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/* Copyright (c) 1995 Regents of the University of California */ |
| 2 |
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|
| 1 |
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#ifndef lint |
| 2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
| 2 |
> |
static const char RCSid[] = "$Id"; |
| 3 |
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#endif |
| 6 |
– |
|
| 4 |
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/* |
| 5 |
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* rpict.c - routines and variables for picture generation. |
| 9 |
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* |
| 10 |
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* 8/14/85 |
| 6 |
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*/ |
| 7 |
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|
| 8 |
+ |
#include "copyright.h" |
| 9 |
+ |
|
| 10 |
+ |
#include "platform.h" |
| 11 |
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#include "ray.h" |
| 12 |
+ |
#include "paths.h" |
| 13 |
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|
| 14 |
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#include <sys/types.h> |
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|
| 16 |
< |
#ifndef NIX |
| 16 |
> |
#ifndef NON_POSIX |
| 17 |
|
#ifdef BSD |
| 18 |
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#include <sys/time.h> |
| 19 |
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#include <sys/resource.h> |
| 23 |
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#endif |
| 24 |
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#endif |
| 25 |
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|
| 26 |
< |
extern time_t time(); |
| 28 |
< |
|
| 26 |
> |
#include <time.h> |
| 27 |
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#include <signal.h> |
| 28 |
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|
| 29 |
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#include "view.h" |
| 32 |
– |
|
| 33 |
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#include "resolu.h" |
| 34 |
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|
| 30 |
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#include "random.h" |
| 36 |
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|
| 31 |
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#include "paths.h" |
| 32 |
+ |
#include "rtmisc.h" /* myhostname() */ |
| 33 |
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|
| 34 |
+ |
|
| 35 |
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#define RFTEMPLATE "rfXXXXXX" |
| 36 |
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|
| 37 |
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#ifndef SIGCONT |
| 38 |
+ |
#ifdef SIGIO /* XXX can we live without this? */ |
| 39 |
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#define SIGCONT SIGIO |
| 40 |
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#endif |
| 41 |
+ |
#endif |
| 42 |
|
|
| 43 |
+ |
CUBE thescene; /* our scene */ |
| 44 |
+ |
OBJECT nsceneobjs; /* number of objects in our scene */ |
| 45 |
+ |
|
| 46 |
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int dimlist[MAXDIM]; /* sampling dimensions */ |
| 47 |
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int ndims = 0; /* number of sampling dimensions */ |
| 48 |
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int samplendx; /* sample index number */ |
| 49 |
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|
| 50 |
+ |
extern void ambnotify(); |
| 51 |
+ |
void (*addobjnotify[])() = {ambnotify, NULL}; |
| 52 |
+ |
|
| 53 |
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VIEW ourview = STDVIEW; /* view parameters */ |
