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/* Copyright (c) 1986 Regents of the University of California */ |
2 |
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|
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#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
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static const char RCSid[] = "$Id$"; |
3 |
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#endif |
6 |
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|
4 |
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/* |
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* ambient.c - routines dealing with ambient (inter-reflected) component. |
6 |
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* |
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* The macro AMBFLUSH (if defined) is the number of ambient values |
11 |
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* to wait before flushing to the ambient file. |
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* |
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* 5/9/86 |
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* Declarations of external symbols in ambient.h |
8 |
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*/ |
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|
10 |
< |
#include "ray.h" |
10 |
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#include "copyright.h" |
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|
12 |
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#include "octree.h" |
12 |
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#include <string.h> |
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|
14 |
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#include "platform.h" |
15 |
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#include "ray.h" |
16 |
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#include "otypes.h" |
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#include "resolu.h" |
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#include "ambient.h" |
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#include "random.h" |
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|
21 |
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#define OCTSCALE 0.5 /* ceil((valid rad.)/(cube size)) */ |
21 |
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#ifndef OCTSCALE |
22 |
> |
#define OCTSCALE 1.0 /* ceil((valid rad.)/(cube size)) */ |
23 |
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#endif |
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|
25 |
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extern CUBE thescene; /* contains space boundaries */ |
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extern char *shm_boundary; /* memory sharing boundary */ |
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|
27 |
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extern COLOR ambval; /* global ambient component */ |
28 |
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extern double ambacc; /* ambient accuracy */ |
29 |
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extern int ambres; /* ambient resolution */ |
30 |
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extern int ambdiv; /* number of divisions for calculation */ |
30 |
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extern int ambssamp; /* number of super-samples */ |
31 |
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extern int ambounce; /* number of ambient bounces */ |
32 |
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extern char *amblist[]; /* ambient include/exclude list */ |
33 |
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extern int ambincl; /* include == 1, exclude == 0 */ |
27 |
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#ifndef MAXASET |
28 |
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#define MAXASET 4095 /* maximum number of elements in ambient set */ |
29 |
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#endif |
30 |
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OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
31 |
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|
32 |
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OBJECT ambset[128]; /* ambient include/exclude set */ |
32 |
> |
double maxarad; /* maximum ambient radius */ |
33 |
> |
double minarad; /* minimum ambient radius */ |
34 |
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|
35 |
< |
double maxarad; /* maximum ambient radius */ |
38 |
< |
double minarad; /* minimum ambient radius */ |
35 |
> |
static AMBTREE atrunk; /* our ambient trunk node */ |
36 |
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|
37 |
< |
typedef struct ambval { |
38 |
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FVECT pos; /* position in space */ |
42 |
< |
FVECT dir; /* normal direction */ |
43 |
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int lvl; /* recursion level of parent ray */ |
44 |
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float weight; /* weight of parent ray */ |
45 |
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COLOR val; /* computed ambient value */ |
46 |
< |
float rad; /* validity radius */ |
47 |
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struct ambval *next; /* next in list */ |
48 |
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} AMBVAL; /* ambient value */ |
37 |
> |
static FILE *ambfp = NULL; /* ambient file pointer */ |
38 |
> |
static int nunflshed = 0; /* number of unflushed ambient values */ |
39 |
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|
40 |
< |
typedef struct ambtree { |
41 |
< |
AMBVAL *alist; /* ambient value list */ |
42 |
< |
struct ambtree *kid; /* 8 child nodes */ |
43 |
< |
} AMBTREE; /* ambient octree */ |
40 |
> |
#ifndef SORT_THRESH |
41 |
> |
#ifdef SMLMEM |
42 |
> |
#define SORT_THRESH ((16L<<20)/sizeof(AMBVAL)) |
43 |
> |
#else |
44 |
> |
#define SORT_THRESH ((64L<<20)/sizeof(AMBVAL)) |
45 |
> |
#endif |
46 |
> |
#endif |
47 |
> |
#ifndef SORT_INTVL |
48 |
> |
#define SORT_INTVL (SORT_THRESH<<1) |
49 |
> |
#endif |
50 |
> |
#ifndef MAX_SORT_INTVL |
51 |
> |
#define MAX_SORT_INTVL (SORT_INTVL<<6) |
52 |
> |
#endif |
53 |
|
|
55 |
– |
typedef struct { |
56 |
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float k; /* error contribution per sample */ |
57 |
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COLOR v; /* ray sum */ |
58 |
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int n; /* number of samples */ |
59 |
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short t, p; /* theta, phi indices */ |
60 |
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} AMBSAMP; /* ambient sample */ |
54 |
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|
55 |
< |
static AMBTREE atrunk; /* our ambient trunk node */ |
55 |
> |
static double avsum = 0.; /* computed ambient value sum (log) */ |
56 |
> |
static unsigned int navsum = 0; /* number of values in avsum */ |
57 |
> |
static unsigned int nambvals = 0; /* total number of indirect values */ |
58 |
> |
static unsigned int nambshare = 0; /* number of values from file */ |
