1 |
< |
/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
1 |
> |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
2 |
|
|
3 |
|
#ifndef lint |
4 |
|
static char SCCSid[] = "$SunId$ SGI"; |
10 |
|
|
11 |
|
#include "rholo.h" |
12 |
|
|
13 |
– |
|
13 |
|
#define abs(x) ((x) > 0 ? (x) : -(x)) |
14 |
|
#define sgn(x) ((x) > 0 ? 1 : (x) < 0 ? -1 : 0) |
15 |
|
|
16 |
+ |
static PACKHEAD *complist=NULL; /* list of beams to compute */ |
17 |
+ |
static int complen=0; /* length of complist */ |
18 |
+ |
static int listpos=0; /* current list position for next_packet */ |
19 |
+ |
static int lastin= -1; /* last ordered position in list */ |
20 |
|
|
18 |
– |
static PACKHEAD *complist; /* list of beams to compute */ |
19 |
– |
static int complen; /* length of complist */ |
20 |
– |
static int listpos; /* current list position for next_pack */ |
21 |
– |
static int lastin; /* last ordered position in list */ |
21 |
|
|
22 |
+ |
int |
23 |
+ |
beamcmp(b0, b1) /* comparison for descending compute order */ |
24 |
+ |
register PACKHEAD *b0, *b1; |
25 |
+ |
{ |
26 |
+ |
return( b1->nr*(b0->nc+1) - b0->nr*(b1->nc+1) ); |
27 |
+ |
} |
28 |
|
|
29 |
+ |
|
30 |
|
int |
31 |
< |
weightf(hp, x0, x1, x2) /* voxel weighting function */ |
32 |
< |
register HOLO *hp; |
33 |
< |
register int x0, x1, x2; |
31 |
> |
dispbeam(b, hp, bi) /* display a holodeck beam */ |
32 |
> |
register BEAM *b; |
33 |
> |
HOLO *hp; |
34 |
> |
int bi; |
35 |
|
{ |
36 |
< |
switch (vlet(OCCUPANCY)) { |
37 |
< |
case 'U': /* uniform weighting */ |
38 |
< |
return(1); |
39 |
< |
case 'C': /* center weighting (crude) */ |
40 |
< |
x0 += x0 - hp->grid[0] + 1; |
41 |
< |
x0 = abs(x0)*hp->grid[1]*hp->grid[2]; |
42 |
< |
x1 += x1 - hp->grid[1] + 1; |
43 |
< |
x1 = abs(x1)*hp->grid[0]*hp->grid[2]; |
44 |
< |
x2 += x2 - hp->grid[2] + 1; |
45 |
< |
x2 = abs(x2)*hp->grid[0]*hp->grid[1]; |
46 |
< |
return(hp->grid[0]*hp->grid[1]*hp->grid[2] - |
40 |
< |
(x0+x1+x2)/3); |
41 |
< |
default: |
42 |
< |
badvalue(OCCUPANCY); |
36 |
> |
static int n = 0; |
37 |
> |
static PACKHEAD *p = NULL; |
38 |
> |
|
39 |
> |
if (b == NULL) |
40 |
> |
return; |
41 |
> |
if (b->nrm > n) { /* (re)allocate packet holder */ |
42 |
> |
n = b->nrm; |
43 |
> |
if (p == NULL) p = (PACKHEAD *)malloc(packsiz(n)); |
44 |
> |
else p = (PACKHEAD *)realloc((char *)p, packsiz(n)); |
45 |
> |
if (p == NULL) |
46 |
> |
error(SYSTEM, "out of memory in dispbeam"); |
47 |
|
} |
48 |
+ |
/* assign packet fields */ |
49 |
+ |
bcopy((char *)hdbray(b), (char *)packra(p), b->nrm*sizeof(RAYVAL)); |
50 |
+ |
p->nr = p->nc = b->nrm; |
51 |
+ |
for (p->hd = 0; hdlist[p->hd] != hp; p->hd++) |
52 |
+ |
if (hdlist[p->hd] == NULL) |
53 |
+ |
error(CONSISTENCY, "unregistered holodeck in dispbeam"); |
54 |
+ |
p->bi = bi; |
55 |
+ |
disp_packet(p); /* display it */ |
56 |
|
} |
57 |
|
|
58 |
|
|
59 |
< |
/* The following is by Daniel Cohen, taken from Graphics Gems IV, p. 368 */ |
60 |
< |
long |
61 |
< |
lineweight(hp, x, y, z, dx, dy, dz) /* compute weights along a line */ |
62 |
< |
HOLO *hp; |
51 |
< |
int x, y, z, dx, dy, dz; |
59 |
> |
