1 |
greg |
1.1 |
#ifndef lint |
2 |
greg |
2.54 |
static const char RCSid[] = "$Id"; |
3 |
greg |
1.1 |
#endif |
4 |
|
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/* |
5 |
|
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* rpict.c - routines and variables for picture generation. |
6 |
|
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*/ |
7 |
|
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|
8 |
greg |
2.53 |
#include "copyright.h" |
9 |
greg |
2.52 |
|
10 |
greg |
1.1 |
#include "ray.h" |
11 |
|
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|
12 |
greg |
2.32 |
#include <sys/types.h> |
13 |
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|
14 |
greg |
2.30 |
#ifndef NIX |
15 |
greg |
1.1 |
#ifdef BSD |
16 |
|
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#include <sys/time.h> |
17 |
|
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#include <sys/resource.h> |
18 |
greg |
2.30 |
#else |
19 |
|
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#include <sys/times.h> |
20 |
greg |
2.33 |
#include <unistd.h> |
21 |
greg |
1.34 |
#endif |
22 |
greg |
2.30 |
#endif |
23 |
greg |
1.34 |
|
24 |
greg |
2.32 |
extern time_t time(); |
25 |
|
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|
26 |
greg |
1.14 |
#include <signal.h> |
27 |
greg |
1.1 |
|
28 |
|
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#include "view.h" |
29 |
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30 |
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#include "random.h" |
31 |
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|
32 |
greg |
2.12 |
#include "paths.h" |
33 |
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|
34 |
greg |
2.21 |
#define RFTEMPLATE "rfXXXXXX" |
35 |
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|
36 |
greg |
2.22 |
#ifndef SIGCONT |
37 |
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#define SIGCONT SIGIO |
38 |
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#endif |
39 |
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40 |
greg |
2.52 |
CUBE thescene; /* our scene */ |
41 |
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OBJECT nsceneobjs; /* number of objects in our scene */ |
42 |
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|
43 |
greg |
1.25 |
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 |
greg |
2.52 |
extern void ambnotify(); |
48 |
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void (*addobjnotify[])() = {ambnotify, NULL}; |
49 |
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|
50 |
greg |
1.12 |
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 */ |
53 |
greg |
2.14 |
double pixaspect = 1.0; /* pixel aspect ratio */ |
54 |
greg |
1.1 |
|
55 |
|
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int psample = 4; /* pixel sample size */ |
56 |
greg |
2.14 |
double maxdiff = .05; /* max. difference for interpolation */ |
57 |
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double dstrpix = 0.67; /* square pixel distribution */ |
58 |
greg |
1.1 |
|
59 |
gwlarson |
2.49 |
double mblur = 0.; /* motion blur parameter */ |
60 |
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61 |
greg |
2.52 |
void (*trace)() = NULL; /* trace call */ |
62 |
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63 |
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int do_irrad = 0; /* compute irradiance? */ |
64 |
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65 |
greg |
2.14 |
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 */ |
68 |
greg |
1.35 |
int directrelay = 1; /* number of source relays */ |
69 |
greg |
1.29 |
int vspretest = 512; /* virtual source pretest density */ |
70 |
greg |
2.20 |
int directvis = 1; /* sources visible? */ |
71 |
greg |
2.14 |
double srcsizerat = .25; /* maximum ratio source size/dist. */ |
72 |
greg |
2.41 |
|
73 |
|
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COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
74 |
greg |
2.46 |
COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
75 |
greg |
2.41 |
double seccg = 0.; /* global scattering eccentricity */ |