| 54 |
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int hresolu = 512; /* horizontal resolution */ |
| 55 |
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int vresolu = 512; /* vertical resolution */ |
| 59 |
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double maxdiff = .05; /* max. difference for interpolation */ |
| 60 |
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double dstrpix = 0.67; /* square pixel distribution */ |
| 61 |
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|
| 62 |
+ |
double mblur = 0.; /* motion blur parameter */ |
| 63 |
+ |
|
| 64 |
+ |
void (*trace)() = NULL; /* trace call */ |
| 65 |
+ |
|
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+ |
int do_irrad = 0; /* compute irradiance? */ |
| 67 |
+ |
|
| 68 |
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double dstrsrc = 0.0; /* square source distribution */ |
| 69 |
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double shadthresh = .05; /* shadow threshold */ |
| 70 |
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double shadcert = .5; /* shadow certainty */ |
| 74 |
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double srcsizerat = .25; /* maximum ratio source size/dist. */ |
| 75 |
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|
| 76 |
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COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
| 77 |
< |
double salbedo = 0.; /* global scattering albedo */ |
| 77 |
> |
COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
| 78 |
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double seccg = 0.; /* global scattering eccentricity */ |
| 79 |
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double ssampdist = 0.; /* scatter sampling distance */ |
| 80 |
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|
| 83 |
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|
| 84 |
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int backvis = 1; /* back face visibility */ |
| 85 |
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|
| 86 |
< |
int maxdepth = 6; /* maximum recursion depth */ |
| 87 |
< |
double minweight = 5e-3; /* minimum ray weight */ |
| 86 |
> |
int maxdepth = 7; /* maximum recursion depth */ |
| 87 |
> |
double minweight = 4e-3; /* minimum ray weight */ |
| 88 |
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|
| 89 |
+ |
char *ambfile = NULL; /* ambient file name */ |
| 90 |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
| 91 |
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int ambvwt = 0; /* initial weight for ambient value */ |
| 92 |
< |
double ambacc = 0.2; /* ambient accuracy */ |
| 93 |
< |
int ambres = 32; /* ambient resolution */ |
| 94 |
< |
int ambdiv = 128; /* ambient divisions */ |
| 95 |
< |
int ambssamp = 0; /* ambient super-samples */ |
| 92 |
> |
double ambacc = 0.15; /* ambient accuracy */ |
| 93 |
> |
int ambres = 64; /* ambient resolution */ |
| 94 |
> |
int ambdiv = 512; /* ambient divisions */ |
| 95 |
> |
int ambssamp = 128; /* ambient super-samples */ |
| 96 |
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int ambounce = 0; /* ambient bounces */ |
| 97 |
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char *amblist[128]; /* ambient include/exclude list */ |
| 98 |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
| 99 |
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|
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#ifdef MSDOS |
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int ralrm = 60; /* seconds between reports */ |
| 91 |
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#else |
| 100 |
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int ralrm = 0; /* seconds between reports */ |
