| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: rv2.c,v 2.77 2025/04/22 15:47:47 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* rv2.c - command routines used in tracing a view. |
| 6 |
* |
| 7 |
* External symbols declared in rpaint.h |
| 8 |
*/ |
| 9 |
|
| 10 |
#include "copyright.h" |
| 11 |
|
| 12 |
#include <ctype.h> |
| 13 |
#include <string.h> |
| 14 |
|
| 15 |
#include "platform.h" |
| 16 |
#include "rtprocess.h" /* win_popen() */ |
| 17 |
#include "paths.h" |
| 18 |
#include "ray.h" |
| 19 |
#include "ambient.h" |
| 20 |
#include "otypes.h" |
| 21 |
#include "otspecial.h" |
| 22 |
#include "rpaint.h" |
| 23 |
|
| 24 |
extern int psample; /* pixel sample size */ |
| 25 |
extern double maxdiff; /* max. sample difference */ |
| 26 |
|
| 27 |
#define CTRL(c) ((c)-'@') |
| 28 |
|
| 29 |
#define sscanvec(s,v) (sscanf(s,FVFORMAT,v,v+1,v+2)==3) |
| 30 |
|
| 31 |
extern char rifname[128]; /* rad input file name */ |
| 32 |
|
| 33 |
extern char *progname; |
| 34 |
extern char *octname; |
| 35 |
|
| 36 |
|
| 37 |
void |
| 38 |
getframe( /* get a new frame */ |
| 39 |
char *s |
| 40 |
) |
| 41 |
{ |
| 42 |
if (getrect(s, &pframe) < 0) |
| 43 |
return; |
| 44 |
pdepth = 0; |
| 45 |
} |
| 46 |
|
| 47 |
|
| 48 |
void |
| 49 |
getrepaint( /* get area and repaint */ |
| 50 |
char *s |
| 51 |
) |
| 52 |
{ |
| 53 |
RECT box; |
| 54 |
|
| 55 |
if (getrect(s, &box) < 0) |
| 56 |
return; |
| 57 |
paintrect(&ptrunk, &box); |
| 58 |
} |
| 59 |
|
| 60 |
|
| 61 |
void |
| 62 |
getview( /* get/show/save view parameters */ |
| 63 |
char *s |
| 64 |
) |
| 65 |
{ |
| 66 |
FILE *fp; |
| 67 |
char buf[128]; |
| 68 |
char *fname; |
| 69 |
int change = 0; |
| 70 |
VIEW nv = ourview; |
| 71 |
|
| 72 |
while (isspace(*s)) |
| 73 |
s++; |
| 74 |
if (*s == '-') { /* command line parameters */ |
| 75 |
if (sscanview(&nv, s)) |
| 76 |
newview(&nv); |
| 77 |
else |
| 78 |
error(COMMAND, "bad view option(s)"); |
| 79 |
return; |
| 80 |
} |
| 81 |
if (nextword(buf, sizeof(buf), s) != NULL) { /* write to a file */ |
| 82 |
if ((fname = getpath(buf, NULL, 0)) == NULL || |
| 83 |
(fp = fopen(fname, "a")) == NULL) { |
| 84 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
| 85 |
error(COMMAND, errmsg); |
| 86 |
return; |
| 87 |
} |
| 88 |
fputs(progname, fp); |
| 89 |
fprintview(&ourview, fp); |
| 90 |
fputs(sskip(s), fp); |
| 91 |
putc('\n', fp); |
| 92 |
fclose(fp); |
| 93 |
return; |
| 94 |
} |
| 95 |
sprintf(buf, "view type (%c): ", ourview.type); |
| 96 |
(*dev->comout)(buf); |
| 97 |
(*dev->comin)(buf, NULL); |
| 98 |
if (buf[0] == CTRL('C')) return; |
| 99 |
if (buf[0] && buf[0] != ourview.type) { |
| 100 |
nv.type = buf[0]; |
| 101 |
change++; |
| 102 |
} |
| 103 |
sprintf(buf, "view point (%.6g %.6g %.6g): ", |
| 104 |
ourview.vp[0], ourview.vp[1], ourview.vp[2]); |
| 105 |
(*dev->comout)(buf); |
| 106 |
(*dev->comin)(buf, NULL); |
| 107 |
if (buf[0] == CTRL('C')) return; |
| 108 |
if (sscanvec(buf, nv.vp)) |
| 109 |
change++; |
| 110 |
sprintf(buf, "view direction (%.6g %.6g %.6g): ", |
| 111 |
ourview.vdir[0]*ourview.vdist, |
| 112 |
ourview.vdir[1]*ourview.vdist, |
| 113 |
ourview.vdir[2]*ourview.vdist); |
| 114 |
(*dev->comout)(buf); |
| 115 |
(*dev->comin)(buf, NULL); |
| 116 |
if (buf[0] == CTRL('C')) return; |