bundle_set(op, clist, nents) /* bundle set operation */ |
60 |
> |
int op; |
61 |
> |
register PACKHEAD *clist; |
62 |
> |
int nents; |
63 |
|
{ |
64 |
< |
long wres = 0; |
54 |
< |
int n, sx, sy, sz, exy, exz, ezy, ax, ay, az, bx, by, bz; |
64 |
> |
register int i, n; |
65 |
|
|
66 |
< |
sx = sgn(dx); sy = sgn(dy); sz = sgn(dz); |
67 |
< |
ax = abs(dx); ay = abs(dy); az = abs(dz); |
68 |
< |
bx = 2*ax; by = 2*ay; bz = 2*az; |
69 |
< |
exy = ay-ax; exz = az-ax; ezy = ay-az; |
70 |
< |
n = ax+ay+az + 1; /* added increment to visit last */ |
71 |
< |
while (n--) { |
72 |
< |
wres += weightf(hp, x, y, z); |
73 |
< |
if (exy < 0) { |
74 |
< |
if (exz < 0) { |
65 |
< |
x += sx; |
66 |
< |
exy += by; exz += bz; |
67 |
< |
} else { |
68 |
< |
z += sz; |
69 |
< |
exz -= bx; ezy += by; |
70 |
< |
} |
71 |
< |
} else { |
72 |
< |
if (ezy < 0) { |
73 |
< |
z += sz; |
74 |
< |
exz -= bx; ezy += by; |
75 |
< |
} else { |
76 |
< |
y += sy; |
77 |
< |
exy -= bx; ezy -= bz; |
78 |
< |
} |
66 |
> |
switch (op) { |
67 |
> |
case BS_NEW: /* new computation set */ |
68 |
> |
if (complen) |
69 |
> |
free((char *)complist); |
70 |
> |
if (nents <= 0) { |
71 |
> |
complist = NULL; |
72 |
> |
listpos = complen = 0; |
73 |
> |
lastin = -1; |
74 |
> |
return; |
75 |
|
} |
76 |
+ |
complist = (PACKHEAD *)malloc(nents*sizeof(PACKHEAD)); |
77 |
+ |
if (complist == NULL) |
78 |
+ |
goto memerr; |
79 |
+ |
bcopy((char *)clist, (char *)complist, nents*sizeof(PACKHEAD)); |
80 |
+ |
complen = nents; /* finish initialization below */ |
81 |
+ |
break; |
82 |
+ |
case BS_ADD: /* add to computation set */ |
83 |
+ |
case BS_ADJ: /* adjust set quantities */ |
84 |
+ |
if (nents <= 0) |
85 |
+ |
return; |
86 |
+ |
/* merge any common members */ |
87 |
+ |
for (n = 0; n < nents; n++) { |
88 |
+ |
for (i = 0; i < complen; i++) |
89 |
+ |
if (clist[n].bi == complist[i].bi && |
90 |
+ |
clist[n].hd == complist[i].hd) { |
91 |
+ |
int oldnr = complist[i].nr; |
92 |
+ |
if (op == BS_ADD) |
93 |
+ |
complist[i].nr += clist[n].nr; |
94 |
+ |
else /* op == BS_ADJ */ |
95 |
+ |
complist[i].nr = clist[n].nr; |
96 |
+ |
clist[n].nr = 0; |
97 |
+ |
clist[n].nc = complist[i].nc; |
98 |
+ |
if (complist[i].nr != oldnr) |
99 |
+ |
lastin = -1; /* flag sort */ |
100 |
+ |
break; |
101 |
+ |
} |
102 |
+ |
if (i >= complen) |
103 |
+ |
clist[n].nc = bnrays(hdlist[clist[n].hd], |
104 |
+ |
clist[n].bi); |
105 |
+ |
} |
106 |
+ |
/* sort updated list */ |
107 |
+ |
sortcomplist(); |
108 |
+ |
/* sort new entries */ |
109 |
+ |
qsort((char *)clist, nents, sizeof(PACKHEAD), beamcmp); |
110 |
+ |
/* what can't we satisfy? */ |
111 |
+ |
for (n = 0; n < nents && clist[n].nr > clist[n].nc; n++) |
112 |
+ |
; |
113 |
+ |
if (op == BS_ADJ) |
114 |
+ |
nents = n; |
115 |
+ |
if (n) { /* allocate space for merged list */ |
116 |
+ |
PACKHEAD *newlist; |
117 |
+ |
newlist = (PACKHEAD *)malloc( |
118 |
+ |
(complen+n)*sizeof(PACKHEAD) ); |
119 |
+ |
if (newlist == NULL) |
120 |
+ |
goto memerr; |
121 |
+ |
/* merge lists */ |
122 |
+ |
mergeclists(newlist, clist, n, complist, complen); |
123 |
+ |
if (complen) |
124 |
+ |
free((char *)complist); |
125 |
+ |
