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#ifndef lint |
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static const char RCSid[] = "$Id$"; |
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#endif |
4 |
/* |
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* rpict.c - routines and variables for picture generation. |
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*/ |
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|
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/* ==================================================================== |
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* The Radiance Software License, Version 1.0 |
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* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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*/ |
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|
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#include "ray.h" |
66 |
|
67 |
#include <sys/types.h> |
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|
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#ifndef NIX |
70 |
#ifdef BSD |
71 |
#include <sys/time.h> |
72 |
#include <sys/resource.h> |
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#else |
74 |
#include <sys/times.h> |
75 |
#include <unistd.h> |
76 |
#endif |
77 |
#endif |
78 |
|
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extern time_t time(); |
80 |
|
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#include <signal.h> |
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|
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#include "view.h" |
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|
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#include "random.h" |
86 |
|
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#include "paths.h" |
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|
89 |
#define RFTEMPLATE "rfXXXXXX" |
90 |
|
91 |
#ifndef SIGCONT |
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#define SIGCONT SIGIO |
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#endif |
94 |
|
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CUBE thescene; /* our scene */ |
96 |
OBJECT nsceneobjs; /* number of objects in our scene */ |
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|
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int dimlist[MAXDIM]; /* sampling dimensions */ |
99 |
int ndims = 0; /* number of sampling dimensions */ |
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int samplendx; /* sample index number */ |
101 |
|
102 |
extern void ambnotify(); |
103 |
void (*addobjnotify[])() = {ambnotify, NULL}; |
104 |
|
105 |
VIEW ourview = STDVIEW; /* view parameters */ |
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int hresolu = 512; /* horizontal resolution */ |
107 |
int vresolu = 512; /* vertical resolution */ |
108 |
double pixaspect = 1.0; /* pixel aspect ratio */ |
109 |
|
110 |
int psample = 4; /* pixel sample size */ |
111 |
double maxdiff = .05; /* max. difference for interpolation */ |
112 |
