1 |
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/* Copyright (c) 1994 Regents of the University of California */ |
2 |
– |
|
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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*/ |
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|
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#include "copyright.h" |
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|
10 |
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#include "ray.h" |
11 |
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|
12 |
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#include <sys/types.h> |
17 |
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#include <sys/resource.h> |
18 |
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#else |
19 |
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#include <sys/times.h> |
23 |
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#include <sys/utsname.h> |
20 |
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#include <unistd.h> |
21 |
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#endif |
22 |
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#endif |
27 |
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|
28 |
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#include "view.h" |
29 |
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|
34 |
– |
#include "resolu.h" |
35 |
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|
30 |
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#include "random.h" |
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|
32 |
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#include "paths.h" |
37 |
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#define SIGCONT SIGIO |
38 |
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#endif |
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|
40 |
+ |
CUBE thescene; /* our scene */ |
41 |
+ |
OBJECT nsceneobjs; /* number of objects in our scene */ |
42 |
+ |
|
43 |
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int dimlist[MAXDIM]; /* sampling dimensions */ |
44 |
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int ndims = 0; /* number of sampling dimensions */ |
45 |
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int samplendx; /* sample index number */ |
46 |
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|
47 |
+ |
extern void ambnotify(); |
48 |
+ |
void (*addobjnotify[])() = {ambnotify, NULL}; |
49 |
+ |
|
50 |
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VIEW ourview = STDVIEW; /* view parameters */ |
51 |
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int hresolu = 512; /* horizontal resolution */ |
52 |
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int vresolu = 512; /* vertical resolution */ |
56 |
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double maxdiff = .05; /* max. difference for interpolation */ |
57 |
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double dstrpix = 0.67; /* square pixel distribution */ |
58 |
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|
59 |
+ |
double mblur = 0.; /* motion blur parameter */ |
60 |
+ |
|
61 |
+ |
void (*trace)() = NULL; /* trace call */ |
62 |
+ |
|
63 |
+ |
int do_irrad = 0; /* compute irradiance? */ |
64 |
+ |
|
65 |
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double dstrsrc = 0.0; /* square source distribution */ |
66 |
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double shadthresh = .05; /* shadow threshold */ |
67 |
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double shadcert = .5; /* shadow certainty */ |
70 |
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int directvis = 1; /* sources visible? */ |
71 |
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double srcsizerat = .25; /* maximum ratio source size/dist. */ |
72 |
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|
73 |
+ |
COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
74 |
+ |
COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
75 |
+ |
double seccg = 0.; /* global scattering eccentricity */ |
76 |
+ |
double ssampdist = 0.; /* scatter sampling distance */ |
77 |
+ |
|
78 |
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double specthresh = .15; /* specular sampling threshold */ |
79 |
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double specjitter = 1.; /* specular sampling jitter */ |
80 |
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|
81 |
+ |
int backvis = 1; /* back face visibility */ |
82 |
+ |
|
83 |
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int maxdepth = 6; /* maximum recursion depth */ |
84 |
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double minweight = 5e-3; /* minimum ray weight */ |
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|
86 |
+ |
char *ambfile = NULL; /* ambient file name */ |
