1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id$"; |
3 |
#endif |
4 |
/* |
5 |
* rview.c - routines and variables for interactive view generation. |
6 |
* |
7 |
* External symbols declared in rpaint.h |
8 |
*/ |
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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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|
67 |
#include "ray.h" |
68 |
|
69 |
#include "rpaint.h" |
70 |
|
71 |
#include <signal.h> |
72 |
|
73 |
#include <ctype.h> |
74 |
|
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CUBE thescene; /* our scene */ |
76 |
OBJECT nsceneobjs; /* number of objects in our scene */ |
77 |
|
78 |
int dimlist[MAXDIM]; /* sampling dimensions */ |
79 |
int ndims = 0; /* number of sampling dimensions */ |
80 |
int samplendx = 0; /* index for this sample */ |
81 |
|
82 |
extern void ambnotify(); |
83 |
void (*addobjnotify[])() = {ambnotify, NULL}; |
84 |
|
85 |
VIEW ourview = STDVIEW; /* viewing parameters */ |
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int hresolu, vresolu; /* image resolution */ |
87 |
|
88 |
void (*trace)() = NULL; /* trace call */ |
89 |
|
90 |
int do_irrad = 0; /* compute irradiance? */ |
91 |
|
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int psample = 8; /* pixel sample size */ |
93 |
double maxdiff = .15; /* max. sample difference */ |
94 |
|
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double exposure = 1.0; /* exposure for scene */ |
96 |
|
97 |
double dstrsrc = 0.0; /* square source distribution */ |
98 |
double shadthresh = .1; /* shadow threshold */ |
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double shadcert = .25; /* shadow certainty */ |
100 |
int directrelay = 0; /* number of source relays */ |
101 |
int vspretest = 128; /* virtual source pretest density */ |
102 |
int directvis = 1; /* sources visible? */ |
103 |
double srcsizerat = 0.; /* maximum ratio source size/dist. */ |
104 |
|
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COLOR cextinction = BLKCOLOR; /* global extinction coefficient */ |
106 |
COLOR salbedo = BLKCOLOR; /* global scattering albedo */ |
107 |
double seccg = 0.; /* global scattering eccentricity */ |
108 |
double ssampdist = 0.; /* scatter sampling distance */ |
109 |
|
110 |
double specthresh = .3; /* specular sampling threshold */ |
111 |
double specjitter = 1.; /* specular sampling jitter */ |
112 |
|
113 |
int backvis = 1; /* back face visibility */ |
114 |
|
115 |
int maxdepth = 4; /* maximum recursion depth */ |
116 |
double minweight = 1e-2; /* minimum ray weight */ |
117 |
|
118 |
char *ambfile = NULL; /* ambient file name */ |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
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int ambvwt = 0; /* initial weight for ambient value */ |
121 |
double ambacc = 0.2; /* ambient accuracy */ |
122 |
int ambres = 8; /* ambient resolution */ |
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int ambdiv = 32; /* ambient divisions */ |
124 |
