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/* Copyright (c) 1993 Regents of the University of California */ |
2 |
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|
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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 |
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|
4 |
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/* |
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* rpict.c - routines and variables for picture generation. |
9 |
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* |
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* 8/14/85 |
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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 "platform.h" |
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#include "ray.h" |
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|
13 |
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#include <sys/types.h> |
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|
15 |
< |
#ifndef NIX |
15 |
> |
#ifndef NON_POSIX |
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#ifdef BSD |
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#include <sys/time.h> |
18 |
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#include <sys/resource.h> |
19 |
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#else |
20 |
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#include <sys/times.h> |
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#include <sys/utsname.h> |
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#include <unistd.h> |
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#endif |
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#endif |
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|
25 |
< |
extern time_t time(); |
29 |
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|
25 |
> |
#include <time.h> |
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#include <signal.h> |
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|
28 |
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#include "view.h" |
33 |
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|
34 |
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#include "resolu.h" |
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|
29 |
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#include "random.h" |
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|
30 |
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#include "paths.h" |
31 |
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#include "rtmisc.h" /* myhostname() */ |
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|
33 |
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|
34 |
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#define RFTEMPLATE "rfXXXXXX" |
35 |
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|
36 |
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#ifndef SIGCONT |
37 |
+ |
#ifdef SIGIO /* XXX can we live without this? */ |
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#define SIGCONT SIGIO |
39 |
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#endif |
40 |
+ |
#endif |
41 |
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|
42 |
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CUBE thescene; /* our scene */ |
43 |
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OBJECT nsceneobjs; /* number of objects in our scene */ |
44 |
+ |
|
45 |
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int dimlist[MAXDIM]; /* sampling dimensions */ |
46 |
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int ndims = 0; /* number of sampling dimensions */ |
47 |
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int samplendx; /* sample index number */ |
48 |
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|
49 |
+ |
extern void ambnotify(); |
50 |
+ |
void (*addobjnotify[])() = {ambnotify, NULL}; |
51 |
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|
52 |
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VIEW ourview = STDVIEW; /* view parameters */ |
53 |
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int hresolu = 512; /* horizontal resolution */ |
54 |