87 |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
88 |
+ |
int ambvwt = 0; /* initial weight for ambient value */ |
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double ambacc = 0.2; /* ambient accuracy */ |
90 |
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int ambres = 32; /* ambient resolution */ |
91 |
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int ambdiv = 128; /* ambient divisions */ |
94 |
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char *amblist[128]; /* ambient include/exclude list */ |
95 |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
96 |
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|
82 |
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#ifdef MSDOS |
83 |
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int ralrm = 60; /* seconds between reports */ |
84 |
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#else |
97 |
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int ralrm = 0; /* seconds between reports */ |
86 |
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#endif |
98 |
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|
99 |
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double pctdone = 0.0; /* percentage done */ |
89 |
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|
100 |
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time_t tlastrept = 0L; /* time at last report */ |
101 |
+ |
time_t tstart; /* starting time */ |
102 |
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|
92 |
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extern time_t tstart; /* starting time */ |
93 |
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|
94 |
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extern unsigned long nrays; /* number of rays traced */ |
95 |
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|
103 |
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#define MAXDIV 16 /* maximum sample size */ |
104 |
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|
105 |
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#define pixjitter() (.5+dstrpix*(.5-frandom())) |
106 |
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|
107 |
< |
static int hres, vres; /* resolution for this frame */ |
107 |
> |
int hres, vres; /* resolution for this frame */ |
108 |
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|
109 |
+ |
static VIEW lastview; /* the previous view input */ |
110 |
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|
111 |
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extern char *mktemp(); |
112 |
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|
113 |
+ |
void report(); |
114 |
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|
115 |
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double pixvalue(); |
116 |
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|
117 |
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#ifdef NIX |
130 |
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#endif |
131 |
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|
132 |
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|
133 |
+ |
void |
134 |
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quit(code) /* quit program */ |
135 |
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int code; |
136 |
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{ |
137 |
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if (code) /* report status */ |
138 |
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report(); |
139 |
+ |
#ifndef NIX |
140 |
|
headclean(); /* delete header file */ |
141 |
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pfclean(); /* clean up persist files */ |
142 |
+ |
#endif |
143 |
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exit(code); |
144 |
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} |
145 |
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|
146 |
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|
147 |
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#ifndef NIX |
148 |
+ |
void |
149 |
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report() /* report progress */ |
150 |
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{ |
151 |
+ |
extern char *myhostname(); |
152 |
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double u, s; |
153 |
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#ifdef BSD |
138 |
– |
char hostname[257]; |
154 |
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struct rusage rubuf; |
155 |
|
#else |
156 |
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struct tms tbuf; |
142 |
– |
struct utsname nambuf; |
157 |
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double period; |
144 |
– |
#define hostname nambuf.nodename |
158 |
|
#endif |
159 |
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|
160 |
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tlastrept = time((time_t *)NULL); |