int ambssamp = 0; /* ambient super-samples */ |
125 |
int ambounce = 0; /* ambient bounces */ |
126 |
char *amblist[128]; /* ambient include/exclude list */ |
127 |
int ambincl = -1; /* include == 1, exclude == 0 */ |
128 |
|
129 |
int greyscale = 0; /* map colors to brightness? */ |
130 |
char *dvcname = dev_default; /* output device name */ |
131 |
|
132 |
struct driver *dev = NULL; /* driver functions */ |
133 |
|
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char rifname[128]; /* rad input file name */ |
135 |
|
136 |
VIEW oldview; /* previous view parameters */ |
137 |
|
138 |
PNODE ptrunk; /* the base of our image */ |
139 |
RECT pframe; /* current frame boundaries */ |
140 |
int pdepth; /* image depth in current frame */ |
141 |
|
142 |
static char *reserve_mem = NULL; /* pre-allocated reserve memory */ |
143 |
|
144 |
#define RESERVE_AMT 32768 /* amount of memory to reserve */ |
145 |
|
146 |
#define CTRL(c) ((c)-'@') |
147 |
|
148 |
|
149 |
void |
150 |
quit(code) /* quit program */ |
151 |
int code; |
152 |
{ |
153 |
#ifdef MSTATS |
154 |
if (code == 2 && errno == ENOMEM) |
155 |
printmemstats(stderr); |
156 |
#endif |
157 |
devclose(); |
158 |
exit(code); |
159 |
} |
160 |
|
161 |
|
162 |
void |
163 |
devopen(dname) /* open device driver */ |
164 |
char *dname; |
165 |
{ |
166 |
extern char *progname, *octname; |
167 |
char *id; |
168 |
register int i; |
169 |
|
170 |
id = octname!=NULL ? octname : progname; |
171 |
/* check device table */ |
172 |
for (i = 0; devtable[i].name; i++) |
173 |
if (!strcmp(dname, devtable[i].name)) |
174 |
if ((dev = (*devtable[i].init)(dname, id)) == NULL) { |
175 |
sprintf(errmsg, "cannot initialize %s", dname); |
176 |
error(USER, errmsg); |
177 |
} else |
178 |
return; |
179 |
#ifndef NIX |
180 |
/* not there, try exec */ |
181 |
if ((dev = comm_init(dname, id)) == NULL) { |
182 |
sprintf(errmsg, "cannot start device \"%s\"", dname); |
183 |
error(USER, errmsg); |
184 |
} |
185 |
#endif |
186 |
} |
187 |
|
188 |
|
189 |
void |
190 |
devclose() /* close our device */ |
191 |
{ |
192 |
if (dev != NULL) |
193 |
(*dev->close)(); |
194 |
dev = NULL; |
195 |
} |
196 |
|
197 |
|
198 |
void |
199 |
printdevices() /* print list of output devices */ |
200 |
{ |
201 |
register int i; |
202 |
|
203 |
for (i = 0; devtable[i].name; i++) |
204 |
printf("%-16s # %s\n", devtable[i].name, devtable[i].descrip); |
205 |
} |
206 |
|
207 |
|
208 |
void |
209 |
rview() /* do a view */ |
210 |
{ |
211 |
char buf[32]; |
212 |
|
213 |
devopen(dvcname); /* open device */ |
214 |
newimage(); /* start image (calls fillreserves) */ |
215 |
|
216 |
for ( ; ; ) { /* quit in command() */ |
217 |
while (hresolu <= 1<<pdepth && vresolu <= 1<<pdepth) |
218 |
command("done: "); |
219 |
while (reserve_mem == NULL) |
220 |
command("out of memory: "); |
221 |
errno = 0; |
222 |
if (hresolu <= psample<<pdepth && vresolu <= psample<<pdepth) { |
223 |
sprintf(buf, "%d sampling...\n", 1<<pdepth); |
224 |
(*dev->comout)(buf); |
225 |
rsample(); |
226 |
} else { |
227 |
sprintf(buf, "%d refining...\n", 1<<pdepth); |