double dstrpix = 0.67; /* square pixel distribution */ |
113 |
|
114 |
double mblur = 0.; /* motion blur parameter */ |
115 |
|
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void (*trace)() = NULL; /* trace call */ |
117 |
|
118 |
int do_irrad = 0; /* compute irradiance? */ |
119 |
|
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double dstrsrc = 0.0; /* square source distribution */ |
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double shadthresh = .05; /* shadow threshold */ |
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double shadcert = .5; /* shadow certainty */ |
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int directrelay = 1; /* number of source relays */ |
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int vspretest = 512; /* virtual source pretest density */ |
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int directvis = 1; /* sources visible? */ |
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double srcsizerat = .25; /* maximum ratio source size/dist. */ |
127 |
|
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COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
129 |
COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
130 |
double seccg = 0.; /* global scattering eccentricity */ |
131 |
double ssampdist = 0.; /* scatter sampling distance */ |
132 |
|
133 |
double specthresh = .15; /* specular sampling threshold */ |
134 |
double specjitter = 1.; /* specular sampling jitter */ |
135 |
|
136 |
int backvis = 1; /* back face visibility */ |
137 |
|
138 |
int maxdepth = 6; /* maximum recursion depth */ |
139 |
double minweight = 5e-3; /* minimum ray weight */ |
140 |
|
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char *ambfile = NULL; /* ambient file name */ |
142 |
COLOR ambval = BLKCOLOR; /* ambient value */ |
143 |
int ambvwt = 0; /* initial weight for ambient value */ |
144 |
double ambacc = 0.2; /* ambient accuracy */ |
145 |
int ambres = 32; /* ambient resolution */ |
146 |
int ambdiv = 128; /* ambient divisions */ |
147 |
int ambssamp = 0; /* ambient super-samples */ |
148 |
int ambounce = 0; /* ambient bounces */ |
149 |
char *amblist[128]; /* ambient include/exclude list */ |
150 |
int ambincl = -1; /* include == 1, exclude == 0 */ |
151 |
|
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int ralrm = 0; /* seconds between reports */ |
153 |
|
154 |
double pctdone = 0.0; /* percentage done */ |
155 |
time_t tlastrept = 0L; /* time at last report */ |
156 |
time_t tstart; /* starting time */ |
157 |
|
158 |
#define MAXDIV 16 /* maximum sample size */ |
159 |
|
160 |
#define pixjitter() (.5+dstrpix*(.5-frandom())) |
161 |
|
162 |
int hres, vres; /* resolution for this frame */ |
163 |
|
164 |
static VIEW lastview; /* the previous view input */ |
165 |
|
166 |
extern char *mktemp(); |
167 |
|
168 |
void report(); |
169 |
|
170 |
double pixvalue(); |
171 |
|
172 |
#ifdef NIX |
173 |
#define file_exists(f) (access(f,F_OK)==0) |
174 |
#else |
175 |
#include <sys/types.h> |
176 |
#include <sys/stat.h> |
177 |
int |
178 |
file_exists(fname) /* ordinary file exists? */ |
