| 15 |
|
#include "paths.h" |
| 16 |
|
#include "view.h" |
| 17 |
|
|
| 18 |
– |
|
| 19 |
– |
#define FEQ(x,y) (fabs((x)-(y)) <= FTINY) |
| 20 |
– |
#define VEQ(v,w) (FEQ((v)[0],(w)[0]) && FEQ((v)[1],(w)[1]) \ |
| 21 |
– |
&& FEQ((v)[2],(w)[2])) |
| 22 |
– |
|
| 18 |
|
VIEW stdview = STDVIEW; /* default view parameters */ |
| 19 |
|
|
| 20 |
|
static gethfunc gethview; |
| 221 |
|
} |
| 222 |
|
|
| 223 |
|
|
| 224 |
< |
void |
| 224 |
> |
int |
| 225 |
|
viewloc( /* find image location for point */ |
| 226 |
|
FVECT ip, |
| 227 |
|
VIEW *v, |
| 228 |
|
FVECT p |
| 229 |
< |
) |
| 229 |
> |
) /* Use VL_* flags to interpret return value */ |
| 230 |
|
{ |
| 231 |
+ |
int rflags = VL_GOOD; |
| 232 |
|
double d, d2; |
| 233 |
|
FVECT disp; |
| 234 |
|
|
| 240 |
|
break; |
| 241 |
|
case VT_PER: /* perspective view */ |
| 242 |
|
d = DOT(disp,v->vdir); |
| 243 |
+ |
if ((v->vaft > FTINY) & (d >= v->vaft)) |
| 244 |
+ |
rflags |= VL_BEYOND; |
| 245 |
|
ip[2] = VLEN(disp); |
| 246 |
< |
if (d < 0.0) { /* fold pyramid */ |
| 246 |
> |
if (d < -FTINY) { /* fold pyramid */ |
| 247 |
|
ip[2] = -ip[2]; |
| 248 |
|
d = -d; |
| 249 |
< |
} |
| 250 |
< |
if (d > FTINY) { |
| 251 |
< |
d = 1.0/d; |
| 252 |
< |
disp[0] *= d; |
| 253 |
< |
disp[1] *= d; |
| 254 |
< |
disp[2] *= d; |
| 255 |
< |
} |
| 249 |
> |
} else if (d <= FTINY) |
| 250 |
> |
return(VL_BAD); /* at infinite edge */ |
| 251 |
> |
d = 1.0/d; |
| 252 |
> |
disp[0] *= d; |
| 253 |
> |
disp[1] *= d; |
| 254 |
> |
disp[2] *= d; |
| 255 |
> |
if (ip[2] < 0.0) d = -d; |
| 256 |
|
ip[2] *= (1.0 - v->vfore*d); |
| 257 |
|
break; |
| 258 |
|
case VT_HEM: /* hemispherical fisheye */ |
| 267 |
|
d = DOT(disp,v->hvec); |
| 268 |
|
d2 = DOT(disp,v->vdir); |
| 269 |
|
ip[0] = 180.0/PI * atan2(d,d2) / v->horiz + 0.5 - v->hoff; |
| 270 |
< |
d = 1.0/sqrt(d*d + d2*d2); |
| 270 |
> |
d2 = d*d + d2*d2; |
| 271 |
> |
if (d2 <= FTINY*FTINY) |
| 272 |
> |
return(VL_BAD); /* at pole */ |
| 273 |
> |
if ((v->vaft > FTINY) & (d2 >= v->vaft*v->vaft)) |
| 274 |
> |
rflags |= VL_BEYOND; |
| 275 |
> |
d = 1.0/sqrt(d2); |
| 276 |
|
ip[1] = DOT(disp,v->vvec)*d/v->vn2 + 0.5 - v->voff; |
| 277 |
|
ip[2] = VLEN(disp); |
| 278 |
|
ip[2] *= (1.0 - v->vfore*d); |
| 279 |
< |
return; |
| 279 |
> |
goto gotall; |
| 280 |
|
case VT_ANG: /* angular fisheye */ |
| 281 |
|
ip[0] = 0.5 - v->hoff; |
| 282 |
|
ip[1] = 0.5 - v->voff; |
| 283 |
|
ip[2] = normalize(disp) - v->vfore; |