228 |
(*dev->comout)(buf); |
229 |
refine(&ptrunk, 0, 0, hresolu, vresolu, pdepth+1); |
230 |
} |
231 |
if (errno == ENOMEM) /* ran out of memory */ |
232 |
freereserves(); |
233 |
else if (dev->inpready) /* noticed some input */ |
234 |
command(": "); |
235 |
else /* finished this depth */ |
236 |
pdepth++; |
237 |
} |
238 |
} |
239 |
|
240 |
|
241 |
void |
242 |
fillreserves() /* fill memory reserves */ |
243 |
{ |
244 |
if (reserve_mem != NULL) |
245 |
return; |
246 |
reserve_mem = (char *)malloc(RESERVE_AMT); |
247 |
} |
248 |
|
249 |
|
250 |
void |
251 |
freereserves() /* free memory reserves */ |
252 |
{ |
253 |
if (reserve_mem == NULL) |
254 |
return; |
255 |
free(reserve_mem); |
256 |
reserve_mem = NULL; |
257 |
} |
258 |
|
259 |
|
260 |
void |
261 |
command(prompt) /* get/execute command */ |
262 |
char *prompt; |
263 |
{ |
264 |
#define badcom(s) strncmp(s, inpbuf, args-inpbuf-1) |
265 |
char inpbuf[256]; |
266 |
char *args; |
267 |
again: |
268 |
(*dev->comin)(inpbuf, prompt); /* get command + arguments */ |
269 |
for (args = inpbuf; *args && *args != ' '; args++) |
270 |
; |
271 |
if (*args) *args++ = '\0'; |
272 |
else *++args = '\0'; |
273 |
|
274 |
switch (inpbuf[0]) { |
275 |
case 'f': /* new frame (or free mem.) */ |
276 |
if (badcom("frame")) { |
277 |
if (badcom("free")) |
278 |
goto commerr; |
279 |
free_objmem(); |
280 |
break; |
281 |
} |
282 |
getframe(args); |
283 |
break; |
284 |
case 'v': /* view */ |
285 |
if (badcom("view")) |
286 |
goto commerr; |
287 |
getview(args); |
288 |
break; |
289 |
case 'l': /* last view */ |
290 |
if (badcom("last")) |
291 |
goto commerr; |
292 |
lastview(args); |
293 |
break; |
294 |
case 'V': /* save view */ |
295 |
if (badcom("V")) |
296 |
goto commerr; |
297 |
saveview(args); |
298 |
break; |
299 |
case 'L': /* load view */ |
300 |
if (badcom("L")) |
301 |
goto commerr; |
302 |
loadview(args); |
303 |
break; |
304 |
case 'e': /* exposure */ |
305 |
if (badcom("exposure")) |
306 |
goto commerr; |
307 |
getexposure(args); |
308 |
break; |
309 |
case 's': /* set a parameter */ |
310 |
if (badcom("set")) { |
311 |
#ifdef SIGTSTP |
312 |
if (!badcom("stop")) |
313 |
goto dostop; |
314 |
#endif |
315 |
goto commerr; |
316 |
} |
317 |
setparam(args); |
318 |
break; |
319 |
case 'n': /* new picture */ |
320 |
if (badcom("new")) |
321 |
goto commerr; |
322 |
newimage(); |
323 |
break; |
324 |
case 't': /* trace a ray */ |
325 |
if (badcom("trace")) |
326 |
goto commerr; |
327 |
traceray(args); |
328 |
break; |
329 |
case 'a': /* aim camera */ |
330 |
if (badcom("aim")) |
331 |
goto commerr; |
332 |
getaim(args); |
333 |
break; |
334 |
case 'm': /* move camera (or memstats) */ |
335 |
if (badcom("move")) |
336 |
#ifdef MSTATS |
337 |
{ |
338 |
if (badcom("memory")) |
339 |
goto commerr; |
340 |
printmemstats(stderr); |
341 |
break; |
342 |
} |
343 |
#else |
344 |
goto commerr; |
345 |
#endif |
346 |
getmove(args); |
347 |
break; |
348 |
case 'r': /* rotate/repaint */ |
349 |
if (badcom("rotate")) { |
350 |