179 |
char *fname; |
180 |
{ |
181 |
struct stat sbuf; |
182 |
if (stat(fname, &sbuf) < 0) return(0); |
183 |
return((sbuf.st_mode & S_IFREG) != 0); |
184 |
} |
185 |
#endif |
186 |
|
187 |
|
188 |
void |
189 |
quit(code) /* quit program */ |
190 |
int code; |
191 |
{ |
192 |
if (code) /* report status */ |
193 |
report(); |
194 |
#ifndef NIX |
195 |
headclean(); /* delete header file */ |
196 |
pfclean(); /* clean up persist files */ |
197 |
#endif |
198 |
exit(code); |
199 |
} |
200 |
|
201 |
|
202 |
#ifndef NIX |
203 |
void |
204 |
report() /* report progress */ |
205 |
{ |
206 |
extern char *myhostname(); |
207 |
double u, s; |
208 |
#ifdef BSD |
209 |
struct rusage rubuf; |
210 |
#else |
211 |
struct tms tbuf; |
212 |
double period; |
213 |
#endif |
214 |
|
215 |
tlastrept = time((time_t *)NULL); |
216 |
#ifdef BSD |
217 |
getrusage(RUSAGE_SELF, &rubuf); |
218 |
u = rubuf.ru_utime.tv_sec + rubuf.ru_utime.tv_usec/1e6; |
219 |
s = rubuf.ru_stime.tv_sec + rubuf.ru_stime.tv_usec/1e6; |
220 |
getrusage(RUSAGE_CHILDREN, &rubuf); |
221 |
u += rubuf.ru_utime.tv_sec + rubuf.ru_utime.tv_usec/1e6; |
222 |
s += rubuf.ru_stime.tv_sec + rubuf.ru_stime.tv_usec/1e6; |
223 |
#else |
224 |
times(&tbuf); |
225 |
#ifdef _SC_CLK_TCK |
226 |
period = 1.0 / sysconf(_SC_CLK_TCK); |
227 |
#else |
228 |
period = 1.0 / 60.0; |
229 |
#endif |
230 |
u = ( tbuf.tms_utime + tbuf.tms_cutime ) * period; |
231 |
s = ( tbuf.tms_stime + tbuf.tms_cstime ) * period; |
232 |
#endif |
233 |
|
234 |
sprintf(errmsg, |
235 |
"%lu rays, %4.2f%% after %.3fu %.3fs %.3fr hours on %s\n", |
236 |
nrays, pctdone, u/3600., s/3600., |
237 |
(tlastrept-tstart)/3600., myhostname()); |
238 |
eputs(errmsg); |
239 |
#ifndef BSD |
240 |
signal(SIGCONT, report); |
241 |
#endif |
242 |
} |
243 |
#else |
244 |
void |
245 |
report() /* report progress */ |
246 |
{ |
247 |
tlastrept = time((time_t *)NULL); |
248 |
sprintf(errmsg, "%lu rays, %4.2f%% after %5.4f hours\n", |
249 |
nrays, pctdone, (tlastrept-tstart)/3600.0); |
250 |
eputs(errmsg); |
251 |
} |
252 |
#endif |
253 |
|
254 |
|
255 |
void |
256 |
rpict(seq, pout, zout, prvr) /* generate image(s) */ |
257 |
int seq; |
258 |
char *pout, *zout, *prvr; |
259 |
/* |
260 |
* If seq is greater than zero, then we will render a sequence of |
261 |
* images based on view parameter strings read from the standard input. |
262 |
* If pout is NULL, then all images will be sent to the standard ouput. |
263 |
* If seq is greater than zero and prvr is an integer, then it is the |
264 |
* frame number at which rendering should begin. Preceeding view parameter |
265 |
* strings will be skipped in the input. |
266 |
* If pout and prvr are the same, prvr is renamed to avoid overwriting. |
267 |
* Note that pout and zout should contain %d format specifications for |
268 |
* sequenced file naming. |
269 |
*/ |
270 |
{ |
271 |
extern char *rindex(), *strncpy(), *strcat(), *strcpy(); |
272 |
char fbuf[128], fbuf2[128]; |
273 |
int npicts; |
274 |
register char *cp; |
275 |
RESOLU rs; |
276 |
double pa; |
277 |
/* check sampling */ |
278 |