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int vresolu = 512; /* vertical resolution */ |
58 |
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double maxdiff = .05; /* max. difference for interpolation */ |
59 |
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double dstrpix = 0.67; /* square pixel distribution */ |
60 |
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|
61 |
+ |
double mblur = 0.; /* motion blur parameter */ |
62 |
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|
63 |
+ |
void (*trace)() = NULL; /* trace call */ |
64 |
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|
65 |
+ |
int do_irrad = 0; /* compute irradiance? */ |
66 |
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|
67 |
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double dstrsrc = 0.0; /* square source distribution */ |
68 |
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double shadthresh = .05; /* shadow threshold */ |
69 |
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double shadcert = .5; /* shadow certainty */ |
72 |
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int directvis = 1; /* sources visible? */ |
73 |
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double srcsizerat = .25; /* maximum ratio source size/dist. */ |
74 |
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|
75 |
+ |
COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
76 |
+ |
COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
77 |
+ |
double seccg = 0.; /* global scattering eccentricity */ |
78 |
+ |
double ssampdist = 0.; /* scatter sampling distance */ |
79 |
+ |
|
80 |
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double specthresh = .15; /* specular sampling threshold */ |
81 |
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double specjitter = 1.; /* specular sampling jitter */ |
82 |
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|
83 |
< |
int maxdepth = 6; /* maximum recursion depth */ |
71 |
< |
double minweight = 5e-3; /* minimum ray weight */ |
83 |
> |
int backvis = 1; /* back face visibility */ |
84 |
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|
85 |
+ |
int maxdepth = 7; /* maximum recursion depth */ |
86 |
+ |
double minweight = 4e-3; /* minimum ray weight */ |
87 |
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|
88 |
+ |
char *ambfile = NULL; /* ambient file name */ |
89 |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
90 |
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double ambacc = 0.2; /* ambient accuracy */ |
91 |
< |
int ambres = 32; /* ambient resolution */ |
92 |
< |
int ambdiv = 128; /* ambient divisions */ |
93 |
< |
int ambssamp = 0; /* ambient super-samples */ |
90 |
> |
int ambvwt = 0; /* initial weight for ambient value */ |
91 |
> |
double ambacc = 0.15; /* ambient accuracy */ |
92 |
> |
int ambres = 64; /* ambient resolution */ |
93 |
> |
int ambdiv = 512; /* ambient divisions */ |
94 |
> |
int ambssamp = 128; /* ambient super-samples */ |
95 |
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int ambounce = 0; /* ambient bounces */ |
96 |
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char *amblist[128]; /* ambient include/exclude list */ |
97 |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
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|
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#ifdef MSDOS |
83 |
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int ralrm = 60; /* seconds between reports */ |
84 |
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#else |
99 |
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int ralrm = 0; /* seconds between reports */ |
86 |
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#endif |
100 |
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|
101 |
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double pctdone = 0.0; /* percentage done */ |
89 |
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|
102 |
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time_t tlastrept = 0L; /* time at last report */ |
103 |
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time_t tstart; /* starting time */ |
104 |
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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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|
