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/* Copyright (c) 1994 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"; |
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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 |
17 |
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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> |
23 |
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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" |
37 |
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|
30 |
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#include "paths.h" |
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|
32 |
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|
33 |
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#define RFTEMPLATE "rfXXXXXX" |
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|
35 |
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#ifndef SIGCONT |
36 |
+ |
#ifdef SIGIO /* XXX can we live without this? */ |
37 |
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#define SIGCONT SIGIO |
38 |
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#endif |
39 |
+ |
#endif |
40 |
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|
41 |
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CUBE thescene; /* our scene */ |
42 |
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OBJECT nsceneobjs; /* number of objects in our scene */ |
43 |
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|
44 |
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int dimlist[MAXDIM]; /* sampling dimensions */ |
45 |
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int ndims = 0; /* number of sampling dimensions */ |
46 |
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int samplendx; /* sample index number */ |
47 |
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|
48 |
+ |
extern void ambnotify(); |
49 |
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void (*addobjnotify[])() = {ambnotify, NULL}; |
50 |
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|
51 |
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VIEW ourview = STDVIEW; /* view parameters */ |
52 |
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int hresolu = 512; /* horizontal resolution */ |
53 |
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int vresolu = 512; /* vertical resolution */ |
57 |
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double maxdiff = .05; /* max. difference for interpolation */ |
58 |
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double dstrpix = 0.67; /* square pixel distribution */ |
59 |
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|
60 |
+ |
double mblur = 0.; /* motion blur parameter */ |
61 |
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|
62 |
+ |
void (*trace)() = NULL; /* trace call */ |
63 |
+ |
|
64 |
+ |
int do_irrad = 0; /* compute irradiance? */ |
65 |
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|
66 |
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double dstrsrc = 0.0; /* square source distribution */ |
67 |
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double shadthresh = .05; /* shadow threshold */ |
68 |
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double shadcert = .5; /* shadow certainty */ |
71 |
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int directvis = 1; /* sources visible? */ |
72 |
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double srcsizerat = .25; /* maximum ratio source size/dist. */ |
73 |
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|
74 |
+ |
COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
75 |
+ |
COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
76 |
+ |
double seccg = 0.; /* global scattering eccentricity */ |
77 |
+ |
double ssampdist = 0.; /* scatter sampling distance */ |
78 |
+ |
|
79 |
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double specthresh = .15; /* specular sampling threshold */ |
80 |
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double specjitter = 1.; /* specular sampling jitter */ |
81 |
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|
82 |
< |
int maxdepth = 6; /* maximum recursion depth */ |
71 |
< |
double minweight = 5e-3; /* minimum ray weight */ |
82 |
> |
int backvis = 1; /* back face visibility */ |
83 |
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|
84 |
+ |
int maxdepth = 7; /* maximum recursion depth */ |
85 |
+ |
double minweight = 4e-3; /* minimum ray weight */ |
86 |
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|
87 |
+ |
char *ambfile = NULL; /* ambient file name */ |
88 |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
89 |
< |
double ambacc = 0.2; /* ambient accuracy */ |
90 |
< |
int ambres = 32; /* ambient resolution */ |
91 |
< |
int ambdiv = 128; /* ambient divisions */ |
92 |
< |
int ambssamp = 0; /* ambient super-samples */ |
89 |
> |
int ambvwt = 0; /* initial weight for ambient value */ |
90 |
> |
double ambacc = 0.15; /* ambient accuracy */ |
91 |
> |
int ambres = 64; /* ambient resolution */ |
92 |
> |
int ambdiv = 512; /* ambient divisions */ |
93 |
> |
int ambssamp = 128; /* ambient super-samples */ |
94 |
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int ambounce = 0; /* ambient bounces */ |
95 |
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char *amblist[128]; /* ambient include/exclude list */ |
96 |
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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 |
98 |
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int ralrm = 0; /* seconds between reports */ |
86 |
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#endif |
99 |
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|
100 |
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double pctdone = 0.0; /* percentage done */ |
89 |
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|
101 |
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time_t tlastrept = 0L; /* time at last report */ |