if (psample < 1) |
279 |
psample = 1; |
280 |
else if (psample > MAXDIV) { |
281 |
sprintf(errmsg, "pixel sampling reduced from %d to %d", |
282 |
psample, MAXDIV); |
283 |
error(WARNING, errmsg); |
284 |
psample = MAXDIV; |
285 |
} |
286 |
/* get starting frame */ |
287 |
if (seq <= 0) |
288 |
seq = 0; |
289 |
else if (prvr != NULL && isint(prvr)) { |
290 |
register int rn; /* skip to specified view */ |
291 |
if ((rn = atoi(prvr)) < seq) |
292 |
error(USER, "recover frame less than start frame"); |
293 |
if (pout == NULL) |
294 |
error(USER, "missing output file specification"); |
295 |
for ( ; seq < rn; seq++) |
296 |
if (nextview(stdin) == EOF) |
297 |
error(USER, "unexpected EOF on view input"); |
298 |
setview(&ourview); |
299 |
prvr = fbuf; /* mark for renaming */ |
300 |
} |
301 |
if (pout != NULL & prvr != NULL) { |
302 |
sprintf(fbuf, pout, seq); |
303 |
if (!strcmp(prvr, fbuf)) { /* rename */ |
304 |
strcpy(fbuf2, fbuf); |
305 |
for (cp = fbuf2; *cp; cp++) |
306 |
; |
307 |
while (cp > fbuf2 && !ISDIRSEP(cp[-1])) |
308 |
cp--; |
309 |
strcpy(cp, RFTEMPLATE); |
310 |
prvr = mktemp(fbuf2); |
311 |
if (rename(fbuf, prvr) < 0) |
312 |
if (errno == ENOENT) { /* ghost file */ |
313 |
sprintf(errmsg, |
314 |
"new output file \"%s\"", |
315 |
fbuf); |
316 |
error(WARNING, errmsg); |
317 |
prvr = NULL; |
318 |
} else { /* serious error */ |
319 |
sprintf(errmsg, |
320 |
"cannot rename \"%s\" to \"%s\"", |
321 |
fbuf, prvr); |
322 |
error(SYSTEM, errmsg); |
323 |
} |
324 |
} |
325 |
} |
326 |
npicts = 0; /* render sequence */ |
327 |
do { |
328 |
if (seq && nextview(stdin) == EOF) |
329 |
break; |
330 |
pctdone = 0.0; |
331 |
if (pout != NULL) { |
332 |
sprintf(fbuf, pout, seq); |
333 |
if (file_exists(fbuf)) { |
334 |
if (prvr != NULL || !strcmp(fbuf, pout)) { |
335 |
sprintf(errmsg, |
336 |
"output file \"%s\" exists", |
337 |
fbuf); |
338 |
error(USER, errmsg); |
339 |
} |
340 |
setview(&ourview); |
341 |
continue; /* don't clobber */ |
342 |
} |
343 |
if (freopen(fbuf, "w", stdout) == NULL) { |
344 |
sprintf(errmsg, |
345 |
"cannot open output file \"%s\"", fbuf); |
346 |
error(SYSTEM, errmsg); |
347 |
} |
348 |
#ifdef MSDOS |
349 |
setmode(fileno(stdout), O_BINARY); |
350 |
#endif |
351 |
dupheader(); |
352 |
} |
353 |
hres = hresolu; vres = vresolu; pa = pixaspect; |
354 |
if (prvr != NULL) |
355 |
if (viewfile(prvr, &ourview, &rs) <= 0 |
356 |
|| rs.rt != PIXSTANDARD) { |
357 |
sprintf(errmsg, |
358 |
"cannot recover view parameters from \"%s\"", prvr); |
359 |
error(WARNING, errmsg); |
360 |
} else { |
361 |
pa = 0.0; |
362 |
hres = scanlen(&rs); |
363 |
vres = numscans(&rs); |
364 |
} |
365 |
if ((cp = setview(&ourview)) != NULL) |
366 |
error(USER, cp); |
367 |
normaspect(viewaspect(&ourview), &pa, &hres, &vres); |
368 |
if (seq) { |
369 |
if (ralrm > 0) { |
370 |
fprintf(stderr, "FRAME %d:", seq); |
371 |
fprintview(&ourview, stderr); |
372 |
putc('\n', stderr); |
373 |
fflush(stderr); |
374 |
} |
375 |
printf("FRAME=%d\n", seq); |
376 |
} |
377 |
fputs(VIEWSTR, stdout); |
378 |
fprintview(&ourview, stdout); |
379 |
putchar('\n'); |
