1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id$"; |
3 |
#endif |
4 |
/* |
5 |
* rtrace.c - program and variables for individual ray tracing. |
6 |
*/ |
7 |
|
8 |
/* ==================================================================== |
9 |
* The Radiance Software License, Version 1.0 |
10 |
* |
11 |
* Copyright (c) 1990 - 2002 The Regents of the University of California, |
12 |
* through Lawrence Berkeley National Laboratory. All rights reserved. |
13 |
* |
14 |
* Redistribution and use in source and binary forms, with or without |
15 |
* modification, are permitted provided that the following conditions |
16 |
* are met: |
17 |
* |
18 |
* 1. Redistributions of source code must retain the above copyright |
19 |
* notice, this list of conditions and the following disclaimer. |
20 |
* |
21 |
* 2. Redistributions in binary form must reproduce the above copyright |
22 |
* notice, this list of conditions and the following disclaimer in |
23 |
* the documentation and/or other materials provided with the |
24 |
* distribution. |
25 |
* |
26 |
* 3. The end-user documentation included with the redistribution, |
27 |
* if any, must include the following acknowledgment: |
28 |
* "This product includes Radiance software |
29 |
* (http://radsite.lbl.gov/) |
30 |
* developed by the Lawrence Berkeley National Laboratory |
31 |
* (http://www.lbl.gov/)." |
32 |
* Alternately, this acknowledgment may appear in the software itself, |
33 |
* if and wherever such third-party acknowledgments normally appear. |
34 |
* |
35 |
* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
36 |
* and "The Regents of the University of California" must |
37 |
* not be used to endorse or promote products derived from this |
38 |
* software without prior written permission. For written |
39 |
* permission, please contact [email protected]. |
40 |
* |
41 |
* 5. Products derived from this software may not be called "Radiance", |
42 |
* nor may "Radiance" appear in their name, without prior written |
43 |
* permission of Lawrence Berkeley National Laboratory. |
44 |
* |
45 |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
46 |
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
47 |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
48 |
* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
49 |
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
50 |
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
51 |
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
52 |
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
53 |
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
54 |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
55 |
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
56 |
* SUCH DAMAGE. |
57 |
* ==================================================================== |
58 |
* |
59 |
* This software consists of voluntary contributions made by many |
60 |
* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
61 |
* information on Lawrence Berkeley National Laboratory, please see |
62 |
* <http://www.lbl.gov/>. |
63 |
*/ |
64 |
|
65 |
/* |
66 |
* Input is in the form: |
67 |
* |
