1 |
< |
/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
1 |
> |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
2 |
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|
3 |
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#ifndef lint |
4 |
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static char SCCSid[] = "$SunId$ SGI"; |
11 |
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#include "rholo.h" |
12 |
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#include "rhdisp.h" |
13 |
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#include "rhdriver.h" |
14 |
+ |
#include "random.h" |
15 |
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|
16 |
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#ifndef MAXDIST |
17 |
< |
#define MAXDIST 13 /* maximum distance outside section */ |
17 |
> |
#define MAXDIST 42 /* maximum distance outside section */ |
18 |
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#endif |
19 |
+ |
#ifndef NVSAMPS |
20 |
+ |
#define NVSAMPS 16384 /* number of ray samples per view */ |
21 |
+ |
#endif |
22 |
+ |
#ifndef MEYERNG |
23 |
+ |
#define MEYERNG 0.2 /* target mean eye range (rel. to grid) */ |
24 |
+ |
#endif |
25 |
+ |
#ifndef MAXTODO |
26 |
+ |
#define MAXTODO 3 /* maximum sections to look at */ |
27 |
+ |
#endif |
28 |
+ |
#ifndef MAXDRAT |
29 |
+ |
#define MAXDRAT 3.0 /* maximum distance ratio btwn. cand. sect. */ |
30 |
+ |
#endif |
31 |
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|
19 |
– |
extern GCOORD *getviewcells(); |
20 |
– |
|
21 |
– |
static VIEW dvw; /* current view corresponding to beam list */ |
22 |
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|
23 |
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typedef struct { |
24 |
– |
int hd; /* holodeck section number (-1 if inactive) */ |
25 |
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int i[3]; /* voxel index (may be outside section) */ |
26 |
– |
} VOXL; /* a voxel */ |
27 |
– |
|
28 |
– |
static VOXL voxel[8] = { /* current voxel list */ |
29 |
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{-1}, {-1}, {-1}, {-1}, |
30 |
– |
{-1}, {-1}, {-1}, {-1} |
31 |
– |
}; |
32 |
– |
|
32 |
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#define CBEAMBLK 1024 /* cbeam allocation block size */ |
33 |
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|
34 |
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static struct beamcomp { |
35 |
< |
short wants; /* flags telling which voxels want us */ |
37 |
< |
short hd; /* holodeck section number */ |
35 |
> |
int hd; /* holodeck section number */ |
36 |
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int bi; /* beam index */ |
37 |
+ |
int4 nr; /* number of samples desired */ |
38 |
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} *cbeam = NULL; /* current beam list */ |
39 |
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|
40 |
+ |
VIEWPOINT cureye; /* current eye position */ |
41 |
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|
42 |
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static int ncbeams = 0; /* number of sorted beams in cbeam */ |
43 |
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static int xcbeams = 0; /* extra (unregistered) beams past ncbeams */ |
44 |
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static int maxcbeam = 0; /* size of cbeam array */ |
45 |
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|
45 |
– |
struct cellact { |
46 |