105 |
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#define MAXDIV 16 /* maximum sample size */ |
106 |
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|
107 |
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#define pixjitter() (.5+dstrpix*(.5-frandom())) |
108 |
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|
109 |
< |
static int hres, vres; /* resolution for this frame */ |
109 |
> |
int hres, vres; /* resolution for this frame */ |
110 |
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|
111 |
< |
extern char *mktemp(); |
111 |
> |
static VIEW lastview; /* the previous view input */ |
112 |
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|
113 |
+ |
extern char *mktemp(); /* XXX should be in stdlib.h or unistd.h */ |
114 |
+ |
|
115 |
+ |
void report(); |
116 |
+ |
|
117 |
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double pixvalue(); |
118 |
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|
119 |
< |
#ifdef NIX |
107 |
< |
#define file_exists(f) (access(f,F_OK)==0) |
108 |
< |
#else |
119 |
> |
#ifdef RHAS_STAT |
120 |
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#include <sys/types.h> |
121 |
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#include <sys/stat.h> |
122 |
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int |
127 |
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if (stat(fname, &sbuf) < 0) return(0); |
128 |
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return((sbuf.st_mode & S_IFREG) != 0); |
129 |
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} |
130 |
+ |
#else |
131 |
+ |
#define file_exists(f) (access(f,F_OK)==0) |
132 |
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#endif |
133 |
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|
134 |
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|
135 |
+ |
void |
136 |
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quit(code) /* quit program */ |
137 |
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int code; |
138 |
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{ |
139 |
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if (code) /* report status */ |
140 |
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report(); |
141 |
+ |
#ifndef NON_POSIX |
142 |
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headclean(); /* delete header file */ |
143 |
|
pfclean(); /* clean up persist files */ |
144 |
+ |
#endif |
145 |
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exit(code); |
146 |
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} |
147 |
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|
148 |
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|
149 |
< |
#ifndef NIX |
149 |
> |
#ifndef NON_POSIX |
150 |
> |
void |
151 |
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report() /* report progress */ |
152 |
|
{ |
153 |
|
double u, s; |
154 |
|
#ifdef BSD |
138 |
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char hostname[257]; |
155 |
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struct rusage rubuf; |
156 |
|
#else |
157 |
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struct tms tbuf; |
142 |
– |
struct utsname nambuf; |
158 |
|
double period; |
144 |
– |
#define hostname nambuf.nodename |
159 |
|
#endif |
160 |
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|
161 |
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tlastrept = time((time_t *)NULL); |
166 |
|
getrusage(RUSAGE_CHILDREN, &rubuf); |
167 |
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u += rubuf.ru_utime.tv_sec + rubuf.ru_utime.tv_usec/1e6; |
168 |
|
s += rubuf.ru_stime.tv_sec + rubuf.ru_stime.tv_usec/1e6; |
155 |
– |
gethostname(hostname, sizeof(hostname)); |
169 |
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#else |
170 |
|
times(&tbuf); |
171 |
|
#ifdef _SC_CLK_TCK |
175 |
|
#endif |
176 |
|
u = ( tbuf.tms_utime + tbuf.tms_cutime ) * period; |
177 |
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s = ( tbuf.tms_stime + tbuf.tms_cstime ) * period; |
165 |
– |
uname(&nambuf); |
178 |
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#endif |
179 |
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|
180 |