68 |
* xorg yorg zorg xdir ydir zdir |
69 |
* |
70 |
* The direction need not be normalized. Output is flexible. |
71 |
* If the direction vector is (0,0,0), then the output is flushed. |
72 |
* All values default to ascii representation of real |
73 |
* numbers. Binary representations can be selected |
74 |
* with '-ff' for float or '-fd' for double. By default, |
75 |
* radiance is computed. The '-i' or '-I' options indicate that |
76 |
* irradiance values are desired. |
77 |
*/ |
78 |
|
79 |
#include "ray.h" |
80 |
|
81 |
#include "otypes.h" |
82 |
|
83 |
#include "resolu.h" |
84 |
|
85 |
CUBE thescene; /* our scene */ |
86 |
OBJECT nsceneobjs; /* number of objects in our scene */ |
87 |
|
88 |
int dimlist[MAXDIM]; /* sampling dimensions */ |
89 |
int ndims = 0; /* number of sampling dimensions */ |
90 |
int samplendx = 0; /* index for this sample */ |
91 |
|
92 |
int imm_irrad = 0; /* compute immediate irradiance? */ |
93 |
int lim_dist = 0; /* limit distance? */ |
94 |
|
95 |
int inform = 'a'; /* input format */ |
96 |
int outform = 'a'; /* output format */ |
97 |
char *outvals = "v"; /* output specification */ |
98 |
|
99 |
int do_irrad = 0; /* compute irradiance? */ |
100 |
|
101 |
void (*trace)() = NULL; /* trace call */ |
102 |
|
103 |
extern void ambnotify(), tranotify(); |
104 |
void (*addobjnotify[])() = {ambnotify, tranotify, NULL}; |
105 |
char *tralist[128]; /* list of modifers to trace (or no) */ |
106 |
int traincl = -1; /* include == 1, exclude == 0 */ |
107 |
#define MAXTSET 511 /* maximum number in trace set */ |
108 |
OBJECT traset[MAXTSET+1]={0}; /* trace include/exclude set */ |
109 |
|
110 |
int hresolu = 0; /* horizontal (scan) size */ |
111 |
int vresolu = 0; /* vertical resolution */ |
112 |
|
113 |
double dstrsrc = 0.0; /* square source distribution */ |
114 |
double shadthresh = .05; /* shadow threshold */ |
115 |
double shadcert = .5; /* shadow certainty */ |
116 |
int directrelay = 2; /* number of source relays */ |
117 |
int vspretest = 512; /* virtual source pretest density */ |
118 |
int directvis = 1; /* sources visible? */ |
119 |
double srcsizerat = .2; /* maximum ratio source size/dist. */ |
120 |
|
121 |
COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
122 |
COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
123 |
double seccg = 0.; /* global scattering eccentricity */ |
124 |
double ssampdist = 0.; /* scatter sampling distance */ |
125 |
|
126 |
double specthresh = .15; /* specular sampling threshold */ |
127 |
double specjitter = 1.; /* specular sampling jitter */ |
128 |
|
129 |
int backvis = 1; /* back face visibility */ |
130 |
|
131 |
int maxdepth = 6; /* maximum recursion depth */ |
132 |
double minweight = 4e-3; /* minimum ray weight */ |
133 |
|
134 |
char *ambfile = NULL; /* ambient file name */ |
135 |
COLOR ambval = BLKCOLOR; /* ambient value */ |
136 |
int ambvwt = 0; /* initial weight for ambient value */ |
137 |
double ambacc = 0.2; /* ambient accuracy */ |
138 |
int ambres = 128; /* ambient resolution */ |
139 |
int ambdiv = 512; /* ambient divisions */ |
140 |
int ambssamp = 0; /* ambient super-samples */ |
141 |