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short vi; /* voxel index */ |
47 |
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short add; /* zero means delete */ |
48 |
– |
short rev; /* reverse ray direction? */ |
49 |
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}; /* action for cell */ |
46 |
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|
51 |
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struct beamact { |
52 |
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struct cellact ca; /* cell action */ |
53 |
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GCOORD gc; /* grid coordinate */ |
54 |
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}; /* beam origin and action */ |
55 |
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|
56 |
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|
47 |
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int |
48 |
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newcbeam() /* allocate new entry at end of cbeam array */ |
49 |
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{ |
82 |
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{ |
83 |
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register int c; |
84 |
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|
85 |
< |
if (!cb1->wants) /* put orphans at the end, unsorted */ |
86 |
< |
return(cb2->wants); |
85 |
> |
if (!cb1->nr) /* put orphans at the end, unsorted */ |
86 |
> |
return(cb2->nr); |
87 |
> |
if (!cb2->nr) |
88 |
> |
return(-1); |
89 |
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if ((c = cb1->bi - cb2->bi)) /* sort on beam index first */ |
90 |
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return(c); |
91 |
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return(cb1->hd - cb2->hd); /* use hd to resolve matches */ |
101 |
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|
102 |
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if (ncbeams <= 0) |
103 |
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return(-1); |
104 |
< |
cb.wants = 0; cb.hd = hd; cb.bi = bi; |
104 |
> |
cb.hd = hd; cb.bi = bi; cb.nr = 0; |
105 |
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p = (struct beamcomp *)bsearch((char *)&cb, (char *)cbeam, ncbeams, |
106 |
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sizeof(struct beamcomp), cbeamcmp); |
107 |
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if (p == NULL) |
129 |
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if (bi < 1 | bi > nbeams(hdlist[hd])) |
130 |
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error(INTERNAL, "illegal beam index in getcbeam"); |
131 |
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n = newcbeam(); /* allocate and assign */ |
132 |
< |
cbeam[n].wants = 0; cbeam[n].hd = hd; cbeam[n].bi = bi; |
132 |
> |
cbeam[n].nr = 0; cbeam[n].hd = hd; cbeam[n].bi = bi; |
133 |
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return(n); |
134 |
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} |
135 |
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|
147 |
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if (adopt) |
148 |
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return; |
149 |
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for (i = ncbeams; i--; ) /* identify orphans */ |
150 |
< |
if (cbeam[i].wants) |
150 |
> |
if (cbeam[i].nr) |
151 |
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break; |
152 |