| 284 |
|
d = DOT(disp,v->vdir); |
| 285 |
|
if (d >= 1.0-FTINY) |
| 286 |
< |
return; |
| 286 |
> |
goto gotall; |
| 287 |
|
if (d <= -(1.0-FTINY)) { |
| 288 |
|
ip[0] += 180.0/v->horiz; |
| 289 |
< |
return; |
| 289 |
> |
goto gotall; |
| 290 |
|
} |
| 291 |
|
d = (180.0/PI)*acos(d) / sqrt(1.0 - d*d); |
| 292 |
|
ip[0] += DOT(disp,v->hvec)*d/v->horiz; |
| 293 |
|
ip[1] += DOT(disp,v->vvec)*d/v->vert; |
| 294 |
< |
return; |
| 294 |
> |
goto gotall; |
| 295 |
|
case VT_PLS: /* planispheric fisheye */ |
| 296 |
|
ip[0] = 0.5 - v->hoff; |
| 297 |
|
ip[1] = 0.5 - v->voff; |
| 298 |
|
ip[2] = normalize(disp) - v->vfore; |
| 299 |
|
d = DOT(disp,v->vdir); |
| 300 |
|
if (d >= 1.0-FTINY) |
| 301 |
< |
return; |
| 301 |
> |
goto gotall; |
| 302 |
|
if (d <= -(1.0-FTINY)) |
| 303 |
< |
return; /* really an error */ |
| 303 |
> |
return(VL_BAD); |
| 304 |
|
ip[0] += DOT(disp,v->hvec)/((1. + d)*sqrt(v->hn2)); |
| 305 |
|
ip[1] += DOT(disp,v->vvec)/((1. + d)*sqrt(v->vn2)); |
| 306 |
< |
return; |
| 306 |
> |
goto gotall; |
| 307 |
> |
default: |
| 308 |
> |
return(VL_BAD); |
| 309 |
|
} |
| 310 |
|
ip[0] = DOT(disp,v->hvec)/v->hn2 + 0.5 - v->hoff; |
| 311 |
|
ip[1] = DOT(disp,v->vvec)/v->vn2 + 0.5 - v->voff; |
| 312 |
+ |
gotall: /* add appropriate return flags */ |
| 313 |
+ |
if (ip[2] <= 0.0) |
| 314 |
+ |
rflags |= VL_BEHIND; |
| 315 |
+ |
else if ((v->type != VT_PER) & (v->type != VT_CYL)) |
| 316 |
+ |
rflags |= VL_BEYOND*((v->vaft > FTINY) & |
| 317 |
+ |
(ip[2] >= v->vaft - v->vfore)); |
| 318 |
+ |
rflags |= VL_OUTSIDE*((0.0 >= ip[0]) | (ip[0] >= 1.0) | |
| 319 |
+ |
(0.0 >= ip[1]) | (ip[1] >= 1.0)); |
| 320 |
+ |
return(rflags); |
| 321 |
|
} |
| 322 |
|
|
| 323 |
|
|
| 381 |
|
char *av[] |
| 382 |
|
) |
| 383 |
|
{ |
| 384 |
< |
#define check(c,l) if ((av[0][c]&&av[0][c]!=' ') || \ |
| 384 |
> |
#define check(c,l) if ((av[0][c]&&!isspace(av[0][c])) || \ |
| 385 |
|
badarg(ac-1,av+1,l)) return(-1) |
| 386 |
|
|
| 387 |
|
if (ac <= 0 || av[0][0] != '-' || av[0][1] != 'v') |
| 388 |
|
return(-1); |
| 389 |
|
switch (av[0][2]) { |
| 390 |
|
case 't': /* type */ |
| 391 |
< |
if (!av[0][3] || av[0][3]==' ') |
| 391 |
> |
if (!av[0][3] || isspace(av[0][3])) |
| 392 |
|
return(-1); |
| 393 |
|
check(4,""); |
| 394 |
|
v->type = av[0][3]; |
| 509 |
|
sprintf(cp, " -vt%c", vp->type); |
| 510 |
|
cp += strlen(cp); |
| 511 |
|
} |
| 512 |
< |
if (!VEQ(vp->vp,stdview.vp)) { |