int ambounce = 0; /* ambient bounces */ |
142 |
char *amblist[128]; /* ambient include/exclude list */ |
143 |
int ambincl = -1; /* include == 1, exclude == 0 */ |
144 |
|
145 |
|
146 |
static RAY thisray; /* for our convenience */ |
147 |
|
148 |
static void oputo(), oputd(), oputv(), oputl(), oputL(), |
149 |
oputp(), oputn(), oputN(), oputs(), oputw(), oputm(); |
150 |
|
151 |
static void ourtrace(), tabin(); |
152 |
static void (*ray_out[16])(), (*every_out[16])(); |
153 |
static int castonly = 0; |
154 |
|
155 |
static void puta(), putf(), putd(); |
156 |
|
157 |
static void (*putreal)(); |
158 |
|
159 |
void bogusray(), rad(), irrad(), printvals(); |
160 |
|
161 |
|
162 |
void |
163 |
quit(code) /* quit program */ |
164 |
int code; |
165 |
{ |
166 |
#ifndef NIX |
167 |
headclean(); /* delete header file */ |
168 |
pfclean(); /* clean up persist files */ |
169 |
#endif |
170 |
exit(code); |
171 |
} |
172 |
|
173 |
|
174 |
char * |
175 |
formstr(f) /* return format identifier */ |
176 |
int f; |
177 |
{ |
178 |
switch (f) { |
179 |
case 'a': return("ascii"); |
180 |
case 'f': return("float"); |
181 |
case 'd': return("double"); |
182 |
case 'c': return(COLRFMT); |
183 |
} |
184 |
return("unknown"); |
185 |
} |
186 |
|
187 |
|
188 |
void |
189 |
rtrace(fname) /* trace rays from file */ |
190 |
char *fname; |
191 |
{ |
192 |
long vcount = hresolu>1 ? hresolu*vresolu : vresolu; |
193 |
long nextflush = hresolu; |
194 |
FILE *fp; |
195 |
double d; |
196 |
FVECT orig, direc; |
197 |
/* set up input */ |
198 |
if (fname == NULL) |
199 |
fp = stdin; |
200 |
else if ((fp = fopen(fname, "r")) == NULL) { |
201 |
sprintf(errmsg, "cannot open input file \"%s\"", fname); |
202 |
error(SYSTEM, errmsg); |
203 |
} |
204 |
#ifdef MSDOS |
205 |
if (inform != 'a') |
206 |
setmode(fileno(fp), O_BINARY); |
207 |
#endif |
208 |
/* set up output */ |
209 |
setoutput(outvals); |
210 |
switch (outform) { |
211 |
case 'a': putreal = puta; break; |
212 |
case 'f': putreal = putf; break; |
213 |
case 'd': putreal = putd; break; |
214 |
case 'c': |
215 |
if (strcmp(outvals, "v")) |
216 |
error(USER, "color format with value output only"); |
217 |
break; |
218 |
default: |
219 |
error(CONSISTENCY, "botched output format"); |
220 |
} |
221 |
if (hresolu > 0) { |
222 |
if (vresolu > 0) |
223 |
fprtresolu(hresolu, vresolu, stdout); |
224 |
fflush(stdout); |
225 |
} |
226 |
/* process file */ |
227 |
while (getvec(orig, inform, fp) == 0 && |
228 |
getvec(direc, inform, fp) == 0) { |
229 |
|
230 |
d = normalize(direc); |
231 |
if (d == 0.0) { /* zero ==> flush */ |
232 |
bogusray(); |
233 |
if (--nextflush <= 0 || vcount <= 0) { |
234 |
fflush(stdout); |
235 |
nextflush = hresolu; |
236 |
} |
237 |
} else { |
238 |
samplendx++; |
239 |
/* compute and print */ |
240 |
if (imm_irrad) |
241 |
irrad(orig, direc); |
242 |
else |
243 |
rad(orig, direc, lim_dist ? d : 0.0); |
244 |
/* flush if time */ |
245 |
if (--nextflush == 0) { |
246 |
fflush(stdout); |
247 |
nextflush = hresolu; |
248 |
} |
249 |
} |
250 |
if (ferror(stdout)) |
251 |
error(SYSTEM, "write error"); |
252 |
if (--vcount == 0) /* check for end */ |