| 117 |
if (sscanvec(buf, nv.vdir)) { |
| 118 |
nv.vdist = 1.; |
| 119 |
change++; |
| 120 |
} |
| 121 |
sprintf(buf, "view up (%.6g %.6g %.6g): ", |
| 122 |
ourview.vup[0], ourview.vup[1], ourview.vup[2]); |
| 123 |
(*dev->comout)(buf); |
| 124 |
(*dev->comin)(buf, NULL); |
| 125 |
if (buf[0] == CTRL('C')) return; |
| 126 |
if (sscanvec(buf, nv.vup)) |
| 127 |
change++; |
| 128 |
sprintf(buf, "view horiz and vert size (%.6g %.6g): ", |
| 129 |
ourview.horiz, ourview.vert); |
| 130 |
(*dev->comout)(buf); |
| 131 |
(*dev->comin)(buf, NULL); |
| 132 |
if (buf[0] == CTRL('C')) return; |
| 133 |
if (sscanf(buf, "%lf %lf", &nv.horiz, &nv.vert) == 2) |
| 134 |
change++; |
| 135 |
sprintf(buf, "fore and aft clipping plane (%.6g %.6g): ", |
| 136 |
ourview.vfore, ourview.vaft); |
| 137 |
(*dev->comout)(buf); |
| 138 |
(*dev->comin)(buf, NULL); |
| 139 |
if (buf[0] == CTRL('C')) return; |
| 140 |
if (sscanf(buf, "%lf %lf", &nv.vfore, &nv.vaft) == 2) |
| 141 |
change++; |
| 142 |
sprintf(buf, "view shift and lift (%.6g %.6g): ", |
| 143 |
ourview.hoff, ourview.voff); |
| 144 |
(*dev->comout)(buf); |
| 145 |
(*dev->comin)(buf, NULL); |
| 146 |
if (buf[0] == CTRL('C')) return; |
| 147 |
if (sscanf(buf, "%lf %lf", &nv.hoff, &nv.voff) == 2) |
| 148 |
change++; |
| 149 |
if (change) |
| 150 |
newview(&nv); |
| 151 |
} |
| 152 |
|
| 153 |
|
| 154 |
void |
| 155 |
lastview( /* return to a previous view */ |
| 156 |
char *s |
| 157 |
) |
| 158 |
{ |
| 159 |
char buf[128]; |
| 160 |
char *fname; |
| 161 |
int success; |
| 162 |
VIEW nv; |
| 163 |
/* get parameters from a file */ |
| 164 |
if (nextword(buf, sizeof(buf), s) != NULL) { |
| 165 |
nv = stdview; |
| 166 |
if ((fname = getpath(buf, "", R_OK)) == NULL || |
| 167 |
(success = viewfile(fname, &nv, NULL)) == -1) { |
| 168 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
| 169 |
error(COMMAND, errmsg); |
| 170 |
return; |
| 171 |
} |
| 172 |
if (!success) |
| 173 |
error(COMMAND, "wrong file format"); |
| 174 |
else |
| 175 |
newview(&nv); |
| 176 |
return; |
| 177 |
} |
| 178 |
if (oldview.type == 0) { /* no old view! */ |
| 179 |
error(COMMAND, "no previous view"); |
| 180 |
return; |
| 181 |
} |
| 182 |
nv = ourview; |
| 183 |
ourview = oldview; |
| 184 |
oldview = nv; |
| 185 |
newimage(NULL); |
| 186 |
} |
| 187 |
|
| 188 |
|
| 189 |
void |
| 190 |
saveview( /* save view to rad file */ |
| 191 |
char *s |
| 192 |
) |
| 193 |
{ |
| 194 |
char view[64]; |
| 195 |
char *fname; |
| 196 |
FILE *fp; |
| 197 |
|
| 198 |
if (*atos(view, sizeof(view), s)) { |
| 199 |
if (isint(view)) { |
| 200 |
error(COMMAND, "cannot write view by number"); |
| 201 |
return; |
| 202 |
} |
| 203 |
s = sskip(s); |
| 204 |
} |
| 205 |
if (nextword(rifname, sizeof(rifname), s) == NULL && !rifname[0]) { |
| 206 |
error(COMMAND, "no previous rad file"); |
| 207 |
return; |
| 208 |
} |
| 209 |
if ((fname = getpath(rifname, NULL, 0)) == NULL || |
| 210 |
(fp = fopen(fname, "a")) == NULL) { |
| 211 |
sprintf(errmsg, "cannot open \"%s\"", rifname); |
| 212 |
error(COMMAND, errmsg); |
| 213 |
return; |
| 214 |
} |
| 215 |
fputs("view= ", fp); |
| 216 |
fputs(view, fp); |
| 217 |
fprintview(&ourview, fp); |
| 218 |
putc('\n', fp); |
| 219 |
fclose(fp); |
| 220 |
} |