| 93 |
– |
#endif |
| 101 |
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|
| 102 |
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double pctdone = 0.0; /* percentage done */ |
| 96 |
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|
| 103 |
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time_t tlastrept = 0L; /* time at last report */ |
| 104 |
+ |
time_t tstart; /* starting time */ |
| 105 |
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|
| 99 |
– |
extern time_t tstart; /* starting time */ |
| 100 |
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|
| 101 |
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extern unsigned long nrays; /* number of rays traced */ |
| 102 |
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|
| 106 |
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#define MAXDIV 16 /* maximum sample size */ |
| 107 |
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|
| 108 |
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#define pixjitter() (.5+dstrpix*(.5-frandom())) |
| 109 |
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|
| 110 |
< |
static int hres, vres; /* resolution for this frame */ |
| 110 |
> |
int hres, vres; /* resolution for this frame */ |
| 111 |
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|
| 112 |
< |
extern char *mktemp(); |
| 112 |
> |
static VIEW lastview; /* the previous view input */ |
| 113 |
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|
| 114 |
+ |
extern char *mktemp(); /* XXX should be in stdlib.h or unistd.h */ |
| 115 |
+ |
|
| 116 |
+ |
void report(); |
| 117 |
+ |
|
| 118 |
|
double pixvalue(); |
| 119 |
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|
| 120 |
< |
#ifdef NIX |
| 114 |
< |
#define file_exists(f) (access(f,F_OK)==0) |
| 115 |
< |
#else |
| 120 |
> |
#ifdef RHAS_STAT |
| 121 |
|
#include <sys/types.h> |
| 122 |
|
#include <sys/stat.h> |
| 123 |
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int |
| 128 |
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if (stat(fname, &sbuf) < 0) return(0); |
| 129 |
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return((sbuf.st_mode & S_IFREG) != 0); |
| 130 |
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} |
| 131 |
+ |
#else |
| 132 |
+ |
#define file_exists(f) (access(f,F_OK)==0) |
| 133 |
|
#endif |
| 134 |
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|
| 135 |
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|
| 136 |
+ |
void |
| 137 |
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quit(code) /* quit program */ |
| 138 |
|
int code; |
| 139 |
|
{ |
| 140 |
|
if (code) /* report status */ |
| 141 |
|
report(); |
| 142 |
+ |
#ifndef NON_POSIX |
| 143 |
|
headclean(); /* delete header file */ |
| 144 |
|
pfclean(); /* clean up persist files */ |
| 145 |
+ |
#endif |
| 146 |
|
exit(code); |
| 147 |
|
} |
| 148 |
|
|
| 149 |
|
|
| 150 |
< |
#ifndef NIX |
| 150 |
> |
#ifndef NON_POSIX |
| 151 |
> |
void |
| 152 |
|
report() /* report progress */ |
| 153 |
|
{ |
| 143 |
– |
extern char *myhostname(); |
| 154 |
|
double u, s; |
| 155 |
|
#ifdef BSD |
| 156 |
|
struct rusage rubuf; |
| 183 |
|
nrays, pctdone, u/3600., s/3600., |
| 184 |
|
(tlastrept-tstart)/3600., myhostname()); |
| 185 |
|
eputs(errmsg); |
| 186 |
< |
#ifndef BSD |
| 186 |
> |
#ifdef SIGCONT |
| 187 |
|
signal(SIGCONT, report); |
| 188 |
|
#endif |
| 189 |
|
} |
| 190 |
|
#else |
| 191 |
+ |
void |
| 192 |
|
report() /* report progress */ |
| 193 |
|
{ |
| 194 |
|
tlastrept = time((time_t *)NULL); |
| 199 |
|
#endif |
| 200 |
|
|
| 201 |
|
|
| 202 |
+ |
void |
| 203 |
|
rpict(seq, pout, zout, prvr) /* generate image(s) */ |
| 204 |
|
int seq; |
| 205 |
|