253 |
break; |
254 |
} |
255 |
fflush(stdout); |
256 |
if (vcount > 0) |
257 |
error(USER, "read error"); |
258 |
if (fname != NULL) |
259 |
fclose(fp); |
260 |
} |
261 |
|
262 |
|
263 |
setoutput(vs) /* set up output tables */ |
264 |
register char *vs; |
265 |
{ |
266 |
extern void (*trace)(); |
267 |
register void (**table)() = ray_out; |
268 |
|
269 |
castonly = 1; |
270 |
while (*vs) |
271 |
switch (*vs++) { |
272 |
case 't': /* trace */ |
273 |
*table = NULL; |
274 |
table = every_out; |
275 |
trace = ourtrace; |
276 |
castonly = 0; |
277 |
break; |
278 |
case 'o': /* origin */ |
279 |
*table++ = oputo; |
280 |
break; |
281 |
case 'd': /* direction */ |
282 |
*table++ = oputd; |
283 |
break; |
284 |
case 'v': /* value */ |
285 |
*table++ = oputv; |
286 |
castonly = 0; |
287 |
break; |
288 |
case 'l': /* effective distance */ |
289 |
*table++ = oputl; |
290 |
castonly = 0; |
291 |
break; |
292 |
case 'L': /* single ray length */ |
293 |
*table++ = oputL; |
294 |
break; |
295 |
case 'p': /* point */ |
296 |
*table++ = oputp; |
297 |
break; |
298 |
case 'n': /* perturbed normal */ |
299 |
*table++ = oputn; |
300 |
castonly = 0; |
301 |
break; |
302 |
case 'N': /* unperturbed normal */ |
303 |
*table++ = oputN; |
304 |
break; |
305 |
case 's': /* surface */ |
306 |
*table++ = oputs; |
307 |
break; |
308 |
case 'w': /* weight */ |
309 |
*table++ = oputw; |
310 |
break; |
311 |
case 'm': /* modifier */ |
312 |
*table++ = oputm; |
313 |
break; |
314 |
} |
315 |
*table = NULL; |
316 |
} |
317 |
|
318 |
|
319 |
void |
320 |
bogusray() /* print out empty record */ |
321 |
{ |
322 |
thisray.rorg[0] = thisray.rorg[1] = thisray.rorg[2] = |
323 |
thisray.rdir[0] = thisray.rdir[1] = thisray.rdir[2] = 0.0; |
324 |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
325 |
printvals(&thisray); |
326 |
} |
327 |
|
328 |
|
329 |
void |
330 |
rad(org, dir, dmax) /* compute and print ray value(s) */ |
331 |
FVECT org, dir; |
332 |
double dmax; |
333 |
{ |
334 |
VCOPY(thisray.rorg, org); |
335 |
VCOPY(thisray.rdir, dir); |
336 |
thisray.rmax = dmax; |
337 |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
338 |
if (castonly) { |
339 |
if (!localhit(&thisray, &thescene)) |
340 |
if (thisray.ro == &Aftplane) { /* clipped */ |
341 |
thisray.ro = NULL; |
342 |
thisray.rot = FHUGE; |
343 |
} else |
344 |
sourcehit(&thisray); |
345 |
} else |
346 |
rayvalue(&thisray); |
347 |
printvals(&thisray); |
348 |
} |
349 |
|
350 |
|
351 |
void |
352 |
irrad(org, dir) /* compute immediate irradiance value */ |
353 |
FVECT org, dir; |
354 |
{ |
355 |
register int i; |
356 |
|
357 |
for (i = 0; i < 3; i++) { |
358 |
thisray.rorg[i] = org[i] + dir[i]; |
359 |
thisray.rdir[i] = -dir[i]; |
360 |
} |
361 |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
362 |
/* pretend we hit surface */ |
363 |
thisray.rot = 1.0-1e-4; |
364 |
thisray.rod = 1.0; |
365 |
VCOPY(thisray.ron, dir); |
366 |
for (i = 0; i < 3; i++) /* fudge factor */ |
367 |
thisray.rop[i] = org[i] + 1e-4*dir[i]; |
368 |
/* compute and print */ |
369 |
(*ofun[Lamb.otype].funp)(&Lamb, &thisray); |
370 |
printvals(&thisray); |
371 |
} |
372 |
|
373 |
