case 'b': |
| 91 |
if (!strcmp(argv[i], "-beta")) |
| 92 |
setscan(beta, argv[++i]); |
| 93 |
else |
| 94 |
goto badopt; |
| 95 |
break; |
| 96 |
case 'g': |
| 97 |
if (!strcmp(argv[i], "-gamma")) |
| 98 |
setscan(gamma, argv[++i]); |
| 99 |
else |
| 100 |
goto badopt; |
| 101 |
break; |
| 102 |
case 'x': /* x resolution */ |
| 103 |
xres = atoi(argv[++i]); |
| 104 |
break; |
| 105 |
case 'y': /* y resolution */ |
| 106 |
yres = atoi(argv[++i]); |
| 107 |
break; |
| 108 |
case 'l': |
| 109 |
switch (argv[i][2]) { |
| 110 |
case 'w': /* limit weight */ |
| 111 |
strcat(rtcom, " -lw "); |
| 112 |
strcat(rtcom, argv[++i]); |
| 113 |
break; |
| 114 |
case 'r': /* limit recursion */ |
| 115 |
strcat(rtcom, " -lr "); |
| 116 |
strcat(rtcom, argv[++i]); |
| 117 |
break; |
| 118 |
default: |
| 119 |
goto badopt; |
| 120 |
} |
| 121 |
break; |
| 122 |
default:; |
| 123 |
badopt: |
| 124 |
fprintf(stderr, "%s: bad option: %s\n", |
| 125 |
argv[0], argv[i]); |
| 126 |
quit(1); |
| 127 |
} |
| 128 |
|
| 129 |
if (i >= argc) { |
| 130 |
fprintf(stderr, "%s: missing target file\n", argv[0]); |
| 131 |
quit(1); |
| 132 |
} else if (i < argc-1) { |
| 133 |
fprintf(stderr, "%s: too many target files\n", argv[0]); |
| 134 |
quit(1); |
| 135 |
} |
| 136 |
|
| 137 |
target = argv[i]; |
| 138 |
sourcetemp = mktemp("/usr/tmp/soXXXXXX"); |
| 139 |
octreetemp = mktemp("/usr/tmp/ocXXXXXX"); |
| 140 |
strcat(strcat(otcom, " "), target); |
| 141 |
strcat(strcat(otcom, " "), sourcetemp); |
| 142 |
strcat(strcat(otcom, " > "), octreetemp); |
| 143 |
strcat(strcat(rtcom, " "), octreetemp); |
| 144 |
|
| 145 |
doscan(); |
| 146 |
|
| 147 |
quit(0); |
| 148 |
} |
| 149 |
|
| 150 |
|
| 151 |
void |
| 152 |
quit(code) /* unlink temp files and exit */ |
| 153 |
int code; |
| 154 |
{ |
| 155 |
int i; |
| 156 |
|
| 157 |
unlink(sourcetemp); |
| 158 |
unlink(octreetemp); |
| 159 |
exit(code); |
| 160 |
} |
| 161 |
|
| 162 |
|
| 163 |
setscan(ang, arg) /* set up scan according to arg */ |
| 164 |
register ANGLE *ang; |
| 165 |
register char *arg; |
| 166 |
{ |
| 167 |
int start = 0, finish = -1, step = 1; |
| 168 |
|
| 169 |
for ( ; ; ) { |
| 170 |
switch (*arg) { |
| 171 |
case '\0': |
| 172 |
case ',': |
| 173 |
while (start <= finish) { |
| 174 |
*ang++ = start; |
| 175 |
start += step; |
| 176 |
} |
| 177 |
if (*arg) { |
| 178 |
arg++; |
| 179 |
continue; |
| 180 |
} else { |
| 181 |
*ang = AEND; |
| 182 |
return; |
| 183 |
} |
| 184 |
case '0': |
| 185 |
case '1': |
| 186 |
case '2': |
| 187 |
case '3': |
| 188 |
case '4': |
| 189 |
case '5': |
| 190 |
case '6': |
| 191 |
case '7': |