char *pout, *zout, *prvr; |
| 215 |
|
* sequenced file naming. |
| 216 |
|
*/ |
| 217 |
|
{ |
| 206 |
– |
extern char *rindex(), *strncpy(), *strcat(), *strcpy(); |
| 218 |
|
char fbuf[128], fbuf2[128]; |
| 219 |
|
int npicts; |
| 220 |
|
register char *cp; |
| 241 |
|
for ( ; seq < rn; seq++) |
| 242 |
|
if (nextview(stdin) == EOF) |
| 243 |
|
error(USER, "unexpected EOF on view input"); |
| 244 |
+ |
setview(&ourview); |
| 245 |
|
prvr = fbuf; /* mark for renaming */ |
| 246 |
|
} |
| 247 |
< |
if (pout != NULL & prvr != NULL) { |
| 247 |
> |
if ((pout != NULL) & (prvr != NULL)) { |
| 248 |
|
sprintf(fbuf, pout, seq); |
| 249 |
|
if (!strcmp(prvr, fbuf)) { /* rename */ |
| 250 |
|
strcpy(fbuf2, fbuf); |
| 254 |
|
cp--; |
| 255 |
|
strcpy(cp, RFTEMPLATE); |
| 256 |
|
prvr = mktemp(fbuf2); |
| 257 |
< |
if (rename(fbuf, prvr) < 0) |
| 257 |
> |
if (rename(fbuf, prvr) < 0) { |
| 258 |
|
if (errno == ENOENT) { /* ghost file */ |
| 259 |
|
sprintf(errmsg, |
| 260 |
|
"new output file \"%s\"", |
| 267 |
|
fbuf, prvr); |
| 268 |
|
error(SYSTEM, errmsg); |
| 269 |
|
} |
| 270 |
+ |
} |
| 271 |
|
} |
| 272 |
|
} |
| 273 |
|
npicts = 0; /* render sequence */ |
| 284 |
|
fbuf); |
| 285 |
|
error(USER, errmsg); |
| 286 |
|
} |
| 287 |
+ |
setview(&ourview); |
| 288 |
|
continue; /* don't clobber */ |
| 289 |
|
} |
| 290 |
|
if (freopen(fbuf, "w", stdout) == NULL) { |
| 292 |
|
"cannot open output file \"%s\"", fbuf); |
| 293 |
|
error(SYSTEM, errmsg); |
| 294 |
|
} |
| 295 |
< |
#ifdef MSDOS |
| 282 |
< |
setmode(fileno(stdout), O_BINARY); |
| 283 |
< |
#endif |
| 295 |
> |
SET_FILE_BINARY(stdout); |
| 296 |
|
dupheader(); |
| 297 |
|
} |
| 298 |
|
hres = hresolu; vres = vresolu; pa = pixaspect; |
| 299 |
< |
if (prvr != NULL) |
| 300 |
< |
if (viewfile(prvr, &ourview, &rs) <= 0 |
| 289 |
< |
|| rs.or != PIXSTANDARD) { |
| 299 |
> |
if (prvr != NULL) { |
| 300 |
> |
if (viewfile(prvr, &ourview, &rs) <= 0) { |
| 301 |
|
sprintf(errmsg, |
| 302 |
|
"cannot recover view parameters from \"%s\"", prvr); |
| 303 |
|
error(WARNING, errmsg); |
| 306 |
|
hres = scanlen(&rs); |
| 307 |
|
vres = numscans(&rs); |
| 308 |
|
} |
| 309 |
+ |
} |
| 310 |
|
if ((cp = setview(&ourview)) != NULL) |
| 311 |
|
error(USER, cp); |
| 312 |
|
normaspect(viewaspect(&ourview), &pa, &hres, &vres); |
| 324 |
|
putchar('\n'); |
| 325 |
|
if (pa < .99 || pa > 1.01) |
| 326 |
|
fputaspect(pa, stdout); |
| 327 |
+ |
fputnow(stdout); |
| 328 |
|
fputformat(COLRFMT, stdout); |
| 329 |
|
putchar('\n'); |
| 330 |
|
if (zout != NULL) |
| 346 |
|
{ |
| 347 |
|
char linebuf[256]; |
| 348 |
|
|
| 349 |
+ |
lastview = ourview; |
| 350 |
|
while (fgets(linebuf, sizeof(linebuf), fp) != NULL) |
| 351 |
|
if (isview(linebuf) && sscanview(&ourview, linebuf) > 0) |
| 352 |
|
return(0); |
| 357 |
|
render(zfile, oldfile) /* render the scene */ |
| 358 |
|
char *zfile, *oldfile; |
| 359 |
|
{ |
| 346 |
– |
extern long lseek(); |
| 360 |
|
COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
| 361 |
|
float *zbar[MAXDIV+1]; /* z values */ |
| 362 |
|
char *sampdens; /* previous sample density */ |
| 367 |
|
COLOR *colptr; |
| 368 |
|
float *zptr; |
| 369 |
|
register int i; |
| 370 |
+ |
/* check for empty image */ |
| 371 |
+ |
if (hres <= 0 || vres <= 0) { |
| 372 |
+ |
error(WARNING, "empty output picture"); |
| 373 |
+ |
fprtresolu(0, 0, stdout); |
| 374 |
+ |
return; |
| 375 |
+ |
} |
| 376 |
|
/* allocate scanlines */ |
| 377 |
|
for (i = 0; i <= psample; i++) { |
| 378 |
|
scanbar[i] = (COLOR *)malloc(hres*sizeof(COLOR)); |
| 383 |
|
ystep = (psample*99+70)/140; |
| 384 |
|
if (hstep > 2) { |
| 385 |
|
i = hres/hstep + 2; |
| 386 |
< |
if ((sampdens = malloc(i)) == NULL) |
| 386 |
> |
if ((sampdens = (char *)malloc(i)) == NULL) |