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sprintf(errmsg, |
181 |
|
"%lu rays, %4.2f%% after %.3fu %.3fs %.3fr hours on %s\n", |
182 |
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nrays, pctdone, u/3600., s/3600., |
183 |
< |
(tlastrept-tstart)/3600., hostname); |
183 |
> |
(tlastrept-tstart)/3600., myhostname()); |
184 |
|
eputs(errmsg); |
185 |
< |
#ifndef BSD |
185 |
> |
#ifdef SIGCONT |
186 |
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signal(SIGCONT, report); |
175 |
– |
#undef hostname |
187 |
|
#endif |
188 |
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} |
189 |
|
#else |
190 |
+ |
void |
191 |
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report() /* report progress */ |
192 |
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{ |
193 |
|
tlastrept = time((time_t *)NULL); |
198 |
|
#endif |
199 |
|
|
200 |
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|
201 |
+ |
void |
202 |
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rpict(seq, pout, zout, prvr) /* generate image(s) */ |
203 |
|
int seq; |
204 |
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char *pout, *zout, *prvr; |
214 |
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* sequenced file naming. |
215 |
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*/ |
216 |
|
{ |
204 |
– |
extern char *rindex(), *strncpy(), *strcat(), *strcpy(); |
217 |
|
char fbuf[128], fbuf2[128]; |
218 |
|
int npicts; |
219 |
|
register char *cp; |
240 |
|
for ( ; seq < rn; seq++) |
241 |
|
if (nextview(stdin) == EOF) |
242 |
|
error(USER, "unexpected EOF on view input"); |
243 |
+ |
setview(&ourview); |
244 |
|
prvr = fbuf; /* mark for renaming */ |
245 |
|
} |
246 |
< |
if (pout != NULL & prvr != NULL) { |
246 |
> |
if ((pout != NULL) & (prvr != NULL)) { |
247 |
|
sprintf(fbuf, pout, seq); |
248 |
|
if (!strcmp(prvr, fbuf)) { /* rename */ |
249 |
|
strcpy(fbuf2, fbuf); |
253 |
|
cp--; |
254 |
|
strcpy(cp, RFTEMPLATE); |
255 |
|
prvr = mktemp(fbuf2); |
256 |
< |
if (rename(fbuf, prvr) < 0) |
256 |
> |
if (rename(fbuf, prvr) < 0) { |
257 |
|
if (errno == ENOENT) { /* ghost file */ |
258 |
|
sprintf(errmsg, |
259 |
|
"new output file \"%s\"", |
266 |
|
fbuf, prvr); |
267 |
|
error(SYSTEM, errmsg); |
268 |
|
} |
269 |
+ |
} |
270 |
|
} |
271 |
|
} |
272 |
|
npicts = 0; /* render sequence */ |
283 |
|
fbuf); |
284 |
|
error(USER, errmsg); |
285 |
|
} |
286 |
+ |
setview(&ourview); |
287 |
|
continue; /* don't clobber */ |
288 |
|
} |
289 |
|
if (freopen(fbuf, "w", stdout) == NULL) { |
291 |
|
"cannot open output file \"%s\"", fbuf); |
292 |
|
error(SYSTEM, errmsg); |
293 |
|
} |
294 |
< |
#ifdef MSDOS |
280 |
< |
setmode(fileno(stdout), O_BINARY); |
281 |
< |
#endif |
294 |
> |
SET_FILE_BINARY(stdout); |
295 |
|
dupheader(); |
296 |
|
} |
297 |
|
hres = hresolu; vres = vresolu; pa = pixaspect; |
298 |
< |
if (prvr != NULL) |
299 |
< |
if (viewfile(prvr, &ourview, &rs) <= 0 |
287 |
< |
|| rs.or != PIXSTANDARD) { |
298 |
> |
if (prvr != NULL) { |
299 |
> |
if (viewfile(prvr, &ourview, &rs) <= 0) { |
300 |
|
sprintf(errmsg, |
301 |
|
"cannot recover view parameters from \"%s\"", prvr); |
302 |
|
error(WARNING, errmsg); |
305 |
|
hres = scanlen(&rs); |
306 |
|
vres = numscans(&rs); |
307 |
|
} |
308 |
+ |
} |
309 |
|
if ((cp = setview(&ourview)) != NULL) |
310 |
|
error(USER, cp); |
311 |
|
normaspect(viewaspect(&ourview), &pa, &hres, &vres); |
323 |
|
putchar('\n'); |
324 |
|
if (pa < .99 || pa > 1.01) |
325 |
|
fputaspect(pa, stdout); |
326 |
+ |
fputnow(stdout); |
327 |
|
fputformat(COLRFMT, stdout); |
328 |
|
putchar('\n'); |
329 |
|
if (zout != NULL) |
345 |
|
{ |
346 |
|
char linebuf[256]; |
347 |
|
|
348 |
+ |
lastview = ourview; |
349 |
|
while (fgets(linebuf, sizeof(linebuf), fp) != NULL) |
350 |
|
if (isview(linebuf) && sscanview(&ourview, linebuf) > 0) |
351 |
|
return(0); |
356 |
|
render(zfile, oldfile) /* render the scene */ |
357 |
|
char *zfile, *oldfile; |
358 |
|
{ |
344 |
– |
extern long lseek(); |
359 |
|
COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
360 |
|
float *zbar[MAXDIV+1]; /* z values */ |
361 |
|
char *sampdens; /* previous sample density */ |
366 |
|
COLOR *colptr; |
367 |
|
float *zptr; |
368 |
|
register int i; |
369 |
+ |
/* check for empty image */ |
370 |
+ |
if (hres <= 0 || vres <= 0) { |