380 |
if (pa < .99 || pa > 1.01) |
381 |
fputaspect(pa, stdout); |
382 |
fputformat(COLRFMT, stdout); |
383 |
putchar('\n'); |
384 |
if (zout != NULL) |
385 |
sprintf(cp=fbuf, zout, seq); |
386 |
else |
387 |
cp = NULL; |
388 |
render(cp, prvr); |
389 |
prvr = NULL; |
390 |
npicts++; |
391 |
} while (seq++); |
392 |
/* check that we did something */ |
393 |
if (npicts == 0) |
394 |
error(WARNING, "no output produced"); |
395 |
} |
396 |
|
397 |
|
398 |
nextview(fp) /* get next view from fp */ |
399 |
FILE *fp; |
400 |
{ |
401 |
char linebuf[256]; |
402 |
|
403 |
copystruct(&lastview, &ourview); |
404 |
while (fgets(linebuf, sizeof(linebuf), fp) != NULL) |
405 |
if (isview(linebuf) && sscanview(&ourview, linebuf) > 0) |
406 |
return(0); |
407 |
return(EOF); |
408 |
} |
409 |
|
410 |
|
411 |
render(zfile, oldfile) /* render the scene */ |
412 |
char *zfile, *oldfile; |
413 |
{ |
414 |
COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
415 |
float *zbar[MAXDIV+1]; /* z values */ |
416 |
char *sampdens; /* previous sample density */ |
417 |
int ypos; /* current scanline */ |
418 |
int ystep; /* current y step size */ |
419 |
int hstep; /* h step size */ |
420 |
int zfd; |
421 |
COLOR *colptr; |
422 |
float *zptr; |
423 |
register int i; |
424 |
/* check for empty image */ |
425 |
if (hres <= 0 || vres <= 0) { |
426 |
error(WARNING, "empty output picture"); |
427 |
fprtresolu(0, 0, stdout); |
428 |
return; |
429 |
} |
430 |
/* allocate scanlines */ |
431 |
for (i = 0; i <= psample; i++) { |
432 |
scanbar[i] = (COLOR *)malloc(hres*sizeof(COLOR)); |
433 |
if (scanbar[i] == NULL) |
434 |
goto memerr; |
435 |
} |
436 |
hstep = (psample*140+49)/99; /* quincunx sampling */ |
437 |
ystep = (psample*99+70)/140; |
438 |
if (hstep > 2) { |
439 |
i = hres/hstep + 2; |
440 |
if ((sampdens = (char *)malloc(i)) == NULL) |
441 |
goto memerr; |
442 |
while (i--) |
443 |
sampdens[i] = hstep; |
444 |
} else |
445 |
sampdens = NULL; |
446 |
/* open z-file */ |
447 |
if (zfile != NULL) { |
448 |
if ((zfd = open(zfile, O_WRONLY|O_CREAT, 0666)) == -1) { |
449 |
sprintf(errmsg, "cannot open z-file \"%s\"", zfile); |
450 |
error(SYSTEM, errmsg); |
451 |
} |
452 |
#ifdef MSDOS |
453 |
setmode(zfd, O_BINARY); |
454 |
#endif |
455 |
for (i = 0; i <= psample; i++) { |
456 |
zbar[i] = (float *)malloc(hres*sizeof(float)); |
457 |
if (zbar[i] == NULL) |
458 |
goto memerr; |
459 |
} |
460 |
} else { |
461 |
zfd = -1; |
462 |
for (i = 0; i <= psample; i++) |
463 |
zbar[i] = NULL; |
464 |
} |
465 |
/* write out boundaries */ |
466 |
fprtresolu(hres, vres, stdout); |
467 |
/* recover file and compute first */ |
468 |
i = salvage(oldfile); |
469 |
if (i >= vres) |
470 |
goto alldone; |
471 |
if (zfd != -1 && i > 0 && |
472 |
lseek(zfd, (off_t)i*hres*sizeof(float), 0) < 0) |
473 |
error(SYSTEM, "z-file seek error in render"); |
474 |
pctdone = 100.0*i/vres; |
475 |
if (ralrm > 0) /* report init stats */ |
476 |
report(); |
477 |
#ifndef BSD |
478 |
else |
479 |
#endif |
480 |
signal(SIGCONT, report); |
481 |
ypos = vres-1 - i; /* initialize sampling */ |
482 |