102 |
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time_t tstart; /* starting time */ |
103 |
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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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|
104 |
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#define MAXDIV 16 /* maximum sample size */ |
105 |
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|
106 |
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#define pixjitter() (.5+dstrpix*(.5-frandom())) |
107 |
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|
108 |
< |
static int hres, vres; /* resolution for this frame */ |
108 |
> |
int hres, vres; /* resolution for this frame */ |
109 |
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|
110 |
< |
extern char *mktemp(); |
110 |
> |
static VIEW lastview; /* the previous view input */ |
111 |
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|
112 |
+ |
extern char *mktemp(); /* XXX should be in stdlib.h or unistd.h */ |
113 |
+ |
|
114 |
+ |
void report(); |
115 |
+ |
|
116 |
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double pixvalue(); |
117 |
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|
118 |
< |
#ifdef NIX |
107 |
< |
#define file_exists(f) (access(f,F_OK)==0) |
108 |
< |
#else |
118 |
> |
#ifdef RHAS_STAT |
119 |
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#include <sys/types.h> |
120 |
|
#include <sys/stat.h> |
121 |
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int |
126 |
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if (stat(fname, &sbuf) < 0) return(0); |
127 |
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return((sbuf.st_mode & S_IFREG) != 0); |
128 |
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} |
129 |
+ |
#else |
130 |
+ |
#define file_exists(f) (access(f,F_OK)==0) |
131 |
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#endif |
132 |
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|
133 |
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|
134 |
+ |
void |
135 |
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quit(code) /* quit program */ |
136 |
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int code; |
137 |
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{ |
138 |
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if (code) /* report status */ |
139 |
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report(); |
140 |
+ |
#ifndef NON_POSIX |
141 |
|
headclean(); /* delete header file */ |
142 |
|
pfclean(); /* clean up persist files */ |
143 |
+ |
#endif |
144 |
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exit(code); |
145 |
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} |
146 |
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|
147 |
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|
148 |
< |
#ifndef NIX |
148 |
> |
#ifndef NON_POSIX |
149 |
> |
void |
150 |
|
report() /* report progress */ |
151 |
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{ |
152 |
+ |
extern char *myhostname(); |
153 |
|
double u, s; |
154 |
|
#ifdef BSD |
138 |
– |
char hostname[257]; |
155 |
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struct rusage rubuf; |
156 |
|
#else |
157 |
|
struct tms tbuf; |
142 |
– |
struct utsname nambuf; |
158 |
|
double period; |
144 |
– |
#define hostname nambuf.nodename |
159 |
|
#endif |
160 |
|
|
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 |
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u = ( tbuf.tms_utime + tbuf.tms_cutime ) * period; |
177 |
|
s = ( tbuf.tms_stime + tbuf.tms_cstime ) * period; |
165 |
– |
uname(&nambuf); |
178 |
|
#endif |
179 |
|
|
180 |
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sprintf(errmsg, |
181 |
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"%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 |
|
signal(SIGCONT, report); |
175 |
– |
#undef hostname |
187 |
|
#endif |
188 |
|
} |
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 |
|
|
201 |
+ |
void |
202 |
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rpict(seq, pout, zout, prvr) /* generate image(s) */ |
203 |
|
int seq; |
204 |
|
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) |
298 |
> |
if (prvr != NULL) { |
299 |
|
if (viewfile(prvr, &ourview, &rs) <= 0 |
300 |
< |
|| rs.or != PIXSTANDARD) { |
300 |
> |
|| rs.rt != PIXSTANDARD) { |
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 |
|
{ |
344 |
– |
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 |
378 |
< |
setmode(zfd, O_BINARY); |
379 |
< |
#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) |
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 */ |
420 |
|
report(); |
421 |
< |
#ifndef BSD |
421 |
> |
#ifdef SIGCONT |
422 |
|
else |
402 |
– |
#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 |
< |
if (zfd != -1) { |
476 |
< |
if (write(zfd, (char *)zbar[0], hres*sizeof(float)) |
475 |
> |
#endif |
476 |
> |
if (zfd != -1 && write(zfd, (char *)zbar[0], hres*sizeof(float)) |
477 |
|
< hres*sizeof(float)) |
478 |
< |
goto writerr; |
478 |
> |
goto writerr; |
479 |
> |
fwritescan(scanbar[0], hres, stdout); |
480 |
> |
if (fflush(stdout) == EOF) |
481 |
> |
goto writerr; |
482 |
> |
alldone: |
483 |
> |
if (zfd != -1) { |
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 |
|
} |
458 |
– |
fwritescan(scanbar[0], hres, stdout); |
459 |
– |
if (fflush(stdout) == EOF) |
460 |
– |
goto writerr; |
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++) { |
523 |
– |
|
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 |
|
} |
530 |
– |
|
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; |
572 |
– |
|
600 |
|
} else { /* interpolate */ |
574 |
– |
|
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 |
|
|
611 |
– |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
612 |
– |
|
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 |
640 |
< |
setmode(fileno(fp), O_BINARY); |
641 |
< |
#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); |