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/* Copyright (c) 1986 Regents of the University of California */ |
| 2 |
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|
| 1 |
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#ifndef lint |
| 2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
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> |
static const char RCSid[] = "$Id$"; |
| 3 |
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#endif |
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|
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/* |
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* ambient.c - routines dealing with ambient (inter-reflected) component. |
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* |
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< |
* The macro AMBFLUSH (if defined) is the number of ambient values |
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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 |
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*/ |
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|
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#include "copyright.h" |
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|
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#include "platform.h" |
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#include "ray.h" |
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+ |
#include "otypes.h" |
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#include "ambient.h" |
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+ |
#include "random.h" |
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|
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< |
#include "octree.h" |
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> |
#ifndef OCTSCALE |
| 19 |
> |
#define OCTSCALE 1.0 /* ceil((valid rad.)/(cube size)) */ |
| 20 |
> |
#endif |
| 21 |
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|
| 22 |
< |
#include "random.h" |
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> |
extern char *shm_boundary; /* memory sharing boundary */ |
| 23 |
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|
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< |
#define OCTSCALE 0.5 /* ceil((valid rad.)/(cube size)) */ |
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> |
#define MAXASET 511 /* maximum number of elements in ambient set */ |
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> |
OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
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|
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< |
extern CUBE thescene; /* contains space boundaries */ |
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> |
double maxarad; /* maximum ambient radius */ |
| 28 |
> |
double minarad; /* minimum ambient radius */ |
| 29 |
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|
| 30 |
< |
extern COLOR ambval; /* global ambient component */ |
| 27 |
< |
extern double ambacc; /* ambient accuracy */ |
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< |
extern int ambres; /* ambient resolution */ |
| 29 |
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extern int ambdiv; /* number of divisions for calculation */ |
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< |
extern int ambssamp; /* number of super-samples */ |
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< |
extern int ambounce; /* number of ambient bounces */ |
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< |
extern char *amblist[]; /* ambient include/exclude list */ |