| 192 |
case '8': |
| 193 |
case '9': |
| 194 |
start = atoi(arg); |
| 195 |
finish = start; |
| 196 |
step = 1; |
| 197 |
break; |
| 198 |
case '-': |
| 199 |
finish = atoi(++arg); |
| 200 |
break; |
| 201 |
case ':': |
| 202 |
step = atoi(++arg); |
| 203 |
break; |
| 204 |
default: |
| 205 |
fprintf(stderr, "Scan specification error\n"); |
| 206 |
quit(1); |
| 207 |
} |
| 208 |
while (isdigit(*arg)) |
| 209 |
arg++; |
| 210 |
} |
| 211 |
} |
| 212 |
|
| 213 |
|
| 214 |
doscan() /* do scan for target */ |
| 215 |
{ |
| 216 |
FILE *fopen(), *scanstart(); |
| 217 |
double readsample(); |
| 218 |
FILE *fp; |
| 219 |
ANGLE *a, *b, *g; |
| 220 |
|
| 221 |
printf("Alpha\tBeta\tGamma\tDistribution for \"%s\"\n", target); |
| 222 |
for (g = gamma; *g != AEND; g++) { |
| 223 |
fp = scanstart(*g); |
| 224 |
for (b = beta; *b != AEND; b++) /* read data */ |
| 225 |
for (a = alpha; *a != AEND; a++) |
| 226 |
printf("%d\t%d\t%d\t%f\n", |
| 227 |
*a, *b, *g, readsample(fp)); |
| 228 |
scanend(fp); |
| 229 |
} |
| 230 |
} |
| 231 |
|
| 232 |
|
| 233 |
FILE * |
| 234 |
scanstart(g) /* open scanner pipeline */ |
| 235 |
ANGLE g; |
| 236 |
{ |
| 237 |
char *fgets(); |
| 238 |
int p1[2], p2[2]; |
| 239 |
int pid; |
| 240 |
FILE *fp; |
| 241 |
char buf[128]; |
| 242 |
|
| 243 |
makesource(g); /* make source */ |
| 244 |
if (system(otcom)) /* generate new octree */ |
| 245 |
goto err; |
| 246 |
|
| 247 |
if (pipe(p1) < 0) /* get pipe1 */ |
| 248 |
goto err; |
| 249 |
if ((pid = fork()) == 0) { /* if child1 */ |
| 250 |
close(p1[0]); |
| 251 |
if (p1[1] != 1) { /* connect stdout to pipe1 */ |
| 252 |
dup2(p1[1], 1); |
| 253 |
close(p1[1]); |
| 254 |
} |
| 255 |
if (pipe(p2) < 0) /* get pipe2 */ |
| 256 |
goto err; |
| 257 |
if ((pid = fork()) == 0) { /* if child2 */ |
| 258 |
close(p2[0]); |
| 259 |
if ((fp = fdopen(p2[1], "w")) == NULL) |
| 260 |
goto err; |
| 261 |
sendsamples(fp); /* send our samples to pipe2 */ |
| 262 |
fclose(fp); |
| 263 |
_exit(0); |
| 264 |
} |
| 265 |
if (pid == -1) |
| 266 |
goto err; |
| 267 |
close(p2[1]); |
| 268 |
|
| 269 |
if (p2[0] != 0) { /* for child1 pipe2 to stdin */ |
| 270 |
dup2(p2[0], 0); |
| 271 |
close(p2[0]); |
| 272 |
} |
| 273 |
execl("/bin/sh", "sh", "-c", rtcom, 0); /* run ray tracer */ |
| 274 |
goto err; |
| 275 |
} |
| 276 |
if (pid == -1) |
| 277 |
goto err; |
| 278 |
close(p1[1]); |
| 279 |
if ((fp = fdopen(p1[0], "r")) == NULL) /* parent reads pipe1 */ |
| 280 |
goto err; |
| 281 |
while (fgets(buf, sizeof(buf), fp) != NULL && buf[0] != '\n') |
| 282 |
/* discard header */; |
| 283 |
return(fp); |
| 284 |