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xcbeams = ncbeams - ++i; /* put orphans after ncbeams */ |
153 |
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ncbeams = i; |
154 |
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} |
155 |
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|
156 |
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|
157 |
< |
cbeamadj(v, hr, vr) /* adjust our beam list */ |
166 |
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VIEW *v; |
167 |
< |
int hr, vr; |
168 |
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{ |
169 |
< |
register PACKHEAD *pa; |
170 |
< |
register int i; |
171 |
< |
int n; |
172 |
< |
/* first handle additions */ |
173 |
< |
pa = (PACKHEAD *)malloc(xcbeams*sizeof(PACKHEAD)); |
174 |
< |
if (xcbeams && pa == NULL) |
175 |
< |
goto memerr; |
176 |
< |
for (i = xcbeams; i--; ) { |
177 |
< |
pa[i].hd = cbeam[ncbeams+i].hd; |
178 |
< |
pa[i].bi = cbeam[ncbeams+i].bi; |
179 |
< |
pa[i].nr = npixels(v, hr, vr, hdlist[pa[i].hd], pa[i].bi) + 1; |
180 |
< |
} |
181 |
< |
n = xcbeams; /* now sort list for deletions */ |
182 |
< |
cbeamsort(0); |
183 |
< |
pa = (PACKHEAD *)realloc((char *)pa, (n+xcbeams)*sizeof(PACKHEAD)); |
184 |
< |
if (n+xcbeams && pa == NULL) |
185 |
< |
goto memerr; |
186 |
< |
for (i = xcbeams; i--; ) { |
187 |
< |
pa[n+i].hd = cbeam[ncbeams+i].hd; |
188 |
< |
pa[n+i].bi = cbeam[ncbeams+i].bi; |
189 |
< |
pa[n+i].nr = 0; |
190 |
< |
} |
191 |
< |
n += xcbeams; |
192 |
< |
xcbeams = 0; /* delete orphans */ |
193 |
< |
serv_request(DR_ADJSET, n*sizeof(PACKHEAD), (char *)pa); |
194 |
< |
free((char *)pa); |
195 |
< |
return; |
196 |
< |
memerr: |
197 |
< |
error(SYSTEM, "out of memory in cbeamadj"); |
198 |
< |
} |
199 |
< |
|
200 |
< |
|
201 |
< |
cbeamop(op, bl, n, v, hr, vr) /* update beams on server list */ |
157 |
> |
cbeamop(op, bl, n) /* update beams on server list */ |
158 |
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int op; |
159 |
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register struct beamcomp *bl; |
160 |
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int n; |
205 |
– |
VIEW *v; |
206 |
– |
int hr, vr; |
161 |
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{ |
162 |
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register PACKHEAD *pa; |
163 |
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register int i; |
166 |
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return; |
167 |
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pa = (PACKHEAD *)malloc(n*sizeof(PACKHEAD)); |
168 |
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if (pa == NULL) |
169 |
< |
error(SYSTEM, "out of memory in cbeamadd"); |
169 |
> |
error(SYSTEM, "out of memory in cbeamop"); |
170 |
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for (i = 0; i < n; i++) { |
171 |
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pa[i].hd = bl[i].hd; |
172 |
|
pa[i].bi = bl[i].bi; |
173 |
< |
pa[i].nr = v==NULL ? 0 : |
174 |
< |
npixels(v, hr, vr, hdlist[bl[i].hd], bl[i].bi); |
173 |
> |
pa[i].nr = bl[i].nr; |
174 |
> |
pa[i].nc = 0; |
175 |
|
} |
176 |
|
serv_request(op, n*sizeof(PACKHEAD), (char *)pa); |
177 |
|
free((char *)pa); |
178 |
|
} |
179 |
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|
180 |
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|
181 |
< |
int |
182 |
< |
set_voxels(vl, n) /* set new voxel array */ |
183 |
< |
VOXL vl[8]; |
184 |
< |
int n; |
181 |
> |
static int |
182 |
> |
comptodo(tdl, vw) /* compute holodeck sections in view */ |