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< |
extern int ambincl; /* include == 1, exclude == 0 */ |
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> |
static AMBTREE atrunk; /* our ambient trunk node */ |
| 31 |
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|
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< |
OBJECT ambset[128]; /* ambient include/exclude set */ |
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> |
static FILE *ambfp = NULL; /* ambient file pointer */ |
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> |
static int nunflshed = 0; /* number of unflushed ambient values */ |
| 34 |
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|
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< |
double maxarad; /* maximum ambient radius */ |
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< |
double minarad; /* minimum ambient radius */ |
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> |
#ifndef SORT_THRESH |
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> |
#ifdef SMLMEM |
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> |
#define SORT_THRESH ((3L<<20)/sizeof(AMBVAL)) |
| 38 |
> |
#else |
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> |
#define SORT_THRESH ((9L<<20)/sizeof(AMBVAL)) |
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> |
#endif |
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> |
#endif |
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> |
#ifndef SORT_INTVL |
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> |
#define SORT_INTVL (SORT_THRESH<<1) |
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> |
#endif |
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> |
#ifndef MAX_SORT_INTVL |
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> |
#define MAX_SORT_INTVL (SORT_INTVL<<6) |
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> |
#endif |
| 48 |
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|
| 49 |
< |
typedef struct ambval { |
| 50 |
< |
FVECT pos; /* position in space */ |
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< |
FVECT dir; /* normal direction */ |
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< |
int lvl; /* recursion level of parent ray */ |
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< |
float weight; /* weight of parent ray */ |
| 54 |
< |
COLOR val; /* computed ambient value */ |
| 55 |
< |
float rad; /* validity radius */ |
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< |
struct ambval *next; /* next in list */ |
| 57 |
< |
} AMBVAL; /* ambient value */ |
| 49 |
> |
static double avsum = 0.; /* computed ambient value sum (log) */ |
| 50 |
> |
static unsigned int navsum = 0; /* number of values in avsum */ |
| 51 |
> |
static unsigned int nambvals = 0; /* total number of indirect values */ |
| 52 |
> |
static unsigned int nambshare = 0; /* number of values from file */ |
| 53 |
> |
static unsigned long ambclock = 0; /* ambient access clock */ |
| 54 |
> |
static unsigned long lastsort = 0; /* time of last value sort */ |
| 55 |
> |
static long sortintvl = SORT_INTVL; /* time until next sort */ |
| 56 |
> |
static FILE *ambinp = NULL; /* auxiliary file for input */ |
| 57 |
> |
static long lastpos = -1; /* last flush position */ |
| 58 |
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|
| 59 |
< |
typedef struct ambtree { |
| 60 |
< |
AMBVAL *alist; /* ambient value list */ |
| 61 |
< |
struct ambtree *kid; /* 8 child nodes */ |
| 62 |
< |
} AMBTREE; /* ambient octree */ |
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> |
