20 |
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#define NVSAMPS 16384 /* number of ray samples per view */ |
21 |
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#endif |
22 |
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#ifndef MEYERNG |
23 |
< |
#define MEYERNG 0.1 /* target mean eye range (rel. to grid) */ |
23 |
> |
#define MEYERNG 0.2 /* target mean eye range (rel. to grid) */ |
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#endif |
25 |
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#ifndef MAXTODO |
26 |
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#define MAXTODO 3 /* maximum sections to look at */ |
178 |
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} |
179 |
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|
180 |
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|
181 |
< |
int |
181 |
> |
static int |
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comptodo(tdl, vw) /* compute holodeck sections in view */ |
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int tdl[MAXTODO+1]; |
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VIEW *vw; |
221 |
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} |
222 |
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|
223 |
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|
224 |
< |
addview(hd, vw, hres, vres) /* add view for section */ |
224 |
> |
int |
225 |
> |
addview(hd, vw, rad, hres, vres) /* add view for section */ |
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int hd; |
227 |
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VIEW *vw; |
228 |
+ |
double rad; |
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int hres, vres; |
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{ |
231 |
< |
int sampquant; |
231 |
> |
int sampquant, samptot = 0; |
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int h, v, shr, svr; |
233 |
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GCOORD gc[2]; |
234 |
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FVECT rorg, rdir; |
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/* intersect sample rays with section */ |
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for (v = svr; v--; ) |
246 |
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for (h = shr; h--; ) { |
247 |
< |
if (viewray(rorg, rdir, vw, (v+frandom())/svr, |
248 |
< |
(h+frandom())/shr) < -FTINY) |
247 |
> |
if (viewray(rorg, rdir, vw, (h+frandom())/shr, |
248 |
> |
(v+frandom())/svr) < -FTINY) |
249 |
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continue; |
250 |
+ |
if (rad > FTINY) { |
251 |
+ |
rorg[0] += (1.-2.*frandom())*rad; |
252 |
+ |
rorg[1] += (1.-2.*frandom())*rad; |
253 |
+ |
rorg[2] += (1.-2.*frandom())*rad; |
254 |
+ |
} |
255 |
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if (hdinter(gc, NULL, NULL, hdlist[hd], rorg, rdir) |
256 |
< |
>= FHUGE) |
256 |
> |
>= 0.99*FHUGE) |
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continue; |
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cbeam[getcbeam(hd,hdbindex(hdlist[hd],gc))].nr += |
259 |
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sampquant; |
260 |
+ |
samptot += sampquant; |
261 |
|
} |
262 |
+ |
return(samptot); |
263 |
|
} |
264 |
|
|
265 |
|
|
277 |
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} |
278 |
|
|
279 |
|
|
280 |
+ |
int * |
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|
beam_view(vn, hr, vr) /* add beam view (if advisable) */ |
282 |
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VIEW *vn; |
283 |
|
int hr, vr; |
284 |
|
{ |
285 |
< |
int todo[MAXTODO+1], n; |
286 |
< |
double hdgsiz, d; |
285 |
> |
static int todo[MAXTODO+1]; |
286 |
> |
int n; |
287 |
> |
double er, eravg, d; |
288 |
|
register HOLO *hp; |
289 |
|
register int i; |
290 |
< |
/* sort our list */ |
290 |
> |
/* find nearby sections */ |
291 |
> |
if (!(n = comptodo(todo, vn))) |
292 |
> |
return(NULL); |
293 |
> |
/* sort current beam list */ |
294 |
|
cbeamsort(1); |
295 |
|
/* add view to nearby sections */ |
296 |
< |
if (!(n = comptodo(todo, vn))) |
283 |
< |
return(0); |
284 |
< |
for (i = 0; i < n; i++) |
285 |
< |
addview(todo[i], vn, hr, vr); |
286 |
< |
if (MEYERNG <= FTINY || vn->type == VT_PAR) |
287 |
< |
return(1); |
288 |
< |
hdgsiz = 0.; /* compute mean grid size */ |
296 |
> |
eravg = 0.; |
297 |
|
for (i = 0; i < n; i++) { |
298 |
|
hp = hdlist[todo[i]]; |
299 |
< |
hdgsiz += 1./3. / VLEN(hp->wg[0]) + |
300 |
< |
1./3. / VLEN(hp->wg[1]) + |
301 |
< |
1./3. / VLEN(hp->wg[2]) ; |
299 |
> |
if (MEYERNG > FTINY) |
300 |
> |
er = MEYERNG/3. / VLEN(hp->wg[0]) + |
301 |
> |
MEYERNG/3. / VLEN(hp->wg[1]) + |
302 |
> |
MEYERNG/3. / VLEN(hp->wg[2]) ; |
303 |
> |
else |
304 |
> |
er = 0.; |
305 |
> |
if (!addview(todo[i], vn, 0.25*er, hr, vr)) { |
306 |
> |
register int j; /* whoops! */ |
307 |
> |
n--; /* delete from list */ |
308 |
> |
for (j = i--; j <= n; j++) |
309 |
> |
todo[j] = todo[j+1]; |
310 |
> |
} else |
311 |
> |
eravg += er; |
312 |
|
} |
313 |
< |
hdgsiz /= (double)n; |
313 |
> |
if (eravg <= FTINY) |
314 |
> |
return(todo); |
315 |
> |
/* compute average eye range */ |
316 |
> |
eravg /= (double)n; |
317 |
|
/* add to current eye position */ |
318 |
|
if (cureye.rng <= FTINY) { |
319 |
|
VCOPY(cureye.vpt, vn->vp); |
320 |
< |
cureye.rng = MEYERNG * hdgsiz; |
321 |
< |
} else if ((d = sqrt(dist2(vn->vp,cureye.vpt))) + MEYERNG*hdgsiz > |
301 |
< |
cureye.rng) { |
320 |
> |
cureye.rng = eravg; |
321 |
> |
} else if ((d = sqrt(dist2(vn->vp,cureye.vpt))) + eravg > cureye.rng) { |
322 |
|
for (i = 3; i--; ) |
323 |
|
cureye.vpt[i] = 0.5*(cureye.vpt[i] + vn->vp[i]); |
324 |
< |
cureye.rng = 0.5*(cureye.rng + MEYERNG*hdgsiz + d); |
324 |
> |
cureye.rng = 0.5*(cureye.rng + eravg + d); |
325 |
|
} |
326 |
< |
return(1); |
326 |
> |
return(todo); |
327 |
|
} |
328 |
|
|
329 |
|
|