| 387 |
|
goto memerr; |
| 388 |
|
while (i--) |
| 389 |
|
sampdens[i] = hstep; |
| 395 |
|
sprintf(errmsg, "cannot open z-file \"%s\"", zfile); |
| 396 |
|
error(SYSTEM, errmsg); |
| 397 |
|
} |
| 398 |
< |
#ifdef MSDOS |
| 380 |
< |
setmode(zfd, O_BINARY); |
| 381 |
< |
#endif |
| 398 |
> |
SET_FD_BINARY(zfd); |
| 399 |
|
for (i = 0; i <= psample; i++) { |
| 400 |
|
zbar[i] = (float *)malloc(hres*sizeof(float)); |
| 401 |
|
if (zbar[i] == NULL) |
| 413 |
|
if (i >= vres) |
| 414 |
|
goto alldone; |
| 415 |
|
if (zfd != -1 && i > 0 && |
| 416 |
< |
lseek(zfd, (long)i*hres*sizeof(float), 0) == -1) |
| 416 |
> |
lseek(zfd, (off_t)i*hres*sizeof(float), SEEK_SET) < 0) |
| 417 |
|
error(SYSTEM, "z-file seek error in render"); |
| 418 |
|
pctdone = 100.0*i/vres; |
| 419 |
|
if (ralrm > 0) /* report init stats */ |
| 420 |
|
report(); |
| 421 |
< |
#ifndef BSD |
| 421 |
> |
#ifdef SIGCONT |
| 422 |
|
else |
| 406 |
– |
#endif |
| 423 |
|
signal(SIGCONT, report); |
| 424 |
< |
ypos = vres-1 - i; |
| 424 |
> |
#endif |
| 425 |
> |
ypos = vres-1 - i; /* initialize sampling */ |
| 426 |
> |
if (directvis) |
| 427 |
> |
init_drawsources(psample); |
| 428 |
|
fillscanline(scanbar[0], zbar[0], sampdens, hres, ypos, hstep); |
| 429 |
|
/* compute scanlines */ |
| 430 |
|
for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
| 444 |
|
hres, ypos, hstep); |
| 445 |
|
/* fill bar */ |
| 446 |
|
fillscanbar(scanbar, zbar, hres, ypos, ystep); |
| 447 |
+ |
if (directvis) /* add bitty sources */ |
| 448 |
+ |
drawsources(scanbar, zbar, 0, hres, ypos, ystep); |
| 449 |
|
/* write it out */ |
| 450 |
< |
#ifndef BSD |
| 450 |
> |
#ifdef SIGCONT |
| 451 |
|
signal(SIGCONT, SIG_IGN); /* don't interrupt writes */ |
| 452 |
|
#endif |
| 453 |
|
for (i = ystep; i > 0; i--) { |
| 464 |
|
pctdone = 100.0*(vres-1-ypos)/vres; |
| 465 |
|
if (ralrm > 0 && time((time_t *)NULL) >= tlastrept+ralrm) |
| 466 |
|
report(); |
| 467 |
< |
#ifndef BSD |
| 467 |
> |
#ifdef SIGCONT |
| 468 |
|
else |
| 469 |
|
signal(SIGCONT, report); |
| 470 |
|
#endif |
| 471 |
|
} |
| 472 |
|
/* clean up */ |
| 473 |
+ |
#ifdef SIGCONT |
| 474 |
|
signal(SIGCONT, SIG_IGN); |
| 475 |
+ |
#endif |
| 476 |
|
if (zfd != -1 && write(zfd, (char *)zbar[0], hres*sizeof(float)) |
| 477 |
|
< hres*sizeof(float)) |
| 478 |
|
goto writerr; |
| 484 |
|
if (close(zfd) == -1) |
| 485 |
|
goto writerr; |
| 486 |
|
for (i = 0; i <= psample; i++) |
| 487 |
< |
free((char *)zbar[i]); |
| 487 |
> |
free((void *)zbar[i]); |
| 488 |
|
} |
| 489 |
|
for (i = 0; i <= psample; i++) |
| 490 |
< |
free((char *)scanbar[i]); |
| 490 |
> |
free((void *)scanbar[i]); |
| 491 |
|
if (sampdens != NULL) |
| 492 |
|
free(sampdens); |
| 493 |
|
pctdone = 100.0; |
| 494 |
|
if (ralrm > 0) |
| 495 |
|
report(); |
| 496 |
+ |
#ifdef SIGCONT |
| 497 |
|
signal(SIGCONT, SIG_DFL); |
| 498 |
+ |
#endif |
| 499 |
|
return; |
| 500 |
|
writerr: |
| 501 |
|
error(SYSTEM, "write error in render"); |
| 514 |
|
int bl = xstep, b = xstep; |
| 515 |
|
double z; |
| 516 |
|
register int i; |
| 517 |
< |
|
| 517 |
> |
|
| 518 |
|
z = pixvalue(scanline[0], 0, y); |
| 519 |
|
if (zline) zline[0] = z; |
| 520 |
|
/* zig-zag start for quincunx pattern */ |
| 548 |
|
float zline[MAXDIV+1]; |
| 549 |
|
int b = ysize; |
| 550 |
|
register int i, j; |
| 551 |
< |
|
| 551 |
> |
|
| 552 |
|
for (i = 0; i < xres; i++) { |
| 528 |
– |
|
| 553 |
|
copycolor(vline[0], scanbar[0][i]); |
| 554 |
|
copycolor(vline[ysize], scanbar[ysize][i]); |
| 555 |
|
if (zbar[0]) { |
| 556 |
|
zline[0] = zbar[0][i]; |
| 557 |
|
zline[ysize] = zbar[ysize][i]; |
| 558 |
|
} |
| 535 |
– |
|
| 559 |
|
b = fillsample(vline, zbar[0] ? zline : (float *)NULL, |
| 560 |
|
i, y, 0, ysize, b/2); |
| 561 |
< |