err: |
| 285 |
fprintf(stderr, "System error in scanstart\n"); |
| 286 |
quit(1); |
| 287 |
} |
| 288 |
|
| 289 |
|
| 290 |
scanend(fp) /* done with scanner input */ |
| 291 |
FILE *fp; |
| 292 |
{ |
| 293 |
fclose(fp); |
| 294 |
} |
| 295 |
|
| 296 |
|
| 297 |
makesource(g) /* make a source (output normalized) */ |
| 298 |
ANGLE g; |
| 299 |
{ |
| 300 |
FILE *fp, *fopen(); |
| 301 |
double srcdir[3], sin(), cos(); |
| 302 |
|
| 303 |
srcdir[0] = sin(atorad(g)); |
| 304 |
srcdir[1] = 0.0; |
| 305 |
srcdir[2] = -cos(atorad(g)); |
| 306 |
if ((fp = fopen(sourcetemp, "w")) == NULL) { |
| 307 |
fprintf(stderr, "%s: cannot create\n", sourcetemp); |
| 308 |
quit(1); |
| 309 |
} |
| 310 |
fprintf(fp, "0 0 0 1\n"); |
| 311 |
fprintf(fp, "\nvoid light scanner_light\n"); |
| 312 |
fprintf(fp, "0\n0\n3 3283 3283 3283\n"); |
| 313 |
fprintf(fp, "\nscanner_light source scanner_source\n"); |
| 314 |
fprintf(fp, "0\n0\n4 %f %f %f 2\n", srcdir[0], srcdir[1], srcdir[2]); |
| 315 |
fclose(fp); |
| 316 |
} |
| 317 |
|
| 318 |
|
| 319 |
sendsamples(fp) /* send our samples to fp */ |
| 320 |
FILE *fp; |
| 321 |
{ |
| 322 |
ANGLE *a, *b; |
| 323 |
|
| 324 |
for (b = beta; *b != AEND; b++) |
| 325 |
for (a = alpha; *a != AEND; a++) |
| 326 |
writesample(fp, *a, *b); |
| 327 |
} |
| 328 |
|
| 329 |
|
| 330 |
writesample(fp, a, b) /* write out sample ray grid */ |
| 331 |
FILE *fp; |
| 332 |
ANGLE a, b; |
| 333 |
{ |
| 334 |
double sin(), cos(); |
| 335 |
float sp[6]; |
| 336 |
int i, j; |
| 337 |
|
| 338 |
sp[3] = -sin(atorad(b)-(PI/2.0)) * sin(atorad(a)); |
| 339 |
sp[4] = -cos(atorad(a)); |
| 340 |
sp[5] = -sin(atorad(b)) * sin(atorad(a)); |
| 341 |
|
| 342 |
for (j = 0; j < yres; j++) |
| 343 |
for (i = 0; i < xres; i++) { |
| 344 |
sp[0] = -100.0*sp[3] + |
| 345 |
(i - xres/2.0 + frandom())*targetw/xres; |
| 346 |
sp[1] = -100.0*sp[4] + |
| 347 |
(j - yres/2.0 + frandom())*targeth/yres; |
| 348 |
sp[2] = -100.0*sp[5]; |
| 349 |
fwrite(sp, sizeof(*sp), 6, fp); |
| 350 |
if (ferror(fp)) { |
| 351 |
fprintf(stderr, "Data write error\n"); |
| 352 |
quit(1); |
| 353 |
} |
| 354 |
} |
| 355 |
} |
| 356 |
|
| 357 |
|
| 358 |
double |
| 359 |
readsample(fp) /* read in sample ray grid */ |
| 360 |
FILE *fp; |
| 361 |
{ |
| 362 |
double sum; |
| 363 |
float col[3]; |
| 364 |
int i; |
| 365 |
|
| 366 |
sum = 0.0; |
| 367 |
i = xres*yres; |
| 368 |
while (i--) { |
| 369 |
if (fread(col, sizeof(*col), 3, fp) != 3) { |
| 370 |
fprintf(stderr, "Data read error\n"); |
| 371 |
quit(1); |
| 372 |
} |
| 373 |
sum += col[1]; |
| 374 |
} |
| 375 |
return(sum / (xres*yres)); |
| 376 |
} |