if (badcom("repaint")) { |
351 |
if (badcom("redraw")) |
352 |
goto commerr; |
353 |
redraw(); |
354 |
break; |
355 |
} |
356 |
getrepaint(args); |
357 |
break; |
358 |
} |
359 |
getrotate(args); |
360 |
break; |
361 |
case 'p': /* pivot view */ |
362 |
if (badcom("pivot")) { |
363 |
if (badcom("pause")) |
364 |
goto commerr; |
365 |
goto again; |
366 |
} |
367 |
getpivot(args); |
368 |
break; |
369 |
case CTRL('R'): /* redraw */ |
370 |
redraw(); |
371 |
break; |
372 |
case 'w': /* write */ |
373 |
if (badcom("write")) |
374 |
goto commerr; |
375 |
writepict(args); |
376 |
break; |
377 |
case 'q': /* quit */ |
378 |
if (badcom("quit")) |
379 |
goto commerr; |
380 |
quit(0); |
381 |
case CTRL('C'): /* interrupt */ |
382 |
goto again; |
383 |
#ifdef SIGTSTP |
384 |
case CTRL('Z'):; /* stop */ |
385 |
dostop: |
386 |
devclose(); |
387 |
kill(0, SIGTSTP); |
388 |
/* pc stops here */ |
389 |
devopen(dvcname); |
390 |
redraw(); |
391 |
break; |
392 |
#endif |
393 |
case '\0': /* continue */ |
394 |
break; |
395 |
default:; |
396 |
commerr: |
397 |
if (iscntrl(inpbuf[0])) |
398 |
sprintf(errmsg, "^%c: unknown control", |
399 |
inpbuf[0]|0100); |
400 |
else |
401 |
sprintf(errmsg, "%s: unknown command", inpbuf); |
402 |
error(COMMAND, errmsg); |
403 |
break; |
404 |
} |
405 |
#undef badcom |
406 |
} |
407 |
|
408 |
|
409 |
void |
410 |
rsample() /* sample the image */ |
411 |
{ |
412 |
int xsiz, ysiz, y; |
413 |
RECT r; |
414 |
PNODE *p; |
415 |
register RECT *rl; |
416 |
register PNODE **pl; |
417 |
register int x; |
418 |
/* |
419 |
* We initialize the bottom row in the image at our current |
420 |
* resolution. During sampling, we check super-pixels to the |
421 |
* right and above by calling bigdiff(). If there is a significant |
422 |
* difference, we subsample the super-pixels. The testing process |
423 |
* includes initialization of the next row. |
424 |
*/ |
425 |
xsiz = (((long)(pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu; |
426 |
ysiz = (((long)(pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu; |
427 |
rl = (RECT *)malloc(xsiz*sizeof(RECT)); |
428 |
if (rl == NULL) |
429 |
return; |
430 |
pl = (PNODE **)malloc(xsiz*sizeof(PNODE *)); |
431 |
if (pl == NULL) { |
432 |
free((void *)rl); |
433 |
return; |
434 |
} |
435 |
/* |
436 |
* Initialize the bottom row. |
437 |
*/ |
438 |
rl[0].l = rl[0].d = 0; |
439 |
rl[0].r = hresolu; rl[0].u = vresolu; |
440 |
pl[0] = findrect(pframe.l, pframe.d, &ptrunk, rl, pdepth); |
441 |
for (x = 1; x < xsiz; x++) { |
442 |
rl[x].l = rl[x].d = 0; |
443 |
rl[x].r = hresolu; rl[x].u = vresolu; |
444 |
pl[x] = findrect(pframe.l+((x*hresolu)>>pdepth), |
445 |
pframe.d, &ptrunk, rl+x, pdepth); |
446 |
} |
447 |
/* sample the image */ |
448 |
for (y = 0; /* y < ysiz */ ; y++) { |
449 |
for (x = 0; x < xsiz-1; x++) { |
450 |
if (dev->inpready || errno == ENOMEM) |
451 |
goto escape; |
452 |
/* |
453 |
* Test super-pixel to the right. |
454 |
*/ |
455 |
if (pl[x] != pl[x+1] && bigdiff(pl[x]->v, |
456 |
pl[x+1]->v, maxdiff)) { |
457 |