|
| 561 |
> |
|
| 562 |
|
for (j = 1; j < ysize; j++) |
| 563 |
|
copycolor(scanbar[j][i], vline[j]); |
| 564 |
|
if (zbar[0]) |
| 581 |
|
COLOR ctmp; |
| 582 |
|
int ncut; |
| 583 |
|
register int len; |
| 584 |
< |
|
| 584 |
> |
|
| 585 |
|
if (xlen > 0) /* x or y length is zero */ |
| 586 |
|
len = xlen; |
| 587 |
|
else |
| 588 |
|
len = ylen; |
| 589 |
< |
|
| 589 |
> |
|
| 590 |
|
if (len <= 1) /* limit recursion */ |
| 591 |
|
return(0); |
| 592 |
< |
|
| 593 |
< |
if (b > 0 |
| 594 |
< |
|| (zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
| 592 |
> |
|
| 593 |
> |
if (b > 0 || |
| 594 |
> |
(zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
| 595 |
|
|| bigdiff(colline[0], colline[len], maxdiff)) { |
| 596 |
< |
|
| 596 |
> |
|
| 597 |
|
z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
| 598 |
|
if (zline) zline[len>>1] = z; |
| 599 |
|
ncut = 1; |
| 577 |
– |
|
| 600 |
|
} else { /* interpolate */ |
| 579 |
– |
|
| 601 |
|
copycolor(colline[len>>1], colline[len]); |
| 602 |
|
ratio = (double)(len>>1) / len; |
| 603 |
|
scalecolor(colline[len>>1], ratio); |
| 611 |
|
} |
| 612 |
|
/* recurse */ |
| 613 |
|
ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
| 614 |
< |
|
| 614 |
> |
|
| 615 |
|
ncut += fillsample(colline+(len>>1), |
| 616 |
|
zline ? zline+(len>>1) : (float *)NULL, |
| 617 |
|
x+(xlen>>1), y+(ylen>>1), |
| 626 |
|
COLOR col; /* returned color */ |
| 627 |
|
int x, y; /* pixel position */ |
| 628 |
|
{ |
| 629 |
< |
static RAY thisray; |
| 630 |
< |
|
| 631 |
< |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview, |
| 632 |
< |
(x+pixjitter())/hres, (y+pixjitter())/vres)) < -FTINY) { |
| 629 |
> |
RAY thisray; |
| 630 |
> |
FVECT lorg, ldir; |
| 631 |
> |
double hpos, vpos, lmax, d; |
| 632 |
> |
/* compute view ray */ |
| 633 |
> |
hpos = (x+pixjitter())/hres; |
| 634 |
> |
vpos = (y+pixjitter())/vres; |
| 635 |
> |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
| 636 |
> |
&ourview, hpos, vpos)) < -FTINY) { |
| 637 |
|
setcolor(col, 0.0, 0.0, 0.0); |
| 638 |
|
return(0.0); |
| 639 |
|
} |
| 640 |
|
|
| 616 |
– |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 617 |
– |
|
| 641 |
|
samplendx = pixnumber(x,y,hres,vres); /* set pixel index */ |
| 642 |
|
|
| 643 |
+ |
/* optional motion blur */ |
| 644 |
+ |
if (lastview.type && mblur > FTINY && (lmax = viewray(lorg, ldir, |
| 645 |
+ |
&lastview, hpos, vpos)) >= -FTINY) { |
| 646 |
+ |
register int i; |
| 647 |
+ |
register double d = mblur*(.5-urand(281+samplendx)); |
| 648 |
+ |
|
| 649 |
+ |
thisray.rmax = (1.-d)*thisray.rmax + d*lmax; |
| 650 |
+ |
for (i = 3; i--; ) { |
| 651 |
+ |
thisray.rorg[i] = (1.-d)*thisray.rorg[i] + d*lorg[i]; |
| 652 |
+ |
thisray.rdir[i] = (1.-d)*thisray.rdir[i] + d*ldir[i]; |
| 653 |
+ |
} |
| 654 |
+ |
if (normalize(thisray.rdir) == 0.0) |
| 655 |
+ |
return(0.0); |
| 656 |
+ |
} |
| 657 |
+ |
|
| 658 |
+ |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 659 |
+ |
|
| 660 |
|
rayvalue(&thisray); /* trace ray */ |
| 661 |
|
|
| 662 |
|
copycolor(col, thisray.rcol); /* return color */ |
| 663 |
< |
|
| 663 |
> |
|
| 664 |
|
return(thisray.rt); /* return distance */ |
| 665 |
|
} |
| 666 |
|
|
| 681 |
|
error(WARNING, errmsg); |
| 682 |
|
goto gotzip; |
| 683 |
|
} |
| 684 |
< |
#ifdef MSDOS |
| 645 |
< |
setmode(fileno(fp), O_BINARY); |
| 646 |
< |
#endif |
| 684 |
> |
SET_FILE_BINARY(fp); |
| 685 |
|
/* discard header */ |
| 686 |
|
getheader(fp, NULL, NULL); |
| 687 |
|
/* get picture size */ |
| 710 |
|
} |
| 711 |
|
if (fflush(stdout) == EOF) |
| 712 |
|
goto writerr; |
| 713 |
< |
free((char *)scanline); |
| 713 |
> |
free((void *)scanline); |
| 714 |
|
fclose(fp); |
| 715 |
|
unlink(oldfile); |
| 716 |
|
return(y); |