|
374 |
void |
375 |
printvals(r) /* print requested ray values */ |
376 |
RAY *r; |
377 |
{ |
378 |
register void (**tp)(); |
379 |
|
380 |
if (ray_out[0] == NULL) |
381 |
return; |
382 |
for (tp = ray_out; *tp != NULL; tp++) |
383 |
(**tp)(r); |
384 |
if (outform == 'a') |
385 |
putchar('\n'); |
386 |
} |
387 |
|
388 |
|
389 |
int |
390 |
getvec(vec, fmt, fp) /* get a vector from fp */ |
391 |
register FVECT vec; |
392 |
int fmt; |
393 |
FILE *fp; |
394 |
{ |
395 |
static float vf[3]; |
396 |
static double vd[3]; |
397 |
char buf[32]; |
398 |
register int i; |
399 |
|
400 |
switch (fmt) { |
401 |
case 'a': /* ascii */ |
402 |
for (i = 0; i < 3; i++) { |
403 |
if (fgetword(buf, sizeof(buf), fp) == NULL || |
404 |
!isflt(buf)) |
405 |
return(-1); |
406 |
vec[i] = atof(buf); |
407 |
} |
408 |
break; |
409 |
case 'f': /* binary float */ |
410 |
if (fread((char *)vf, sizeof(float), 3, fp) != 3) |
411 |
return(-1); |
412 |
vec[0] = vf[0]; vec[1] = vf[1]; vec[2] = vf[2]; |
413 |
break; |
414 |
case 'd': /* binary double */ |
415 |
if (fread((char *)vd, sizeof(double), 3, fp) != 3) |
416 |
return(-1); |
417 |
vec[0] = vd[0]; vec[1] = vd[1]; vec[2] = vd[2]; |
418 |
break; |
419 |
default: |
420 |
error(CONSISTENCY, "botched input format"); |
421 |
} |
422 |
return(0); |
423 |
} |
424 |
|
425 |
|
426 |
void |
427 |
tranotify(obj) /* record new modifier */ |
428 |
OBJECT obj; |
429 |
{ |
430 |
static int hitlimit = 0; |
431 |
register OBJREC *o = objptr(obj); |
432 |
register char **tralp; |
433 |
|
434 |
if (obj == OVOID) { /* starting over */ |
435 |
traset[0] = 0; |
436 |
hitlimit = 0; |
437 |
return; |
438 |
} |
439 |
if (hitlimit || !ismodifier(o->otype)) |
440 |
return; |
441 |
for (tralp = tralist; *tralp != NULL; tralp++) |
442 |
if (!strcmp(o->oname, *tralp)) { |
443 |
if (traset[0] >= MAXTSET) { |
444 |
error(WARNING, "too many modifiers in trace list"); |
445 |
hitlimit++; |
446 |
return; /* should this be fatal? */ |
447 |
} |
448 |
insertelem(traset, obj); |
449 |
return; |
450 |
} |
451 |
} |
452 |
|
453 |
|
454 |
static void |
455 |
ourtrace(r) /* print ray values */ |
456 |
RAY *r; |
457 |
{ |
458 |
register void (**tp)(); |
459 |
|
460 |
if (every_out[0] == NULL) |
461 |
return; |
462 |
if (r->ro == NULL) { |
463 |
if (traincl == 1) |
464 |
return; |
465 |
} else if (traincl != -1 && traincl != inset(traset, r->ro->omod)) |
466 |
return; |
467 |
tabin(r); |
468 |
for (tp = every_out; *tp != NULL; tp++) |
469 |
(**tp)(r); |
470 |
putchar('\n'); |
471 |
} |
472 |
|
473 |
|
474 |
static void |
475 |
tabin(r) /* tab in appropriate amount */ |
476 |
RAY *r; |
477 |
{ |
478 |
register RAY *rp; |
479 |
|
480 |
for (rp = r->parent; rp != NULL; rp = rp->parent) |
481 |
putchar('\t'); |
482 |
} |
483 |
|
484 |
|
485 |
static void |
486 |
oputo(r) /* print origin */ |
487 |
register RAY *r; |
488 |
{ |
489 |
(*putreal)(r->rorg[0]); |
490 |
(*putreal)(r->rorg[1]); |
491 |
(*putreal)(r->rorg[2]); |
492 |
} |
493 |
|
494 |
|
495 |
static void |
496 |
oputd(r) /* print direction */ |
497 |
register RAY *r; |
498 |
{ |
499 |
(*putreal)(r->rdir[0]); |
500 |
(*putreal)(r->rdir[1]); |
501 |
