| 18 |
|
|
| 19 |
|
#include "random.h" |
| 20 |
|
|
| 21 |
+ |
#ifndef WFLUSH |
| 22 |
+ |
#define WFLUSH 30 /* flush after this many rays */ |
| 23 |
+ |
#endif |
| 24 |
|
|
| 25 |
+ |
#ifdef SMLFLT |
| 26 |
+ |
#define sscanvec(s,v) (sscanf(s,"%f %f %f",v,v+1,v+2)==3) |
| 27 |
+ |
#else |
| 28 |
+ |
#define sscanvec(s,v) (sscanf(s,"%lf %lf %lf",v,v+1,v+2)==3) |
| 29 |
+ |
#endif |
| 30 |
+ |
|
| 31 |
+ |
|
| 32 |
|
getrect(s, r) /* get a box */ |
| 33 |
|
char *s; |
| 34 |
|
register RECT *r; |
| 93 |
|
error(COMMAND, "illegal magnification"); |
| 94 |
|
return(-1); |
| 95 |
|
} |
| 96 |
< |
if (sscanf(s, "%*lf %lf %lf %lf", &vec[0], &vec[1], &vec[2]) != 3) { |
| 96 |
> |
if (!sscanvec(sskip(s), vec)) { |
| 97 |
|
if (dev->getcur == NULL) |
| 98 |
|
return(-1); |
| 99 |
|
(*dev->comout)("Pick view center\n"); |
| 100 |
|
if ((*dev->getcur)(&x, &y) == ABORT) |
| 101 |
|
return(-1); |
| 102 |
< |
viewray(thisray.rorg, thisray.rdir, &ourview, |
| 103 |
< |
(x+.5)/hresolu, (y+.5)/vresolu); |
| 102 |
> |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
| 103 |
> |
(x+.5)/hresolu, (y+.5)/vresolu) < 0) { |
| 104 |
> |
error(COMMAND, "not on image"); |
| 105 |
> |
return(-1); |
| 106 |
> |
} |
| 107 |
|
if (!direc || ourview.type == VT_PAR) { |
| 108 |
|
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 109 |
|
if (!localhit(&thisray, &thescene)) { |
| 143 |
|
register PNODE *p; |
| 144 |
|
int xmin, ymin, xmax, ymax; |
| 145 |
|
{ |
| 146 |
+ |
extern long nrays; |
| 147 |
+ |
static long lastflush = 0; |
| 148 |
|
static RAY thisray; |
| 149 |
|
double h, v; |
| 135 |
– |
register int i; |
| 150 |
|
|
| 151 |
|
if (xmax - xmin <= 0 || ymax - ymin <= 0) { /* empty */ |
| 152 |
|
p->x = xmin; |
| 155 |
|
return; |
| 156 |
|
} |
| 157 |
|
/* jitter ray direction */ |
| 158 |
< |
p->x = h = xmin + (xmax-xmin)*frandom(); |
| 159 |
< |
h /= hresolu; |
| 146 |
< |
p->y = v = ymin + (ymax-ymin)*frandom(); |
| 147 |
< |
v /= vresolu; |
| 158 |
> |
h = xmin + (xmax-xmin)*frandom(); |
| 159 |
> |
v = ymin + (ymax-ymin)*frandom(); |
| 160 |
|
|
| 161 |
< |
viewray(thisray.rorg, thisray.rdir, &ourview, h, v); |
| 161 |
> |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
| 162 |
> |
h/hresolu, v/vresolu) < 0) { |
| 163 |
> |
setcolor(thisray.rcol, 0.0, 0.0, 0.0); |
| 164 |
> |
} else { |
| 165 |
> |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 166 |
> |
samplendx++; |
| 167 |
> |
rayvalue(&thisray); |
| 168 |
> |
} |
| 169 |
|
|
| 170 |
< |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
| 171 |
< |
|
| 153 |
< |
rayvalue(&thisray); |
| 154 |
< |
|
| 170 |
> |
p->x = h; |
| 171 |
> |
p->y = v; |
| 172 |
|
copycolor(p->v, thisray.rcol); |
| 156 |