complist = newlist; |
126 |
+ |
complen += n; |
127 |
+ |
} |
128 |
+ |
listpos = 0; |
129 |
+ |
lastin = complen-1; /* list is now sorted */ |
130 |
+ |
break; |
131 |
+ |
case BS_DEL: /* delete from computation set */ |
132 |
+ |
if (nents <= 0) |
133 |
+ |
return; |
134 |
+ |
/* find each member */ |
135 |
+ |
for (i = 0; i < complen; i++) |
136 |
+ |
for (n = 0; n < nents; n++) |
137 |
+ |
if (clist[n].bi == complist[i].bi && |
138 |
+ |
clist[n].hd == complist[i].hd) { |
139 |
+ |
if (clist[n].nr == 0 || |
140 |
+ |
clist[n].nr >= complist[i].nr) |
141 |
+ |
complist[i].nr = 0; |
142 |
+ |
else |
143 |
+ |
complist[i].nr -= clist[n].nr; |
144 |
+ |
lastin = -1; /* flag full sort */ |
145 |
+ |
break; |
146 |
+ |
} |
147 |
+ |
return; /* no display */ |
148 |
+ |
default: |
149 |
+ |
error(CONSISTENCY, "bundle_set called with unknown operation"); |
150 |
|
} |
151 |
< |
return(wres); |
151 |
> |
if (outdev != NULL) { /* load and display beams we have */ |
152 |
> |
register HDBEAMI *hb; |
153 |
> |
|
154 |
> |
hb = (HDBEAMI *)malloc(nents*sizeof(HDBEAMI)); |
155 |
> |
for (i = 0; i < nents; i++) { |
156 |
> |
hb[i].h = hdlist[clist[i].hd]; |
157 |
> |
hb[i].b = clist[i].bi; |
158 |
> |
} |
159 |
> |
hdloadbeams(hb, nents, dispbeam); |
160 |
> |
free((char *)hb); |
161 |
> |
} |
162 |
> |
if (op == BS_NEW) { |
163 |
> |
done_packets(flush_queue()); /* empty queue, so we can... */ |
164 |
> |
for (i = 0; i < complen; i++) /* ...get number computed */ |
165 |
> |
complist[i].nc = bnrays(hdlist[complist[i].hd], |
166 |
> |
complist[i].bi); |
167 |
> |
listpos = 0; |
168 |
> |
lastin = -1; /* flag for initial sort */ |
169 |
> |
} |
170 |
> |
return; |
171 |
> |
memerr: |
172 |
> |
error(SYSTEM, "out of memory in bundle_set"); |
173 |
|
} |
174 |
|
|
175 |
|
|
176 |
< |
int |
177 |
< |
beamcmp(b0, b1) /* comparison for descending compute order */ |
178 |
< |
register PACKHEAD *b0, *b1; |
176 |
> |
double |
177 |
> |
beamvolume(hp, bi) /* compute approximate volume of a beam */ |
178 |
> |
HOLO *hp; |
179 |
> |
int bi; |
180 |
|
{ |
181 |
< |
return( b1->nr*(bnrays(hdlist[b0->hd],b0->bi)+1) - |
182 |
< |
b0->nr*(bnrays(hdlist[b1->hd],b1->bi)+1) ); |
181 |
> |
GCOORD gc[2]; |
182 |
> |
FVECT cp[4], edgeA, edgeB, cent[2]; |
183 |
> |
FVECT v, crossp[2], diffv; |
184 |
> |
double vol[2]; |
185 |
> |
register int i; |
186 |
> |
/* get grid coordinates */ |
187 |
> |
if (!hdbcoord(gc, hp, bi)) |
188 |
> |
error(CONSISTENCY, "bad beam index in beamvolume"); |
189 |
> |
for (i = 0; i < 2; i++) { /* compute cell area vectors */ |
190 |
> |
hdcell(cp, hp, gc+i); |
191 |
> |
VSUM(edgeA, cp[1], cp[0], -1.0); |
192 |
> |
VSUM(edgeB, cp[3], cp[1], -1.0); |
193 |
> |
fcross(crossp[i], edgeA, edgeB); |
194 |
> |
/* compute center */ |
195 |
> |
cent[i][0] = 0.5*(cp[0][0] + cp[2][0]); |
196 |
> |
cent[i][1] = 0.5*(cp[0][1] + cp[2][1]); |
197 |
> |
cent[i][2] = 0.5*(cp[0][2] + cp[2][2]); |
198 |
> |
} |
199 |
> |
/* compute difference vector */ |
200 |
> |
VSUM(diffv, cent[1], cent[0], -1.0); |
201 |
> |
for (i = 0; i < 2; i++) { /* compute volume contributions */ |
202 |
> |