183 |
> |
int tdl[MAXTODO+1]; |
184 |
> |
VIEW *vw; |
185 |
|
{ |
232 |
– |
short wmap[256]; |
233 |
– |
int vmap[8]; |
234 |
– |
int comn = 0; |
235 |
– |
int no; |
236 |
– |
register int i, j; |
237 |
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/* find common voxels */ |
238 |
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for (j = 0; j < 8 && voxel[j].hd >= 0; j++) { |
239 |
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vmap[j] = -1; |
240 |
– |
for (i = n; i--; ) |
241 |
– |
if (!bcmp((char *)(vl+i), (char *)(voxel+j), |
242 |
– |
sizeof(VOXL))) { |
243 |
– |
vmap[j] = i; |
244 |
– |
comn |= 1<<i; |
245 |
– |
break; |
246 |
– |
} |
247 |
– |
} |
248 |
– |
no = comn ? j : 0; /* compute flag mapping */ |
249 |
– |
for (i = 256; i--; ) { |
250 |
– |
wmap[i] = 0; |
251 |
– |
for (j = no; j--; ) |
252 |
– |
if (vmap[j] >= 0 && i & 1<<j) |
253 |
– |
wmap[i] |= 1<<vmap[j]; |
254 |
– |
} |
255 |
– |
/* fix cbeam flags */ |
256 |
– |
for (i = ncbeams; i--; ) |
257 |
– |
cbeam[i].wants = wmap[cbeam[i].wants]; |
258 |
– |
/* update our voxel list */ |
259 |
– |
bcopy((char *)vl, (char *)voxel, n*sizeof(VOXL)); |
260 |
– |
for (j = n; j < 8; j++) |
261 |
– |
voxel[j].hd = -1; |
262 |
– |
return(comn); /* return bit array of common voxels */ |
263 |
– |
} |
264 |
– |
|
265 |
– |
|
266 |
– |
int |
267 |
– |
get_voxels(vl, vp) /* find voxels corresponding to view point */ |
268 |
– |
VOXL vl[8]; |
269 |
– |
FVECT vp; |
270 |
– |
{ |
271 |
– |
static int lastn = 0, lastd = -1; |
186 |
|
int n = 0; |
187 |
< |
FVECT gp; |
188 |
< |
double d; |
189 |
< |
int dist, bestd = 0x7fff; |
190 |
< |
VOXL vox; |
191 |
< |
register int i, j, k; |
192 |
< |
/* find closest voxels */ |
193 |
< |
for (i = 0; n < 8 && hdlist[i]; i++) { |
194 |
< |
hdgrid(gp, hdlist[i], vp); |
195 |
< |
for (j = 0; n < 8 && j < 8; j++) { |
196 |
< |
dist = 0; |
197 |
< |
for (k = 0; k < 3; k++) { |
198 |
< |
d = gp[k] - .5 + (j>>k & 1); |
199 |
< |
if (d < 0.) |
200 |
< |
dist += -(vox.i[k] = (int)d - 1); |
201 |
< |
else if ((vox.i[k] = d) >= hdlist[i]->grid[k]) |
202 |
< |
dist += vox.i[k] - |
203 |
< |
hdlist[i]->grid[k] + 1; |
290 |
< |
} |
291 |
< |
if (dist > bestd) /* others were closer */ |
292 |
< |
continue; |
293 |
< |
if (dist < bestd) { /* start closer list */ |
294 |
< |
n = 0; |
295 |
< |
bestd = dist; |
296 |
< |
} |
297 |
< |
vox.hd = i; /* add this voxel */ |
298 |
< |
copystruct(&vl[n], &vox); |
299 |
< |
n++; |
187 |
> |
FVECT gp, dv; |
188 |
> |
double dist2[MAXTODO+1], thisdist2; |
189 |
> |
register int i, j; |
190 |
> |
/* find closest MAXTODO sections */ |
191 |
> |
for (i = 0; hdlist[i]; i++) { |
192 |
> |
hdgrid(gp, hdlist[i], vw->vp); |
193 |
> |
for (j = 0; j < 3; j++) |
194 |
> |
if (gp[j] < 0.) |
195 |
> |
dv[j] = -gp[j]; |
196 |
> |
else if (gp[j] > hdlist[i]->grid[j]) |
197 |
> |
dv[j] = gp[j] - hdlist[i]->grid[j]; |
198 |
> |
else |
199 |
> |
dv[j] = 0.; |
200 |
> |
thisdist2 = DOT(dv,dv); |
201 |
> |
for (j = n; j > 0 && thisdist2 < dist2[j-1]; j--) { |
202 |
> |
tdl[j] = tdl[j-1]; |
203 |
> |
dist2[j] = dist2[j-1]; |
204 |
|
} |
205 |
+ |
tdl[j] = i; |
206 |
+ |
dist2[j] = thisdist2; |
207 |
+ |
if (n < MAXTODO) |
208 |
+ |
n++; |
209 |
|
} |
210 |
< |
/* check for really stupid move */ |
211 |
< |
if (bestd > MAXDIST) { |
210 |
> |
/* watch for bad move */ |
211 |
> |
if (n && dist2[0] > MAXDIST*MAXDIST) { |
212 |
|
error(COMMAND, "move past outer limits"); |
213 |
|
return(0); |
214 |
|
} |
215 |
< |
/* warn of dangerous moves */ |