| 221 |
|
| 222 |
|
| 223 |
void |
| 224 |
loadview( /* load view from rad file */ |
| 225 |
char *s |
| 226 |
) |
| 227 |
{ |
| 228 |
char buf[512]; |
| 229 |
char *fname; |
| 230 |
FILE *fp; |
| 231 |
VIEW nv; |
| 232 |
|
| 233 |
strcpy(buf, "rad -n -s -V -v "); |
| 234 |
if (sscanf(s, "%s", buf+strlen(buf)) == 1) |
| 235 |
s = sskip(s); |
| 236 |
else |
| 237 |
strcat(buf, "1"); |
| 238 |
if (nextword(rifname, sizeof(rifname), s) == NULL && !rifname[0]) { |
| 239 |
error(COMMAND, "no previous rad file"); |
| 240 |
return; |
| 241 |
} |
| 242 |
if ((fname = getpath(rifname, "", R_OK)) == NULL) { |
| 243 |
sprintf(errmsg, "cannot access \"%s\"", rifname); |
| 244 |
error(COMMAND, errmsg); |
| 245 |
return; |
| 246 |
} |
| 247 |
sprintf(buf+strlen(buf), " %s", fname); |
| 248 |
if ((fp = popen(buf, "r")) == NULL) { |
| 249 |
error(COMMAND, "cannot run rad"); |
| 250 |
return; |
| 251 |
} |
| 252 |
buf[0] = '\0'; |
| 253 |
fgets(buf, sizeof(buf), fp); |
| 254 |
pclose(fp); |
| 255 |
nv = stdview; |
| 256 |
if (!sscanview(&nv, buf)) { |
| 257 |
error(COMMAND, "rad error -- no such view?"); |
| 258 |
return; |
| 259 |
} |
| 260 |
newview(&nv); |
| 261 |
} |
| 262 |
|
| 263 |
|
| 264 |
void |
| 265 |
getaim( /* aim camera */ |
| 266 |
char *s |
| 267 |
) |
| 268 |
{ |
| 269 |
VIEW nv = ourview; |
| 270 |
double zfact; |
| 271 |
|
| 272 |
if (getinterest(s, 1, nv.vdir, &zfact) < 0) |
| 273 |
return; |
| 274 |
zoomview(&nv, zfact); |
| 275 |
newview(&nv); |
| 276 |
} |
| 277 |
|
| 278 |
|
| 279 |
void |
| 280 |
getfocus( /* set focus distance */ |
| 281 |
char *s |
| 282 |
) |
| 283 |
{ |
| 284 |
char buf[64]; |
| 285 |
double dist; |
| 286 |
|
| 287 |
if (sscanf(s, "%lf", &dist) < 1) { |
| 288 |
int x, y; |
| 289 |
RAY thisray; |
| 290 |
if (dev->getcur == NULL) |
| 291 |
return; |
| 292 |
(*dev->comout)("Pick focus point\n"); |
| 293 |
if ((*dev->getcur)(&x, &y) == ABORT) |
| 294 |
return; |
| 295 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
| 296 |
&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
| 297 |
error(COMMAND, "not on image"); |
| 298 |
return; |
| 299 |
} |
| 300 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
| 301 |
if (!localhit(&thisray, &thescene)) { |
| 302 |
error(COMMAND, "not a local object"); |
| 303 |
return; |
| 304 |
} |
| 305 |
dist = thisray.rot; |
| 306 |
} else if (dist <= .0) { |
| 307 |
error(COMMAND, "focus distance must be positive"); |
| 308 |
return; |
| 309 |
} |
| 310 |
ourview.vdist = dist; |
| 311 |
sprintf(buf, "Focus distance set to %f\n", dist); |
| 312 |
(*dev->comout)(buf); |
| 313 |
} |
| 314 |
|
| 315 |
|
| 316 |
void |
| 317 |
getmove( /* move camera */ |
| 318 |
char *s |
| 319 |
) |
| 320 |
{ |
| 321 |
FVECT vc; |
| 322 |
double mag; |
| 323 |
|
| 324 |
if (getinterest(s, 0, vc, &mag) < 0) |
| 325 |
return; |
| 326 |
moveview(0.0, 0.0, mag, vc); |
| 327 |
} |
| 328 |
|
| 329 |
|
| 330 |
void |
| 331 |
getrotate( /* rotate camera */ |
| 332 |
char *s |
| 333 |
) |
| 334 |
{ |
| 335 |
VIEW nv = ourview; |
| 336 |
double angle, elev, zfact; |
| 337 |
|
| 338 |
elev = 0.0; zfact = 1.0; |
| 339 |
if (sscanf(s, "%lf %lf %lf", &angle, &elev, &zfact) < 1) { |
| 340 |
error(COMMAND, "missing angle"); |
| 341 |
return; |
| 342 |
} |
| 343 |