if (directvis) |
483 |
init_drawsources(psample); |
484 |
fillscanline(scanbar[0], zbar[0], sampdens, hres, ypos, hstep); |
485 |
/* compute scanlines */ |
486 |
for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
487 |
/* bottom adjust? */ |
488 |
if (ypos < 0) { |
489 |
ystep += ypos; |
490 |
ypos = 0; |
491 |
} |
492 |
colptr = scanbar[ystep]; /* move base to top */ |
493 |
scanbar[ystep] = scanbar[0]; |
494 |
scanbar[0] = colptr; |
495 |
zptr = zbar[ystep]; |
496 |
zbar[ystep] = zbar[0]; |
497 |
zbar[0] = zptr; |
498 |
/* fill base line */ |
499 |
fillscanline(scanbar[0], zbar[0], sampdens, |
500 |
hres, ypos, hstep); |
501 |
/* fill bar */ |
502 |
fillscanbar(scanbar, zbar, hres, ypos, ystep); |
503 |
if (directvis) /* add bitty sources */ |
504 |
drawsources(scanbar, zbar, 0, hres, ypos, ystep); |
505 |
/* write it out */ |
506 |
#ifndef BSD |
507 |
signal(SIGCONT, SIG_IGN); /* don't interrupt writes */ |
508 |
#endif |
509 |
for (i = ystep; i > 0; i--) { |
510 |
if (zfd != -1 && write(zfd, (char *)zbar[i], |
511 |
hres*sizeof(float)) |
512 |
< hres*sizeof(float)) |
513 |
goto writerr; |
514 |
if (fwritescan(scanbar[i], hres, stdout) < 0) |
515 |
goto writerr; |
516 |
} |
517 |
if (fflush(stdout) == EOF) |
518 |
goto writerr; |
519 |
/* record progress */ |
520 |
pctdone = 100.0*(vres-1-ypos)/vres; |
521 |
if (ralrm > 0 && time((time_t *)NULL) >= tlastrept+ralrm) |
522 |
report(); |
523 |
#ifndef BSD |
524 |
else |
525 |
signal(SIGCONT, report); |
526 |
#endif |
527 |
} |
528 |
/* clean up */ |
529 |
signal(SIGCONT, SIG_IGN); |
530 |
if (zfd != -1 && write(zfd, (char *)zbar[0], hres*sizeof(float)) |
531 |
< hres*sizeof(float)) |
532 |
goto writerr; |
533 |
fwritescan(scanbar[0], hres, stdout); |
534 |
if (fflush(stdout) == EOF) |
535 |
goto writerr; |
536 |
alldone: |
537 |
if (zfd != -1) { |
538 |
if (close(zfd) == -1) |
539 |
goto writerr; |
540 |
for (i = 0; i <= psample; i++) |
541 |
free((void *)zbar[i]); |
542 |
} |
543 |
for (i = 0; i <= psample; i++) |
544 |
free((void *)scanbar[i]); |
545 |
if (sampdens != NULL) |
546 |
free(sampdens); |
547 |
pctdone = 100.0; |
548 |
if (ralrm > 0) |
549 |
report(); |
550 |
signal(SIGCONT, SIG_DFL); |
551 |
return; |
552 |
writerr: |
553 |
error(SYSTEM, "write error in render"); |
554 |
memerr: |
555 |
error(SYSTEM, "out of memory in render"); |
556 |
} |
557 |
|
558 |
|
559 |
fillscanline(scanline, zline, sd, xres, y, xstep) /* fill scan at y */ |
560 |
register COLOR *scanline; |
561 |
register float *zline; |
562 |
register char *sd; |
563 |
int xres, y, xstep; |
564 |
{ |
565 |
static int nc = 0; /* number of calls */ |
566 |
int bl = xstep, b = xstep; |
567 |
double z; |
568 |
register int i; |
569 |
|
570 |
z = pixvalue(scanline[0], 0, y); |
571 |
if (zline) zline[0] = z; |
572 |
/* zig-zag start for quincunx pattern */ |
573 |
for (i = ++nc & 1 ? xstep : xstep/2; i < xres-1+xstep; i += xstep) { |
574 |
if (i >= xres) { |
575 |
xstep += xres-1-i; |
576 |
i = xres-1; |
577 |
} |
578 |
z = pixvalue(scanline[i], i, y); |
579 |
if (zline) zline[i] = z; |
580 |
if (sd) b = sd[0] > sd[1] ? sd[0] : sd[1]; |