76 |
|
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double ssampdist = 0.; /* scatter sampling distance */ |
77 |
greg |
1.1 |
|
78 |
greg |
2.14 |
double specthresh = .15; /* specular sampling threshold */ |
79 |
|
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double specjitter = 1.; /* specular sampling jitter */ |
80 |
greg |
2.5 |
|
81 |
greg |
2.40 |
int backvis = 1; /* back face visibility */ |
82 |
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|
83 |
greg |
1.1 |
int maxdepth = 6; /* maximum recursion depth */ |
84 |
greg |
2.14 |
double minweight = 5e-3; /* minimum ray weight */ |
85 |
greg |
1.1 |
|
86 |
greg |
2.52 |
char *ambfile = NULL; /* ambient file name */ |
87 |
greg |
1.1 |
COLOR ambval = BLKCOLOR; /* ambient value */ |
88 |
greg |
2.44 |
int ambvwt = 0; /* initial weight for ambient value */ |
89 |
greg |
2.14 |
double ambacc = 0.2; /* ambient accuracy */ |
90 |
greg |
1.6 |
int ambres = 32; /* ambient resolution */ |
91 |
greg |
1.1 |
int ambdiv = 128; /* ambient divisions */ |
92 |
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int ambssamp = 0; /* ambient super-samples */ |
93 |
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int ambounce = 0; /* ambient bounces */ |
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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97 |
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int ralrm = 0; /* seconds between reports */ |
98 |
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|
99 |
greg |
2.14 |
double pctdone = 0.0; /* percentage done */ |
100 |
greg |
2.32 |
time_t tlastrept = 0L; /* time at last report */ |
101 |
greg |
2.52 |
time_t tstart; /* starting time */ |
102 |
greg |
1.1 |
|
103 |
greg |
2.14 |
#define MAXDIV 16 /* maximum sample size */ |
104 |
greg |
1.1 |
|
105 |
greg |
2.14 |
#define pixjitter() (.5+dstrpix*(.5-frandom())) |
106 |
greg |
1.1 |
|
107 |
greg |
2.47 |
int hres, vres; /* resolution for this frame */ |
108 |
greg |
2.8 |
|
109 |
gwlarson |
2.49 |
static VIEW lastview; /* the previous view input */ |
110 |
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|
111 |
greg |
2.8 |
extern char *mktemp(); |
112 |
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113 |
greg |
2.52 |
void report(); |
114 |
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|
115 |
greg |
2.14 |
double pixvalue(); |
116 |
greg |
1.1 |
|
117 |
greg |
2.27 |
#ifdef NIX |
118 |
|
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#define file_exists(f) (access(f,F_OK)==0) |
119 |
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#else |
120 |
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#include <sys/types.h> |
121 |
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#include <sys/stat.h> |
122 |
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int |
123 |
|
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file_exists(fname) /* ordinary file exists? */ |
124 |
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char *fname; |
125 |
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{ |
126 |
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struct stat sbuf; |
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 |
|
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#endif |
131 |
greg |
1.11 |
|
132 |
greg |
2.27 |
|
133 |
greg |
2.52 |
void |
134 |
greg |
1.1 |
quit(code) /* quit program */ |
135 |
|
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int code; |
136 |
|
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{ |
137 |
greg |
2.8 |
if (code) /* report status */ |
138 |
greg |
1.1 |
report(); |
139 |
greg |
2.52 |
#ifndef NIX |
140 |
greg |
2.21 |
headclean(); /* delete header file */ |
141 |
|
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pfclean(); /* clean up persist files */ |
142 |
greg |
2.52 |
#endif |
143 |
greg |
1.1 |
exit(code); |
144 |
|
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} |
145 |
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146 |
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|
147 |
greg |
2.30 |
#ifndef NIX |