#define MAXACLOCK (1L<<30) /* clock turnover value */ |
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> |
/* |
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> |
* Track access times unless we are sharing ambient values |
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> |
* through memory on a multiprocessor, when we want to avoid |
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> |
* claiming our own memory (copy on write). Go ahead anyway |
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> |
* if more than two thirds of our values are unshared. |
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> |
* Compile with -Dtracktime=0 to turn this code off. |
| 66 |
> |
*/ |
| 67 |
> |
#ifndef tracktime |
| 68 |
> |
#define tracktime (shm_boundary == NULL || nambvals > 3*nambshare) |
| 69 |
> |
#endif |
| 70 |
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|
| 71 |
< |
typedef struct { |
| 56 |
< |
float k; /* error contribution per sample */ |
| 57 |
< |
COLOR v; /* ray sum */ |
| 58 |
< |
int n; /* number of samples */ |
| 59 |
< |
short t, p; /* theta, phi indices */ |
| 60 |
< |
} AMBSAMP; /* ambient sample */ |
| 71 |
> |
#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
| 72 |
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|
| 73 |
< |
static AMBTREE atrunk; /* our ambient trunk node */ |
| 73 |
> |
#define newambval() (AMBVAL *)malloc(sizeof(AMBVAL)) |
| 74 |
> |
#define freeav(av) free((void *)av); |
| 75 |
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|
| 76 |
< |
static FILE *ambfp = NULL; /* ambient file pointer */ |
| 76 |
> |
static void initambfile(), avsave(), avinsert(), sortambvals(), unloadatree(); |
| 77 |
> |
static int avlmemi(); |
| 78 |
> |
static AMBVAL *avstore(); |
| 79 |
> |
#ifdef F_SETLKW |
| 80 |
> |
static void aflock(); |
| 81 |
> |
#endif |
| 82 |
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|
| 66 |
– |
#define newambval() (AMBVAL *)bmalloc(sizeof(AMBVAL)) |
| 83 |
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|
| 84 |
< |
#define newambtree() (AMBTREE *)calloc(8, sizeof(AMBTREE)) |
| 84 |
> |
void |
| 85 |
> |
setambres(ar) /* set ambient resolution */ |
| 86 |
> |
int ar; |
| 87 |
> |
{ |
| 88 |
> |
ambres = ar < 0 ? 0 : ar; /* may be done already */ |
| 89 |
> |
/* set min & max radii */ |
| 90 |
> |
if (ar <= 0) { |
| 91 |
> |
minarad = 0; |
| 92 |
> |
maxarad = thescene.cusize / 2.0; |
| 93 |
> |
} else { |
| 94 |
> |
minarad = thescene.cusize / ar; |
| 95 |
> |
maxarad = 64 * minarad; /* heuristic */ |
| 96 |
> |
if (maxarad > thescene.cusize / 2.0) |
| 97 |
> |
maxarad = thescene.cusize / 2.0; |
| 98 |
> |
} |
| 99 |
> |
if (minarad <= FTINY) |
| 100 |
> |
minarad = 10*FTINY; |
| 101 |
> |
if (maxarad <= minarad) |
| 102 |
> |
maxarad = 64 * minarad; |
| 103 |
> |
} |
| 104 |
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|
| 70 |
– |
double sumambient(), doambient(), makeambient(); |
| 105 |
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|
| 106 |
+ |
void |
| 107 |
+ |
setambacc(newa) /* set ambient accuracy */ |
| 108 |
+ |
double newa; |
| 109 |
+ |
{ |
| 110 |
+ |
double ambdiff; |
| 111 |
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|
| 112 |
< |
setambient(afile) /* initialize calculation */ |
| 113 |
< |
char *afile; |
| 112 |
> |
if (newa < 0.0) |
| 113 |
> |
newa = 0.0; |
| 114 |
> |
ambdiff = fabs(newa - ambacc); |
| 115 |
> |
if (ambdiff >= .01 && (ambacc = newa) > FTINY && nambvals > 0) |
| 116 |
> |
sortambvals(1); /* rebuild tree */ |
| 117 |
> |
} |
| 118 |
> |
|
| 119 |
> |
|
| 120 |
> |
void |
| 121 |
> |