refine(pl[x], rl[x].l, rl[x].d, |
458 |
rl[x].r, rl[x].u, 1); |
459 |
refine(pl[x+1], rl[x+1].l, rl[x+1].d, |
460 |
rl[x+1].r, rl[x+1].u, 1); |
461 |
} |
462 |
} |
463 |
if (y >= ysiz-1) |
464 |
break; |
465 |
for (x = 0; x < xsiz; x++) { |
466 |
if (dev->inpready || errno == ENOMEM) |
467 |
goto escape; |
468 |
/* |
469 |
* Find super-pixel at this position in next row. |
470 |
*/ |
471 |
r.l = r.d = 0; |
472 |
r.r = hresolu; r.u = vresolu; |
473 |
p = findrect(pframe.l+((x*hresolu)>>pdepth), |
474 |
pframe.d+(((y+1)*vresolu)>>pdepth), |
475 |
&ptrunk, &r, pdepth); |
476 |
/* |
477 |
* Test super-pixel in next row. |
478 |
*/ |
479 |
if (pl[x] != p && bigdiff(pl[x]->v, p->v, maxdiff)) { |
480 |
refine(pl[x], rl[x].l, rl[x].d, |
481 |
rl[x].r, rl[x].u, 1); |
482 |
refine(p, r.l, r.d, r.r, r.u, 1); |
483 |
} |
484 |
/* |
485 |
* Copy into super-pixel array. |
486 |
*/ |
487 |
rl[x].l = r.l; rl[x].d = r.d; |
488 |
rl[x].r = r.r; rl[x].u = r.u; |
489 |
pl[x] = p; |
490 |
} |
491 |
} |
492 |
escape: |
493 |
free((void *)rl); |
494 |
free((void *)pl); |
495 |
} |
496 |
|
497 |
|
498 |
int |
499 |
refine(p, xmin, ymin, xmax, ymax, pd) /* refine a node */ |
500 |
register PNODE *p; |
501 |
int xmin, ymin, xmax, ymax; |
502 |
int pd; |
503 |
{ |
504 |
int growth; |
505 |
int mx, my; |
506 |
int i; |
507 |
|
508 |
if (dev->inpready) /* quit for input */ |
509 |
return(0); |
510 |
|
511 |
if (pd <= 0) /* depth limit */ |
512 |
return(0); |
513 |
|
514 |
mx = (xmin + xmax) >> 1; |
515 |
my = (ymin + ymax) >> 1; |
516 |
growth = 0; |
517 |
|
518 |
if (p->kid == NULL) { /* subdivide */ |
519 |
|
520 |
if ((p->kid = newptree()) == NULL) |
521 |
return(0); |
522 |
/* |
523 |
* The following paint order can leave a black pixel |
524 |
* if redraw() is called in (*dev->paintr)(). |
525 |
*/ |
526 |
if (p->x >= mx && p->y >= my) |
527 |
pcopy(p, p->kid+UR); |
528 |
else |
529 |
paint(p->kid+UR, mx, my, xmax, ymax); |
530 |
if (p->x < mx && p->y >= my) |
531 |
pcopy(p, p->kid+UL); |
532 |
else |
533 |
paint(p->kid+UL, xmin, my, mx, ymax); |
534 |
if (p->x >= mx && p->y < my) |
535 |
pcopy(p, p->kid+DR); |
536 |
else |
537 |
paint(p->kid+DR, mx, ymin, xmax, my); |
538 |
if (p->x < mx && p->y < my) |
539 |
pcopy(p, p->kid+DL); |
540 |
else |
541 |
paint(p->kid+DL, xmin, ymin, mx, my); |
542 |
|
543 |
growth++; |
544 |
} |
545 |
/* do children */ |
546 |
if (mx > pframe.l) { |
547 |
if (my > pframe.d) |
548 |
growth += refine(p->kid+DL, xmin, ymin, mx, my, pd-1); |
549 |
if (my < pframe.u) |
550 |
growth += refine(p->kid+UL, xmin, my, mx, ymax, pd-1); |
551 |
} |
552 |
if (mx < pframe.r) { |
553 |
if (my > pframe.d) |
554 |
growth += refine(p->kid+DR, mx, ymin, xmax, my, pd-1); |
555 |
if (my < pframe.u) |
556 |
growth += refine(p->kid+UR, mx, my, xmax, ymax, pd-1); |
557 |
} |
558 |
/* recompute sum */ |
559 |
if (growth) { |
560 |
setcolor(p->v, 0.0, 0.0, 0.0); |
561 |
for (i = 0; i < 4; i++) |
562 |
addcolor(p->v, p->kid[i].v); |
563 |
scalecolor(p->v, 0.25); |
564 |
} |
565 |
return(growth); |
566 |
} |