18 |
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19 |
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#include "random.h" |
20 |
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|
21 |
+ |
#ifndef WFLUSH |
22 |
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#define WFLUSH 30 /* flush after this many rays */ |
23 |
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#endif |
24 |
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|
25 |
+ |
|
26 |
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getrect(s, r) /* get a box */ |
27 |
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char *s; |
28 |
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register RECT *r; |
93 |
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(*dev->comout)("Pick view center\n"); |
94 |
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if ((*dev->getcur)(&x, &y) == ABORT) |
95 |
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return(-1); |
96 |
< |
viewray(thisray.rorg, thisray.rdir, &ourview, |
97 |
< |
(x+.5)/hresolu, (y+.5)/vresolu); |
96 |
> |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
97 |
> |
(x+.5)/hresolu, (y+.5)/vresolu) < 0) { |
98 |
> |
error(COMMAND, "not on image"); |
99 |
> |
return(-1); |
100 |
> |
} |
101 |
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if (!direc || ourview.type == VT_PAR) { |
102 |
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rayorigin(&thisray, NULL, PRIMARY, 1.0); |
103 |
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if (!localhit(&thisray, &thescene)) { |
137 |
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register PNODE *p; |
138 |
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int xmin, ymin, xmax, ymax; |
139 |
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{ |
140 |
+ |
extern long nrays; |
141 |
+ |
static long lastflush = 0; |
142 |
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static RAY thisray; |
143 |
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double h, v; |
135 |
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register int i; |
144 |
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|
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if (xmax - xmin <= 0 || ymax - ymin <= 0) { /* empty */ |
146 |
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p->x = xmin; |
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return; |
150 |
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} |
151 |
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/* jitter ray direction */ |
152 |
< |
p->x = h = xmin + (xmax-xmin)*frandom(); |
153 |
< |
h /= hresolu; |
146 |
< |
p->y = v = ymin + (ymax-ymin)*frandom(); |
147 |
< |
v /= vresolu; |
152 |
> |
h = xmin + (xmax-xmin)*frandom(); |
153 |
> |
v = ymin + (ymax-ymin)*frandom(); |
154 |
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|
155 |
< |
viewray(thisray.rorg, thisray.rdir, &ourview, h, v); |
155 |
> |
if (viewray(thisray.rorg, thisray.rdir, &ourview, |
156 |
> |
h/hresolu, v/vresolu) < 0) { |
157 |
> |
setcolor(thisray.rcol, 0.0, 0.0, 0.0); |
158 |
> |
} else { |
159 |
> |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
160 |
> |
samplendx++; |
161 |
> |
rayvalue(&thisray); |
162 |
> |
} |
163 |
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|
164 |
< |
rayorigin(&thisray, NULL, PRIMARY, 1.0); |
165 |
< |
|
153 |
< |
rayvalue(&thisray); |
154 |
< |
|
164 |
> |
p->x = h; |
165 |
> |
p->y = v; |
166 |
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copycolor(p->v, thisray.rcol); |
156 |
– |
|
167 |
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scalecolor(p->v, exposure); |
168 |
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|
169 |
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(*dev->paintr)(greyscale?greyof(p->v):p->v, xmin, ymin, xmax, ymax); |
170 |
+ |
|
171 |
+ |
if (dev->flush != NULL && nrays - lastflush >= WFLUSH) { |
172 |
+ |
lastflush = nrays; |
173 |
+ |
(*dev->flush)(); |
174 |
+ |
} |
175 |
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} |
176 |
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|
177 |
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|
179 |
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{ |
180 |
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/* free old image */ |
181 |
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freepkids(&ptrunk); |
182 |
+ |
/* save reserve memory */ |
183 |
+ |
fillreserves(); |
184 |
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/* compute resolution */ |
185 |
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hresolu = dev->xsiz; |
186 |
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vresolu = dev->ysiz; |
366 |
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} else if (bcmp((char *)vp, (char *)&ourview, sizeof(VIEW))) { |
367 |
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copystruct(&oldview, &ourview); |
368 |
|
copystruct(&ourview, vp); |
369 |
< |
newimage(); /* newimage() calls with vp=&ourview! */ |
369 |
> |
newimage(); |
370 |
|
} |
371 |
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} |
372 |
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|
406 |
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} |
407 |
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|
408 |
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|
409 |
< |
spinvector(vres, vorig, vnorm, theta) /* rotate vector around normal */ |
410 |
< |
FVECT vres, vorig, vnorm; |
411 |
< |
double theta; |
409 |
> |
zoomview(vp, zf) /* zoom in our out */ |
410 |
> |
register VIEW *vp; |
411 |
> |
double zf; |
412 |
|
{ |
413 |
< |
extern double sin(), cos(); |
414 |
< |
double sint, cost, dotp; |
415 |
< |
FVECT vperp; |
416 |
< |
register int i; |
417 |
< |
|
401 |
< |
if (theta == 0.0) { |
402 |
< |
VCOPY(vres, vorig); |
413 |
> |
switch (vp->type) { |
414 |
> |
case VT_PAR: /* parallel view */ |
415 |
> |
case VT_ANG: /* angular fisheye */ |
416 |
> |
vp->horiz /= zf; |
417 |
> |
vp->vert /= zf; |
418 |
|
return; |
419 |
+ |
case VT_PER: /* perspective view */ |
420 |
+ |
vp->horiz = atan(tan(vp->horiz*(PI/180./2.))/zf) / |
421 |
+ |
(PI/180./2.); |
422 |
+ |
vp->vert = atan(tan(vp->vert*(PI/180./2.))/zf) / |
423 |
+ |
(PI/180./2.); |
424 |
+ |
return; |
425 |
+ |
case VT_HEM: /* hemispherical fisheye */ |
426 |
+ |
vp->horiz = sin(vp->horiz*(PI/180./2.))/zf; |
427 |
+ |
if (vp->horiz >= 1.0-FTINY) |
428 |
+ |
vp->horiz = 180.; |
429 |
+ |
else |
430 |
+ |
vp->horiz = asin(vp->horiz) / (PI/180./2.); |
431 |
+ |
vp->vert = sin(vp->vert*(PI/180./2.))/zf; |
432 |
+ |
if (vp->vert >= 1.0-FTINY) |
433 |
+ |
vp->vert = 180.; |
434 |
+ |
else |
435 |
+ |
vp->vert = asin(vp->vert) / (PI/180./2.); |
436 |
+ |
return; |
437 |
|
} |
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; |
438 |
|
} |