spinvector(nv.vdir, ourview.vdir, ourview.vup, angle*(PI/180.)); |
| 344 |
if (elev != 0.0) |
| 345 |
geodesic(nv.vdir, nv.vdir, nv.vup, elev*(PI/180.), GEOD_RAD); |
| 346 |
|
| 347 |
zoomview(&nv, zfact); |
| 348 |
newview(&nv); |
| 349 |
} |
| 350 |
|
| 351 |
|
| 352 |
void |
| 353 |
getpivot( /* pivot viewpoint */ |
| 354 |
char *s |
| 355 |
) |
| 356 |
{ |
| 357 |
FVECT vc; |
| 358 |
double angle, elev, mag; |
| 359 |
|
| 360 |
elev = 0.0; |
| 361 |
if (sscanf(s, "%lf %lf", &angle, &elev) < 1) { |
| 362 |
error(COMMAND, "missing angle"); |
| 363 |
return; |
| 364 |
} |
| 365 |
if (getinterest(sskip2(s,2), 0, vc, &mag) < 0) |
| 366 |
return; |
| 367 |
moveview(angle, elev, mag, vc); |
| 368 |
} |
| 369 |
|
| 370 |
|
| 371 |
void |
| 372 |
getorigin( /* origin viewpoint */ |
| 373 |
char *s |
| 374 |
) |
| 375 |
{ |
| 376 |
VIEW nv = ourview; |
| 377 |
double d; |
| 378 |
/* get new view origin */ |
| 379 |
if (sscanf(s, "%lf %lf", &d, &d) == 1) { |
| 380 |
/* just moving some distance */ |
| 381 |
VSUM(nv.vp, nv.vp, nv.vdir, d); |
| 382 |
} else if (!sscanvec(s, nv.vp)) { |
| 383 |
int x, y; /* need to pick origin */ |
| 384 |
RAY thisray; |
| 385 |
if (dev->getcur == NULL) |
| 386 |
return; |
| 387 |
(*dev->comout)("Pick point on surface for new origin\n"); |
| 388 |
if ((*dev->getcur)(&x, &y) == ABORT) |
| 389 |
return; |
| 390 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
| 391 |
&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
| 392 |
error(COMMAND, "not on image"); |
| 393 |
return; |
| 394 |
} |
| 395 |
rayorigin(&thisray, PRIMARY, NULL, NULL); |
| 396 |
if (!localhit(&thisray, &thescene)) { |
| 397 |
error(COMMAND, "not a local object"); |
| 398 |
return; |
| 399 |
} |
| 400 |
if (thisray.rod < 0.0) /* don't look through other side */ |
| 401 |
flipsurface(&thisray); |
| 402 |
VSUM(nv.vp, thisray.rop, thisray.ron, 20.0*FTINY); |
| 403 |
VCOPY(nv.vdir, thisray.ron); |
| 404 |
} else if (!sscanvec(sskip2(s,3), nv.vdir) || normalize(nv.vdir) == 0.0) |
| 405 |
VCOPY(nv.vdir, ourview.vdir); |
| 406 |
|
| 407 |
d = DOT(nv.vdir, nv.vup); /* need different up vector? */ |
| 408 |
if (d*d >= 1.-2.*FTINY) { |
| 409 |
int i; |
| 410 |
nv.vup[0] = nv.vup[1] = nv.vup[2] = 0.0; |
| 411 |
for (i = 3; i--; ) |
| 412 |
if (nv.vdir[i]*nv.vdir[i] < 0.34) |
| 413 |
break; |
| 414 |
nv.vup[i] = 1.; |
| 415 |
} |
| 416 |
newview(&nv); |
| 417 |
} |
| 418 |
|
| 419 |
|
| 420 |
void |
| 421 |
getexposure( /* get new exposure */ |
| 422 |
char *s |
| 423 |
) |
| 424 |
{ |
| 425 |
char buf[128]; |
| 426 |
char *cp; |
| 427 |
int x, y; |
| 428 |
PNODE *p = &ptrunk; |
| 429 |
int adapt = 0; |
| 430 |
double e = 1.0; |
| 431 |
|
| 432 |
for (cp = s; isspace(*cp); cp++) |
| 433 |
; |
| 434 |
if (*cp == '@') { |
| 435 |
adapt++; |
| 436 |
while (isspace(*++cp)) |
| 437 |
; |
| 438 |
} |
| 439 |
if (*cp == '\0') { /* normalize to point */ |
| 440 |
if (dev->getcur == NULL) |
| 441 |
return; |
| 442 |
(*dev->comout)("Pick point for exposure\n"); |
| 443 |
if ((*dev->getcur)(&x, &y) == ABORT) |
| 444 |
return; |
| 445 |
p = findrect(x, y, &ptrunk, -1); |
| 446 |
} else { |
| 447 |
if (*cp == '=') { /* absolute setting */ |
| 448 |
p = NULL; |
| 449 |
e = 1.0/exposure; |
| 450 |
for (cp++; isspace(*cp); cp++) |