setambient() /* initialize calculation */ |
| 122 |
|
{ |
| 123 |
< |
long ftell(); |
| 124 |
< |
char **amblp; |
| 125 |
< |
OBJECT obj; |
| 126 |
< |
AMBVAL amb; |
| 127 |
< |
/* set up ambient set */ |
| 128 |
< |
ambset[0] = 0; |
| 129 |
< |
for (amblp = amblist; *amblp != NULL; amblp++) { |
| 130 |
< |
if ((obj = modifier(*amblp)) == OVOID) { |
| 131 |
< |
sprintf(errmsg, "unknown %s modifier \"%s\"", |
| 132 |
< |
ambincl ? "include" : "exclude", *amblp); |
| 123 |
> |
int readonly = 0; |
| 124 |
> |
long pos, flen; |
| 125 |
> |
AMBVAL amb; |
| 126 |
> |
/* make sure we're fresh */ |
| 127 |
> |
ambdone(); |
| 128 |
> |
/* init ambient limits */ |
| 129 |
> |
setambres(ambres); |
| 130 |
> |
setambacc(ambacc); |
| 131 |
> |
if (ambfile == NULL || !ambfile[0]) |
| 132 |
> |
return; |
| 133 |
> |
if (ambacc <= FTINY) { |
| 134 |
> |
sprintf(errmsg, "zero ambient accuracy so \"%s\" not opened", |
| 135 |
> |
ambfile); |
| 136 |
> |
error(WARNING, errmsg); |
| 137 |
> |
return; |
| 138 |
> |
} |
| 139 |
> |
/* open ambient file */ |
| 140 |
> |
if ((ambfp = fopen(ambfile, "r+")) == NULL) |
| 141 |
> |
readonly = (ambfp = fopen(ambfile, "r")) != NULL; |
| 142 |
> |
if (ambfp != NULL) { |
| 143 |
> |
initambfile(0); /* file exists */ |
| 144 |
> |
pos = ftell(ambfp); |
| 145 |
> |
while (readambval(&amb, ambfp)) |
| 146 |
> |
avinsert(avstore(&amb)); |
| 147 |
> |
nambshare = nambvals; /* share loaded values */ |
| 148 |
> |
if (readonly) { |
| 149 |
> |
sprintf(errmsg, |
| 150 |
> |
"loaded %u values from read-only ambient file", |
| 151 |
> |
nambvals); |
| 152 |
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error(WARNING, errmsg); |
| 153 |
< |
continue; |
| 153 |
> |
fclose(ambfp); /* close file so no writes */ |
| 154 |
> |
ambfp = NULL; |
| 155 |
> |
return; /* avoid ambsync() */ |
| 156 |
|
} |
| 157 |
< |
if (!inset(ambset, obj)) |
| 158 |
< |
insertelem(ambset, obj); |
| 157 |
> |
/* align file pointer */ |
| 158 |
> |
pos += (long)nambvals*AMBVALSIZ; |
| 159 |
> |
flen = lseek(fileno(ambfp), (off_t)0L, 2); |
| 160 |
> |
if (flen != pos) { |
| 161 |
> |
sprintf(errmsg, |
| 162 |
> |
"ignoring last %ld values in ambient file (corrupted)", |
| 163 |
> |
(flen - pos)/AMBVALSIZ); |
| 164 |
> |
error(WARNING, errmsg); |
| 165 |
> |
fseek(ambfp, pos, 0); |
| 166 |
> |
#ifndef _WIN32 /* XXX we need a replacement for that one */ |
| 167 |
> |
ftruncate(fileno(ambfp), (off_t)pos); |
| 168 |
> |
#endif |
| 169 |
> |
} |
| 170 |
> |
} else if ((ambfp = fopen(ambfile, "w+")) != NULL) { |
| 171 |
> |
initambfile(1); /* else create new file */ |
| 172 |
> |
} else { |
| 173 |
> |
sprintf(errmsg, "cannot open ambient file \"%s\"", ambfile); |
| 174 |
> |
error(SYSTEM, errmsg); |
| 175 |
|
} |
| 176 |
< |
maxarad = thescene.cusize / 2.0; /* maximum radius */ |
| 177 |
< |
/* minimum radius */ |
| 178 |
< |
minarad = ambres > 0 ? thescene.cusize/ambres : 0.0; |
| 176 |
> |
nunflshed++; /* lie */ |
| 177 |
> |
ambsync(); |
| 178 |
> |
} |
| 179 |
|
|
| 180 |
< |
/* open ambient file */ |
| 181 |
< |
if (afile != NULL) |
| 182 |
< |
if ((ambfp = fopen(afile, "r+")) != NULL) { |
| 183 |
< |
while (fread(&amb, sizeof(AMBVAL), 1, ambfp) == 1) |
| 184 |
< |
avinsert(&amb, &atrunk, thescene.cuorg, |
| 185 |
< |
thescene.cusize); |
| 186 |
< |
/* align */ |
| 187 |
< |
fseek(ambfp, -(ftell(ambfp)%sizeof(AMBVAL)), 1); |
| 188 |
< |
} else if ((ambfp = fopen(afile, "w")) == NULL) { |
| 189 |
< |
sprintf(errmsg, "cannot open ambient file \"%s\"", |
| 190 |
< |
afile); |
| 107 |
< |
error(SYSTEM, errmsg); |
| 180 |
> |
|
| 181 |
> |
void |
| 182 |
> |