vol[i] = 0.5*DOT(crossp[i], diffv); |
203 |
> |
if (vol[i] < 0.) vol[i] = -vol[i]; |
204 |
> |
} |
205 |
> |
return(vol[0] + vol[1]); /* return total volume */ |
206 |
|
} |
207 |
|
|
208 |
|
|
209 |
|
init_global() /* initialize global ray computation */ |
210 |
|
{ |
211 |
|
long wtotal = 0; |
97 |
– |
int i, j; |
98 |
– |
int lseg[2][3]; |
212 |
|
double frac; |
213 |
< |
register int k; |
213 |
> |
int i; |
214 |
> |
register int j, k; |
215 |
> |
/* free old list and empty queue */ |
216 |
> |
if (complen > 0) { |
217 |
> |
free((char *)complist); |
218 |
> |
done_packets(flush_queue()); |
219 |
> |
} |
220 |
|
/* allocate beam list */ |
221 |
|
complen = 0; |
222 |
|
for (j = 0; hdlist[j] != NULL; j++) |
226 |
|
error(SYSTEM, "out of memory in init_global"); |
227 |
|
/* compute beam weights */ |
228 |
|
k = 0; |
229 |
< |
for (j = 0; hdlist[j] != NULL; j++) |
229 |
> |
for (j = 0; hdlist[j] != NULL; j++) { |
230 |
> |
frac = 512. * hdlist[j]->wg[0] * |
231 |
> |
hdlist[j]->wg[1] * hdlist[j]->wg[2]; |
232 |
> |
if (frac < 0.) frac = -frac; |
233 |
|
for (i = nbeams(hdlist[j]); i > 0; i--) { |
112 |
– |
hdlseg(lseg, hdlist[j], i); |
234 |
|
complist[k].hd = j; |
235 |
|
complist[k].bi = i; |
236 |
< |
complist[k].nr = lineweight( hdlist[j], |
237 |
< |
lseg[0][0], lseg[0][1], lseg[0][2], |
117 |
< |
lseg[1][0] - lseg[0][0], |
118 |
< |
lseg[1][1] - lseg[0][1], |
119 |
< |
lseg[1][2] - lseg[0][2] ); |
236 |
> |
complist[k].nr = frac*beamvolume(hdlist[j], i) + 0.5; |
237 |
> |
complist[k].nc = bnrays(hdlist[j], i); |
238 |
|
wtotal += complist[k++].nr; |
239 |
|
} |
240 |
+ |
} |
241 |
|
/* adjust weights */ |
242 |
< |
if (vdef(DISKSPACE)) { |
242 |
> |
if (vdef(DISKSPACE)) |
243 |
|
frac = 1024.*1024.*vflt(DISKSPACE) / (wtotal*sizeof(RAYVAL)); |
244 |
< |
if (frac < 0.95 | frac > 1.05) |
245 |
< |
while (k--) |
246 |
< |
complist[k].nr = frac * complist[k].nr; |
247 |
< |
} |
248 |
< |
listpos = 0; lastin = -1; |
244 |
> |
else |
245 |
> |
frac = 1024.*1024.*16384. / (wtotal*sizeof(RAYVAL)); |
246 |
> |
while (k--) |
247 |
> |
complist[k].nr = frac * complist[k].nr; |
248 |
> |
listpos = 0; lastin = -1; /* flag initial sort */ |
249 |
|
} |
250 |
|
|
251 |
|
|
252 |
|
mergeclists(cdest, cl1, n1, cl2, n2) /* merge two sorted lists */ |
253 |
< |
PACKHEAD *cdest; |
254 |
< |
PACKHEAD *cl1, *cl2; |
253 |
> |
register PACKHEAD *cdest; |
254 |
> |
register PACKHEAD *cl1, *cl2; |
255 |
|
int n1, n2; |
256 |
|
{ |
257 |
< |
int cmp; |
257 |
> |
register int cmp; |
258 |
|
|
259 |
|
while (n1 | n2) { |
260 |
|
if (!n1) cmp = 1; |
275 |
|
sortcomplist() /* fix our list order */ |
276 |
|
{ |
277 |
|
PACKHEAD *list2; |
278 |
< |
/* empty queue */ |
279 |
< |
done_packets(flush_queue()); |
280 |
< |
if (lastin < 0) /* flag to sort entire list */ |
278 |
> |
register int i; |
279 |
> |
|
280 |
> |
if (complen <= 0) /* check to see if there is even a list */ |
281 |
> |
return; |
282 |
> |
if (lastin < 0 || listpos*4 >= complen*3) |
283 |
|
qsort((char *)complist, complen, sizeof(PACKHEAD), beamcmp); |
284 |
|
else if (listpos) { /* else sort and merge sublist */ |
285 |
|