| 451 |
; |
| 452 |
if (*cp == '\0') { /* interactive */ |
| 453 |
sprintf(buf, "exposure (%f): ", exposure); |
| 454 |
(*dev->comout)(buf); |
| 455 |
(*dev->comin)(buf, NULL); |
| 456 |
for (cp = buf; isspace(*cp); cp++) |
| 457 |
; |
| 458 |
if (*cp == '\0') |
| 459 |
return; |
| 460 |
} |
| 461 |
} |
| 462 |
if ((*cp == '+') | (*cp == '-')) /* f-stops */ |
| 463 |
e *= pow(2.0, atof(cp)); |
| 464 |
else /* multiplier */ |
| 465 |
e *= atof(cp); |
| 466 |
} |
| 467 |
if (p != NULL) { /* relative setting */ |
| 468 |
compavg(p); |
| 469 |
if (bright(p->v) < 1e-15) { |
| 470 |
error(COMMAND, "cannot normalize to zero"); |
| 471 |
return; |
| 472 |
} |
| 473 |
if (adapt) |
| 474 |
e *= 106./pow(1.219+pow(luminance(p->v)/exposure,.4),2.5)/exposure; |
| 475 |
else |
| 476 |
e *= 0.5 / bright(p->v); |
| 477 |
} |
| 478 |
if (e <= FTINY || fabs(1.0 - e) <= FTINY) |
| 479 |
return; |
| 480 |
scalepict(&ptrunk, e); |
| 481 |
exposure *= e; |
| 482 |
redraw(); |
| 483 |
} |
| 484 |
|
| 485 |
typedef union {int i; double d; COLOR C;} *MyUptr; |
| 486 |
|
| 487 |
int |
| 488 |
getparam( /* get variable from user */ |
| 489 |
char *str, |
| 490 |
char *dsc, |
| 491 |
int typ, |
| 492 |
void *p |
| 493 |
) |
| 494 |
{ |
| 495 |
MyUptr ptr = (MyUptr)p; |
| 496 |
int i0; |
| 497 |
double d0, d1, d2; |
| 498 |
char buf[48]; |
| 499 |
|
| 500 |
switch (typ) { |
| 501 |
case 'i': /* integer */ |
| 502 |
if (sscanf(str, "%d", &i0) != 1) { |
| 503 |
(*dev->comout)(dsc); |
| 504 |
sprintf(buf, " (%d): ", ptr->i); |
| 505 |
(*dev->comout)(buf); |
| 506 |
(*dev->comin)(buf, NULL); |
| 507 |
if (sscanf(buf, "%d", &i0) != 1) |
| 508 |
return(0); |
| 509 |
} |
| 510 |
if (ptr->i == i0) |
| 511 |
return(0); |
| 512 |
ptr->i = i0; |
| 513 |
break; |
| 514 |
case 'r': /* real */ |
| 515 |
if (sscanf(str, "%lf", &d0) != 1) { |
| 516 |
(*dev->comout)(dsc); |
| 517 |
sprintf(buf, " (%.6g): ", ptr->d); |
| 518 |
(*dev->comout)(buf); |
| 519 |
(*dev->comin)(buf, NULL); |
| 520 |
if (sscanf(buf, "%lf", &d0) != 1) |
| 521 |
return(0); |
| 522 |
} |
| 523 |
if (FRELEQ(ptr->d, d0)) |
| 524 |
return(0); |
| 525 |
ptr->d = d0; |
| 526 |
break; |
| 527 |
case 'b': /* boolean */ |
| 528 |
if (sscanf(str, "%1s", buf) != 1) { |
| 529 |
(*dev->comout)(dsc); |
| 530 |
sprintf(buf, "? (%c): ", ptr->i ? 'y' : 'n'); |
| 531 |
(*dev->comout)(buf); |
| 532 |
(*dev->comin)(buf, NULL); |
| 533 |
if (buf[0] == '\0') |
| 534 |
return(0); |
| 535 |
} |
| 536 |
if (strchr("yY+1tTnN-0fF", buf[0]) == NULL) |
| 537 |
return(0); |
| 538 |
i0 = strchr("yY+1tT", buf[0]) != NULL; |
| 539 |
if (ptr->i == i0) |
| 540 |
return(0); |
| 541 |
ptr->i = i0; |
| 542 |
break; |
| 543 |
case 'C': /* color */ |
| 544 |
if (sscanf(str, "%lf %lf %lf", &d0, &d1, &d2) != 3) { |
| 545 |
(*dev->comout)(dsc); |
| 546 |
sprintf(buf, " (%.6g %.6g %.6g): ", |
| 547 |
colval(ptr->C,RED), |
| 548 |
colval(ptr->C,GRN), |
| 549 |
colval(ptr->C,BLU)); |
| 550 |
(*dev->comout)(buf); |
| 551 |
(*dev->comin)(buf, NULL); |
| 552 |
if (sscanf(buf, "%lf %lf %lf", &d0, &d1, &d2) != 3) |
| 553 |
return(0); |
| 554 |
} |
| 555 |
if (FRELEQ(colval(ptr->C,RED), d0) && |
| 556 |
FRELEQ(colval(ptr->C,GRN), d1) && |
| 557 |
FRELEQ(colval(ptr->C,BLU), d2)) |
| 558 |
return(0); |