59 |
> |
static unsigned long ambclock = 0; /* ambient access clock */ |
60 |
> |
static unsigned long lastsort = 0; /* time of last value sort */ |
61 |
> |
static long sortintvl = SORT_INTVL; /* time until next sort */ |
62 |
> |
static FILE *ambinp = NULL; /* auxiliary file for input */ |
63 |
> |
static long lastpos = -1; /* last flush position */ |
64 |
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|
65 |
< |
static FILE *ambfp = NULL; /* ambient file pointer */ |
65 |
> |
#define MAXACLOCK (1L<<30) /* clock turnover value */ |
66 |
> |
/* |
67 |
> |
* Track access times unless we are sharing ambient values |
68 |
> |
* through memory on a multiprocessor, when we want to avoid |
69 |
> |
* claiming our own memory (copy on write). Go ahead anyway |
70 |
> |
* if more than two thirds of our values are unshared. |
71 |
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* Compile with -Dtracktime=0 to turn this code off. |
72 |
> |
*/ |
73 |
> |
#ifndef tracktime |
74 |
> |
#define tracktime (shm_boundary == NULL || nambvals > 3*nambshare) |
75 |
> |
#endif |
76 |
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|
77 |
< |
#define newambval() (AMBVAL *)bmalloc(sizeof(AMBVAL)) |
77 |
> |
#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
78 |
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|
79 |
< |
#define newambtree() (AMBTREE *)calloc(8, sizeof(AMBTREE)) |
79 |
> |
#define newambval() (AMBVAL *)malloc(sizeof(AMBVAL)) |
80 |
> |
#define freeav(av) free((void *)av); |
81 |
|
|
82 |
< |
double sumambient(), doambient(), makeambient(); |
82 |
> |
static void initambfile(int creat); |
83 |
> |
static void avsave(AMBVAL *av); |
84 |
> |
static AMBVAL *avstore(AMBVAL *aval); |
85 |
> |
static AMBTREE *newambtree(void); |
86 |
> |
static void freeambtree(AMBTREE *atp); |
87 |
|
|
88 |
+ |
typedef void unloadtf_t(AMBVAL *); |
89 |
+ |
static unloadtf_t avinsert; |
90 |
+ |
static unloadtf_t av2list; |
91 |
+ |
static unloadtf_t avfree; |
92 |
+ |
static void unloadatree(AMBTREE *at, unloadtf_t *f); |
93 |
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|
94 |
< |
setambient(afile) /* initialize calculation */ |
95 |
< |
char *afile; |
94 |
> |
static int aposcmp(const void *avp1, const void *avp2); |
95 |
> |
static int avlmemi(AMBVAL *avaddr); |
96 |
> |
static void sortambvals(int always); |
97 |
> |
|
98 |
> |
#ifdef F_SETLKW |
99 |
> |
static void aflock(int typ); |
100 |
> |
#endif |
101 |
> |
|
102 |
> |
|
103 |
> |
void |
104 |
> |
setambres( /* set ambient resolution */ |
105 |
> |
int ar |
106 |
> |
) |
107 |
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{ |
108 |
< |
long ftell(); |
109 |
< |
char **amblp; |
110 |
< |
OBJECT obj; |
111 |
< |
AMBVAL amb; |
112 |
< |
/* set up ambient set */ |
113 |
< |
ambset[0] = 0; |
114 |
< |
for (amblp = amblist; *amblp != NULL; amblp++) { |
115 |
< |
if ((obj = modifier(*amblp)) == OVOID) { |
116 |
< |
sprintf(errmsg, "unknown %s modifier \"%s\"", |
117 |
< |
ambincl ? "include" : "exclude", *amblp); |
108 |
> |
ambres = ar < 0 ? 0 : ar; /* may be done already */ |
109 |
> |
/* set min & max radii */ |
110 |
> |
if (ar <= 0) { |
111 |
> |
minarad = 0; |
112 |
> |
maxarad = thescene.cusize*0.5; |
113 |
> |
} else { |
114 |
> |
minarad = thescene.cusize / ar; |
115 |
> |
maxarad = 64.0 * minarad; /* heuristic */ |
116 |
> |
if (maxarad > thescene.cusize*0.5) |
117 |
> |
maxarad = thescene.cusize*0.5; |
118 |
> |
} |
119 |
> |
if (minarad <= FTINY) |
120 |
> |
minarad = 10.0*FTINY; |
121 |
> |
if (maxarad <= minarad) |
122 |
> |
maxarad = 64.0 * minarad; |
123 |
> |
} |
124 |
> |
|
125 |
> |
|
126 |
> |
void |
127 |
> |
setambacc( /* set ambient accuracy */ |
128 |
> |
double newa |
129 |
> |
) |
130 |
> |
{ |
131 |
> |
static double olda; /* remember previous setting here */ |
132 |
> |
|
133 |
> |
newa *= (newa > 0); |
134 |
> |
if (fabs(newa - olda) >= .05*(newa + olda)) { |
135 |
> |
ambacc = newa; |
136 |
> |
if (nambvals > 0) |
137 |
> |
sortambvals(1); /* rebuild tree */ |
138 |
> |
} |
139 |
> |
} |
140 |
> |
|
141 |
> |
|
142 |
> |
void |
143 |
> |
setambient(void) /* initialize calculation */ |
144 |
> |
{ |
145 |
> |
int readonly = 0; |
146 |
> |
long flen; |
147 |
> |
AMBVAL amb; |
148 |
> |
/* make sure we're fresh */ |
149 |
> |
ambdone(); |
150 |
> |
/* init ambient limits */ |
151 |
> |
setambres(ambres); |
152 |
> |
setambacc(ambacc); |
153 |
> |
if (ambfile == NULL || !ambfile[0]) |
154 |
> |
return; |
155 |
> |
if (ambacc <= FTINY) { |
156 |
> |
sprintf(errmsg, "zero ambient accuracy so \"%s\" not opened", |
157 |
> |
ambfile); |
158 |
> |
error(WARNING, errmsg); |
159 |
> |
return; |
160 |
> |
} |
161 |
> |
/* open ambient file */ |
162 |
> |
if ((ambfp = fopen(ambfile, "r+")) == NULL) |
163 |
> |
readonly = (ambfp = fopen(ambfile, "r")) != NULL; |
164 |
> |
if (ambfp != NULL) { |
165 |
> |
initambfile(0); /* file exists */ |
166 |
> |
lastpos = ftell(ambfp); |
167 |
> |
while (readambval(&amb, ambfp)) |
168 |
> |
avinsert(avstore(&amb)); |
169 |
> |
nambshare = nambvals; /* share loaded values */ |
170 |
> |
if (readonly) { |
171 |
> |
sprintf(errmsg, |
172 |
> |
"loaded %u values from read-only ambient file", |
173 |
> |
nambvals); |
174 |
|
error(WARNING, errmsg); |
175 |
< |
continue; |
175 |
> |
fclose(ambfp); /* close file so no writes */ |
176 |
> |
ambfp = NULL; |
177 |
> |
return; /* avoid ambsync() */ |
178 |
|
} |
179 |
< |
if (!inset(ambset, obj)) |
180 |
< |
insertelem(ambset, obj); |
179 |
> |
/* align file pointer */ |
180 |
> |
lastpos += (long)nambvals*AMBVALSIZ; |
181 |
> |
flen = lseek(fileno(ambfp), (off_t)0, SEEK_END); |
182 |
> |
if (flen != lastpos) { |
183 |
> |
sprintf(errmsg, |
184 |
> |
"ignoring last %ld values in ambient file (corrupted)", |
185 |
> |
(flen - lastpos)/AMBVALSIZ); |
186 |
> |
error(WARNING, errmsg); |
187 |
> |
fseek(ambfp, lastpos, SEEK_SET); |
188 |
> |
#ifndef _WIN32 /* XXX we need a replacement for that one */ |
189 |
> |
ftruncate(fileno(ambfp), (off_t)lastpos); |
190 |
> |
#endif |
191 |
> |
} |
192 |
> |
} else if ((ambfp = fopen(ambfile, "w+")) != NULL) { |
193 |
> |
initambfile(1); /* else create new file */ |
194 |
> |
fflush(ambfp); |
195 |
> |
lastpos = ftell(ambfp); |
196 |
> |
} else { |
197 |
> |
sprintf(errmsg, "cannot open ambient file \"%s\"", ambfile); |
198 |
> |
error(SYSTEM, errmsg); |
199 |
|
} |
200 |
< |
maxarad = thescene.cusize / 2.0; /* maximum radius */ |
201 |
< |
/* minimum radius */ |
202 |
< |
minarad = ambres > 0 ? thescene.cusize/ambres : 0.0; |
200 |
> |
#ifdef getc_unlocked |
201 |
> |
flockfile(ambfp); /* application-level lock */ |
202 |
> |
#endif |
203 |
> |
#ifdef F_SETLKW |
204 |
> |
aflock(F_UNLCK); /* release file */ |
205 |
> |
#endif |
206 |
> |
} |
207 |
|
|
208 |
< |
/* open ambient file */ |
209 |
< |
if (afile != NULL) |
210 |
< |
if ((ambfp = fopen(afile, "r+")) != NULL) { |
211 |
< |
while (fread(&amb, sizeof(AMBVAL), 1, ambfp) == 1) |
212 |
< |
avinsert(&amb, &atrunk, thescene.cuorg, |
213 |
< |
thescene.cusize); |
214 |
< |
/* align */ |
215 |
< |
fseek(ambfp, -(ftell(ambfp)%sizeof(AMBVAL)), 1); |
216 |
< |
} else if ((ambfp = fopen(afile, "w")) == NULL) { |
217 |