165 |
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getrusage(RUSAGE_CHILDREN, &rubuf); |
166 |
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u += rubuf.ru_utime.tv_sec + rubuf.ru_utime.tv_usec/1e6; |
167 |
|
s += rubuf.ru_stime.tv_sec + rubuf.ru_stime.tv_usec/1e6; |
155 |
– |
gethostname(hostname, sizeof(hostname)); |
168 |
|
#else |
169 |
|
times(&tbuf); |
170 |
|
#ifdef _SC_CLK_TCK |
174 |
|
#endif |
175 |
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u = ( tbuf.tms_utime + tbuf.tms_cutime ) * period; |
176 |
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s = ( tbuf.tms_stime + tbuf.tms_cstime ) * period; |
165 |
– |
uname(&nambuf); |
177 |
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#endif |
178 |
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|
179 |
|
sprintf(errmsg, |
180 |
|
"%lu rays, %4.2f%% after %.3fu %.3fs %.3fr hours on %s\n", |
181 |
|
nrays, pctdone, u/3600., s/3600., |
182 |
< |
(tlastrept-tstart)/3600., hostname); |
182 |
> |
(tlastrept-tstart)/3600., myhostname()); |
183 |
|
eputs(errmsg); |
184 |
|
#ifndef BSD |
185 |
|
signal(SIGCONT, report); |
175 |
– |
#undef hostname |
186 |
|
#endif |
187 |
|
} |
188 |
|
#else |
189 |
+ |
void |
190 |
|
report() /* report progress */ |
191 |
|
{ |
192 |
|
tlastrept = time((time_t *)NULL); |
197 |
|
#endif |
198 |
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|
199 |
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|
200 |
+ |
void |
201 |
|
rpict(seq, pout, zout, prvr) /* generate image(s) */ |
202 |
|
int seq; |
203 |
|
char *pout, *zout, *prvr; |
213 |
|
* sequenced file naming. |
214 |
|
*/ |
215 |
|
{ |
204 |
– |
extern char *rindex(), *strncpy(), *strcat(), *strcpy(); |
216 |
|
char fbuf[128], fbuf2[128]; |
217 |
|
int npicts; |
218 |
|
register char *cp; |
239 |
|
for ( ; seq < rn; seq++) |
240 |
|
if (nextview(stdin) == EOF) |
241 |
|
error(USER, "unexpected EOF on view input"); |
242 |
+ |
setview(&ourview); |
243 |
|
prvr = fbuf; /* mark for renaming */ |
244 |
|
} |
245 |
|
if (pout != NULL & prvr != NULL) { |
281 |
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fbuf); |
282 |
|
error(USER, errmsg); |
283 |
|
} |
284 |
+ |
setview(&ourview); |
285 |
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continue; /* don't clobber */ |
286 |
|
} |
287 |
|
if (freopen(fbuf, "w", stdout) == NULL) { |
297 |
|
hres = hresolu; vres = vresolu; pa = pixaspect; |
298 |
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if (prvr != NULL) |
299 |
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if (viewfile(prvr, &ourview, &rs) <= 0 |
300 |
< |
|| rs.or != PIXSTANDARD) { |
300 |
> |
|| rs.rt != PIXSTANDARD) { |
301 |
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sprintf(errmsg, |
302 |
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"cannot recover view parameters from \"%s\"", prvr); |
303 |
|
error(WARNING, errmsg); |
344 |
|
{ |
345 |
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char linebuf[256]; |
346 |
|
|
347 |
+ |
copystruct(&lastview, &ourview); |
348 |
|
while (fgets(linebuf, sizeof(linebuf), fp) != NULL) |
349 |
|
if (isview(linebuf) && sscanview(&ourview, linebuf) > 0) |
350 |
|
return(0); |
355 |
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render(zfile, oldfile) /* render the scene */ |
356 |
|
char *zfile, *oldfile; |
357 |
|
{ |
344 |
– |
extern long lseek(); |
358 |
|
COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
359 |
|
float *zbar[MAXDIV+1]; /* z values */ |
360 |
|
char *sampdens; /* previous sample density */ |
365 |
|
COLOR *colptr; |
366 |
|
float *zptr; |
367 |
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register int i; |
368 |
+ |
/* check for empty image */ |
369 |
+ |
if (hres <= 0 || vres <= 0) { |
370 |
+ |
error(WARNING, "empty output picture"); |
371 |
+ |
fprtresolu(0, 0, stdout); |
372 |
+ |
return; |
373 |
+ |
} |
374 |
|
/* allocate scanlines */ |
375 |
|
for (i = 0; i <= psample; i++) { |
376 |
|
scanbar[i] = (COLOR *)malloc(hres*sizeof(COLOR)); |
381 |
|
ystep = (psample*99+70)/140; |
382 |
|
if (hstep > 2) { |
383 |
|
i = hres/hstep + 2; |
384 |
< |
if ((sampdens = malloc(i)) == NULL) |
384 |
> |
if ((sampdens = (char *)malloc(i)) == NULL) |
385 |
|
goto memerr; |
386 |
|
while (i--) |
387 |
|
sampdens[i] = hstep; |
410 |
|
fprtresolu(hres, vres, stdout); |
411 |
|
/* recover file and compute first */ |
412 |
|
i = salvage(oldfile); |
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), 0) < 0) |
417 |
|
error(SYSTEM, "z-file seek error in render"); |
418 |
|
pctdone = 100.0*i/vres; |
419 |
|
if (ralrm > 0) /* report init stats */ |
422 |
|
else |
423 |
|
#endif |
424 |
|
signal(SIGCONT, report); |
425 |
< |
ypos = vres-1 - i; |
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 |
451 |
|
signal(SIGCONT, SIG_IGN); /* don't interrupt writes */ |
471 |
|
} |
472 |
|
/* clean up */ |
473 |