| 512 |
> |
if (!VABSEQ(vp->vp,stdview.vp)) { |
| 513 |
|
sprintf(cp, " -vp %.6g %.6g %.6g", |
| 514 |
|
vp->vp[0], vp->vp[1], vp->vp[2]); |
| 515 |
|
cp += strlen(cp); |
| 516 |
|
} |
| 517 |
< |
if (!FEQ(vp->vdist,stdview.vdist) || !VEQ(vp->vdir,stdview.vdir)) { |
| 517 |
> |
if (!FABSEQ(vp->vdist,stdview.vdist) || !VABSEQ(vp->vdir,stdview.vdir)) { |
| 518 |
|
sprintf(cp, " -vd %.6g %.6g %.6g", |
| 519 |
|
vp->vdir[0]*vp->vdist, |
| 520 |
|
vp->vdir[1]*vp->vdist, |
| 521 |
|
vp->vdir[2]*vp->vdist); |
| 522 |
|
cp += strlen(cp); |
| 523 |
|
} |
| 524 |
< |
if (!VEQ(vp->vup,stdview.vup)) { |
| 524 |
> |
if (!VABSEQ(vp->vup,stdview.vup)) { |
| 525 |
|
sprintf(cp, " -vu %.6g %.6g %.6g", |
| 526 |
|
vp->vup[0], vp->vup[1], vp->vup[2]); |
| 527 |
|
cp += strlen(cp); |
| 528 |
|
} |
| 529 |
< |
if (!FEQ(vp->horiz,stdview.horiz)) { |
| 529 |
> |
if (!FABSEQ(vp->horiz,stdview.horiz)) { |
| 530 |
|
sprintf(cp, " -vh %.6g", vp->horiz); |
| 531 |
|
cp += strlen(cp); |
| 532 |
|
} |
| 533 |
< |
if (!FEQ(vp->vert,stdview.vert)) { |
| 533 |
> |
if (!FABSEQ(vp->vert,stdview.vert)) { |
| 534 |
|
sprintf(cp, " -vv %.6g", vp->vert); |
| 535 |
|
cp += strlen(cp); |
| 536 |
|
} |
| 537 |
< |
if (!FEQ(vp->vfore,stdview.vfore)) { |
| 537 |
> |
if (!FABSEQ(vp->vfore,stdview.vfore)) { |
| 538 |
|
sprintf(cp, " -vo %.6g", vp->vfore); |
| 539 |
|
cp += strlen(cp); |
| 540 |
|
} |
| 541 |
< |
if (!FEQ(vp->vaft,stdview.vaft)) { |
| 541 |
> |
if (!FABSEQ(vp->vaft,stdview.vaft)) { |
| 542 |
|
sprintf(cp, " -va %.6g", vp->vaft); |
| 543 |
|
cp += strlen(cp); |
| 544 |
|
} |
| 545 |
< |
if (!FEQ(vp->hoff,stdview.hoff)) { |
| 545 |
> |
if (!FABSEQ(vp->hoff,stdview.hoff)) { |
| 546 |
|
sprintf(cp, " -vs %.6g", vp->hoff); |
| 547 |
|
cp += strlen(cp); |
| 548 |
|
} |
| 549 |
< |
if (!FEQ(vp->voff,stdview.voff)) { |
| 549 |
> |
if (!FABSEQ(vp->voff,stdview.voff)) { |
| 550 |
|
sprintf(cp, " -vl %.6g", vp->voff); |
| 551 |
|
cp += strlen(cp); |
| 552 |
|
} |
| 573 |
|
} |
| 574 |
|
/* skip leading path */ |
| 575 |
|
cp = s; |
| 576 |
< |
while (*cp && *cp != ' ') |
| 576 |
> |
while (*cp && !isspace(*cp)) |
| 577 |
|
cp++; |
| 578 |
|
while (cp > s && !ISDIRSEP(cp[-1])) |
| 579 |
|
cp--; |
| 625 |
|
if (rp != NULL && !fgetsresolu(rp, fp)) |
| 626 |
|
mvs.ok = 0; |
| 627 |
|
|
| 628 |
< |
fclose(fp); |
| 628 |
> |
if (fp != stdin) |
| 629 |
> |
fclose(fp); |
| 630 |
|
|
| 631 |
|
return(mvs.ok); |
| 632 |
|
} |