581 |
if (i <= xstep) |
582 |
b = fillsample(scanline, zline, 0, y, i, 0, b/2); |
583 |
else |
584 |
b = fillsample(scanline+i-xstep, |
585 |
zline ? zline+i-xstep : (float *)NULL, |
586 |
i-xstep, y, xstep, 0, b/2); |
587 |
if (sd) *sd++ = nc & 1 ? bl : b; |
588 |
bl = b; |
589 |
} |
590 |
if (sd && nc & 1) *sd = bl; |
591 |
} |
592 |
|
593 |
|
594 |
fillscanbar(scanbar, zbar, xres, y, ysize) /* fill interior */ |
595 |
register COLOR *scanbar[]; |
596 |
register float *zbar[]; |
597 |
int xres, y, ysize; |
598 |
{ |
599 |
COLOR vline[MAXDIV+1]; |
600 |
float zline[MAXDIV+1]; |
601 |
int b = ysize; |
602 |
register int i, j; |
603 |
|
604 |
for (i = 0; i < xres; i++) { |
605 |
copycolor(vline[0], scanbar[0][i]); |
606 |
copycolor(vline[ysize], scanbar[ysize][i]); |
607 |
if (zbar[0]) { |
608 |
zline[0] = zbar[0][i]; |
609 |
zline[ysize] = zbar[ysize][i]; |
610 |
} |
611 |
b = fillsample(vline, zbar[0] ? zline : (float *)NULL, |
612 |
i, y, 0, ysize, b/2); |
613 |
|
614 |
for (j = 1; j < ysize; j++) |
615 |
copycolor(scanbar[j][i], vline[j]); |
616 |
if (zbar[0]) |
617 |
for (j = 1; j < ysize; j++) |
618 |
zbar[j][i] = zline[j]; |
619 |
} |
620 |
} |
621 |
|
622 |
|
623 |
int |
624 |
fillsample(colline, zline, x, y, xlen, ylen, b) /* fill interior points */ |
625 |
register COLOR *colline; |
626 |
register float *zline; |
627 |
int x, y; |
628 |
int xlen, ylen; |
629 |
int b; |
630 |
{ |
631 |
double ratio; |
632 |
double z; |
633 |
COLOR ctmp; |
634 |
int ncut; |
635 |
register int len; |
636 |
|
637 |
if (xlen > 0) /* x or y length is zero */ |
638 |
len = xlen; |
639 |
else |
640 |
len = ylen; |
641 |
|
642 |
if (len <= 1) /* limit recursion */ |
643 |
return(0); |
644 |
|
645 |
if (b > 0 || |
646 |
(zline && 2.*fabs(zline[0]-zline[len]) > maxdiff*(zline[0]+zline[len])) |
647 |
|| bigdiff(colline[0], colline[len], maxdiff)) { |
648 |
|
649 |
z = pixvalue(colline[len>>1], x + (xlen>>1), y + (ylen>>1)); |
650 |
if (zline) zline[len>>1] = z; |
651 |
ncut = 1; |
652 |
} else { /* interpolate */ |
653 |
copycolor(colline[len>>1], colline[len]); |
654 |
ratio = (double)(len>>1) / len; |
655 |
scalecolor(colline[len>>1], ratio); |
656 |
if (zline) zline[len>>1] = zline[len] * ratio; |
657 |
ratio = 1.0 - ratio; |
658 |
copycolor(ctmp, colline[0]); |
659 |
scalecolor(ctmp, ratio); |
660 |
addcolor(colline[len>>1], ctmp); |
661 |
if (zline) zline[len>>1] += zline[0] * ratio; |
662 |
ncut = 0; |
663 |
} |
664 |
/* recurse */ |
665 |
ncut += fillsample(colline, zline, x, y, xlen>>1, ylen>>1, (b-1)/2); |
666 |
|
667 |
ncut += fillsample(colline+(len>>1), |
668 |
zline ? zline+(len>>1) : (float *)NULL, |
669 |
x+(xlen>>1), y+(ylen>>1), |
670 |
xlen-(xlen>>1), ylen-(ylen>>1), b/2); |
671 |
|
672 |
return(ncut); |
673 |
} |
674 |
|
675 |
|
676 |
double |
677 |
pixvalue(col, x, y) /* compute pixel value */ |
678 |
COLOR col; /* returned color */ |
679 |
int x, y; /* pixel position */ |
680 |
{ |
681 |
RAY thisray; |
682 |
FVECT lorg, ldir; |
683 |
double hpos, vpos, lmax, d; |
684 |
/* compute view ray */ |
685 |
hpos = (x+pixjitter())/hres; |
