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)) { |
158 |
|
h = xmin + (xmax-xmin)*frandom(); |
159 |
|
v = ymin + (ymax-ymin)*frandom(); |
160 |
|
|
161 |
< |
viewray(thisray.rorg, thisray.rdir, &ourview, h/hresolu, v/vresolu); |
162 |
< |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
163 |
< |
rayvalue(&thisray); |
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 |
|
p->x = h; |
171 |
|
p->y = v; |
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; |
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 |
< |
|
408 |
< |
if (theta == 0.0) { |
409 |
< |
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 |
|
} |
412 |
– |
sint = sin(theta); |
413 |
– |
cost = cos(theta); |
414 |
– |
dotp = DOT(vorig, vnorm); |
415 |
– |
fcross(vperp, vnorm, vorig); |
416 |
– |
for (i = 0; i < 3; i++) |
417 |
– |
vres[i] = vnorm[i]*dotp*(1.-cost) + |
418 |
– |
vorig[i]*cost + vperp[i]*sint; |
444 |
|
} |