| 559 |
setcolor(ptr->C, d0, d1, d2); |
| 560 |
break; |
| 561 |
default: |
| 562 |
return(0); /* shouldn't happen */ |
| 563 |
} |
| 564 |
newparam++; |
| 565 |
return(1); |
| 566 |
} |
| 567 |
|
| 568 |
|
| 569 |
void |
| 570 |
setparam( /* get/set program parameter */ |
| 571 |
char *s |
| 572 |
) |
| 573 |
{ |
| 574 |
int prev_newp = newparam; |
| 575 |
char buf[128]; |
| 576 |
|
| 577 |
if (s[0] == '\0') { |
| 578 |
(*dev->comout)( |
| 579 |
"aa ab ad ar as av aw b bv dc dv dj ds dt i lr lw me ma mg ms ps pt ss st u: "); |
| 580 |
(*dev->comin)(buf, NULL); |
| 581 |
s = buf; |
| 582 |
} |
| 583 |
switch (s[0]) { |
| 584 |
case 'u': /* uncorrelated sampling */ |
| 585 |
getparam(s+1, "uncorrelated sampling", 'b', |
| 586 |
(void *)&rand_samp); |
| 587 |
break; |
| 588 |
case 'l': /* limit */ |
| 589 |
switch (s[1]) { |
| 590 |
case 'w': /* weight */ |
| 591 |
getparam(s+2, "limit weight", 'r', &minweight); |
| 592 |
break; |
| 593 |
case 'r': /* reflection */ |
| 594 |
getparam(s+2, "limit reflection", 'i', &maxdepth); |
| 595 |
break; |
| 596 |
default: |
| 597 |
goto badparam; |
| 598 |
} |
| 599 |
break; |
| 600 |
case 'd': /* direct */ |
| 601 |
switch (s[1]) { |
| 602 |
case 'j': /* jitter */ |
| 603 |
getparam(s+2, "direct jitter", 'r', &dstrsrc); |
| 604 |
break; |
| 605 |
case 'c': /* certainty */ |
| 606 |
getparam(s+2, "direct certainty", 'r', &shadcert); |
| 607 |
break; |
| 608 |
case 't': /* threshold */ |
| 609 |
getparam(s+2, "direct threshold", 'r', &shadthresh); |
| 610 |
break; |
| 611 |
case 'v': /* visibility */ |
| 612 |
getparam(s+2, "direct visibility", 'b', &directvis); |
| 613 |
break; |
| 614 |
case 's': /* sampling */ |
| 615 |
getparam(s+2, "direct sampling", 'r', &srcsizerat); |
| 616 |
break; |
| 617 |
default: |
| 618 |
goto badparam; |
| 619 |
} |
| 620 |
break; |
| 621 |
case 'b': /* back faces or black and white */ |
| 622 |
switch (s[1]) { |
| 623 |
case 'v': /* back face visibility */ |
| 624 |
getparam(s+2, "back face visibility", 'b', |
| 625 |
(void *)&backvis); |
| 626 |
break; |
| 627 |
case '\0': /* black and white */ |
| 628 |
case ' ': |
| 629 |
case 'y': case 'Y': case 't': case 'T': case '1': case '+': |
| 630 |
case 'n': case 'N': case 'f': case 'F': case '0': case '-': |
| 631 |
getparam(s+1, "black and white", 'b', &greyscale); |
| 632 |
newparam = prev_newp; |
| 633 |
break; |
| 634 |
default: |
| 635 |
goto badparam; |
| 636 |
} |
| 637 |
break; |
| 638 |
case 'i': /* irradiance */ |
| 639 |
getparam(s+1, "irradiance", 'b', &do_irrad); |
| 640 |
break; |
| 641 |
case 'a': /* ambient */ |
| 642 |
switch (s[1]) { |
| 643 |
case 'v': /* value */ |
| 644 |
getparam(s+2, "ambient value", 'C', ambval); |
| 645 |
break; |
| 646 |
case 'w': /* weight */ |
| 647 |
getparam(s+2, "ambient value weight", 'i', &ambvwt); |
| 648 |
break; |
| 649 |
case 'a': /* accuracy */ |
| 650 |
if (getparam(s+2, "ambient accuracy", 'r', &ambacc)) |
| 651 |
setambacc(ambacc); |
| 652 |
break; |
| 653 |
case 'd': /* divisions */ |
| 654 |
getparam(s+2, "ambient divisions", 'i', &ambdiv); |
| 655 |
break; |
| 656 |
case 's': /* samples */ |
| 657 |
getparam(s+2, "ambient super-samples", 'i', &ambssamp); |
| 658 |
break; |
| 659 |
case 'b': /* bounces */ |
| 660 |