(*putreal)(r->rdir[2]); |
502 |
} |
503 |
|
504 |
|
505 |
static void |
506 |
oputv(r) /* print value */ |
507 |
register RAY *r; |
508 |
{ |
509 |
COLR cout; |
510 |
|
511 |
if (outform == 'c') { |
512 |
setcolr(cout, colval(r->rcol,RED), |
513 |
colval(r->rcol,GRN), |
514 |
colval(r->rcol,BLU)); |
515 |
fwrite((char *)cout, sizeof(cout), 1, stdout); |
516 |
return; |
517 |
} |
518 |
(*putreal)(colval(r->rcol,RED)); |
519 |
(*putreal)(colval(r->rcol,GRN)); |
520 |
(*putreal)(colval(r->rcol,BLU)); |
521 |
} |
522 |
|
523 |
|
524 |
static void |
525 |
oputl(r) /* print effective distance */ |
526 |
register RAY *r; |
527 |
{ |
528 |
(*putreal)(r->rt); |
529 |
} |
530 |
|
531 |
|
532 |
static void |
533 |
oputL(r) /* print single ray length */ |
534 |
register RAY *r; |
535 |
{ |
536 |
(*putreal)(r->rot); |
537 |
} |
538 |
|
539 |
|
540 |
static void |
541 |
oputp(r) /* print point */ |
542 |
register RAY *r; |
543 |
{ |
544 |
if (r->rot < FHUGE) { |
545 |
(*putreal)(r->rop[0]); |
546 |
(*putreal)(r->rop[1]); |
547 |
(*putreal)(r->rop[2]); |
548 |
} else { |
549 |
(*putreal)(0.0); |
550 |
(*putreal)(0.0); |
551 |
(*putreal)(0.0); |
552 |
} |
553 |
} |
554 |
|
555 |
|
556 |
static void |
557 |
oputN(r) /* print unperturbed normal */ |
558 |
register RAY *r; |
559 |
{ |
560 |
if (r->rot < FHUGE) { |
561 |
(*putreal)(r->ron[0]); |
562 |
(*putreal)(r->ron[1]); |
563 |
(*putreal)(r->ron[2]); |
564 |
} else { |
565 |
(*putreal)(0.0); |
566 |
(*putreal)(0.0); |
567 |
(*putreal)(0.0); |
568 |
} |
569 |
} |
570 |
|
571 |
|
572 |
static void |
573 |
oputn(r) /* print perturbed normal */ |
574 |
RAY *r; |
575 |
{ |
576 |
FVECT pnorm; |
577 |
|
578 |
if (r->rot >= FHUGE) { |
579 |
(*putreal)(0.0); |
580 |
(*putreal)(0.0); |
581 |
(*putreal)(0.0); |
582 |
return; |
583 |
} |
584 |
raynormal(pnorm, r); |
585 |
(*putreal)(pnorm[0]); |
586 |
(*putreal)(pnorm[1]); |
587 |
(*putreal)(pnorm[2]); |
588 |
} |
589 |
|
590 |
|
591 |
static void |
592 |
oputs(r) /* print name */ |
593 |
register RAY *r; |
594 |
{ |
595 |
if (r->ro != NULL) |
596 |
fputs(r->ro->oname, stdout); |
597 |
else |
598 |
putchar('*'); |
599 |
putchar('\t'); |
600 |
} |
601 |
|
602 |
|
603 |
static void |
604 |
oputw(r) /* print weight */ |
605 |
register RAY *r; |
606 |
{ |
607 |
(*putreal)(r->rweight); |
608 |
} |
609 |
|
610 |
|
611 |
static void |
612 |
oputm(r) /* print modifier */ |
613 |
register RAY *r; |
614 |
{ |
615 |
if (r->ro != NULL) |
616 |
if (r->ro->omod != OVOID) |
617 |
fputs(objptr(r->ro->omod)->oname, stdout); |
618 |
else |
619 |
fputs(VOIDID, stdout); |
620 |
else |
621 |
putchar('*'); |
622 |
putchar('\t'); |
623 |
} |
624 |
|
625 |
|
626 |
static void |
627 |
puta(v) /* print ascii value */ |
628 |
double v; |
629 |
{ |
630 |
printf("%e\t", v); |
631 |
} |
632 |
|
633 |
|
634 |
static void |
635 |
putd(v) /* print binary double */ |
636 |
double v; |
637 |
{ |
638 |
fwrite((char *)&v, sizeof(v), 1, stdout); |
639 |
} |
640 |
|
641 |
|
642 |
static void |
643 |
putf(v) /* print binary float */ |
644 |
double v; |
645 |
{ |
646 |
float f = v; |
647 |
|
648 |
fwrite((char *)&f, sizeof(f), 1, stdout); |
649 |
} |