148 |
greg |
2.52 |
void |
149 |
greg |
1.1 |
report() /* report progress */ |
150 |
|
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{ |
151 |
greg |
2.43 |
extern char *myhostname(); |
152 |
greg |
2.30 |
double u, s; |
153 |
|
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#ifdef BSD |
154 |
greg |
1.1 |
struct rusage rubuf; |
155 |
greg |
2.30 |
#else |
156 |
|
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struct tms tbuf; |
157 |
greg |
2.33 |
double period; |
158 |
greg |
2.30 |
#endif |
159 |
greg |
1.1 |
|
160 |
greg |
2.32 |
tlastrept = time((time_t *)NULL); |
161 |
greg |
2.30 |
#ifdef BSD |
162 |
greg |
1.1 |
getrusage(RUSAGE_SELF, &rubuf); |
163 |
greg |
2.30 |
u = rubuf.ru_utime.tv_sec + rubuf.ru_utime.tv_usec/1e6; |
164 |
|
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s = rubuf.ru_stime.tv_sec + rubuf.ru_stime.tv_usec/1e6; |
165 |
greg |
1.1 |
getrusage(RUSAGE_CHILDREN, &rubuf); |
166 |
greg |
2.30 |
u += rubuf.ru_utime.tv_sec + rubuf.ru_utime.tv_usec/1e6; |
167 |
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s += rubuf.ru_stime.tv_sec + rubuf.ru_stime.tv_usec/1e6; |
168 |
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#else |
169 |
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times(&tbuf); |
170 |
greg |
2.36 |
#ifdef _SC_CLK_TCK |
171 |
greg |
2.33 |
period = 1.0 / sysconf(_SC_CLK_TCK); |
172 |
greg |
2.36 |
#else |
173 |
|
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period = 1.0 / 60.0; |
174 |
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#endif |
175 |
greg |
2.33 |
u = ( tbuf.tms_utime + tbuf.tms_cutime ) * period; |
176 |
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s = ( tbuf.tms_stime + tbuf.tms_cstime ) * period; |
177 |
greg |
2.30 |
#endif |
178 |
greg |
1.1 |
|
179 |
greg |
2.30 |
sprintf(errmsg, |
180 |
|
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"%lu rays, %4.2f%% after %.3fu %.3fs %.3fr hours on %s\n", |
181 |
|
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nrays, pctdone, u/3600., s/3600., |
182 |
greg |
2.43 |
(tlastrept-tstart)/3600., myhostname()); |
183 |
greg |
1.24 |
eputs(errmsg); |
184 |
greg |
2.35 |
#ifndef BSD |
185 |
|
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signal(SIGCONT, report); |
186 |
|
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#endif |
187 |
greg |
1.24 |
} |
188 |
greg |
1.1 |
#else |
189 |
greg |
2.52 |
void |
190 |
greg |
1.24 |
report() /* report progress */ |
191 |
|
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{ |
192 |
greg |
2.32 |
tlastrept = time((time_t *)NULL); |
193 |
greg |
2.30 |
sprintf(errmsg, "%lu rays, %4.2f%% after %5.4f hours\n", |
194 |
greg |
1.24 |
nrays, pctdone, (tlastrept-tstart)/3600.0); |
195 |
greg |
1.1 |
eputs(errmsg); |
196 |
|
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} |
197 |
greg |
1.24 |
#endif |
198 |
greg |
1.1 |
|
199 |
|
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|
200 |
greg |
2.52 |
void |
201 |
greg |
2.8 |
rpict(seq, pout, zout, prvr) /* generate image(s) */ |
202 |
|
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int seq; |
203 |
|
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char *pout, *zout, *prvr; |
204 |
|
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/* |
205 |
|
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* If seq is greater than zero, then we will render a sequence of |
206 |
|
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* images based on view parameter strings read from the standard input. |
207 |
|
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* If pout is NULL, then all images will be sent to the standard ouput. |
208 |
|
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* If seq is greater than zero and prvr is an integer, then it is the |
209 |
|
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* frame number at which rendering should begin. Preceeding view parameter |
210 |
|
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* strings will be skipped in the input. |
211 |
|