– |
|
| 173 |
|
scalecolor(p->v, exposure); |
| 174 |
|
|
| 175 |
|
(*dev->paintr)(greyscale?greyof(p->v):p->v, xmin, ymin, xmax, ymax); |
| 176 |
+ |
|
| 177 |
+ |
if (dev->flush != NULL && nrays - lastflush >= WFLUSH) { |
| 178 |
+ |
lastflush = nrays; |
| 179 |
+ |
(*dev->flush)(); |
| 180 |
+ |
} |
| 181 |
|
} |
| 182 |
|
|
| 183 |
|
|
| 185 |
|
{ |
| 186 |
|
/* free old image */ |
| 187 |
|
freepkids(&ptrunk); |
| 188 |
+ |
/* save reserve memory */ |
| 189 |
+ |
fillreserves(); |
| 190 |
|
/* compute resolution */ |
| 191 |
|
hresolu = dev->xsiz; |
| 192 |
|
vresolu = dev->ysiz; |
| 372 |
|
} else if (bcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
| 373 |
|
copystruct(&oldview, &ourview); |
| 374 |
|
copystruct(&ourview, vp); |
| 375 |
< |
newimage(); /* newimage() calls with vp=&ourview! */ |
| 375 |
> |
newimage(); |
| 376 |
|
} |
| 377 |
|
} |
| 378 |
|
|
| 412 |
|
} |
| 413 |
|
|
| 414 |
|
|
| 415 |
< |
spinvector(vres, vorig, vnorm, theta) /* rotate vector around normal */ |
| 416 |
< |
FVECT vres, vorig, vnorm; |
| 417 |
< |
double theta; |
| 415 |
> |
zoomview(vp, zf) /* zoom in our out */ |
| 416 |
> |
register VIEW *vp; |
| 417 |
> |
double zf; |
| 418 |
|
{ |
| 419 |
< |
extern double sin(), cos(); |
| 420 |
< |
double sint, cost, dotp; |
| 421 |
< |
FVECT vperp; |
| 422 |
< |
register int i; |
| 423 |
< |
|
| 401 |
< |
if (theta == 0.0) { |
| 402 |
< |
VCOPY(vres, vorig); |
| 419 |
> |
switch (vp->type) { |
| 420 |
> |
case VT_PAR: /* parallel view */ |
| 421 |
> |
case VT_ANG: /* angular fisheye */ |
| 422 |
> |
vp->horiz /= zf; |
| 423 |
> |
vp->vert /= zf; |
| 424 |
|
return; |
| 425 |
+ |
case VT_PER: /* perspective view */ |
| 426 |
+ |
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
| 427 |
+ |
(PI/180./2.); |
| 428 |
+ |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / |
| 429 |
+ |
(PI/180./2.); |
| 430 |
+ |
return; |
| 431 |
+ |
case VT_HEM: /* hemispherical fisheye */ |
| 432 |
+ |
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf; |
| 433 |
+ |
if (vp->horiz >= 1.0-FTINY) |
| 434 |
+ |
vp->horiz = 180.; |
| 435 |
+ |
else |
| 436 |
+ |
vp->horiz = asin(vp->horiz) / (PI/180./2.); |
| 437 |
+ |
vp->vert = sin(vp->vert*(PI/180./2.))/zf; |
| 438 |
+ |
if (vp->vert >= 1.0-FTINY) |
| 439 |
+ |
vp->vert = 180.; |
| 440 |
+ |
else |
| 441 |
+ |
vp->vert = asin(vp->vert) / (PI/180./2.); |
| 442 |
+ |
return; |
| 443 |
|
} |
| 405 |
– |
sint = sin(theta); |
| 406 |
– |
cost = cos(theta); |
| 407 |
– |
dotp = DOT(vorig, vnorm); |
| 408 |
– |
fcross(vperp, vnorm, vorig); |
| 409 |
– |
for (i = 0; i < 3; i++) |
| 410 |
– |
vres[i] = vnorm[i]*dotp*(1.-cost) + |
| 411 |
– |
vorig[i]*cost + vperp[i]*sint; |
| 444 |
|
} |