< |
sprintf(errmsg, "cannot open ambient file \"%s\"", |
218 |
< |
afile); |
107 |
< |
error(SYSTEM, errmsg); |
208 |
> |
|
209 |
> |
void |
210 |
> |
ambdone(void) /* close ambient file and free memory */ |
211 |
> |
{ |
212 |
> |
if (ambfp != NULL) { /* close ambient file */ |
213 |
> |
ambsync(); |
214 |
> |
fclose(ambfp); |
215 |
> |
ambfp = NULL; |
216 |
> |
if (ambinp != NULL) { |
217 |
> |
fclose(ambinp); |
218 |
> |
ambinp = NULL; |
219 |
|
} |
220 |
+ |
lastpos = -1; |
221 |
+ |
} |
222 |
+ |
/* free ambient tree */ |
223 |
+ |
unloadatree(&atrunk, &avfree); |
224 |
+ |
/* reset state variables */ |
225 |
+ |
avsum = 0.; |
226 |
+ |
navsum = 0; |
227 |
+ |
nambvals = 0; |
228 |
+ |
nambshare = 0; |
229 |
+ |
ambclock = 0; |
230 |
+ |
lastsort = 0; |
231 |
+ |
sortintvl = SORT_INTVL; |
232 |
|
} |
233 |
|
|
234 |
|
|
235 |
< |
ambient(acol, r) /* compute ambient component for ray */ |
236 |
< |
COLOR acol; |
237 |
< |
register RAY *r; |
235 |
> |
void |
236 |
> |
ambnotify( /* record new modifier */ |
237 |
> |
OBJECT obj |
238 |
> |
) |
239 |
|
{ |
240 |
< |
static int rdepth = 0; /* ambient recursion */ |
241 |
< |
double wsum; |
240 |
> |
static int hitlimit = 0; |
241 |
> |
OBJREC *o; |
242 |
> |
char **amblp; |
243 |
|
|
244 |
< |
rdepth++; /* increment level */ |
244 |
> |
if (obj == OVOID) { /* starting over */ |
245 |
> |
ambset[0] = 0; |
246 |
> |
hitlimit = 0; |
247 |
> |
return; |
248 |
> |
} |
249 |
> |
o = objptr(obj); |
250 |
> |
if (hitlimit || !ismodifier(o->otype)) |
251 |
> |
return; |
252 |
> |
for (amblp = amblist; *amblp != NULL; amblp++) |
253 |
> |
if (!strcmp(o->oname, *amblp)) { |
254 |
> |
if (ambset[0] >= MAXASET) { |
255 |
> |
error(WARNING, "too many modifiers in ambient list"); |
256 |
> |
hitlimit++; |
257 |
> |
return; /* should this be fatal? */ |
258 |
> |
} |
259 |
> |
insertelem(ambset, obj); |
260 |
> |
return; |
261 |
> |
} |
262 |
> |
} |
263 |
|
|
264 |
+ |
/************ THE FOLLOWING ROUTINES DIFFER BETWEEN NEW & OLD ***************/ |
265 |
+ |
|
266 |
+ |
#ifdef NEWAMB |
267 |
+ |
|
268 |
+ |
#define tfunc(lwr, x, upr) (((x)-(lwr))/((upr)-(lwr))) |
269 |
+ |
|
270 |
+ |
static double sumambient(COLOR acol, RAY *r, FVECT rn, int al, |
271 |
+ |
AMBTREE *at, FVECT c0, double s); |
272 |
+ |
static int makeambient(COLOR acol, RAY *r, FVECT rn, int al); |
273 |
+ |
static void extambient(COLOR cr, AMBVAL *ap, FVECT pv, FVECT nv, |
274 |
+ |
FVECT uvw[3]); |
275 |
+ |
|
276 |
+ |
void |
277 |
+ |
multambient( /* compute ambient component & multiply by coef. */ |
278 |
+ |
COLOR aval, |
279 |
+ |
RAY *r, |
280 |
+ |
FVECT nrm |
281 |
+ |
) |
282 |
+ |
{ |
283 |
+ |
static int rdepth = 0; /* ambient recursion */ |
284 |
+ |
COLOR acol; |
285 |
+ |
int ok; |
286 |
+ |
double d, l; |
287 |
+ |
|
288 |
|
if (ambdiv <= 0) /* no ambient calculation */ |
289 |
|
goto dumbamb; |
290 |
|
/* check number of bounces */ |
291 |
< |
if (rdepth > ambounce) |
291 |
> |
if (rdepth >= ambounce) |
292 |
|
goto dumbamb; |
293 |
|
/* check ambient list */ |
294 |
|
if (ambincl != -1 && r->ro != NULL && |
296 |
|
goto dumbamb; |
297 |
|
|
298 |
|
if (ambacc <= FTINY) { /* no ambient storage */ |
299 |
< |
if (doambient(acol, r) == 0.0) |
299 |
> |
copycolor(acol, aval); |
300 |
> |
rdepth++; |
301 |
> |
ok = doambient(acol, r, r->rweight, NULL, NULL, NULL, NULL); |
302 |
> |
rdepth--; |
303 |
> |
if (!ok) |
304 |
|
goto dumbamb; |
305 |
< |
goto done; |
305 |
> |
copycolor(aval, acol); |
306 |
> |
return; |
307 |
|
} |
308 |
< |
/* get ambient value */ |
308 |
> |
|
309 |
> |
if (tracktime) /* sort to minimize thrashing */ |
310 |
> |
sortambvals(0); |
311 |
> |
/* interpolate ambient value */ |
312 |
|
setcolor(acol, 0.0, 0.0, 0.0); |
313 |
< |
wsum = sumambient(acol, r, &atrunk, thescene.cuorg, thescene.cusize); |
314 |
< |
if (wsum > FTINY) |
315 |
< |
scalecolor(acol, 1.0/wsum); |
316 |
< |
else if (makeambient(acol, r) == 0.0) |
313 |
> |
d = sumambient(acol, r, nrm, rdepth, |
314 |
> |
&atrunk, thescene.cuorg, thescene.cusize); |
315 |
> |
if (d > FTINY) { |
316 |
> |
d = 1.0/d; |
317 |
> |
scalecolor(acol, d); |
318 |
> |
multcolor(aval, acol); |
319 |
> |
return; |
320 |
> |
} |
321 |
> |
rdepth++; /* need to cache new value */ |
322 |
> |
ok = makeambient(acol, r, nrm, rdepth-1); |
323 |
> |
rdepth--; |
324 |
> |
if (ok) { |
325 |
> |
multcolor(aval, acol); /* computed new value */ |
326 |
> |
return; |
327 |
> |
} |
328 |
> |
dumbamb: /* return global value */ |
329 |
> |
if ((ambvwt <= 0) | (navsum == 0)) { |
330 |
> |
multcolor(aval, ambval); |
331 |
> |
return; |
332 |
> |
} |
333 |
> |
l = bright(ambval); /* average in computations */ |
334 |
> |
if (l > FTINY) { |
335 |
> |
d = (log(l)*(double)ambvwt + avsum) / |
336 |
> |
(double)(ambvwt + navsum); |
337 |
> |
d = exp(d) / l; |
338 |
> |
scalecolor(aval, d); |
339 |
> |
multcolor(aval, ambval); /* apply color of ambval */ |
340 |
> |
} else { |
341 |
> |
d = exp( avsum / (double)navsum ); |
342 |
> |
scalecolor(aval, d); /* neutral color */ |
343 |
> |
} |
344 |
> |
} |
345 |
> |
|
346 |
> |
|
347 |
> |
double |
348 |
> |
sumambient( /* get interpolated ambient value */ |
349 |
> |
COLOR acol, |
350 |
> |
RAY *r, |
351 |
> |
FVECT rn, |
352 |
> |
int al, |
353 |
> |
AMBTREE *at, |
354 |
> |
FVECT c0, |
355 |
> |
double s |
356 |
> |
) |
357 |
> |
{ /* initial limit is 10 degrees plus ambacc radians */ |
358 |
> |
const double minangle = 10.0 * PI/180.; |
359 |
> |
double maxangle = minangle + ambacc; |
360 |
> |
double wsum = 0.0; |
361 |
> |
FVECT ck0; |
362 |
> |
int i, j; |
363 |
> |
AMBVAL *av; |
364 |
> |
|
365 |
> |
if (at->kid != NULL) { /* sum children first */ |
366 |
> |
s *= 0.5; |
367 |
> |
for (i = 0; i < 8; i++) { |
368 |
> |
for (j = 0; j < 3; j++) { |
369 |
> |
ck0[j] = c0[j]; |
370 |
> |
if (1<<j & i) |
371 |
> |
ck0[j] += s; |
372 |
> |
if (r->rop[j] < ck0[j] - OCTSCALE*s) |
373 |
> |
break; |
374 |
> |
if (r->rop[j] > ck0[j] + (1.0+OCTSCALE)*s) |
375 |
> |
break; |
376 |
> |
} |
377 |
> |
if (j == 3) |
378 |
> |
wsum += sumambient(acol, r, rn, al, |
379 |
> |
at->kid+i, ck0, s); |
380 |
> |
} |
381 |
> |
/* good enough? */ |
382 |
> |
if (wsum >= 0.05 && s > minarad*10.0) |
383 |
> |
return(wsum); |
384 |
> |
} |
385 |
> |
/* adjust maximum angle */ |
386 |
> |
if (at->alist != NULL && (at->alist->lvl <= al) & (r->rweight < 0.6)) |
387 |
> |
maxangle = (maxangle - PI/2.)*pow(r->rweight,0.13) + PI/2.; |
388 |
> |
/* sum this node */ |
389 |
> |
for (av = at->alist; av != NULL; av = av->next) { |
390 |
> |
double d, delta_r2, delta_t2; |
391 |
> |
COLOR ct; |
392 |
> |
FVECT uvw[3]; |
393 |
> |
/* record access */ |
394 |
> |
if (tracktime) |
395 |
> |
av->latick = ambclock; |
396 |
> |
/* |
397 |
> |
* Ambient level test |
398 |
> |
*/ |
399 |
> |
if (av->lvl > al) /* list sorted, so this works */ |
400 |
> |
break; |
401 |
> |
if (av->weight < 0.9*r->rweight) |
402 |
> |
continue; |
403 |
> |
/* |
404 |
> |
* Direction test using unperturbed normal |
405 |
> |
*/ |
406 |
> |
decodedir(uvw[2], av->ndir); |
407 |
> |
d = DOT(uvw[2], r->ron); |
408 |
> |
if (d <= 0.0) /* >= 90 degrees */ |
409 |
> |
continue; |
410 |
> |
delta_r2 = 2.0 - 2.0*d; /* approx. radians^2 */ |