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* If pout and prvr are the same, prvr is renamed to avoid overwriting. |
212 |
|
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* Note that pout and zout should contain %d format specifications for |
213 |
|
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* sequenced file naming. |
214 |
|
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*/ |
215 |
|
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{ |
216 |
greg |
2.9 |
char fbuf[128], fbuf2[128]; |
217 |
greg |
2.26 |
int npicts; |
218 |
greg |
2.9 |
register char *cp; |
219 |
greg |
2.14 |
RESOLU rs; |
220 |
|
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double pa; |
221 |
greg |
2.8 |
/* check sampling */ |
222 |
|
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if (psample < 1) |
223 |
|
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psample = 1; |
224 |
|
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else if (psample > MAXDIV) { |
225 |
|
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sprintf(errmsg, "pixel sampling reduced from %d to %d", |
226 |
|
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psample, MAXDIV); |
227 |
|
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error(WARNING, errmsg); |
228 |
|
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psample = MAXDIV; |
229 |
|
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} |
230 |
|
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/* get starting frame */ |
231 |
|
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if (seq <= 0) |
232 |
|
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seq = 0; |
233 |
|
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else if (prvr != NULL && isint(prvr)) { |
234 |
greg |
2.9 |
register int rn; /* skip to specified view */ |
235 |
greg |
2.8 |
if ((rn = atoi(prvr)) < seq) |
236 |
|
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error(USER, "recover frame less than start frame"); |
237 |
|
|
if (pout == NULL) |
238 |
|
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error(USER, "missing output file specification"); |
239 |
|
|
for ( ; seq < rn; seq++) |
240 |
|
|
if (nextview(stdin) == EOF) |
241 |
|
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error(USER, "unexpected EOF on view input"); |
242 |
gwlarson |
2.50 |
setview(&ourview); |
243 |
greg |
2.8 |
prvr = fbuf; /* mark for renaming */ |
244 |
|
|
} |
245 |
greg |
2.18 |
if (pout != NULL & prvr != NULL) { |
246 |
greg |
2.8 |
sprintf(fbuf, pout, seq); |
247 |
greg |
2.18 |
if (!strcmp(prvr, fbuf)) { /* rename */ |
248 |
|
|
strcpy(fbuf2, fbuf); |
249 |
|
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for (cp = fbuf2; *cp; cp++) |
250 |
|
|
; |
251 |
|
|
while (cp > fbuf2 && !ISDIRSEP(cp[-1])) |
252 |
|
|
cp--; |
253 |
|
|
strcpy(cp, RFTEMPLATE); |
254 |
greg |
2.8 |
prvr = mktemp(fbuf2); |
255 |
greg |
2.28 |
if (rename(fbuf, prvr) < 0) |
256 |
|
|
if (errno == ENOENT) { /* ghost file */ |
257 |
|
|
sprintf(errmsg, |
258 |
|
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"new output file \"%s\"", |
259 |
|
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fbuf); |
260 |
|
|
error(WARNING, errmsg); |
261 |
|
|
prvr = NULL; |
262 |
|
|
} else { /* serious error */ |
263 |
|
|
sprintf(errmsg, |
264 |
greg |
2.8 |
"cannot rename \"%s\" to \"%s\"", |
265 |
|
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fbuf, prvr); |
266 |
greg |
2.28 |
error(SYSTEM, errmsg); |
267 |
|
|
} |
268 |
greg |
2.8 |
} |
269 |
|
|
} |
270 |
greg |
2.26 |
npicts = 0; /* render sequence */ |
271 |
greg |
2.8 |
do { |
272 |
|
|
if (seq && nextview(stdin) == EOF) |
273 |
|
|
break; |
274 |
greg |
2.25 |
pctdone = 0.0; |
275 |
greg |
2.8 |
if (pout != NULL) { |
276 |
|
|
sprintf(fbuf, pout, seq); |
277 |
greg |
2.27 |
if (file_exists(fbuf)) { |
278 |
|
|
if (prvr != NULL || !strcmp(fbuf, pout)) { |
279 |
|
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sprintf(errmsg, |
280 |
|
|
"output file \"%s\" exists", |
281 |
|
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fbuf); |
282 |
|
|
error(USER, errmsg); |
283 |
|
|
} |
284 |
gwlarson |