getparam(s+2, "ambient bounces", 'i', &ambounce); |
| 661 |
break; |
| 662 |
case 'r': |
| 663 |
if (getparam(s+2, "ambient resolution", 'i', &ambres)) |
| 664 |
setambres(ambres); |
| 665 |
break; |
| 666 |
default: |
| 667 |
goto badparam; |
| 668 |
} |
| 669 |
break; |
| 670 |
case 'm': /* medium */ |
| 671 |
switch (s[1]) { |
| 672 |
case 'e': /* extinction coefficient */ |
| 673 |
getparam(s+2, "extinction coefficient", 'C', cextinction); |
| 674 |
break; |
| 675 |
case 'a': /* scattering albedo */ |
| 676 |
getparam(s+2, "scattering albedo", 'C', salbedo); |
| 677 |
break; |
| 678 |
case 'g': /* scattering eccentricity */ |
| 679 |
getparam(s+2, "scattering eccentricity", 'r', &seccg); |
| 680 |
break; |
| 681 |
case 's': /* sampling distance */ |
| 682 |
getparam(s+2, "mist sampling distance", 'r', &ssampdist); |
| 683 |
break; |
| 684 |
default: |
| 685 |
goto badparam; |
| 686 |
} |
| 687 |
break; |
| 688 |
case 'p': /* pixel */ |
| 689 |
switch (s[1]) { |
| 690 |
case 's': /* sample */ |
| 691 |
if (getparam(s+2, "pixel sample", 'i', &psample)) |
| 692 |
pdepth = 0; |
| 693 |
break; |
| 694 |
case 't': /* threshold */ |
| 695 |
if (getparam(s+2, "pixel threshold", 'r', &maxdiff)) |
| 696 |
pdepth = 0; |
| 697 |
break; |
| 698 |
default: |
| 699 |
goto badparam; |
| 700 |
} |
| 701 |
newparam = prev_newp; |
| 702 |
break; |
| 703 |
case 's': /* specular */ |
| 704 |
switch (s[1]) { |
| 705 |
case 's': /* sampling */ |
| 706 |
getparam(s+2, "specular sampling", 'r', &specjitter); |
| 707 |
break; |
| 708 |
case 't': /* threshold */ |
| 709 |
getparam(s+2, "specular threshold", 'r', &specthresh); |
| 710 |
break; |
| 711 |
default: |
| 712 |
goto badparam; |
| 713 |
} |
| 714 |
break; |
| 715 |
case '\0': /* nothing */ |
| 716 |
break; |
| 717 |
default:; |
| 718 |
badparam: |
| 719 |
*sskip(s) = '\0'; |
| 720 |
sprintf(errmsg, "%s: unknown variable", s); |
| 721 |
error(COMMAND, errmsg); |
| 722 |
break; |
| 723 |
} |
| 724 |
} |
| 725 |
|
| 726 |
|
| 727 |
void |
| 728 |
traceray( /* trace a single ray */ |
| 729 |
char *s |
| 730 |
) |
| 731 |
{ |
| 732 |
RAY thisray; |
| 733 |
char buf[512]; |
| 734 |
COLOR col; |
| 735 |
|
| 736 |
thisray.rmax = 0.0; |
| 737 |
|
| 738 |
if (!sscanvec(s, thisray.rorg) || |
| 739 |
!sscanvec(sskip2(s,3), thisray.rdir)) { |
| 740 |
int x, y; |
| 741 |
|
| 742 |
if (dev->getcur == NULL) |
| 743 |
return; |
| 744 |
(*dev->comout)("Pick ray\n"); |
| 745 |
if ((*dev->getcur)(&x, &y) == ABORT) |
| 746 |
return; |
| 747 |
|
| 748 |
if ((thisray.rmax = viewray(thisray.rorg, thisray.rdir, |
| 749 |
&ourview, (x+.5)/hresolu, (y+.5)/vresolu)) < -FTINY) { |
| 750 |
error(COMMAND, "not on image"); |
| 751 |
return; |
| 752 |
} |
| 753 |
|
| 754 |
} else if (normalize(thisray.rdir) == 0.0) { |
| 755 |
error(COMMAND, "zero ray direction"); |
| 756 |
return; |
| 757 |
} |
| 758 |
|
| 759 |
ray_trace(&thisray); |
| 760 |
|
| 761 |
if (thisray.ro == NULL) |
| 762 |
(*dev->comout)("ray hit nothing"); |
| 763 |
else { |
| 764 |
OBJREC *mat = NULL; |
| 765 |
OBJREC *mod = NULL; |
| 766 |
char matspec[256]; |
| 767 |
OBJREC *ino; |
| 768 |
|
| 769 |
matspec[0] = '\0'; |
| 770 |
if (thisray.ro->omod != OVOID) { |
| 771 |
mod = objptr(thisray.ro->omod); |
| 772 |