411 |
> |
if (delta_r2 >= maxangle*maxangle) |
412 |
> |
continue; |
413 |
> |
/* |
414 |
> |
* Modified ray behind test |
415 |
> |
*/ |
416 |
> |
VSUB(ck0, r->rop, av->pos); |
417 |
> |
d = DOT(ck0, uvw[2]); |
418 |
> |
if (d < -minarad*ambacc-.001) |
419 |
> |
continue; |
420 |
> |
d /= av->rad[0]; |
421 |
> |
delta_t2 = d*d; |
422 |
> |
if (delta_t2 >= ambacc*ambacc) |
423 |
> |
continue; |
424 |
> |
/* |
425 |
> |
* Elliptical radii test based on Hessian |
426 |
> |
*/ |
427 |
> |
decodedir(uvw[0], av->udir); |
428 |
> |
VCROSS(uvw[1], uvw[2], uvw[0]); |
429 |
> |
d = DOT(ck0, uvw[0]) / av->rad[0]; |
430 |
> |
delta_t2 += d*d; |
431 |
> |
d = DOT(ck0, uvw[1]) / av->rad[1]; |
432 |
> |
delta_t2 += d*d; |
433 |
> |
if (delta_t2 >= ambacc*ambacc) |
434 |
> |
continue; |
435 |
> |
/* |
436 |
> |
* Extrapolate value and compute final weight (hat function) |
437 |
> |
*/ |
438 |
> |
extambient(ct, av, r->rop, rn, uvw); |
439 |
> |
d = tfunc(maxangle, sqrt(delta_r2), 0.0) * |
440 |
> |
tfunc(ambacc, sqrt(delta_t2), 0.0); |
441 |
> |
scalecolor(ct, d); |
442 |
> |
addcolor(acol, ct); |
443 |
> |
wsum += d; |
444 |
> |
} |
445 |
> |
return(wsum); |
446 |
> |
} |
447 |
> |
|
448 |
> |
|
449 |
> |
int |
450 |
> |
makeambient( /* make a new ambient value for storage */ |
451 |
> |
COLOR acol, |
452 |
> |
RAY *r, |
453 |
> |
FVECT rn, |
454 |
> |
int al |
455 |
> |
) |
456 |
> |
{ |
457 |
> |
AMBVAL amb; |
458 |
> |
FVECT uvw[3]; |
459 |
> |
int i; |
460 |
> |
|
461 |
> |
amb.weight = 1.0; /* compute weight */ |
462 |
> |
for (i = al; i-- > 0; ) |
463 |
> |
amb.weight *= AVGREFL; |
464 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic override */ |
465 |
> |
amb.weight = 1.25*r->rweight; |
466 |
> |
setcolor(acol, AVGREFL, AVGREFL, AVGREFL); |
467 |
> |
/* compute ambient */ |
468 |
> |
i = doambient(acol, r, amb.weight, uvw, amb.rad, amb.gpos, amb.gdir); |
469 |
> |
scalecolor(acol, 1./AVGREFL); /* undo assumed reflectance */ |
470 |
> |
if (i <= 0 || amb.rad[0] <= FTINY) /* no Hessian or zero radius */ |
471 |
> |
return(i); |
472 |
> |
/* store value */ |
473 |
> |
VCOPY(amb.pos, r->rop); |
474 |
> |
amb.ndir = encodedir(r->ron); |
475 |
> |
amb.udir = encodedir(uvw[0]); |
476 |
> |
amb.lvl = al; |
477 |
> |
copycolor(amb.val, acol); |
478 |
> |
/* insert into tree */ |
479 |
> |
avsave(&amb); /* and save to file */ |
480 |
> |
if (rn != r->ron) { /* texture */ |
481 |
> |
VCOPY(uvw[2], r->ron); |
482 |
> |
extambient(acol, &amb, r->rop, rn, uvw); |
483 |
> |
} |
484 |
> |
return(1); |
485 |
> |
} |
486 |
> |
|
487 |
> |
|
488 |
> |
void |
489 |
> |
extambient( /* extrapolate value at pv, nv */ |
490 |
> |
COLOR cr, |
491 |
> |
AMBVAL *ap, |
492 |
> |
FVECT pv, |
493 |
> |
FVECT nv, |
494 |
> |
FVECT uvw[3] |
495 |
> |
) |
496 |
> |
{ |
497 |
> |
static FVECT my_uvw[3]; |
498 |
> |
FVECT v1; |
499 |
> |
int i; |
500 |
> |
double d = 1.0; /* zeroeth order */ |
501 |
> |
|
502 |
> |
if (uvw == NULL) { /* need local coordinates? */ |
503 |
> |
decodedir(my_uvw[2], ap->ndir); |
504 |
> |
decodedir(my_uvw[0], ap->udir); |
505 |
> |
VCROSS(my_uvw[1], my_uvw[2], my_uvw[0]); |
506 |
> |
uvw = my_uvw; |
507 |
> |
} |
508 |
> |
for (i = 3; i--; ) /* gradient due to translation */ |
509 |
> |
d += (pv[i] - ap->pos[i]) * |
510 |
> |
(ap->gpos[0]*uvw[0][i] + ap->gpos[1]*uvw[1][i]); |
511 |
> |
|
512 |
> |
VCROSS(v1, uvw[2], nv); /* gradient due to rotation */ |
513 |
> |
for (i = 3; i--; ) |
514 |
> |
d += v1[i] * (ap->gdir[0]*uvw[0][i] + ap->gdir[1]*uvw[1][i]); |
515 |
> |
|
516 |
> |
if (d <= 0.0) { |
517 |
> |
setcolor(cr, 0.0, 0.0, 0.0); |
518 |
> |
return; |
519 |
> |
} |
520 |
> |
copycolor(cr, ap->val); |
521 |
> |
scalecolor(cr, d); |
522 |
> |
} |
523 |
> |
|
524 |
> |
|
525 |
> |
static void |
526 |
> |
avinsert( /* insert ambient value in our tree */ |
527 |
> |
AMBVAL *av |
528 |
> |
) |
529 |
> |
{ |
530 |
> |
AMBTREE *at; |
531 |
> |
AMBVAL *ap; |
532 |
> |
AMBVAL avh; |
533 |
> |
FVECT ck0; |
534 |
> |
double s; |
535 |
> |
int branch; |
536 |
> |
int i; |
537 |
> |
|
538 |
> |
if (av->rad[0] <= FTINY) |
539 |
> |
error(CONSISTENCY, "zero ambient radius in avinsert"); |
540 |
> |
at = &atrunk; |
541 |
> |
VCOPY(ck0, thescene.cuorg); |
542 |
> |
s = thescene.cusize; |
543 |
> |
while (s*(OCTSCALE/2) > av->rad[1]*ambacc) { |
544 |
> |
if (at->kid == NULL) |
545 |
> |
if ((at->kid = newambtree()) == NULL) |
546 |
> |
error(SYSTEM, "out of memory in avinsert"); |
547 |
> |
s *= 0.5; |
548 |
> |
branch = 0; |
549 |
> |
for (i = 0; i < 3; i++) |
550 |
> |
if (av->pos[i] > ck0[i] + s) { |
551 |
> |
ck0[i] += s; |
552 |
> |
branch |= 1 << i; |
553 |
> |
} |
554 |
> |
at = at->kid + branch; |
555 |
> |
} |
556 |
> |
avh.next = at->alist; /* order by increasing level */ |
557 |
> |
for (ap = &avh; ap->next != NULL; ap = ap->next) |
558 |
> |
if (ap->next->lvl >= av->lvl) |
559 |
> |
break; |
560 |
> |
av->next = ap->next; |
561 |
> |
ap->next = (AMBVAL*)av; |
562 |
> |
at->alist = avh.next; |
563 |
> |
} |
564 |
> |
|
565 |
> |
|
566 |
> |
#else /* ! NEWAMB */ |
567 |
> |
|
568 |
> |
static double sumambient(COLOR acol, RAY *r, FVECT rn, int al, |
569 |
> |
AMBTREE *at, FVECT c0, double s); |
570 |
> |
static double makeambient(COLOR acol, RAY *r, FVECT rn, int al); |
571 |
> |
static void extambient(COLOR cr, AMBVAL *ap, FVECT pv, FVECT nv); |
572 |
> |
|
573 |
> |
|
574 |
> |
void |
575 |
> |
multambient( /* compute ambient component & multiply by coef. */ |
576 |
> |
COLOR aval, |
577 |
> |
RAY *r, |
578 |
> |
FVECT nrm |
579 |
> |
) |
580 |
> |
{ |
581 |
> |
static int rdepth = 0; /* ambient recursion */ |
582 |
> |
COLOR acol; |
583 |
> |
double d, l; |
584 |
> |
|
585 |
> |
if (ambdiv <= 0) /* no ambient calculation */ |
586 |
|
goto dumbamb; |
587 |
< |
goto done; |
587 |
> |
/* check number of bounces */ |
588 |
> |
if (rdepth >= ambounce) |
589 |
> |
goto dumbamb; |
590 |
> |
/* check ambient list */ |
591 |
> |
if (ambincl != -1 && r->ro != NULL && |
592 |
> |
ambincl != inset(ambset, r->ro->omod)) |
593 |
> |
goto dumbamb; |
594 |
|
|
595 |
< |
dumbamb: /* return global value */ |
596 |
< |
copycolor(acol, ambval); |
597 |
< |
done: /* must finish here! */ |
595 |
> |
if (ambacc <= FTINY) { /* no ambient storage */ |
596 |
> |
copycolor(acol, aval); |
597 |
> |
rdepth++; |
598 |
> |
d = doambient(acol, r, r->rweight, NULL, NULL); |
599 |
> |
rdepth--; |
600 |
> |
if (d <= FTINY) |
601 |
> |
goto dumbamb; |
602 |
> |
copycolor(aval, acol); |
603 |
> |
return; |
604 |
> |
} |
605 |
> |
|
606 |
> |
if (tracktime) /* sort to minimize thrashing */ |
607 |
> |
sortambvals(0); |
608 |
> |
/* interpolate ambient value */ |
609 |
> |
setcolor(acol, 0.0, 0.0, 0.0); |
610 |
> |
d = sumambient(acol, r, nrm, rdepth, |
611 |
> |
&atrunk, thescene.cuorg, thescene.cusize); |
612 |
> |
if (d > FTINY) { |
613 |
> |
d = 1.0/d; |
614 |
> |
scalecolor(acol, d); |
615 |
> |
multcolor(aval, acol); |
616 |
> |
return; |
617 |
> |
} |
618 |
> |
rdepth++; /* need to cache new value */ |
619 |
> |
d = makeambient(acol, r, nrm, rdepth-1); |
620 |
|
rdepth--; |
621 |
+ |
if (d > FTINY) { |
622 |
+ |
multcolor(aval, acol); /* got new value */ |
623 |
+ |
return; |
624 |
+ |
} |
625 |