2.50 |
setview(&ourview); |
285 |
greg |
2.26 |
continue; /* don't clobber */ |
286 |
greg |
2.27 |
} |
287 |
greg |
2.8 |
if (freopen(fbuf, "w", stdout) == NULL) { |
288 |
|
|
sprintf(errmsg, |
289 |
|
|
"cannot open output file \"%s\"", fbuf); |
290 |
|
|
error(SYSTEM, errmsg); |
291 |
|
|
} |
292 |
greg |
2.17 |
#ifdef MSDOS |
293 |
|
|
setmode(fileno(stdout), O_BINARY); |
294 |
|
|
#endif |
295 |
greg |
2.8 |
dupheader(); |
296 |
|
|
} |
297 |
|
|
hres = hresolu; vres = vresolu; pa = pixaspect; |
298 |
|
|
if (prvr != NULL) |
299 |
|
|
if (viewfile(prvr, &ourview, &rs) <= 0 |
300 |
greg |
2.52 |
|| rs.rt != PIXSTANDARD) { |
301 |
greg |
2.8 |
sprintf(errmsg, |
302 |
|
|
"cannot recover view parameters from \"%s\"", prvr); |
303 |
|
|
error(WARNING, errmsg); |
304 |
|
|
} else { |
305 |
|
|
pa = 0.0; |
306 |
|
|
hres = scanlen(&rs); |
307 |
|
|
vres = numscans(&rs); |
308 |
|
|
} |
309 |
greg |
2.9 |
if ((cp = setview(&ourview)) != NULL) |
310 |
|
|
error(USER, cp); |
311 |
greg |
2.8 |
normaspect(viewaspect(&ourview), &pa, &hres, &vres); |
312 |
|
|
if (seq) { |
313 |
|
|
if (ralrm > 0) { |
314 |
greg |
2.11 |
fprintf(stderr, "FRAME %d:", seq); |
315 |
|
|
fprintview(&ourview, stderr); |
316 |
|
|
putc('\n', stderr); |
317 |
|
|
fflush(stderr); |
318 |
greg |
2.8 |
} |
319 |
|
|
printf("FRAME=%d\n", seq); |
320 |
|
|
} |
321 |
|
|
fputs(VIEWSTR, stdout); |
322 |
|
|
fprintview(&ourview, stdout); |
323 |
|
|
putchar('\n'); |
324 |
|
|
if (pa < .99 || pa > 1.01) |
325 |
|
|
fputaspect(pa, stdout); |
326 |
|
|
fputformat(COLRFMT, stdout); |
327 |
|
|
putchar('\n'); |
328 |
|
|
if (zout != NULL) |
329 |
greg |
2.9 |
sprintf(cp=fbuf, zout, seq); |
330 |
greg |
2.8 |
else |
331 |
greg |
2.9 |
cp = NULL; |
332 |
|
|
render(cp, prvr); |
333 |
greg |
2.8 |
prvr = NULL; |
334 |
greg |
2.26 |
npicts++; |
335 |
greg |
2.8 |
} while (seq++); |
336 |
greg |
2.26 |
/* check that we did something */ |
337 |
|
|
if (npicts == 0) |
338 |
|
|
error(WARNING, "no output produced"); |
339 |
greg |
2.8 |
} |
340 |
|
|
|
341 |
|
|
|
342 |
|
|
nextview(fp) /* get next view from fp */ |
343 |
|
|
FILE *fp; |
344 |
|
|
{ |
345 |
greg |
2.9 |
char linebuf[256]; |
346 |
greg |
2.8 |
|
347 |
gwlarson |
2.49 |
copystruct(&lastview, &ourview); |
348 |
greg |
2.8 |
while (fgets(linebuf, sizeof(linebuf), fp) != NULL) |
349 |
greg |
2.9 |
if (isview(linebuf) && sscanview(&ourview, linebuf) > 0) |
350 |
greg |
2.8 |
return(0); |
351 |
|
|
return(EOF); |
352 |
|
|
} |
353 |
|
|
|
354 |
|
|
|
355 |
greg |
1.11 |
render(zfile, oldfile) /* render the scene */ |
356 |
|
|
char *zfile, *oldfile; |
357 |
greg |
1.1 |
{ |
358 |
|
|
COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
359 |
greg |
1.11 |
float *zbar[MAXDIV+1]; /* z values */ |
360 |
greg |
2.2 |
char *sampdens; /* previous sample density */ |
361 |
greg |
1.1 |
int ypos; /* current scanline */ |
362 |
greg |
1.15 |
int ystep; /* current y step size */ |
363 |
greg |
1.33 |
int hstep; /* h step size */ |
364 |
greg |
1.16 |
int zfd; |
365 |
greg |
1.1 |
COLOR *colptr; |
366 |
greg |
1.11 |
float *zptr; |
367 |
greg |
1.1 |
register int i; |
368 |
greg |
2.52 |
/* 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 |
greg |
1.9 |
/* allocate scanlines */ |
375 |
greg |
1.1 |
for (i = 0; i <= psample; i++) { |
376 |
greg |
2.8 |
scanbar[i] = (COLOR *)malloc(hres*sizeof(COLOR)); |
377 |
greg |
1.1 |
if (scanbar[i] == NULL) |
378 |
greg |
1.11 |
goto memerr; |
379 |
greg |
1.1 |
} |
380 |
greg |
2.2 |
hstep = (psample*140+49)/99; /* quincunx sampling */ |
381 |
|
|
ystep = (psample*99+70)/140; |
382 |
|
|
if (hstep > 2) { |
383 |
greg |
2.8 |
i = hres/hstep + 2; |
384 |
greg |
2.52 |
if ((sampdens = (char *)malloc(i)) == NULL) |
385 |
greg |
2.2 |
goto memerr; |
386 |
|
|
while (i--) |
387 |
|
|
sampdens[i] = hstep; |
388 |
|
|
} else |
389 |
|
|
sampdens = NULL; |
390 |
greg |
2.26 |
/* open z-file */ |
391 |
greg |
1.11 |
if (zfile != NULL) { |
392 |
greg |
1.16 |
if ((zfd = open(zfile, O_WRONLY|O_CREAT, 0666)) == -1) { |
393 |
greg |
2.26 |
sprintf(errmsg, "cannot open z-file \"%s\"", zfile); |
394 |