mat = findmaterial(thisray.ro); |
| 773 |
} |
| 774 |
if (thisray.rod < 0.0) |
| 775 |
strcpy(matspec, "back of "); |
| 776 |
if (mod != NULL) { |
| 777 |
strcat(matspec, mod->oname); |
| 778 |
if (mat != mod && mat != NULL) |
| 779 |
sprintf(matspec+strlen(matspec), |
| 780 |
" (%s)", mat->oname); |
| 781 |
} else |
| 782 |
strcat(matspec, VOIDID); |
| 783 |
sprintf(buf, "ray hit %s %s \"%s\"", matspec, |
| 784 |
ofun[thisray.ro->otype].funame, |
| 785 |
thisray.ro->oname); |
| 786 |
if ((ino = objptr(thisray.robj)) != thisray.ro) |
| 787 |
sprintf(buf+strlen(buf), " in %s \"%s\"", |
| 788 |
ofun[ino->otype].funame, ino->oname); |
| 789 |
(*dev->comout)(buf); |
| 790 |
(*dev->comin)(buf, NULL); |
| 791 |
if (thisray.rot >= FHUGE*.99) |
| 792 |
(*dev->comout)("at infinity"); |
| 793 |
else { |
| 794 |
sprintf(buf, "at (%.3f %.3f %.3f) (%.6g)", |
| 795 |
thisray.rop[0], thisray.rop[1], |
| 796 |
thisray.rop[2], raydistance(&thisray)); |
| 797 |
(*dev->comout)(buf); |
| 798 |
} |
| 799 |
(*dev->comin)(buf, NULL); |
| 800 |
scolor_rgb(col, thisray.rcol); |
| 801 |
sprintf(buf, "value (%.4g %.4g %.4g) (%.3gL)", |
| 802 |
colval(col,RED), |
| 803 |
colval(col,GRN), |
| 804 |
colval(col,BLU), |
| 805 |
luminance(col)); |
| 806 |
(*dev->comout)(buf); |
| 807 |
} |
| 808 |
(*dev->comin)(buf, NULL); |
| 809 |
} |
| 810 |
|
| 811 |
|
| 812 |
void |
| 813 |
writepict( /* write the picture to a file */ |
| 814 |
char *s |
| 815 |
) |
| 816 |
{ |
| 817 |
static char buf[128]; |
| 818 |
char *fname; |
| 819 |
FILE *fp; |
| 820 |
COLR *scanline; |
| 821 |
int y; |
| 822 |
/* XXX relies on words.c 2.11 behavior */ |
| 823 |
if (nextword(buf, sizeof(buf), s) == NULL && !buf[0]) { |
| 824 |
error(COMMAND, "no file"); |
| 825 |
return; |
| 826 |
} |
| 827 |
if ((fname = getpath(buf, NULL, 0)) == NULL || |
| 828 |
(fp = fopen(fname, "w")) == NULL) { |
| 829 |
sprintf(errmsg, "cannot open \"%s\"", buf); |
| 830 |
error(COMMAND, errmsg); |
| 831 |
return; |
| 832 |
} |
| 833 |
SET_FILE_BINARY(fp); |
| 834 |
(*dev->comout)("writing \""); |
| 835 |
(*dev->comout)(fname); |
| 836 |
(*dev->comout)("\"...\n"); |
| 837 |
/* write header */ |
| 838 |
newheader("RADIANCE", fp); |
| 839 |
fputs(progname, fp); |
| 840 |
fprintview(&ourview, fp); |
| 841 |
if (octname != NULL) |
| 842 |
fprintf(fp, " %s\n", octname); |
| 843 |
else |
| 844 |
putc('\n', fp); |
| 845 |
fprintf(fp, "SOFTWARE= %s\n", VersionID); |
| 846 |
fputnow(fp); |
| 847 |
if (exposure != 1.0) |
| 848 |
fputexpos(exposure, fp); |
| 849 |
if (dev->pixaspect != 1.0) |
| 850 |
fputaspect(dev->pixaspect, fp); |
| 851 |
fputprims(stdprims, fp); |
| 852 |
fputformat(COLRFMT, fp); |
| 853 |
putc('\n', fp); |
| 854 |
fprtresolu(hresolu, vresolu, fp); |
| 855 |
|
| 856 |
scanline = (COLR *)malloc(hresolu*sizeof(COLR)); |
| 857 |
if (scanline == NULL) { |
| 858 |
error(COMMAND, "not enough memory!"); |
| 859 |
fclose(fp); |
| 860 |
unlink(fname); |
| 861 |
return; |
| 862 |
} |
| 863 |
for (y = vresolu-1; y >= 0; y--) { |
| 864 |
getpictcolrs(y, scanline, &ptrunk, hresolu, vresolu); |
| 865 |
if (fwritecolrs(scanline, hresolu, fp) < 0) |
| 866 |
break; |
| 867 |
} |
| 868 |
free((void *)scanline); |
| 869 |
if (fclose(fp) < 0) |
| 870 |
error(COMMAND, "write error"); |
| 871 |
} |