371 |
+ |
error(WARNING, "empty output picture"); |
372 |
+ |
fprtresolu(0, 0, stdout); |
373 |
+ |
return; |
374 |
+ |
} |
375 |
|
/* allocate scanlines */ |
376 |
|
for (i = 0; i <= psample; i++) { |
377 |
|
scanbar[i] = (COLOR *)malloc(hres*sizeof(COLOR)); |
382 |
|
ystep = (psample*99+70)/140; |
383 |
|
if (hstep > 2) { |
384 |
|
i = hres/hstep + 2; |
385 |
< |
if ((sampdens = malloc(i)) == NULL) |
385 |
> |
if ((sampdens = (char *)malloc(i)) == NULL) |
386 |
|
goto memerr; |
387 |
|
while (i--) |
388 |
|
sampdens[i] = hstep; |
394 |
|
sprintf(errmsg, "cannot open z-file \"%s\"", zfile); |
395 |
|
error(SYSTEM, errmsg); |
396 |
|
} |
397 |
< |
#ifdef MSDOS |
378 |
< |
setmode(zfd, O_BINARY); |
379 |
< |
#endif |
397 |
> |
SET_FD_BINARY(zfd); |
398 |
|
for (i = 0; i <= psample; i++) { |
399 |
|
zbar[i] = (float *)malloc(hres*sizeof(float)); |
400 |
|
if (zbar[i] == NULL) |
409 |
|
fprtresolu(hres, vres, stdout); |
410 |
|
/* recover file and compute first */ |
411 |
|
i = salvage(oldfile); |
412 |
+ |
if (i >= vres) |
413 |
+ |
goto alldone; |
414 |
|
if (zfd != -1 && i > 0 && |
415 |
< |
lseek(zfd, (long)i*hres*sizeof(float), 0) == -1) |
415 |
> |
lseek(zfd, (off_t)i*hres*sizeof(float), SEEK_SET) < 0) |
416 |
|
error(SYSTEM, "z-file seek error in render"); |
417 |
|
pctdone = 100.0*i/vres; |
418 |
|
if (ralrm > 0) /* report init stats */ |
419 |
|
report(); |
420 |
< |
#ifndef BSD |
420 |
> |
#ifdef SIGCONT |
421 |
|
else |
402 |
– |
#endif |
422 |
|
signal(SIGCONT, report); |
423 |
< |
ypos = vres-1 - i; |
423 |
> |
#endif |
424 |
> |
ypos = vres-1 - i; /* initialize sampling */ |
425 |
> |
if (directvis) |
426 |
> |
init_drawsources(psample); |
427 |
|
fillscanline(scanbar[0], zbar[0], sampdens, hres, ypos, hstep); |
428 |
|
/* compute scanlines */ |
429 |
|
for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
443 |
|
hres, ypos, hstep); |
444 |
|
/* fill bar */ |
445 |
|
fillscanbar(scanbar, zbar, hres, ypos, ystep); |
446 |
+ |
if (directvis) /* add bitty sources */ |
447 |
+ |
drawsources(scanbar, zbar, 0, hres, ypos, ystep); |
448 |
|
/* write it out */ |
449 |
< |
#ifndef BSD |
449 |
> |
#ifdef SIGCONT |
450 |
|
signal(SIGCONT, SIG_IGN); /* don't interrupt writes */ |
451 |
|
#endif |
452 |
|
for (i = ystep; i > 0; i--) { |
463 |
|
pctdone = 100.0*(vres-1-ypos)/vres; |
464 |
|
if (ralrm > 0 && time((time_t *)NULL) >= tlastrept+ralrm) |
465 |
|
report(); |
466 |
< |
#ifndef BSD |
466 |
> |
#ifdef SIGCONT |
467 |
|
else |
468 |
|
signal(SIGCONT, report); |
469 |
|
#endif |
470 |
|
} |
471 |
|
/* clean up */ |
472 |
+ |
#ifdef SIGCONT |
473 |
|
signal(SIGCONT, SIG_IGN); |
474 |
< |
if (zfd != -1) { |
475 |
< |
if (write(zfd, (char *)zbar[0], hres*sizeof(float)) |
474 |
> |
#endif |
475 |
> |
if (zfd != -1 && write(zfd, (char *)zbar[0], hres*sizeof(float)) |
476 |
|
< hres*sizeof(float)) |
477 |
< |
goto writerr; |
477 |
> |
goto writerr; |
478 |
> |
fwritescan(scanbar[0], hres, stdout); |
479 |
> |
if (fflush(stdout) == EOF) |
480 |
> |
goto writerr; |
481 |
> |
alldone: |
482 |
> |
if (zfd != -1) { |
483 |
|
if (close(zfd) == -1) |
484 |
|
goto writerr; |
485 |
|
for (i = 0; i <= psample; i++) |
486 |
< |
free((char *)zbar[i]); |
486 |
> |
free((void *)zbar[i]); |
487 |
|
} |
458 |
– |
fwritescan(scanbar[0], hres, stdout); |
459 |
– |
if (fflush(stdout) == EOF) |
460 |
– |
goto writerr; |
488 |
|
for (i = 0; i <= psample; i++) |
489 |
< |
free((char *)scanbar[i]); |
489 |
> |
free((void *)scanbar[i]); |
490 |
|
if (sampdens != NULL) |
491 |
|
free(sampdens); |
492 |
|
pctdone = 100.0; |
493 |
|
if (ralrm > 0) |
494 |
|
report(); |
495 |
+ |
#ifdef SIGCONT |
496 |
|
signal(SIGCONT, SIG_DFL); |
497 |
+ |
#endif |
498 |
|
return; |
499 |
|
writerr: |
500 |
|
error(SYSTEM, "write error in render"); |
513 |
|
int bl = xstep, b = xstep; |
514 |
|
double z; |
515 |
|
register int i; |
516 |
< |
|
516 |
> |
|
517 |
|
z = pixvalue(scanline[0], 0, y); |
518 |
|
if (zline) zline[0] = z; |
519 |
|
/* zig-zag start for quincunx pattern */ |
529 |
|
b = fillsample(scanline, zline, 0, y, i, 0, b/2); |
530 |
|
else |
531 |
|
b = fillsample(scanline+i-xstep, |
532 |
< |
zline ? zline+i-xstep : NULL, |
532 |
> |
zline ? zline+i-xstep : (float *)NULL, |
533 |
|
i-xstep, y, xstep, 0, b/2); |