greg |
1.11 |
error(SYSTEM, errmsg); |
395 |
|
|
} |
396 |
greg |
2.17 |
#ifdef MSDOS |
397 |
|
|
setmode(zfd, O_BINARY); |
398 |
|
|
#endif |
399 |
greg |
1.11 |
for (i = 0; i <= psample; i++) { |
400 |
greg |
2.8 |
zbar[i] = (float *)malloc(hres*sizeof(float)); |
401 |
greg |
1.11 |
if (zbar[i] == NULL) |
402 |
|
|
goto memerr; |
403 |
|
|
} |
404 |
|
|
} else { |
405 |
greg |
1.16 |
zfd = -1; |
406 |
greg |
1.11 |
for (i = 0; i <= psample; i++) |
407 |
|
|
zbar[i] = NULL; |
408 |
|
|
} |
409 |
greg |
1.1 |
/* write out boundaries */ |
410 |
greg |
2.8 |
fprtresolu(hres, vres, stdout); |
411 |
greg |
1.10 |
/* recover file and compute first */ |
412 |
greg |
1.11 |
i = salvage(oldfile); |
413 |
greg |
2.42 |
if (i >= vres) |
414 |
|
|
goto alldone; |
415 |
greg |
1.23 |
if (zfd != -1 && i > 0 && |
416 |
greg |
2.52 |
lseek(zfd, (off_t)i*hres*sizeof(float), 0) < 0) |
417 |
greg |
2.26 |
error(SYSTEM, "z-file seek error in render"); |
418 |
greg |
2.8 |
pctdone = 100.0*i/vres; |
419 |
greg |
1.24 |
if (ralrm > 0) /* report init stats */ |
420 |
|
|
report(); |
421 |
greg |
2.14 |
#ifndef BSD |
422 |
greg |
1.32 |
else |
423 |
|
|
#endif |
424 |
greg |
2.22 |
signal(SIGCONT, report); |
425 |
greg |
2.47 |
ypos = vres-1 - i; /* initialize sampling */ |
426 |
gregl |
2.48 |
if (directvis) |
427 |
|
|
init_drawsources(psample); |
428 |
greg |
2.8 |
fillscanline(scanbar[0], zbar[0], sampdens, hres, ypos, hstep); |
429 |
greg |
1.10 |
/* compute scanlines */ |
430 |
greg |
1.15 |
for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
431 |
|
|
/* bottom adjust? */ |
432 |
|
|
if (ypos < 0) { |
433 |
|
|
ystep += ypos; |
434 |
|
|
ypos = 0; |
435 |
|
|
} |
436 |
|
|
colptr = scanbar[ystep]; /* move base to top */ |
437 |
|
|
scanbar[ystep] = scanbar[0]; |
438 |
greg |
1.1 |
scanbar[0] = colptr; |
439 |
greg |
1.15 |
zptr = zbar[ystep]; |
440 |
|
|
zbar[ystep] = zbar[0]; |
441 |
greg |
1.11 |
zbar[0] = zptr; |
442 |
greg |
1.10 |
/* fill base line */ |
443 |
greg |
2.2 |
fillscanline(scanbar[0], zbar[0], sampdens, |
444 |
greg |
2.8 |
hres, ypos, hstep); |
445 |
greg |
1.10 |
/* fill bar */ |
446 |
greg |
2.8 |
fillscanbar(scanbar, zbar, hres, ypos, ystep); |
447 |
gregl |
2.48 |
if (directvis) /* add bitty sources */ |
448 |
|
|
drawsources(scanbar, zbar, 0, hres, ypos, ystep); |
449 |
greg |
1.10 |
/* write it out */ |
450 |
greg |
2.14 |
#ifndef BSD |
451 |
greg |
2.22 |
signal(SIGCONT, SIG_IGN); /* don't interrupt writes */ |
452 |
greg |
1.32 |
#endif |
453 |
greg |
1.15 |
for (i = ystep; i > 0; i--) { |
454 |
greg |
1.17 |
if (zfd != -1 && write(zfd, (char *)zbar[i], |
455 |
greg |
2.8 |
hres*sizeof(float)) |
456 |
|
|
< hres*sizeof(float)) |
457 |
greg |
1.1 |
goto writerr; |
458 |
greg |
2.8 |
if (fwritescan(scanbar[i], hres, stdout) < 0) |
459 |
greg |
1.11 |
goto writerr; |
460 |
|
|
} |
461 |
greg |
1.1 |
if (fflush(stdout) == EOF) |
462 |
|
|
goto writerr; |
463 |
greg |
1.24 |
/* record progress */ |
464 |
greg |
2.8 |
pctdone = 100.0*(vres-1-ypos)/vres; |
465 |
greg |
2.32 |
if (ralrm > 0 && time((time_t *)NULL) >= tlastrept+ralrm) |
466 |
greg |
1.24 |
report(); |
467 |
greg |
2.14 |
#ifndef BSD |
468 |
greg |
1.32 |
else |
469 |
greg |
2.22 |
signal(SIGCONT, report); |
470 |
greg |
1.32 |
#endif |
471 |
greg |
1.1 |
} |
472 |
greg |
1.11 |
/* clean up */ |
473 |
greg |
2.22 |
signal(SIGCONT, SIG_IGN); |
474 |
greg |
2.42 |
if (zfd != -1 && write(zfd, (char *)zbar[0], hres*sizeof(float)) |
475 |
|
|
< hres*sizeof(float)) |
476 |
|
|
goto writerr; |
477 |
|
|
fwritescan(scanbar[0], hres, stdout); |
478 |
|
|
if (fflush(stdout) == EOF) |
479 |
|
|
goto writerr; |
480 |
|
|
alldone: |
481 |
greg |
1.16 |
if (zfd != -1) { |
482 |
greg |
1.20 |
if (close(zfd) == -1) |
483 |
|
|
goto writerr; |
484 |
greg |
1.11 |
for (i = 0; i <= psample; i++) |
485 |
greg |
2.52 |
free((void *)zbar[i]); |
486 |
greg |
1.11 |
} |
487 |
greg |
1.1 |
for (i = 0; i <= psample; i++) |
488 |
greg |
2.52 |
free((void *)scanbar[i]); |
489 |
greg |
2.2 |
if (sampdens != NULL) |
490 |
|
|
free(sampdens); |
491 |
greg |
1.11 |
pctdone = 100.0; |
492 |
greg |