list2 = (PACKHEAD *)malloc(listpos*sizeof(PACKHEAD)); |
291 |
|
complist+listpos, complen-listpos); |
292 |
|
free((char *)list2); |
293 |
|
} |
294 |
< |
listpos = 0; lastin = complen-1; |
294 |
> |
/* drop satisfied requests */ |
295 |
> |
for (i = complen; i-- && complist[i].nr <= complist[i].nc; ) |
296 |
> |
; |
297 |
> |
if (i < 0) { |
298 |
> |
free((char *)complist); |
299 |
> |
complist = NULL; |
300 |
> |
complen = 0; |
301 |
> |
} else if (i < complen-1) { |
302 |
> |
list2 = (PACKHEAD *)realloc((char *)complist, |
303 |
> |
(i+1)*sizeof(PACKHEAD)); |
304 |
> |
if (list2 != NULL) { |
305 |
> |
complist = list2; |
306 |
> |
complen = i+1; |
307 |
> |
} |
308 |
> |
} |
309 |
> |
listpos = 0; lastin = i; |
310 |
|
} |
311 |
|
|
312 |
|
|
316 |
|
* a given bundle to move way down in the computation order. We keep |
317 |
|
* track of where the computed bundle with the highest priority would end |
318 |
|
* up, and if we get further in our compute list than this, we resort the |
319 |
< |
* list and start again from the beginning. We have to flush the queue |
320 |
< |
* each time we sort, to ensure that we are not disturbing the order. |
185 |
< |
* If our major assumption is violated, and we have a very steep |
186 |
< |
* descent in our weights, then we will end up resorting much more often |
187 |
< |
* than necessary, resulting in frequent flushing of the queue. Since |
188 |
< |
* a merge sort is used, the sorting costs will be minimal. |
319 |
> |
* list and start again from the beginning. Since |
320 |
> |
* a merge sort is used, the sorting costs are minimal. |
321 |
|
*/ |
322 |
< |
next_packet(p) /* prepare packet for computation */ |
322 |
> |
next_packet(p, n) /* prepare packet for computation */ |
323 |
|
register PACKET *p; |
324 |
+ |
int n; |
325 |
|
{ |
193 |
– |
int ncomp; |
326 |
|
register int i; |
327 |
|
|
196 |
– |
if (complen <= 0) |
197 |
– |
return(0); |
328 |
|
if (listpos > lastin) /* time to sort the list */ |
329 |
|
sortcomplist(); |
330 |
+ |
if (complen <= 0) |
331 |
+ |
return(0); |
332 |
|
p->hd = complist[listpos].hd; |
333 |
|
p->bi = complist[listpos].bi; |
334 |
< |
ncomp = bnrays(hdlist[p->hd],p->bi); |
335 |
< |
p->nr = complist[listpos].nr - ncomp; |
334 |
> |
p->nc = complist[listpos].nc; |
335 |
> |
p->nr = complist[listpos].nr - p->nc; |
336 |
|
if (p->nr <= 0) |
337 |
|
return(0); |
338 |
< |
if (p->nr > RPACKSIZ) |
339 |
< |
p->nr = RPACKSIZ; |
340 |
< |
ncomp += p->nr; /* find where this one would go */ |
341 |
< |
while (lastin > listpos && complist[listpos].nr * |
342 |
< |
(bnrays(hdlist[complist[lastin].hd],complist[lastin].bi)+1) |
343 |
< |
> complist[lastin].nr * (ncomp+1)) |
338 |
> |
#ifdef DEBUG |
339 |
> |
if (n < 1 | n > RPACKSIZ) |
340 |
> |
error(CONSISTENCY, "next_packet called with bad n value"); |
341 |
> |
#endif |
342 |
> |
if (p->nr > n) |
343 |
> |
p->nr = n; |
344 |
> |
complist[listpos].nc += p->nr; /* find where this one would go */ |
345 |
> |
while (lastin > listpos && |
346 |
> |
beamcmp(complist+lastin, complist+listpos) > 0) |
347 |
|
lastin--; |
348 |
|
listpos++; |
349 |
|
return(1); |