+ |
dumbamb: /* return global value */ |
626 |
+ |
if ((ambvwt <= 0) | (navsum == 0)) { |
627 |
+ |
multcolor(aval, ambval); |
628 |
+ |
return; |
629 |
+ |
} |
630 |
+ |
l = bright(ambval); /* average in computations */ |
631 |
+ |
if (l > FTINY) { |
632 |
+ |
d = (log(l)*(double)ambvwt + avsum) / |
633 |
+ |
(double)(ambvwt + navsum); |
634 |
+ |
d = exp(d) / l; |
635 |
+ |
scalecolor(aval, d); |
636 |
+ |
multcolor(aval, ambval); /* apply color of ambval */ |
637 |
+ |
} else { |
638 |
+ |
d = exp( avsum / (double)navsum ); |
639 |
+ |
scalecolor(aval, d); /* neutral color */ |
640 |
+ |
} |
641 |
|
} |
642 |
|
|
643 |
|
|
644 |
< |
double |
645 |
< |
sumambient(acol, r, at, c0, s) /* get interpolated ambient value */ |
646 |
< |
COLOR acol; |
647 |
< |
register RAY *r; |
648 |
< |
AMBTREE *at; |
649 |
< |
FVECT c0; |
650 |
< |
double s; |
644 |
> |
static double |
645 |
> |
sumambient( /* get interpolated ambient value */ |
646 |
> |
COLOR acol, |
647 |
> |
RAY *r, |
648 |
> |
FVECT rn, |
649 |
> |
int al, |
650 |
> |
AMBTREE *at, |
651 |
> |
FVECT c0, |
652 |
> |
double s |
653 |
> |
) |
654 |
|
{ |
655 |
< |
extern double sqrt(); |
161 |
< |
double d, e1, e2, wt, wsum; |
655 |
> |
double d, e1, e2, wt, wsum; |
656 |
|
COLOR ct; |
657 |
|
FVECT ck0; |
658 |
|
int i; |
659 |
< |
register int j; |
660 |
< |
register AMBVAL *av; |
661 |
< |
/* do this node */ |
659 |
> |
int j; |
660 |
> |
AMBVAL *av; |
661 |
> |
|
662 |
|
wsum = 0.0; |
663 |
+ |
/* do this node */ |
664 |
|
for (av = at->alist; av != NULL; av = av->next) { |
665 |
+ |
double rn_dot = -2.0; |
666 |
+ |
if (tracktime) |
667 |
+ |
av->latick = ambclock; |
668 |
|
/* |
669 |
< |
* Ray strength test. |
669 |
> |
* Ambient level test. |
670 |
|
*/ |
671 |
< |
if (av->lvl > r->rlvl || av->weight < r->rweight-FTINY) |
671 |
> |
if (av->lvl > al) /* list sorted, so this works */ |
672 |
> |
break; |
673 |
> |
if (av->weight < 0.9*r->rweight) |
674 |
|
continue; |
675 |
|
/* |
676 |
|
* Ambient radius test. |
677 |
|
*/ |
678 |
< |
e1 = 0.0; |
679 |
< |
for (j = 0; j < 3; j++) { |
180 |
< |
d = av->pos[j] - r->rop[j]; |
181 |
< |
e1 += d * d; |
182 |
< |
} |
183 |
< |
e1 /= av->rad * av->rad; |
678 |
> |
VSUB(ck0, av->pos, r->rop); |
679 |
> |
e1 = DOT(ck0, ck0) / (av->rad * av->rad); |
680 |
|
if (e1 > ambacc*ambacc*1.21) |
681 |
|
continue; |
682 |
|
/* |
683 |
< |
* Normal direction test. |
683 |
> |
* Direction test using closest normal. |
684 |
|
*/ |
685 |
< |
e2 = (1.0 - DOT(av->dir, r->ron)) * r->rweight; |
686 |
< |
if (e2 < 0.0) e2 = 0.0; |
687 |
< |
if (e1 + e2 > ambacc*ambacc*1.21) |
685 |
> |
d = DOT(av->dir, r->ron); |
686 |
> |
if (rn != r->ron) { |
687 |
> |
rn_dot = DOT(av->dir, rn); |
688 |
> |
if (rn_dot > 1.0-FTINY) |
689 |
> |
rn_dot = 1.0-FTINY; |
690 |
> |
if (rn_dot >= d-FTINY) { |
691 |
> |
d = rn_dot; |
692 |
> |
rn_dot = -2.0; |
693 |
> |
} |
694 |
> |
} |
695 |
> |
e2 = (1.0 - d) * r->rweight; |
696 |
> |
if (e2 < 0.0) |
697 |
> |
e2 = 0.0; |
698 |
> |
else if (e1 + e2 > ambacc*ambacc*1.21) |
699 |
|
continue; |
700 |
|
/* |
701 |
|
* Ray behind test. |
704 |
|
for (j = 0; j < 3; j++) |
705 |
|
d += (r->rop[j] - av->pos[j]) * |
706 |
|
(av->dir[j] + r->ron[j]); |
707 |
< |
if (d < -minarad) |
707 |
> |
if (d*0.5 < -minarad*ambacc-.001) |
708 |
|
continue; |
709 |
|
/* |
710 |
|
* Jittering final test reduces image artifacts. |
711 |
|
*/ |
712 |
< |
wt = sqrt(e1) + sqrt(e2); |
713 |
< |
wt *= .9 + .2*frandom(); |
714 |
< |
if (wt > ambacc) |
712 |
> |
e1 = sqrt(e1); |
713 |
> |
e2 = sqrt(e2); |
714 |
> |
wt = e1 + e2; |
715 |
> |
if (wt > ambacc*(.9+.2*urand(9015+samplendx))) |
716 |
|
continue; |
717 |
+ |
/* |
718 |
+ |
* Recompute directional error using perturbed normal |
719 |
+ |
*/ |
720 |
+ |
if (rn_dot > 0.0) { |
721 |
+ |
e2 = sqrt((1.0 - rn_dot)*r->rweight); |
722 |
+ |
wt = e1 + e2; |
723 |
+ |
} |
724 |
|
if (wt <= 1e-3) |
725 |
|
wt = 1e3; |
726 |
|
else |
727 |
|
wt = 1.0 / wt; |
728 |
|
wsum += wt; |
729 |
< |
copycolor(ct, av->val); |
729 |
> |
extambient(ct, av, r->rop, rn); |
730 |
|
scalecolor(ct, wt); |
731 |
|
addcolor(acol, ct); |
732 |
|
} |
745 |
|
break; |
746 |
|
} |
747 |
|
if (j == 3) |
748 |
< |
wsum += sumambient(acol, r, at->kid+i, ck0, s); |
748 |
> |
wsum += sumambient(acol, r, rn, al, |
749 |
> |
at->kid+i, ck0, s); |
750 |
|
} |
751 |
|
return(wsum); |
752 |
|
} |
753 |
|
|
754 |
|
|
755 |
< |
double |
756 |
< |
makeambient(acol, r) /* make a new ambient value */ |
757 |
< |
COLOR acol; |
758 |
< |
register RAY *r; |
755 |
> |
static double |
756 |
> |
makeambient( /* make a new ambient value for storage */ |
757 |
> |
COLOR acol, |
758 |
> |
RAY *r, |
759 |
> |
FVECT rn, |
760 |
> |
int al |
761 |
> |
) |
762 |
|
{ |
763 |
< |
AMBVAL amb; |
763 |
> |
AMBVAL amb; |
764 |
> |
FVECT gp, gd; |
765 |
> |
int i; |
766 |
|
|
767 |
< |
amb.rad = doambient(acol, r); /* compute ambient */ |
768 |
< |
if (amb.rad == 0.0) |
767 |
> |
amb.weight = 1.0; /* compute weight */ |
768 |
> |
for (i = al; i-- > 0; ) |
769 |
> |
amb.weight *= AVGREFL; |
770 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic override */ |
771 |
> |
amb.weight = 1.25*r->rweight; |
772 |
> |
setcolor(acol, AVGREFL, AVGREFL, AVGREFL); |
773 |
> |
/* compute ambient */ |
774 |
> |
amb.rad = doambient(acol, r, amb.weight, gp, gd); |
775 |
> |
if (amb.rad <= FTINY) { |
776 |
> |
setcolor(acol, 0.0, 0.0, 0.0); |
777 |
|
return(0.0); |
778 |
< |
/* store it */ |
778 |
> |
} |
779 |
> |
scalecolor(acol, 1./AVGREFL); /* undo assumed reflectance */ |
780 |
> |
/* store value */ |
781 |
|
VCOPY(amb.pos, r->rop); |
782 |
|
VCOPY(amb.dir, r->ron); |
783 |
< |
amb.lvl = r->rlvl; |
253 |
< |
amb.weight = r->rweight; |
783 |
> |
amb.lvl = al; |
784 |
|
copycolor(amb.val, acol); |
785 |
+ |
VCOPY(amb.gpos, gp); |
786 |
+ |
VCOPY(amb.gdir, gd); |
787 |
|
/* insert into tree */ |
788 |
< |
avinsert(&amb, &atrunk, thescene.cuorg, thescene.cusize); |
789 |
< |
avsave(&amb); /* write to file */ |
788 |
> |
avsave(&amb); /* and save to file */ |
789 |
> |
if (rn != r->ron) |
790 |
> |
extambient(acol, &amb, r->rop, rn); /* texture */ |
791 |
|
return(amb.rad); |
792 |
|
} |
793 |
|
|
794 |
|
|
795 |
< |
double |
796 |
< |
doambient(acol, r) /* compute ambient component */ |
797 |
< |
COLOR acol; |
798 |
< |
register RAY *r; |
795 |
> |
static void |
796 |
> |
extambient( /* extrapolate value at pv, nv */ |
797 |
> |
COLOR cr, |
798 |
> |
AMBVAL *ap, |
799 |
> |
FVECT pv, |
800 |
> |
FVECT nv |
801 |
> |
) |
802 |
|
{ |
803 |
< |
extern int ambcmp(); |
804 |
< |
extern double sin(), cos(), sqrt(); |
805 |
< |
double phi, xd, yd, zd; |
270 |
< |
double b, b2; |
271 |
< |
register AMBSAMP *div; |
272 |
< |
AMBSAMP dnew; |
273 |
< |
RAY ar; |
274 |
< |
FVECT ux, uy; |
275 |
< |
double arad; |
276 |
< |
int ndivs, nt, np, ns, ne, i, j; |
277 |
< |
register int k; |
803 |
> |
FVECT v1; |
804 |
> |
int i; |
805 |
> |
double d; |
806 |
|
|
807 |
< |
setcolor(acol, 0.0, 0.0, 0.0); |
808 |
< |
/* set number of divisions */ |
809 |
< |
nt = sqrt(ambdiv * r->rweight * 0.5) + 0.5; |
810 |
< |
np = 2 * nt; |
811 |
< |
ndivs = nt * np; |
812 |
< |
/* check first */ |
813 |
< |
if (ndivs == 0 || rayorigin(&ar, r, AMBIENT, 0.5) < 0) |