2.13 |
if (ralrm > 0) |
493 |
|
|
report(); |
494 |
greg |
2.23 |
signal(SIGCONT, SIG_DFL); |
495 |
greg |
1.1 |
return; |
496 |
|
|
writerr: |
497 |
|
|
error(SYSTEM, "write error in render"); |
498 |
greg |
1.11 |
memerr: |
499 |
|
|
error(SYSTEM, "out of memory in render"); |
500 |
greg |
1.1 |
} |
501 |
|
|
|
502 |
|
|
|
503 |
greg |
2.2 |
fillscanline(scanline, zline, sd, xres, y, xstep) /* fill scan at y */ |
504 |
greg |
2.14 |
register COLOR *scanline; |
505 |
|
|
register float *zline; |
506 |
greg |
2.2 |
register char *sd; |
507 |
greg |
1.9 |
int xres, y, xstep; |
508 |
greg |
1.1 |
{ |
509 |
greg |
1.33 |
static int nc = 0; /* number of calls */ |
510 |
greg |
2.2 |
int bl = xstep, b = xstep; |
511 |
greg |
2.14 |
double z; |
512 |
greg |
1.1 |
register int i; |
513 |
greg |
2.45 |
|
514 |
greg |
1.11 |
z = pixvalue(scanline[0], 0, y); |
515 |
|
|
if (zline) zline[0] = z; |
516 |
greg |
1.33 |
/* zig-zag start for quincunx pattern */ |
517 |
greg |
2.2 |
for (i = ++nc & 1 ? xstep : xstep/2; i < xres-1+xstep; i += xstep) { |
518 |
greg |
1.15 |
if (i >= xres) { |
519 |
|
|
xstep += xres-1-i; |
520 |
|
|
i = xres-1; |
521 |
|
|
} |
522 |
greg |
1.11 |
z = pixvalue(scanline[i], i, y); |
523 |
|
|
if (zline) zline[i] = z; |
524 |
greg |
2.2 |
if (sd) b = sd[0] > sd[1] ? sd[0] : sd[1]; |
525 |
greg |
2.3 |
if (i <= xstep) |
526 |
|
|
b = fillsample(scanline, zline, 0, y, i, 0, b/2); |
527 |
|
|
else |
528 |
|
|
b = fillsample(scanline+i-xstep, |
529 |
greg |
2.38 |
zline ? zline+i-xstep : (float *)NULL, |
530 |
greg |
2.3 |
i-xstep, y, xstep, 0, b/2); |
531 |
greg |
2.2 |
if (sd) *sd++ = nc & 1 ? bl : b; |
532 |
|
|
bl = b; |
533 |
greg |
1.1 |
} |
534 |
greg |
2.2 |
if (sd && nc & 1) *sd = bl; |
535 |
greg |
1.1 |
} |
536 |
|
|
|
537 |
|
|
|
538 |
greg |
1.11 |
fillscanbar(scanbar, zbar, xres, y, ysize) /* fill interior */ |
539 |
greg |
2.14 |
register COLOR *scanbar[]; |
540 |
|
|
register float *zbar[]; |
541 |
greg |
1.9 |
int xres, y, ysize; |
542 |
greg |
1.1 |
{ |
543 |
|
|
COLOR vline[MAXDIV+1]; |
544 |
greg |
1.11 |
float zline[MAXDIV+1]; |
545 |
greg |
1.1 |
int b = ysize; |
546 |
|
|
register int i, j; |
547 |
greg |
2.45 |
|
548 |
greg |
1.8 |
for (i = 0; i < xres; i++) { |
549 |
greg |
1.1 |
copycolor(vline[0], scanbar[0][i]); |
550 |
|
|
copycolor(vline[ysize], scanbar[ysize][i]); |
551 |
greg |
1.11 |
if (zbar[0]) { |
552 |
|
|
zline[0] = zbar[0][i]; |
553 |
|
|
zline[ysize] = zbar[ysize][i]; |
554 |
|
|
} |
555 |
greg |
2.38 |
b = fillsample(vline, zbar[0] ? zline : (float *)NULL, |
556 |
greg |
1.11 |
i, y, 0, ysize, b/2); |
557 |
greg |
2.45 |
|
558 |
greg |
1.1 |
for (j = 1; j < ysize; j++) |
559 |
|
|
copycolor(scanbar[j][i], vline[j]); |
560 |
greg |
1.11 |
if (zbar[0]) |
561 |
|
|
for (j = 1; j < ysize; j++) |
562 |
|
|
zbar[j][i] = zline[j]; |
563 |
greg |
1.1 |
} |
564 |
|
|
} |
565 |
|
|
|
566 |
|
|
|
567 |
|
|
int |
568 |
greg |
2.14 |
fillsample(colline, zline, x, y, xlen, ylen, b) /* fill interior points */ |
569 |
|
|
register COLOR *colline; |
570 |
|
|
register float *zline; |
571 |
greg |
1.1 |
int x, y; |
572 |
|
|
int xlen, ylen; |
573 |
|
|
int b; |
574 |
|
|
{ |
575 |
greg |
2.14 |
double ratio; |
576 |
|
|
double z; |
577 |
greg |
1.1 |
COLOR ctmp; |
578 |
|
|
int ncut; |
579 |
|
|
register int len; |
580 |
greg |
2.45 |
|
581 |
greg |
1.1 |
if (xlen > 0) /* x or y length is zero */ |
582 |
|
|
len = xlen; |
583 |
|
|
else |
584 |
|
|
len = ylen; |
585 |
greg |
2.45 |
|
586 |
greg |
1.1 |
if (len <= 1) /* limit recursion */ |
587 |
|
|
return(0); |
588 |
greg |
2.45 |
|
589 |
|
|
if (b > 0 || |
590 |
|
|
(zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
591 |
greg |
1.11 |
|| bigdiff(colline[0], colline[len], maxdiff)) { |
592 |
greg |
2.45 |
|
593 |
greg |
1.11 |
z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
594 |
|
|
if (zline) zline[len>>1] = z; |
595 |
greg |
1.1 |
ncut = 1; |
596 |
|
|
} else { /* interpolate */ |
597 |
|
|
copycolor(colline[len>>1], colline[len]); |
598 |
|
|
ratio = (double)(len>>1) / len; |
599 |
|
|
scalecolor(colline[len>>1], ratio); |
600 |
greg |
1.11 |