ambdone() /* close ambient file and free memory */ |
| 183 |
> |
{ |
| 184 |
> |
if (ambfp != NULL) { /* close ambient file */ |
| 185 |
> |
ambsync(); |
| 186 |
> |
fclose(ambfp); |
| 187 |
> |
ambfp = NULL; |
| 188 |
> |
if (ambinp != NULL) { |
| 189 |
> |
fclose(ambinp); |
| 190 |
> |
ambinp = NULL; |
| 191 |
|
} |
| 192 |
+ |
lastpos = -1; |
| 193 |
+ |
} |
| 194 |
+ |
/* free ambient tree */ |
| 195 |
+ |
unloadatree(&atrunk, free); |
| 196 |
+ |
/* reset state variables */ |
| 197 |
+ |
avsum = 0.; |
| 198 |
+ |
navsum = 0; |
| 199 |
+ |
nambvals = 0; |
| 200 |
+ |
nambshare = 0; |
| 201 |
+ |
ambclock = 0; |
| 202 |
+ |
lastsort = 0; |
| 203 |
+ |
sortintvl = SORT_INTVL; |
| 204 |
|
} |
| 205 |
|
|
| 206 |
|
|
| 207 |
< |
ambient(acol, r) /* compute ambient component for ray */ |
| 207 |
> |
void |
| 208 |
> |
ambnotify(obj) /* record new modifier */ |
| 209 |
> |
OBJECT obj; |
| 210 |
> |
{ |
| 211 |
> |
static int hitlimit = 0; |
| 212 |
> |
register OBJREC *o; |
| 213 |
> |
register char **amblp; |
| 214 |
> |
|
| 215 |
> |
if (obj == OVOID) { /* starting over */ |
| 216 |
> |
ambset[0] = 0; |
| 217 |
> |
hitlimit = 0; |
| 218 |
> |
return; |
| 219 |
> |
} |
| 220 |
> |
o = objptr(obj); |
| 221 |
> |
if (hitlimit || !ismodifier(o->otype)) |
| 222 |
> |
return; |
| 223 |
> |
for (amblp = amblist; *amblp != NULL; amblp++) |
| 224 |
> |
if (!strcmp(o->oname, *amblp)) { |
| 225 |
> |
if (ambset[0] >= MAXASET) { |
| 226 |
> |
error(WARNING, "too many modifiers in ambient list"); |
| 227 |
> |
hitlimit++; |
| 228 |
> |
return; /* should this be fatal? */ |
| 229 |
> |
} |
| 230 |
> |
insertelem(ambset, obj); |
| 231 |
> |
return; |
| 232 |
> |
} |
| 233 |
> |
} |
| 234 |
> |
|
| 235 |
> |
|
| 236 |
> |
void |
| 237 |
> |
ambient(acol, r, nrm) /* compute ambient component for ray */ |
| 238 |
|
COLOR acol; |
| 239 |
|
register RAY *r; |
| 240 |
+ |
FVECT nrm; |
| 241 |
|
{ |
| 242 |
|
static int rdepth = 0; /* ambient recursion */ |
| 243 |
< |
double wsum; |
| 243 |
> |
double d, l; |
| 244 |
|
|
| 119 |
– |
rdepth++; /* increment level */ |
| 120 |
– |
|
| 245 |
|
if (ambdiv <= 0) /* no ambient calculation */ |
| 246 |
|
goto dumbamb; |
| 247 |
|
/* check number of bounces */ |
| 248 |
< |
if (rdepth > ambounce) |
| 248 |
> |
if (rdepth >= ambounce) |
| 249 |
|
goto dumbamb; |
| 250 |
|
/* check ambient list */ |
| 251 |
|
if (ambincl != -1 && r->ro != NULL && |
| 253 |
|
goto dumbamb; |
| 254 |
|
|
| 255 |
|
if (ambacc <= FTINY) { /* no ambient storage */ |
| 256 |
< |
if (doambient(acol, r) == 0.0) |
| 256 |
> |
rdepth++; |
| 257 |
> |
d = doambient(acol, r, r->rweight, NULL, NULL); |
| 258 |
> |
rdepth--; |
| 259 |
> |
if (d <= FTINY) |
| 260 |
|
goto dumbamb; |
| 261 |
< |
goto done; |
| 261 |
> |
return; |
| 262 |
|
} |
| 263 |
+ |
|
| 264 |
+ |
if (tracktime) /* sort to minimize thrashing */ |
| 265 |
+ |
sortambvals(0); |
| 266 |
|
/* get ambient value */ |
| 267 |
|
setcolor(acol, 0.0, 0.0, 0.0); |
| 268 |
< |
wsum = sumambient(acol, r, &atrunk, thescene.cuorg, thescene.cusize); |
| 269 |
< |
if (wsum > FTINY) |
| 270 |
< |
scalecolor(acol, 1.0/wsum); |
| 271 |
< |
else if (makeambient(acol, r) == 0.0) |
| 272 |
< |
goto dumbamb; |
| 273 |
< |
goto done; |
| 274 |
< |
|
| 268 |
> |
d = sumambient(acol, r, nrm, rdepth, |
| 269 |
> |
&atrunk, thescene.cuorg, thescene.cusize); |
| 270 |
> |
if (d > FTINY) { |
| 271 |
> |
scalecolor(acol, 1.0/d); |
| 272 |
> |
return; |
| 273 |
> |
} |
| 274 |
> |
rdepth++; /* need to cache new value */ |
| 275 |
> |
d = makeambient(acol, r, nrm, rdepth-1); |
| 276 |
> |
rdepth--; |
| 277 |
> |
if (d > FTINY) |
| 278 |
> |