216 |
< |
if (n < lastn && bestd >= lastd) |
217 |
< |
error(WARNING, "moving outside holodeck section"); |
218 |
< |
else if (n > lastn && bestd <= lastd) |
219 |
< |
error(WARNING, "moving inside holodeck section"); |
220 |
< |
lastd = bestd; |
313 |
< |
return(lastn = n); |
215 |
> |
/* avoid big differences */ |
216 |
> |
for (j = 1; j < n; j++) |
217 |
> |
if (dist2[j] > MAXDRAT*MAXDRAT*dist2[j-1]) |
218 |
> |
n = j; |
219 |
> |
tdl[n] = -1; |
220 |
> |
return(n); |
221 |
|
} |
222 |
|
|
223 |
|
|
224 |
|
int |
225 |
< |
dobeam(gcp, bp) /* express interest or disintrest in a beam */ |
226 |
< |
GCOORD *gcp; |
227 |
< |
register struct beamact *bp; |
225 |
> |
addview(hd, vw, rad, hres, vres) /* add view for section */ |
226 |
> |
int hd; |
227 |
> |
VIEW *vw; |
228 |
> |
double rad; |
229 |
> |
int hres, vres; |
230 |
|
{ |
231 |
+ |
int sampquant, samptot = 0; |
232 |
+ |
int h, v, shr, svr; |
233 |
|
GCOORD gc[2]; |
234 |
< |
int bi, i; |
235 |
< |
/* compute beam index */ |
236 |
< |
if (bp->ca.rev) { |
237 |
< |
copystruct(gc, &bp->gc); |
238 |
< |
copystruct(gc+1, gcp); |
234 |
> |
FVECT rorg, rdir; |
235 |
> |
/* compute sampling grid */ |
236 |
> |
if (hres|vres && hres*vres <= NVSAMPS) { |
237 |
> |
shr = hres; svr = vres; |
238 |
> |
sampquant = 1; |
239 |
|
} else { |
240 |
< |
copystruct(gc, gcp); |
241 |
< |
copystruct(gc+1, &bp->gc); |
240 |
> |
shr = sqrt(NVSAMPS/viewaspect(vw)) + .5; |
241 |
> |
svr = (NVSAMPS + shr/2)/shr; |
242 |
> |
sampquant = (hres*vres + shr*svr/2)/(shr*svr); |
243 |
|
} |
244 |
< |
if ((bi = hdbindex(hdlist[voxel[bp->ca.vi].hd], gc)) <= 0) |
245 |
< |
error(CONSISTENCY, "bad grid coordinate in dobeam"); |
246 |
< |
if (bp->ca.add) { /* add it in */ |
247 |
< |
i = getcbeam(voxel[bp->ca.vi].hd, bi); |
248 |
< |
cbeam[i].wants |= 1<<bp->ca.vi; /* say we want it */ |
249 |
< |
return(i == ncbeams+xcbeams-1); /* return 1 if totally new */ |
250 |
< |
} |
251 |
< |
/* else delete it */ |
252 |
< |
i = findcbeam(voxel[bp->ca.vi].hd, bi); |
253 |
< |
if (i >= 0 && cbeam[i].wants & 1<<bp->ca.vi) { |
254 |
< |
cbeam[i].wants &= ~(1<<bp->ca.vi); /* we don't want it */ |
255 |
< |
return(1); /* indicate change */ |
256 |
< |
} |
257 |
< |
return(0); |
244 |
> |
/* intersect sample rays with section */ |
245 |
> |
for (v = svr; v--; ) |
246 |
> |
for (h = shr; h--; ) { |
247 |
> |
if (viewray(rorg, rdir, vw, (h+frandom())/shr, |
248 |
> |
(v+frandom())/svr) < -FTINY) |
249 |
> |
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 |
> |
if (hdinter(gc, NULL, NULL, hdlist[hd], rorg, rdir) |
256 |
> |
>= 0.99*FHUGE) |
257 |
> |
continue; |
258 |
> |
cbeam[getcbeam(hd,hdbindex(hdlist[hd],gc))].nr += |
259 |
> |
sampquant; |
260 |
> |
samptot += sampquant; |
261 |
> |
} |
262 |
> |
return(samptot); |
263 |
|
} |
264 |
|
|
265 |
|
|
266 |
< |
|
267 |
< |
int |
351 |
< |
docell(gcp, cap) /* find beams corresponding to cell and voxel */ |
352 |
< |
GCOORD *gcp; |
353 |
< |
register struct cellact *cap; |
266 |
> |
beam_init(fresh) /* clear beam list for new view(s) */ |
267 |
> |
int fresh; |
268 |
|
{ |
355 |
– |
register HOLO *hp = hdlist[voxel[cap->vi].hd]; |
356 |
– |
FVECT org, dir[4]; |
357 |
– |
FVECT vgp, cgp, vc; |
358 |
– |
FVECT v1, v2; |
359 |
– |
struct beamact bo; |
360 |
– |
int axmax, j; |
361 |
– |
double d, avmax; |
269 |
|
register int i; |
363 |
– |
/* compute cell center */ |
364 |
– |
cgp[gcp->w>>1] = gcp->w&1 ? hp->grid[gcp->w>>1] : 0 ; |
365 |
– |
cgp[((gcp->w>>1)+1)%3] = gcp->i[0] + .5; |