686 |
vpos = (y+pixjitter())/vres; |
687 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
688 |
&ourview, hpos, vpos)) < -FTINY) { |
689 |
setcolor(col, 0.0, 0.0, 0.0); |
690 |
return(0.0); |
691 |
} |
692 |
|
693 |
samplendx = pixnumber(x,y,hres,vres); /* set pixel index */ |
694 |
|
695 |
/* optional motion blur */ |
696 |
if (lastview.type && mblur > FTINY && (lmax = viewray(lorg, ldir, |
697 |
&lastview, hpos, vpos)) >= -FTINY) { |
698 |
register int i; |
699 |
register double d = mblur*(.5-urand(281+samplendx)); |
700 |
|
701 |
thisray.rmax = (1.-d)*thisray.rmax + d*lmax; |
702 |
for (i = 3; i--; ) { |
703 |
thisray.rorg[i] = (1.-d)*thisray.rorg[i] + d*lorg[i]; |
704 |
thisray.rdir[i] = (1.-d)*thisray.rdir[i] + d*ldir[i]; |
705 |
} |
706 |
if (normalize(thisray.rdir) == 0.0) |
707 |
return(0.0); |
708 |
} |
709 |
|
710 |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
711 |
|
712 |
rayvalue(&thisray); /* trace ray */ |
713 |
|
714 |
copycolor(col, thisray.rcol); /* return color */ |
715 |
|
716 |
return(thisray.rt); /* return distance */ |
717 |
} |
718 |
|
719 |
|
720 |
int |
721 |
salvage(oldfile) /* salvage scanlines from killed program */ |
722 |
char *oldfile; |
723 |
{ |
724 |
COLR *scanline; |
725 |
FILE *fp; |
726 |
int x, y; |
727 |
|
728 |
if (oldfile == NULL) |
729 |
goto gotzip; |
730 |
|
731 |
if ((fp = fopen(oldfile, "r")) == NULL) { |
732 |
sprintf(errmsg, "cannot open recover file \"%s\"", oldfile); |
733 |
error(WARNING, errmsg); |
734 |
goto gotzip; |
735 |
} |
736 |
#ifdef MSDOS |
737 |
setmode(fileno(fp), O_BINARY); |
738 |
#endif |
739 |
/* discard header */ |
740 |
getheader(fp, NULL, NULL); |
741 |
/* get picture size */ |
742 |
if (!fscnresolu(&x, &y, fp)) { |
743 |
sprintf(errmsg, "bad recover file \"%s\" - not removed", |
744 |
oldfile); |
745 |
error(WARNING, errmsg); |
746 |
fclose(fp); |
747 |
goto gotzip; |
748 |
} |
749 |
|
750 |
if (x != hres || y != vres) { |
751 |
sprintf(errmsg, "resolution mismatch in recover file \"%s\"", |
752 |
oldfile); |
753 |
error(USER, errmsg); |
754 |
} |
755 |
|
756 |
scanline = (COLR *)malloc(hres*sizeof(COLR)); |
757 |
if (scanline == NULL) |
758 |
error(SYSTEM, "out of memory in salvage"); |
759 |
for (y = 0; y < vres; y++) { |
760 |
if (freadcolrs(scanline, hres, fp) < 0) |
761 |
break; |
762 |
if (fwritecolrs(scanline, hres, stdout) < 0) |
763 |
goto writerr; |
764 |
} |
765 |
if (fflush(stdout) == EOF) |
766 |
goto writerr; |
767 |
free((void *)scanline); |
768 |
fclose(fp); |
769 |
unlink(oldfile); |
770 |
return(y); |
771 |
gotzip: |
772 |
if (fflush(stdout) == EOF) |
773 |
error(SYSTEM, "error writing picture header"); |
774 |
return(0); |
775 |
writerr: |
776 |
sprintf(errmsg, "write error during recovery of \"%s\"", oldfile); |
777 |
error(SYSTEM, errmsg); |
778 |
} |
779 |
|
780 |
|
781 |
int |
782 |
pixnumber(x, y, xres, yres) /* compute pixel index (brushed) */ |
783 |
register int x, y; |
784 |
int xres, yres; |
785 |
{ |
786 |
x -= y; |
787 |
while (x < 0) |
788 |
x += xres; |
789 |
return((((x>>2)*yres + y) << 2) + (x & 3)); |
790 |
} |