if (zline) zline[len>>1] = zline[len] * ratio; |
601 |
|
|
ratio = 1.0 - ratio; |
602 |
greg |
1.1 |
copycolor(ctmp, colline[0]); |
603 |
|
|
scalecolor(ctmp, ratio); |
604 |
|
|
addcolor(colline[len>>1], ctmp); |
605 |
greg |
1.11 |
if (zline) zline[len>>1] += zline[0] * ratio; |
606 |
greg |
1.1 |
ncut = 0; |
607 |
|
|
} |
608 |
|
|
/* recurse */ |
609 |
greg |
1.11 |
ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
610 |
greg |
2.45 |
|
611 |
greg |
2.38 |
ncut += fillsample(colline+(len>>1), |
612 |
|
|
zline ? zline+(len>>1) : (float *)NULL, |
613 |
greg |
1.11 |
x+(xlen>>1), y+(ylen>>1), |
614 |
|
|
xlen-(xlen>>1), ylen-(ylen>>1), b/2); |
615 |
greg |
1.1 |
|
616 |
|
|
return(ncut); |
617 |
|
|
} |
618 |
|
|
|
619 |
|
|
|
620 |
greg |
1.11 |
double |
621 |
greg |
1.1 |
pixvalue(col, x, y) /* compute pixel value */ |
622 |
|
|
COLOR col; /* returned color */ |
623 |
|
|
int x, y; /* pixel position */ |
624 |
|
|
{ |
625 |
gwlarson |
2.49 |
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 |
greg |
1.22 |
setcolor(col, 0.0, 0.0, 0.0); |
634 |
|
|
return(0.0); |
635 |
|
|
} |
636 |
greg |
1.1 |
|
637 |
gwlarson |
2.49 |
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 |
greg |
1.1 |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
655 |
greg |
1.25 |
|
656 |
greg |
1.1 |
rayvalue(&thisray); /* trace ray */ |
657 |
|
|
|
658 |
|
|
copycolor(col, thisray.rcol); /* return color */ |
659 |
greg |
2.45 |
|
660 |
greg |
1.20 |
return(thisray.rt); /* return distance */ |
661 |
greg |
1.1 |
} |
662 |
|
|
|
663 |
|
|
|
664 |
|
|
int |
665 |
|
|
salvage(oldfile) /* salvage scanlines from killed program */ |
666 |
|
|
char *oldfile; |
667 |
|
|
{ |
668 |
|
|
COLR *scanline; |
669 |
|
|
FILE *fp; |
670 |
|
|
int x, y; |
671 |
|
|
|
672 |
|
|
if (oldfile == NULL) |
673 |
greg |
2.37 |
goto gotzip; |
674 |
|
|
|
675 |
greg |
1.9 |
if ((fp = fopen(oldfile, "r")) == NULL) { |
676 |
greg |
1.1 |
sprintf(errmsg, "cannot open recover file \"%s\"", oldfile); |
677 |
|
|
error(WARNING, errmsg); |
678 |
greg |
2.37 |
goto gotzip; |
679 |
greg |
1.1 |
} |
680 |
greg |
2.17 |
#ifdef MSDOS |
681 |
|
|
setmode(fileno(fp), O_BINARY); |
682 |
|
|
#endif |
683 |
greg |
1.1 |
/* discard header */ |
684 |
greg |
2.19 |
getheader(fp, NULL, NULL); |
685 |
greg |
1.1 |
/* get picture size */ |
686 |
greg |
1.36 |
if (!fscnresolu(&x, &y, fp)) { |
687 |
greg |
2.29 |
sprintf(errmsg, "bad recover file \"%s\" - not removed", |
688 |
|
|
oldfile); |
689 |
greg |
1.2 |
error(WARNING, errmsg); |
690 |
greg |
1.1 |
fclose(fp); |
691 |
greg |
2.37 |
goto gotzip; |
692 |
greg |
1.1 |
} |
693 |
|
|
|
694 |
greg |
2.8 |
if (x != hres || y != vres) { |
695 |
greg |
1.1 |
sprintf(errmsg, "resolution mismatch in recover file \"%s\"", |
696 |
|
|
oldfile); |
697 |
|
|
error(USER, errmsg); |
698 |
|
|
} |
699 |
|
|
|
700 |
greg |
2.8 |
scanline = (COLR *)malloc(hres*sizeof(COLR)); |
701 |
greg |
1.1 |
if (scanline == NULL) |
702 |
|
|
error(SYSTEM, "out of memory in salvage"); |
703 |
greg |
2.8 |
for (y = 0; y < vres; y++) { |
704 |
|
|
if (freadcolrs(scanline, hres, fp) < 0) |
705 |
greg |
1.1 |
break; |
706 |
greg |
2.8 |
if (fwritecolrs(scanline, hres, stdout) < 0) |
707 |
greg |
1.1 |
goto writerr; |
708 |
|
|
} |
709 |
|
|
if (fflush(stdout) == EOF) |
710 |
|
|
goto writerr; |
711 |
greg |
2.52 |
free((void *)scanline); |
712 |
greg |
1.1 |
fclose(fp); |
713 |
|
|
unlink(oldfile); |
714 |
|
|
return(y); |
715 |
greg |
2.37 |
gotzip: |
716 |
|
|
if (fflush(stdout) == EOF) |
717 |
|
|
error(SYSTEM, "error writing picture header"); |
718 |
|
|
return(0); |
719 |
greg |
1.1 |
writerr: |
720 |
greg |
2.9 |
sprintf(errmsg, "write error during recovery of \"%s\"", oldfile); |
721 |
|
|
error(SYSTEM, errmsg); |
722 |
greg |
1.31 |
} |
723 |
|
|
|
724 |
|
|
|
725 |
|
|
int |
726 |
|
|
pixnumber(x, y, xres, yres) /* compute pixel index (brushed) */ |
727 |
|
|
register int x, y; |
728 |
|
|
int xres, yres; |
729 |
|
|
{ |
730 |
|
|
x -= y; |
731 |
|
|
while (x < 0) |
732 |
|
|
x += xres; |
733 |
|
|
return((((x>>2)*yres + y) << 2) + (x & 3)); |
734 |
greg |
1.1 |
} |