366 |
– |
cgp[((gcp->w>>1)+2)%3] = gcp->i[1] + .5; |
367 |
– |
hdworld(org, hp, cgp); |
368 |
– |
/* compute direction to voxel center */ |
369 |
– |
for (i = 3; i--; ) |
370 |
– |
vgp[i] = voxel[cap->vi].i[i] + .5; |
371 |
– |
hdworld(vc, hp, vgp); |
372 |
– |
for (i = 3; i--; ) |
373 |
– |
vc[i] -= org[i]; |
374 |
– |
/* compute maximum area axis */ |
375 |
– |
axmax = -1; avmax = 0; |
376 |
– |
for (i = 3; i--; ) { |
377 |
– |
d = vgp[i] - cgp[i]; |
378 |
– |
if (d < 0.) d = -d; |
379 |
– |
if (d > avmax) { |
380 |
– |
avmax = d; |
381 |
– |
axmax = i; |
382 |
– |
} |
383 |
– |
} |
384 |
– |
#ifdef DEBUG |
385 |
– |
if (axmax < 0.) |
386 |
– |
error(CONSISTENCY, "botched axis computation in docell"); |
387 |
– |
#endif |
388 |
– |
/* compute offset vectors */ |
389 |
– |
d = 0.5/hp->grid[j=(axmax+1)%3]; |
390 |
– |
for (i = 3; i--; ) |
391 |
– |
v1[i] = hp->xv[j][i] * d; |
392 |
– |
d = 0.5/hp->grid[j=(axmax+2)%3]; |
393 |
– |
if (DOT(hp->wn[axmax], vc) < 0.) |
394 |
– |
d = -d; /* reverse vertex ordering */ |
395 |
– |
for (i = 3; i--; ) |
396 |
– |
v2[i] = hp->xv[j][i] * d; |
397 |
– |
/* compute voxel pyramid */ |
398 |
– |
for (i = 3; i--; ) { |
399 |
– |
dir[0][i] = vc[i] - v1[i] - v2[i]; |
400 |
– |
dir[1][i] = vc[i] + v1[i] - v2[i]; |
401 |
– |
dir[2][i] = vc[i] + v1[i] + v2[i]; |
402 |
– |
dir[3][i] = vc[i] - v1[i] + v2[i]; |
403 |
– |
} |
404 |
– |
/* visit beams for opposite cells */ |
405 |
– |
copystruct(&bo.ca, cap); |
406 |
– |
copystruct(&bo.gc, gcp); |
407 |
– |
return(visit_cells(org, dir, hp, dobeam, &bo)); |
408 |
– |
} |
270 |
|
|
271 |
< |
|
272 |
< |
int |
273 |
< |
doview(cap, vp) /* visit cells for a given view */ |
274 |
< |
struct cellact *cap; |
275 |
< |
VIEW *vp; |
276 |
< |
{ |
416 |
< |
int orient; |
417 |
< |
FVECT org, dir[4]; |
418 |
< |
/* compute view pyramid */ |
419 |
< |
orient = viewpyramid(org, dir, hdlist[voxel[cap->vi].hd], vp); |
420 |
< |
if (!orient) |
421 |
< |
error(INTERNAL, "unusable view in doview"); |
422 |
< |
cap->rev = orient < 0; |
423 |
< |
/* visit cells within pyramid */ |
424 |
< |
return(visit_cells(org, dir, hdlist[voxel[cap->vi].hd], docell, cap)); |
271 |
> |
if (fresh) /* discard old beams? */ |
272 |
> |
ncbeams = xcbeams = 0; |
273 |
> |
else /* else clear sample requests */ |
274 |
> |
for (i = ncbeams+xcbeams; i--; ) |
275 |
> |
cbeam[i].nr = 0; |
276 |
> |
cureye.rng = 0.; |
277 |
|
} |
278 |
|
|
279 |
|
|
280 |
< |
mvview(voxi, vold, vnew) /* move view for a voxel */ |
281 |
< |
int voxi; |
282 |
< |
VIEW *vold, *vnew; |
280 |
> |
int * |
281 |
> |
beam_view(vn, hr, vr) /* add beam view (if advisable) */ |
282 |
> |
VIEW *vn; |
283 |
> |
int hr, vr; |
284 |
|
{ |
285 |
< |
int netchange = 0; |
286 |
< |
struct cellact oca, nca; |
287 |
< |
int ocnt, ncnt; |
288 |
< |
int c; |
289 |
< |
GCOORD *ogcl, *ngcl; |
290 |
< |
register GCOORD *ogcp, *ngcp; |
291 |
< |
/* get old and new cell lists */ |
292 |
< |
ogcp = ogcl = getviewcells(&ocnt, hdlist[voxel[voxi].hd], vold); |
293 |
< |
ngcp = ngcl = getviewcells(&ncnt, hdlist[voxel[voxi].hd], vnew); |
294 |
< |
/* set up actions */ |
295 |
< |
oca.vi = nca.vi = voxi; |
296 |
< |
oca.add = 0; nca.add = 1; |
297 |
< |
if ((oca.rev = ocnt < 0)) |
298 |
< |
ocnt = -ocnt; |
299 |
< |
if ((nca.rev = ncnt < 0)) |
300 |
< |
ncnt = -ncnt; |
301 |
< |
if (nca.rev == oca.rev) /* add and delete cells in order */ |
302 |
< |
while (ocnt > 0 & ncnt > 0) |
303 |
< |
if ((c = cellcmp(ogcp, ngcp)) > 0) { /* new cell */ |
304 |
< |