814 |
< |
return(0.0); |
815 |
< |
/* set number of super-samples */ |
816 |
< |
ns = ambssamp * r->rweight + 0.5; |
289 |
< |
if (ns > 0) { |
290 |
< |
div = (AMBSAMP *)malloc(ndivs*sizeof(AMBSAMP)); |
291 |
< |
if (div == NULL) |
292 |
< |
error(SYSTEM, "out of memory in doambient"); |
807 |
> |
d = 1.0; /* zeroeth order */ |
808 |
> |
/* gradient due to translation */ |
809 |
> |
for (i = 0; i < 3; i++) |
810 |
> |
d += ap->gpos[i]*(pv[i]-ap->pos[i]); |
811 |
> |
/* gradient due to rotation */ |
812 |
> |
VCROSS(v1, ap->dir, nv); |
813 |
> |
d += DOT(ap->gdir, v1); |
814 |
> |
if (d <= 0.0) { |
815 |
> |
setcolor(cr, 0.0, 0.0, 0.0); |
816 |
> |
return; |
817 |
|
} |
818 |
< |
/* make axes */ |
819 |
< |
uy[0] = uy[1] = uy[2] = 0.0; |
820 |
< |
for (k = 0; k < 3; k++) |
821 |
< |
if (r->ron[k] < 0.6 && r->ron[k] > -0.6) |
818 |
> |
copycolor(cr, ap->val); |
819 |
> |
scalecolor(cr, d); |
820 |
> |
} |
821 |
> |
|
822 |
> |
|
823 |
> |
static void |
824 |
> |
avinsert( /* insert ambient value in our tree */ |
825 |
> |
AMBVAL *av |
826 |
> |
) |
827 |
> |
{ |
828 |
> |
AMBTREE *at; |
829 |
> |
AMBVAL *ap; |
830 |
> |
AMBVAL avh; |
831 |
> |
FVECT ck0; |
832 |
> |
double s; |
833 |
> |
int branch; |
834 |
> |
int i; |
835 |
> |
|
836 |
> |
if (av->rad <= FTINY) |
837 |
> |
error(CONSISTENCY, "zero ambient radius in avinsert"); |
838 |
> |
at = &atrunk; |
839 |
> |
VCOPY(ck0, thescene.cuorg); |
840 |
> |
s = thescene.cusize; |
841 |
> |
while (s*(OCTSCALE/2) > av->rad*ambacc) { |
842 |
> |
if (at->kid == NULL) |
843 |
> |
if ((at->kid = newambtree()) == NULL) |
844 |
> |
error(SYSTEM, "out of memory in avinsert"); |
845 |
> |
s *= 0.5; |
846 |
> |
branch = 0; |
847 |
> |
for (i = 0; i < 3; i++) |
848 |
> |
if (av->pos[i] > ck0[i] + s) { |
849 |
> |
ck0[i] += s; |
850 |
> |
branch |= 1 << i; |
851 |
> |
} |
852 |
> |
at = at->kid + branch; |
853 |
> |
} |
854 |
> |
avh.next = at->alist; /* order by increasing level */ |
855 |
> |
for (ap = &avh; ap->next != NULL; ap = ap->next) |
856 |
> |
if (ap->next->lvl >= av->lvl) |
857 |
|
break; |
858 |
< |
uy[k] = 1.0; |
859 |
< |
fcross(ux, r->ron, uy); |
860 |
< |
normalize(ux); |
861 |
< |
fcross(uy, ux, r->ron); |
862 |
< |
/* sample divisions */ |
863 |
< |
arad = 0.0; |
864 |
< |
ne = 0; |
865 |
< |
for (i = 0; i < nt; i++) |
866 |
< |
for (j = 0; j < np; j++) { |
867 |
< |
rayorigin(&ar, r, AMBIENT, 0.5); /* pretested */ |
868 |
< |
zd = sqrt((i+frandom())/nt); |
869 |
< |
phi = 2.0*PI * (j+frandom())/np; |
870 |
< |
xd = cos(phi) * zd; |
871 |
< |
yd = sin(phi) * zd; |
872 |
< |
zd = sqrt(1.0 - zd*zd); |
873 |
< |
for (k = 0; k < 3; k++) |
874 |
< |
ar.rdir[k] = xd*ux[k]+yd*uy[k]+zd*r->ron[k]; |
875 |
< |
rayvalue(&ar); |
876 |
< |
if (ar.rot < FHUGE) |
877 |
< |
arad += 1.0 / ar.rot; |
878 |
< |
if (ns > 0) { /* save division */ |
879 |
< |
div[ne].k = 0.0; |
880 |
< |
copycolor(div[ne].v, ar.rcol); |
881 |
< |
div[ne].n = 0; |
882 |
< |
div[ne].t = i; div[ne].p = j; |
883 |
< |
/* sum errors */ |
884 |
< |
b = bright(ar.rcol); |
885 |
< |
if (i > 0) { /* from above */ |
886 |
< |
b2 = bright(div[ne-np].v) - b; |
887 |
< |
b2 *= b2 * 0.25; |
888 |
< |
div[ne].k += b2; |
889 |
< |
div[ne].n++; |
890 |
< |
div[ne-np].k += b2; |
891 |
< |
div[ne-np].n++; |
892 |
< |
} |
893 |
< |
if (j > 0) { /* from behind */ |
894 |
< |
b2 = bright(div[ne-1].v) - b; |
895 |
< |
b2 *= b2 * 0.25; |
896 |
< |
div[ne].k += b2; |
897 |
< |
div[ne].n++; |
898 |
< |
div[ne-1].k += b2; |
899 |
< |
div[ne-1].n++; |
900 |
< |
} |
901 |
< |
if (j == np-1) { /* around */ |
902 |
< |
b2 = bright(div[ne-(np-1)].v) - b; |
903 |
< |
b2 *= b2 * 0.25; |
904 |
< |
div[ne].k += b2; |
905 |
< |
div[ne].n++; |
906 |
< |
div[ne-(np-1)].k += b2; |
907 |
< |
div[ne-(np-1)].n++; |
908 |
< |
} |
909 |
< |
ne++; |
910 |
< |
} else |
911 |
< |
addcolor(acol, ar.rcol); |
912 |
< |
} |
913 |
< |
for (k = 0; k < ne; k++) { /* compute errors */ |
914 |
< |
if (div[k].n > 1) |
915 |
< |
div[k].k /= div[k].n; |
916 |
< |
div[k].n = 1; |
858 |
> |
av->next = ap->next; |
859 |
> |
ap->next = (AMBVAL*)av; |
860 |
> |
at->alist = avh.next; |
861 |
> |
} |
862 |
> |
|
863 |
> |
#endif /* ! NEWAMB */ |
864 |
> |
|
865 |
> |
/************* FOLLOWING ROUTINES SAME FOR NEW & OLD METHODS ***************/ |
866 |
> |
|
867 |
> |
static void |
868 |
> |
initambfile( /* initialize ambient file */ |
869 |
> |
int cre8 |
870 |
> |
) |
871 |
> |
{ |
872 |
> |
extern char *progname, *octname; |
873 |
> |
static char *mybuf = NULL; |
874 |
> |
|
875 |
> |
#ifdef F_SETLKW |
876 |
> |
aflock(cre8 ? F_WRLCK : F_RDLCK); |
877 |
> |
#endif |
878 |
> |
SET_FILE_BINARY(ambfp); |
879 |
> |
if (mybuf == NULL) |
880 |
> |
mybuf = (char *)bmalloc(BUFSIZ+8); |
881 |
> |
setbuf(ambfp, mybuf); |
882 |
> |
if (cre8) { /* new file */ |
883 |
> |
newheader("RADIANCE", ambfp); |
884 |
> |
fprintf(ambfp, "%s -av %g %g %g -aw %d -ab %d -aa %g ", |
885 |
> |
progname, colval(ambval,RED), |
886 |
> |
colval(ambval,GRN), colval(ambval,BLU), |
887 |
> |
ambvwt, ambounce, ambacc); |
888 |
> |
fprintf(ambfp, "-ad %d -as %d -ar %d ", |
889 |
> |
ambdiv, ambssamp, ambres); |
890 |
> |
if (octname != NULL) |
891 |
> |
fputs(octname, ambfp); |
892 |
> |
fputc('\n', ambfp); |
893 |
> |
fprintf(ambfp, "SOFTWARE= %s\n", VersionID); |
894 |
> |
fputnow(ambfp); |
895 |
> |
fputformat(AMBFMT, ambfp); |
896 |
> |
fputc('\n', ambfp); |
897 |
> |
putambmagic(ambfp); |
898 |
> |
} else if (checkheader(ambfp, AMBFMT, NULL) < 0 || !hasambmagic(ambfp)) |
899 |
> |
error(USER, "bad ambient file"); |
900 |
> |
} |
901 |
> |
|
902 |
> |
|
903 |
> |
static void |
904 |
> |
avsave( /* insert and save an ambient value */ |
905 |
> |
AMBVAL *av |
906 |
> |
) |
907 |
> |
{ |
908 |
> |
avinsert(avstore(av)); |
909 |
> |
if (ambfp == NULL) |
910 |
> |
return; |
911 |
> |
if (writambval(av, ambfp) < 0) |
912 |
> |
goto writerr; |
913 |
> |
if (++nunflshed >= AMBFLUSH) |
914 |
> |
if (ambsync() == EOF) |
915 |
> |
goto writerr; |
916 |
> |
return; |
917 |
> |
writerr: |
918 |
> |
error(SYSTEM, "error writing to ambient file"); |
919 |
> |
} |
920 |
> |
|
921 |
> |
|
922 |
> |
static AMBVAL * |
923 |
> |
avstore( /* allocate memory and store aval */ |
924 |
> |
AMBVAL *aval |
925 |
> |
) |
926 |
> |
{ |
927 |
> |
AMBVAL *av; |
928 |
> |
double d; |
929 |
> |
|
930 |
> |
if ((av = newambval()) == NULL) |
931 |
> |
error(SYSTEM, "out of memory in avstore"); |
932 |
> |
*av = *aval; |
933 |
> |
av->latick = ambclock; |
934 |
> |
av->next = NULL; |
935 |
> |
nambvals++; |
936 |
> |
d = bright(av->val); |
937 |
> |
if (d > FTINY) { /* add to log sum for averaging */ |
938 |
> |
avsum += log(d); |
939 |
> |
navsum++; |
940 |
|
} |
941 |
< |
/* sort the divisions */ |
942 |
< |
qsort(div, ne, sizeof(AMBSAMP), ambcmp); |
943 |
< |
/* skim excess */ |
944 |
< |
while (ne > ns) { |
945 |
< |
ne--; |
946 |
< |
addcolor(acol, div[ne].v); |
941 |
> |
return(av); |
942 |
> |
} |
943 |
> |
|
944 |
> |
|
945 |
> |
#define ATALLOCSZ 512 /* #/8 trees to allocate at once */ |
946 |
> |
|
947 |
> |
static AMBTREE *atfreelist = NULL; /* free ambient tree structures */ |
948 |
> |
|
949 |
> |
|
950 |
> |
static AMBTREE * |
951 |
> |