|
signal(SIGCONT, SIG_IGN); |
474 |
< |
if (zfd != -1) { |
450 |
< |
if (write(zfd, (char *)zbar[0], hres*sizeof(float)) |
474 |
> |
if (zfd != -1 && write(zfd, (char *)zbar[0], hres*sizeof(float)) |
475 |
|
< hres*sizeof(float)) |
476 |
< |
goto writerr; |
476 |
> |
goto writerr; |
477 |
> |
fwritescan(scanbar[0], hres, stdout); |
478 |
> |
if (fflush(stdout) == EOF) |
479 |
> |
goto writerr; |
480 |
> |
alldone: |
481 |
> |
if (zfd != -1) { |
482 |
|
if (close(zfd) == -1) |
483 |
|
goto writerr; |
484 |
|
for (i = 0; i <= psample; i++) |
485 |
< |
free((char *)zbar[i]); |
485 |
> |
free((void *)zbar[i]); |
486 |
|
} |
458 |
– |
fwritescan(scanbar[0], hres, stdout); |
459 |
– |
if (fflush(stdout) == EOF) |
460 |
– |
goto writerr; |
487 |
|
for (i = 0; i <= psample; i++) |
488 |
< |
free((char *)scanbar[i]); |
488 |
> |
free((void *)scanbar[i]); |
489 |
|
if (sampdens != NULL) |
490 |
|
free(sampdens); |
491 |
|
pctdone = 100.0; |
510 |
|
int bl = xstep, b = xstep; |
511 |
|
double z; |
512 |
|
register int i; |
513 |
< |
|
513 |
> |
|
514 |
|
z = pixvalue(scanline[0], 0, y); |
515 |
|
if (zline) zline[0] = z; |
516 |
|
/* zig-zag start for quincunx pattern */ |
544 |
|
float zline[MAXDIV+1]; |
545 |
|
int b = ysize; |
546 |
|
register int i, j; |
547 |
< |
|
547 |
> |
|
548 |
|
for (i = 0; i < xres; i++) { |
523 |
– |
|
549 |
|
copycolor(vline[0], scanbar[0][i]); |
550 |
|
copycolor(vline[ysize], scanbar[ysize][i]); |
551 |
|
if (zbar[0]) { |
552 |
|
zline[0] = zbar[0][i]; |
553 |
|
zline[ysize] = zbar[ysize][i]; |
554 |
|
} |
530 |
– |
|
555 |
|
b = fillsample(vline, zbar[0] ? zline : (float *)NULL, |
556 |
|
i, y, 0, ysize, b/2); |
557 |
< |
|
557 |
> |
|
558 |
|
for (j = 1; j < ysize; j++) |
559 |
|
copycolor(scanbar[j][i], vline[j]); |
560 |
|
if (zbar[0]) |
577 |
|
COLOR ctmp; |
578 |
|
int ncut; |
579 |
|
register int len; |
580 |
< |
|
580 |
> |
|
581 |
|
if (xlen > 0) /* x or y length is zero */ |
582 |
|
len = xlen; |
583 |
|
else |
584 |
|
len = ylen; |
585 |
< |
|
585 |
> |
|
586 |
|
if (len <= 1) /* limit recursion */ |
587 |
|
return(0); |
588 |
< |
|
589 |
< |
if (b > 0 |
590 |
< |
|| (zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
588 |
> |
|
589 |
> |
if (b > 0 || |
590 |
> |
(zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
591 |
|
|| bigdiff(colline[0], colline[len], maxdiff)) { |
592 |
< |
|
592 |
> |
|
593 |
|
z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
594 |
|
if (zline) zline[len>>1] = z; |
595 |
|
ncut = 1; |
572 |
– |
|
596 |
|
} else { /* interpolate */ |
574 |
– |
|
597 |
|
copycolor(colline[len>>1], colline[len]); |
598 |
|
ratio = (double)(len>>1) / len; |
599 |
|
scalecolor(colline[len>>1], ratio); |
607 |
|
} |
608 |
|
/* recurse */ |
609 |
|
ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
610 |
< |
|
610 |
> |
|
611 |
|
ncut += fillsample(colline+(len>>1), |
612 |
|
zline ? zline+(len>>1) : (float *)NULL, |
613 |
|
x+(xlen>>1), y+(ylen>>1), |
622 |
|
COLOR col; /* returned color */ |
623 |
|
int x, y; /* pixel position */ |
624 |
|
{ |
625 |
< |
static RAY thisray; |
626 |
< |
|
627 |
< |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, &ourview, |
628 |
< |
(x+pixjitter())/hres, (y+pixjitter())/vres)) < -FTINY) { |
625 |
> |
RAY thisray; |
626 |
> |
FVECT lorg, ldir; |
627 |
> |
double hpos, vpos, lmax, d; |
628 |
> |
/* compute view ray */ |
629 |
> |
hpos = (x+pixjitter())/hres; |
630 |
> |
vpos = (y+pixjitter())/vres; |
631 |
> |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
632 |
> |
&ourview, hpos, vpos)) < -FTINY) { |
633 |
|
setcolor(col, 0.0, 0.0, 0.0); |
634 |
|
return(0.0); |
635 |
|
} |
636 |
|
|
611 |
– |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
612 |
– |
|
637 |
|
samplendx = pixnumber(x,y,hres,vres); /* set pixel index */ |
638 |
|
|
639 |
+ |
/* optional motion blur */ |
640 |
+ |
if (lastview.type && mblur > FTINY && (lmax = viewray(lorg, ldir, |
641 |
+ |
&lastview, hpos, vpos)) >= -FTINY) { |
642 |
+ |
register int i; |
643 |
+ |
register double d = mblur*(.5-urand(281+samplendx)); |
644 |
+ |
|
645 |
+ |
thisray.rmax = (1.-d)*thisray.rmax + d*lmax; |
646 |
+ |
for (i = 3; i--; ) { |
647 |
+ |
thisray.rorg[i] = (1.-d)*thisray.rorg[i] + d*lorg[i]; |
648 |
+ |
thisray.rdir[i] = (1.-d)*thisray.rdir[i] + d*ldir[i]; |
649 |
+ |
} |
650 |
+ |
if (normalize(thisray.rdir) == 0.0) |
651 |
+ |
return(0.0); |
652 |
+ |
} |
653 |
+ |
|
654 |
+ |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
655 |
+ |
|
656 |
|
rayvalue(&thisray); /* trace ray */ |
657 |
|
|
658 |
|
copycolor(col, thisray.rcol); /* return color */ |
659 |
< |
|
659 |
> |
|
660 |
|
return(thisray.rt); /* return distance */ |
661 |
|
} |
662 |
|
|
708 |
|
} |
709 |
|
if (fflush(stdout) == EOF) |
710 |
|
goto writerr; |
711 |
< |
free((char *)scanline); |
711 |
> |
free((void *)scanline); |
712 |
|
fclose(fp); |
713 |
|
unlink(oldfile); |
714 |
|
return(y); |