netchange += docell(ngcp++, &nca); |
305 |
< |
ncnt--; |
306 |
< |
} else if (c < 0) { /* old cell */ |
307 |
< |
netchange -= docell(ogcp++, &oca); |
308 |
< |
ocnt--; |
309 |
< |
} else { /* same cell */ |
310 |
< |
ogcp++; ocnt--; |
311 |
< |
ngcp++; ncnt--; |
312 |
< |
} |
313 |
< |
/* take care of list tails */ |
314 |
< |
for ( ; ncnt > 0; ncnt--) |
315 |
< |
netchange += docell(ngcp++, &nca); |
316 |
< |
for ( ; ocnt > 0; ocnt--) |
317 |
< |
netchange -= docell(ogcp++, &oca); |
318 |
< |
/* clean up */ |
319 |
< |
if (ogcl != NULL) free((char *)ogcl); |
320 |
< |
if (ngcl != NULL) free((char *)ngcl); |
321 |
< |
return(netchange); |
285 |
> |
static int todo[MAXTODO+1]; |
286 |
> |
int n; |
287 |
> |
double er, eravg, d; |
288 |
> |
register HOLO *hp; |
289 |
> |
register int i; |
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 |
> |
eravg = 0.; |
297 |
> |
for (i = 0; i < n; i++) { |
298 |
> |
hp = hdlist[todo[i]]; |
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 |
> |
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 = 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 + eravg + d); |
325 |
> |
} |
326 |
> |
return(todo); |
327 |
|
} |
328 |
|
|
329 |
|
|
330 |
|
int |
331 |
< |
beam_sync() /* synchronize beams on server */ |
331 |
> |
beam_sync(all) /* update beam list on server */ |
332 |
> |
int all; |
333 |
|
{ |
334 |
< |
cbeamop(DR_NEWSET, cbeam, ncbeams, &odev.v, odev.hres, odev.vres); |
335 |
< |
return(ncbeams); |
336 |
< |
} |
337 |
< |
|
338 |
< |
|
339 |
< |
beam_view(vn) /* change beam view (if advisable) */ |
340 |
< |
VIEW *vn; |
341 |
< |
{ |
342 |
< |
struct cellact ca; |
484 |
< |
VOXL vlnew[8]; |
485 |
< |
int n, comn; |
486 |
< |
|
487 |
< |
if (!vn->type) { /* clear our beam list */ |
488 |
< |
set_voxels(vlnew, 0); |
489 |
< |
cbeamop(DR_DELSET, cbeam, ncbeams, NULL, 0, 0); |
490 |
< |
ncbeams = 0; |
491 |
< |
copystruct(&dvw, vn); |
492 |
< |
return(1); |
493 |
< |
} |
494 |
< |
/* find our new voxels */ |
495 |
< |
n = get_voxels(vlnew, vn->vp); |
496 |
< |
if (dvw.type && !n) { |
497 |
< |
copystruct(vn, &dvw); /* cancel move */ |
498 |
< |
return(0); |
499 |
< |
} |
500 |
< |
/* set the new voxels */ |
501 |
< |
comn = set_voxels(vlnew, n); |
502 |
< |
if (!dvw.type) |
503 |
< |
comn = 0; |
504 |
< |
ca.add = 1; /* update our beam list */ |
505 |
< |
for (ca.vi = n; ca.vi--; ) |
506 |
< |
if (comn & 1<<ca.vi) /* change which cells we see */ |
507 |
< |
mvview(ca.vi, &dvw, vn); |
508 |
< |
else /* else add all new cells */ |
509 |
< |
doview(&ca, vn); |
510 |
< |
#if 1 |
511 |
< |
cbeamadj(vn, odev.hres, odev.vres); |
512 |
< |
#else |
513 |
< |
/* inform server of new beams */ |
514 |
< |
cbeamop(DR_ADDSET, cbeam+ncbeams, xcbeams, vn, odev.hres, odev.vres); |
515 |
< |
/* sort list to put orphans at end */ |
516 |
< |
cbeamsort(0); |
517 |
< |
/* tell server to delete orphans */ |
518 |
< |
cbeamop(DR_DELSET, cbeam+ncbeams, xcbeams, NULL, 0, 0); |
334 |
> |
/* set new eye position */ |
335 |
> |
serv_request(DR_VIEWPOINT, sizeof(VIEWPOINT), (char *)&cureye); |
336 |
> |
/* sort list (put orphans at end) */ |
337 |
> |
cbeamsort(all < 0); |
338 |
> |
/* send beam request */ |
339 |
> |
if (all) |
340 |
> |
cbeamop(DR_NEWSET, cbeam, ncbeams); |
341 |
> |
else |
342 |
> |
cbeamop(DR_ADJSET, cbeam, ncbeams+xcbeams); |
343 |
|
xcbeams = 0; /* truncate our list */ |
344 |
< |
#endif |
521 |
< |
copystruct(&dvw, vn); /* record new view */ |
522 |
< |
return(1); |
344 |
> |
return(ncbeams); |
345 |
|
} |