newambtree(void) /* allocate 8 ambient tree structs */ |
952 |
> |
{ |
953 |
> |
AMBTREE *atp, *upperlim; |
954 |
> |
|
955 |
> |
if (atfreelist == NULL) { /* get more nodes */ |
956 |
> |
atfreelist = (AMBTREE *)malloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
957 |
> |
if (atfreelist == NULL) |
958 |
> |
return(NULL); |
959 |
> |
/* link new free list */ |
960 |
> |
upperlim = atfreelist + 8*(ATALLOCSZ-1); |
961 |
> |
for (atp = atfreelist; atp < upperlim; atp += 8) |
962 |
> |
atp->kid = atp + 8; |
963 |
> |
atp->kid = NULL; |
964 |
|
} |
965 |
< |
/* super-sample */ |
966 |
< |
for (i = ns; i > 0; i--) { |
967 |
< |
rayorigin(&ar, r, AMBIENT, 0.5); /* pretested */ |
968 |
< |
zd = sqrt((div[0].t+frandom())/nt); |
969 |
< |
phi = 2.0*PI * (div[0].p+frandom())/np; |
371 |
< |
xd = cos(phi) * zd; |
372 |
< |
yd = sin(phi) * zd; |
373 |
< |
zd = sqrt(1.0 - zd*zd); |
374 |
< |
for (k = 0; k < 3; k++) |
375 |
< |
ar.rdir[k] = xd*ux[k]+yd*uy[k]+zd*r->ron[k]; |
376 |
< |
rayvalue(&ar); |
377 |
< |
if (ar.rot < FHUGE) |
378 |
< |
arad += 1.0 / ar.rot; |
379 |
< |
/* recompute error */ |
380 |
< |
copycolor(dnew.v, div[0].v); |
381 |
< |
addcolor(dnew.v, ar.rcol); |
382 |
< |
dnew.n = div[0].n + 1; |
383 |
< |
dnew.t = div[0].t; dnew.p = div[0].p; |
384 |
< |
b2 = bright(dnew.v)/dnew.n - bright(ar.rcol); |
385 |
< |
b2 = b2*b2 + div[0].k*(div[0].n*div[0].n); |
386 |
< |
dnew.k = b2/(dnew.n*dnew.n); |
387 |
< |
/* reinsert */ |
388 |
< |
for (k = 0; k < ne-1 && dnew.k < div[k+1].k; k++) |
389 |
< |
bcopy(&div[k+1], &div[k], sizeof(AMBSAMP)); |
390 |
< |
bcopy(&dnew, &div[k], sizeof(AMBSAMP)); |
965 |
> |
atp = atfreelist; |
966 |
> |
atfreelist = atp->kid; |
967 |
> |
memset((char *)atp, '\0', 8*sizeof(AMBTREE)); |
968 |
> |
return(atp); |
969 |
> |
} |
970 |
|
|
971 |
< |
if (ne >= i) { /* extract darkest division */ |
972 |
< |
ne--; |
973 |
< |
if (div[ne].n > 1) |
974 |
< |
scalecolor(div[ne].v, 1.0/div[ne].n); |
975 |
< |
addcolor(acol, div[ne].v); |
976 |
< |
} |
971 |
> |
|
972 |
> |
static void |
973 |
> |
freeambtree( /* free 8 ambient tree structs */ |
974 |
> |
AMBTREE *atp |
975 |
> |
) |
976 |
> |
{ |
977 |
> |
atp->kid = atfreelist; |
978 |
> |
atfreelist = atp; |
979 |
> |
} |
980 |
> |
|
981 |
> |
|
982 |
> |
static void |
983 |
> |
unloadatree( /* unload an ambient value tree */ |
984 |
> |
AMBTREE *at, |
985 |
> |
unloadtf_t *f |
986 |
> |
) |
987 |
> |
{ |
988 |
> |
AMBVAL *av; |
989 |
> |
int i; |
990 |
> |
/* transfer values at this node */ |
991 |
> |
for (av = at->alist; av != NULL; av = at->alist) { |
992 |
> |
at->alist = av->next; |
993 |
> |
(*f)(av); |
994 |
|
} |
995 |
< |
scalecolor(acol, 1.0/ndivs); |
996 |
< |
if (arad <= FTINY) |
997 |
< |
arad = FHUGE; |
998 |
< |
else |
999 |
< |
arad = (ndivs+ns) / arad / sqrt(r->rweight); |
1000 |
< |
if (arad > maxarad) |
405 |
< |
arad = maxarad; |
406 |
< |
else if (arad < minarad) |
407 |
< |
arad = minarad; |
408 |
< |
if (ns > 0) |
409 |
< |
free((char *)div); |
410 |
< |
return(arad); |
995 |
> |
if (at->kid == NULL) |
996 |
> |
return; |
997 |
> |
for (i = 0; i < 8; i++) /* transfer and free children */ |
998 |
> |
unloadatree(at->kid+i, f); |
999 |
> |
freeambtree(at->kid); |
1000 |
> |
at->kid = NULL; |
1001 |
|
} |
1002 |
|
|
1003 |
|
|
1004 |
+ |
static struct avl { |
1005 |
+ |
AMBVAL *p; |
1006 |
+ |
unsigned long t; |
1007 |
+ |
} *avlist1; /* ambient value list with ticks */ |
1008 |
+ |
static AMBVAL **avlist2; /* memory positions for sorting */ |
1009 |
+ |
static int i_avlist; /* index for lists */ |
1010 |
+ |
|
1011 |
+ |
static int alatcmp(const void *av1, const void *av2); |
1012 |
+ |
|
1013 |
+ |
static void |
1014 |
+ |
avfree(AMBVAL *av) |
1015 |
+ |
{ |
1016 |
+ |
free(av); |
1017 |
+ |
} |
1018 |
+ |
|
1019 |
+ |
static void |
1020 |
+ |
av2list( |
1021 |
+ |
AMBVAL *av |
1022 |
+ |
) |
1023 |
+ |
{ |
1024 |
+ |
#ifdef DEBUG |
1025 |
+ |
if (i_avlist >= nambvals) |
1026 |
+ |
error(CONSISTENCY, "too many ambient values in av2list1"); |
1027 |
+ |
#endif |
1028 |
+ |
avlist1[i_avlist].p = avlist2[i_avlist] = (AMBVAL*)av; |
1029 |
+ |
avlist1[i_avlist++].t = av->latick; |
1030 |
+ |
} |
1031 |
+ |
|
1032 |
+ |
|
1033 |
|
static int |
1034 |
< |
ambcmp(d1, d2) /* decreasing order */ |
1035 |
< |
AMBSAMP *d1, *d2; |
1034 |
> |
alatcmp( /* compare ambient values for MRA */ |
1035 |
> |
const void *av1, |
1036 |
> |
const void *av2 |
1037 |
> |
) |
1038 |
|
{ |
1039 |
< |
if (d1->k < d2->k) |
1040 |
< |
return(1); |
1041 |
< |
if (d1->k > d2->k) |
1039 |
> |
long lc = ((struct avl *)av2)->t - ((struct avl *)av1)->t; |
1040 |
> |
return(lc<0 ? -1 : lc>0 ? 1 : 0); |
1041 |
> |
} |
1042 |
> |
|
1043 |
> |
|
1044 |
> |
/* GW NOTE 2002/10/3: |
1045 |
> |
* I used to compare AMBVAL pointers, but found that this was the |
1046 |
> |
* cause of a serious consistency error with gcc, since the optimizer |
1047 |
> |
* uses some dangerous trick in pointer subtraction that |
1048 |
> |
* assumes pointers differ by exact struct size increments. |
1049 |
> |
*/ |
1050 |
> |
static int |
1051 |
> |
aposcmp( /* compare ambient value positions */ |
1052 |
> |
const void *avp1, |
1053 |
> |
const void *avp2 |
1054 |
> |
) |
1055 |
> |
{ |
1056 |
> |
long diff = *(char * const *)avp1 - *(char * const *)avp2; |
1057 |
> |
if (diff < 0) |
1058 |
|
return(-1); |
1059 |
< |
return(0); |
1059 |
> |
return(diff > 0); |
1060 |
|
} |
1061 |
|
|
1062 |
|
|
1063 |
< |
static |
1064 |
< |
avsave(av) /* save an ambient value */ |
1065 |
< |
AMBVAL *av; |
1063 |
> |
static int |
1064 |
> |
avlmemi( /* find list position from address */ |
1065 |
> |
AMBVAL *avaddr |
1066 |
> |
) |
1067 |
|
{ |
1068 |
< |
#ifdef AMBFLUSH |
1069 |
< |
static int nunflshed = 0; |
1070 |
< |
#endif |
1071 |
< |
if (ambfp == NULL) |
1068 |
> |
AMBVAL **avlpp; |
1069 |
> |
|
1070 |
> |
avlpp = (AMBVAL **)bsearch((char *)&avaddr, (char *)avlist2, |
1071 |
> |
nambvals, sizeof(AMBVAL *), &aposcmp); |
1072 |
> |
if (avlpp == NULL) |
1073 |
> |
error(CONSISTENCY, "address not found in avlmemi"); |
1074 |
> |
return(avlpp - avlist2); |
1075 |
> |
} |
1076 |
> |
|
1077 |
> |
|
1078 |
> |
static void |
1079 |
> |
sortambvals( /* resort ambient values */ |
1080 |
> |
int always |
1081 |
> |
) |
1082 |
> |
{ |
1083 |
> |
AMBTREE oldatrunk; |
1084 |
> |
AMBVAL tav, *tap, *pnext; |
1085 |
> |
int i, j; |
1086 |
> |
/* see if it's time yet */ |
1087 |
> |
if (!always && (ambclock++ < lastsort+sortintvl || |
1088 |
> |
nambvals < SORT_THRESH)) |
1089 |
|
return; |
1090 |
< |
if (fwrite(av, sizeof(AMBVAL), 1, ambfp) != 1) |
1091 |
< |
goto writerr; |
1092 |
< |
#ifdef AMBFLUSH |
1093 |
< |
if (++nunflshed >= AMBFLUSH) { |
1094 |
< |
if (fflush(ambfp) == EOF) |
1095 |
< |
goto writerr; |
1096 |
< |
nunflshed = 0; |
1090 |
> |
/* |
1091 |
> |
* The idea here is to minimize memory thrashing |
1092 |
> |
* in VM systems by improving reference locality. |
1093 |
> |
* We do this by periodically sorting our stored ambient |
1094 |
> |
* values in memory in order of most recently to least |
1095 |
> |
* recently accessed. This ordering was chosen so that new |
1096 |
> |
* ambient values (which tend to be less important) go into |
1097 |
> |