534 |
|
if (sd) *sd++ = nc & 1 ? bl : b; |
535 |
|
bl = b; |
547 |
|
float zline[MAXDIV+1]; |
548 |
|
int b = ysize; |
549 |
|
register int i, j; |
550 |
< |
|
550 |
> |
|
551 |
|
for (i = 0; i < xres; i++) { |
523 |
– |
|
552 |
|
copycolor(vline[0], scanbar[0][i]); |
553 |
|
copycolor(vline[ysize], scanbar[ysize][i]); |
554 |
|
if (zbar[0]) { |
555 |
|
zline[0] = zbar[0][i]; |
556 |
|
zline[ysize] = zbar[ysize][i]; |
557 |
|
} |
558 |
< |
|
531 |
< |
b = fillsample(vline, zbar[0] ? zline : NULL, |
558 |
> |
b = fillsample(vline, zbar[0] ? zline : (float *)NULL, |
559 |
|
i, y, 0, ysize, b/2); |
560 |
< |
|
560 |
> |
|
561 |
|
for (j = 1; j < ysize; j++) |
562 |
|
copycolor(scanbar[j][i], vline[j]); |
563 |
|
if (zbar[0]) |
580 |
|
COLOR ctmp; |
581 |
|
int ncut; |
582 |
|
register int len; |
583 |
< |
|
583 |
> |
|
584 |
|
if (xlen > 0) /* x or y length is zero */ |
585 |
|
len = xlen; |
586 |
|
else |
587 |
|
len = ylen; |
588 |
< |
|
588 |
> |
|
589 |
|
if (len <= 1) /* limit recursion */ |
590 |
|
return(0); |
591 |
< |
|
592 |
< |
if (b > 0 |
593 |
< |
|| (zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
591 |
> |
|
592 |
> |
if (b > 0 || |
593 |
> |
(zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
594 |
|
|| bigdiff(colline[0], colline[len], maxdiff)) { |
595 |
< |
|
595 |
> |
|
596 |
|
z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
597 |
|
if (zline) zline[len>>1] = z; |
598 |
|
ncut = 1; |
572 |
– |
|
599 |
|
} else { /* interpolate */ |
574 |
– |
|
600 |
|
copycolor(colline[len>>1], colline[len]); |
601 |
|
ratio = (double)(len>>1) / len; |
602 |
|
scalecolor(colline[len>>1], ratio); |
610 |
|
} |
611 |
|
/* recurse */ |
612 |
|
ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
613 |
< |
|
614 |
< |
ncut += fillsample(colline+(len>>1), zline ? zline+(len>>1) : NULL, |
613 |
> |
|
614 |
> |
ncut += fillsample(colline+(len>>1), |
615 |
> |
zline ? zline+(len>>1) : (float *)NULL, |
616 |
|
x+(xlen>>1), y+(ylen>>1), |
617 |
|
xlen-(xlen>>1), ylen-(ylen>>1), b/2); |
618 |
|
|
625 |
|
COLOR col; /* returned color */ |
626 |
|
int x, y; /* pixel position */ |
627 |
|
{ |
628 |
< |
static RAY thisray; |
629 |
< |
|
630 |
< |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
631 |
< |
(x+pixjitter())/hres, (y+pixjitter())/vres) < 0) { |
628 |
> |
RAY thisray; |
629 |
> |
FVECT lorg, ldir; |
630 |
> |
double hpos, vpos, lmax, d; |
631 |
> |
/* compute view ray */ |
632 |
> |
hpos = (x+pixjitter())/hres; |
633 |
> |
vpos = (y+pixjitter())/vres; |
634 |
> |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
635 |
> |
&ourview, hpos, vpos)) < -FTINY) { |
636 |
|
setcolor(col, 0.0, 0.0, 0.0); |
637 |
|
return(0.0); |
638 |
|
} |
639 |
|
|
610 |
– |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
611 |
– |
|
640 |
|
samplendx = pixnumber(x,y,hres,vres); /* set pixel index */ |
641 |
|
|
642 |
+ |
/* optional motion blur */ |
643 |
+ |
if (lastview.type && mblur > FTINY && (lmax = viewray(lorg, ldir, |
644 |
+ |
&lastview, hpos, vpos)) >= -FTINY) { |
645 |
+ |
register int i; |
646 |
+ |
register double d = mblur*(.5-urand(281+samplendx)); |
647 |
+ |
|
648 |
+ |
thisray.rmax = (1.-d)*thisray.rmax + d*lmax; |
649 |
+ |
for (i = 3; i--; ) { |
650 |
+ |
thisray.rorg[i] = (1.-d)*thisray.rorg[i] + d*lorg[i]; |
651 |
+ |
thisray.rdir[i] = (1.-d)*thisray.rdir[i] + d*ldir[i]; |
652 |
+ |
} |
653 |
+ |
if (normalize(thisray.rdir) == 0.0) |
654 |
+ |
return(0.0); |
655 |
+ |
} |
656 |
+ |
|
657 |
+ |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
658 |
+ |
|
659 |
|
rayvalue(&thisray); /* trace ray */ |
660 |
|
|
661 |
|
copycolor(col, thisray.rcol); /* return color */ |
662 |
< |
|
662 |
> |
|
663 |
|
return(thisray.rt); /* return distance */ |
664 |
|
} |
665 |
|
|
680 |
|
error(WARNING, errmsg); |
681 |
|
goto gotzip; |
682 |
|
} |
683 |
< |
#ifdef MSDOS |
639 |
< |
setmode(fileno(fp), O_BINARY); |
640 |
< |
#endif |
683 |
> |
SET_FILE_BINARY(fp); |
684 |
|
/* discard header */ |
685 |
|
getheader(fp, NULL, NULL); |
686 |
|
/* get picture size */ |
709 |
|
} |
710 |
|
if (fflush(stdout) == EOF) |
711 |
|
goto writerr; |
712 |
< |
free((char *)scanline); |
712 |
> |
free((void *)scanline); |
713 |
|
fclose(fp); |
714 |
|
unlink(oldfile); |
715 |
|
return(y); |