* higher memory with the infrequently accessed values. |
1098 |
> |
* Since we expect our values to need sorting less |
1099 |
> |
* frequently as the process continues, we double our |
1100 |
> |
* waiting interval after each call. |
1101 |
> |
* This routine is also called by setambacc() with |
1102 |
> |
* the "always" parameter set to 1 so that the ambient |
1103 |
> |
* tree will be rebuilt with the new accuracy parameter. |
1104 |
> |
*/ |
1105 |
> |
if (tracktime) { /* allocate pointer arrays to sort */ |
1106 |
> |
avlist2 = (AMBVAL **)malloc(nambvals*sizeof(AMBVAL *)); |
1107 |
> |
avlist1 = (struct avl *)malloc(nambvals*sizeof(struct avl)); |
1108 |
> |
} else { |
1109 |
> |
avlist2 = NULL; |
1110 |
> |
avlist1 = NULL; |
1111 |
|
} |
1112 |
+ |
if (avlist1 == NULL) { /* no time tracking -- rebuild tree? */ |
1113 |
+ |
if (avlist2 != NULL) |
1114 |
+ |
free((void *)avlist2); |
1115 |
+ |
if (always) { /* rebuild without sorting */ |
1116 |
+ |
oldatrunk = atrunk; |
1117 |
+ |
atrunk.alist = NULL; |
1118 |
+ |
atrunk.kid = NULL; |
1119 |
+ |
unloadatree(&oldatrunk, &avinsert); |
1120 |
+ |
} |
1121 |
+ |
} else { /* sort memory by last access time */ |
1122 |
+ |
/* |
1123 |
+ |
* Sorting memory is tricky because it isn't contiguous. |
1124 |
+ |
* We have to sort an array of pointers by MRA and also |
1125 |
+ |
* by memory position. We then copy values in "loops" |
1126 |
+ |
* to minimize memory hits. Nevertheless, we will visit |
1127 |
+ |
* everyone at least twice, and this is an expensive process |
1128 |
+ |
* when we're thrashing, which is when we need to do it. |
1129 |
+ |
*/ |
1130 |
+ |
#ifdef DEBUG |
1131 |
+ |
sprintf(errmsg, "sorting %u ambient values at ambclock=%lu...", |
1132 |
+ |
nambvals, ambclock); |
1133 |
+ |
eputs(errmsg); |
1134 |
|
#endif |
1135 |
< |
return; |
1136 |
< |
writerr: |
1137 |
< |
error(SYSTEM, "error writing ambient file"); |
1135 |
> |
i_avlist = 0; |
1136 |
> |
unloadatree(&atrunk, &av2list); /* empty current tree */ |
1137 |
> |
#ifdef DEBUG |
1138 |
> |
if (i_avlist < nambvals) |
1139 |
> |
error(CONSISTENCY, "missing ambient values in sortambvals"); |
1140 |
> |
#endif |
1141 |
> |
qsort((char *)avlist1, nambvals, sizeof(struct avl), &alatcmp); |
1142 |
> |
qsort((char *)avlist2, nambvals, sizeof(AMBVAL *), &aposcmp); |
1143 |
> |
for (i = 0; i < nambvals; i++) { |
1144 |
> |
if (avlist1[i].p == NULL) |
1145 |
> |
continue; |
1146 |
> |
tap = avlist2[i]; |
1147 |
> |
tav = *tap; |
1148 |
> |
for (j = i; (pnext = avlist1[j].p) != tap; |
1149 |
> |
j = avlmemi(pnext)) { |
1150 |
> |
*(avlist2[j]) = *pnext; |
1151 |
> |
avinsert(avlist2[j]); |
1152 |
> |
avlist1[j].p = NULL; |
1153 |
> |
} |
1154 |
> |
*(avlist2[j]) = tav; |
1155 |
> |
avinsert(avlist2[j]); |
1156 |
> |
avlist1[j].p = NULL; |
1157 |
> |
} |
1158 |
> |
free((void *)avlist1); |
1159 |
> |
free((void *)avlist2); |
1160 |
> |
/* compute new sort interval */ |
1161 |
> |
sortintvl = ambclock - lastsort; |
1162 |
> |
if (sortintvl >= MAX_SORT_INTVL/2) |
1163 |
> |
sortintvl = MAX_SORT_INTVL; |
1164 |
> |
else |
1165 |
> |
sortintvl <<= 1; /* wait twice as long next */ |
1166 |
> |
#ifdef DEBUG |
1167 |
> |
eputs("done\n"); |
1168 |
> |
#endif |
1169 |
> |
} |
1170 |
> |
if (ambclock >= MAXACLOCK) |
1171 |
> |
ambclock = MAXACLOCK/2; |
1172 |
> |
lastsort = ambclock; |
1173 |
|
} |
1174 |
|
|
1175 |
|
|
1176 |
< |
static |
1177 |
< |
avinsert(aval, at, c0, s) /* insert ambient value in a tree */ |
1178 |
< |
AMBVAL *aval; |
1179 |
< |
register AMBTREE *at; |
1180 |
< |
FVECT c0; |
1181 |
< |
double s; |
1176 |
> |
#ifdef F_SETLKW |
1177 |
> |
|
1178 |
> |
static void |
1179 |
> |
aflock( /* lock/unlock ambient file */ |
1180 |
> |
int typ |
1181 |
> |
) |
1182 |
|
{ |
1183 |
< |
FVECT ck0; |
458 |
< |
int branch; |
459 |
< |
register AMBVAL *av; |
460 |
< |
register int i; |
1183 |
> |
static struct flock fls; /* static so initialized to zeroes */ |
1184 |
|
|
1185 |
< |
if ((av = newambval()) == NULL) |
1186 |
< |
goto memerr; |
1187 |
< |
bcopy(aval, av, sizeof(AMBVAL)); |
1188 |
< |
VCOPY(ck0, c0); |
1189 |
< |
while (s*(OCTSCALE/2) > av->rad*ambacc) { |
1190 |
< |
if (at->kid == NULL) |
1191 |
< |
if ((at->kid = newambtree()) == NULL) |
1192 |
< |
goto memerr; |
1193 |
< |
s *= 0.5; |
1194 |
< |
branch = 0; |
1195 |
< |
for (i = 0; i < 3; i++) |
1196 |
< |
if (av->pos[i] > ck0[i] + s) { |
1197 |
< |
ck0[i] += s; |
1198 |
< |
branch |= 1 << i; |
1185 |
> |
if (typ == fls.l_type) /* already called? */ |
1186 |
> |
return; |
1187 |
> |
fls.l_type = typ; |
1188 |
> |
if (fcntl(fileno(ambfp), F_SETLKW, &fls) < 0) |
1189 |
> |
error(SYSTEM, "cannot (un)lock ambient file"); |
1190 |
> |
} |
1191 |
> |
|
1192 |
> |
|
1193 |
> |
int |
1194 |
> |
ambsync(void) /* synchronize ambient file */ |
1195 |
> |
{ |
1196 |
> |
long flen; |
1197 |
> |
AMBVAL avs; |
1198 |
> |
int n; |
1199 |
> |
|
1200 |
> |
if (ambfp == NULL) /* no ambient file? */ |
1201 |
> |
return(0); |
1202 |
> |
/* gain appropriate access */ |
1203 |
> |
aflock(nunflshed ? F_WRLCK : F_RDLCK); |
1204 |
> |
/* see if file has grown */ |
1205 |
> |
if ((flen = lseek(fileno(ambfp), (off_t)0, SEEK_END)) < 0) |
1206 |
> |
goto seekerr; |
1207 |
> |
if ((n = flen - lastpos) > 0) { /* file has grown */ |
1208 |
> |
if (ambinp == NULL) { /* use duplicate filedes */ |
1209 |
> |
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
1210 |
> |
if (ambinp == NULL) |
1211 |
> |
error(SYSTEM, "fdopen failed in ambsync"); |
1212 |
> |
} |
1213 |
> |
if (fseek(ambinp, lastpos, SEEK_SET) < 0) |
1214 |
> |
goto seekerr; |
1215 |
> |
while (n >= AMBVALSIZ) { /* load contributed values */ |
1216 |
> |
if (!readambval(&avs, ambinp)) { |
1217 |
> |
sprintf(errmsg, |
1218 |
> |
"ambient file \"%s\" corrupted near character %ld", |
1219 |
> |
ambfile, flen - n); |
1220 |
> |
error(WARNING, errmsg); |
1221 |
> |
break; |
1222 |
|
} |
1223 |
< |
at = at->kid + branch; |
1223 |
> |
avinsert(avstore(&avs)); |
1224 |
> |
n -= AMBVALSIZ; |
1225 |
> |
} |
1226 |
> |
lastpos = flen - n; |
1227 |
> |
/*** seek always as safety measure |
1228 |
> |
if (n) ***/ /* alignment */ |
1229 |
> |
if (lseek(fileno(ambfp), (off_t)lastpos, SEEK_SET) < 0) |
1230 |
> |
goto seekerr; |
1231 |
|
} |
1232 |
< |
av->next = at->alist; |
1233 |
< |
at->alist = av; |
1234 |
< |
return; |
1235 |
< |
memerr: |
1236 |
< |
error(SYSTEM, "out of memory in avinsert"); |
1232 |
> |
n = fflush(ambfp); /* calls write() at last */ |
1233 |
> |
if (n != EOF) |
1234 |
> |
lastpos += (long)nunflshed*AMBVALSIZ; |
1235 |
> |
else if ((lastpos = lseek(fileno(ambfp), (off_t)0, SEEK_CUR)) < 0) |
1236 |
> |
goto seekerr; |
1237 |
> |
|
1238 |
> |
aflock(F_UNLCK); /* release file */ |
1239 |
> |
nunflshed = 0; |
1240 |
> |
return(n); |
1241 |
> |
seekerr: |
1242 |
> |
error(SYSTEM, "seek failed in ambsync"); |
1243 |
> |
return -1; /* pro forma return */ |
1244 |
|
} |
1245 |
+ |
|
1246 |
+ |
#else /* ! F_SETLKW */ |
1247 |
+ |
|
1248 |
+ |
int |
1249 |
+ |
ambsync(void) /* flush ambient file */ |
1250 |
+ |
{ |
1251 |
+ |
if (ambfp == NULL) |
1252 |
+ |
return(0); |
1253 |
+ |
nunflshed = 0; |
1254 |
+ |
return(fflush(ambfp)); |
1255 |
+ |
} |
1256 |
+ |
|
1257 |
+ |
#endif /* ! F_SETLKW */ |