return; |
| 279 |
|
dumbamb: /* return global value */ |
| 280 |
|
copycolor(acol, ambval); |
| 281 |
< |
done: /* must finish here! */ |
| 282 |
< |
rdepth--; |
| 281 |
> |
if (ambvwt <= 0 | navsum == 0) |
| 282 |
> |
return; |
| 283 |
> |
l = bright(ambval); /* average in computations */ |
| 284 |
> |
if (l > FTINY) { |
| 285 |
> |
d = (log(l)*(double)ambvwt + avsum) / |
| 286 |
> |
(double)(ambvwt + navsum); |
| 287 |
> |
d = exp(d) / l; |
| 288 |
> |
scalecolor(acol, d); /* apply color of ambval */ |
| 289 |
> |
} else { |
| 290 |
> |
d = exp( avsum / (double)navsum ); |
| 291 |
> |
setcolor(acol, d, d, d); /* neutral color */ |
| 292 |
> |
} |
| 293 |
|
} |
| 294 |
|
|
| 295 |
|
|
| 296 |
|
double |
| 297 |
< |
sumambient(acol, r, at, c0, s) /* get interpolated ambient value */ |
| 297 |
> |
sumambient(acol, r, rn, al, at, c0, s) /* get interpolated ambient value */ |
| 298 |
|
COLOR acol; |
| 299 |
|
register RAY *r; |
| 300 |
< |
AMBTREE *at; |
| 300 |
> |
FVECT rn; |
| 301 |
> |
int al; |
| 302 |
> |
AMBTREE *at; |
| 303 |
|
FVECT c0; |
| 304 |
< |
double s; |
| 304 |
> |
double s; |
| 305 |
|
{ |
| 306 |
< |
extern double sqrt(); |
| 161 |
< |
double d, e1, e2, wt, wsum; |
| 306 |
> |
double d, e1, e2, wt, wsum; |
| 307 |
|
COLOR ct; |
| 308 |
|
FVECT ck0; |
| 309 |
|
int i; |
| 310 |
|
register int j; |
| 311 |
< |
register AMBVAL *av; |
| 312 |
< |
/* do this node */ |
| 311 |
> |
register AMBVAL *av; |
| 312 |
> |
|
| 313 |
|
wsum = 0.0; |
| 314 |
+ |
/* do this node */ |
| 315 |
|
for (av = at->alist; av != NULL; av = av->next) { |
| 316 |
+ |
double rn_dot = -2.0; |
| 317 |
+ |
if (tracktime) |
| 318 |
+ |
av->latick = ambclock; |
| 319 |
|
/* |
| 320 |
< |
* Ray strength test. |
| 320 |
> |
* Ambient level test. |
| 321 |
|
*/ |
| 322 |
< |
if (av->lvl > r->rlvl || av->weight < r->rweight-FTINY) |
| 322 |
> |
if (av->lvl > al) /* list sorted, so this works */ |
| 323 |
> |
break; |
| 324 |
> |
if (av->weight < r->rweight-FTINY) |
| 325 |
|
continue; |
| 326 |
|
/* |
| 327 |
|
* Ambient radius test. |
| 328 |
|
*/ |
| 329 |
< |
e1 = 0.0; |
| 330 |
< |
for (j = 0; j < 3; j++) { |
| 331 |
< |
d = av->pos[j] - r->rop[j]; |
| 332 |
< |
e1 += d * d; |
| 333 |
< |
} |
| 329 |
> |
d = av->pos[0] - r->rop[0]; |
| 330 |
> |
e1 = d * d; |
| 331 |
> |
d = av->pos[1] - r->rop[1]; |
| 332 |
> |
e1 += d * d; |
| 333 |
> |
d = av->pos[2] - r->rop[2]; |
| 334 |
> |
e1 += d * d; |
| 335 |
|
e1 /= av->rad * av->rad; |
| 336 |
|
if (e1 > ambacc*ambacc*1.21) |
| 337 |
|
continue; |
| 338 |
|
/* |
| 339 |
< |
* Normal direction test. |
| 339 |
> |
* Direction test using closest normal. |
| 340 |
|
*/ |
| 341 |
< |
e2 = (1.0 - DOT(av->dir, r->ron)) * r->rweight; |
| 341 |
> |
d = DOT(av->dir, r->ron); |
| 342 |
> |
if (rn != r->ron) { |
| 343 |
> |
rn_dot = DOT(av->dir, rn); |
| 344 |
> |
if (rn_dot > 1.0-FTINY) |
| 345 |
> |
rn_dot = 1.0-FTINY; |
| 346 |
> |
if (rn_dot >= d-FTINY) { |
| 347 |
> |
d = rn_dot; |
| 348 |
> |
rn_dot = -2.0; |
| 349 |
> |
} |
| 350 |
> |
} |
| 351 |
> |
e2 = (1.0 - d) * r->rweight; |
| 352 |
|
if (e2 < 0.0) e2 = 0.0; |
| 353 |
|
if (e1 + e2 > ambacc*ambacc*1.21) |
| 354 |
|
continue; |
| 359 |
|
for (j = 0; j < 3; j++) |
| 360 |
|
d += (r->rop[j] - av->pos[j]) * |
| 361 |
|
(av->dir[j] + r->ron[j]); |
| 362 |
< |
if (d < -minarad) |
| 362 |
> |
if (d*0.5 < -minarad*ambacc-.001) |
| 363 |
|
continue; |
| 364 |
|
/* |
| 365 |
|
* Jittering final test reduces image artifacts. |
| 366 |
|
*/ |
| 367 |
< |
wt = sqrt(e1) + sqrt(e2); |
| 368 |
< |
if (wt > ambacc*(0.9 + 0.2*frandom())) |
| 367 |
> |
e1 = sqrt(e1); |
| 368 |
> |
e2 = sqrt(e2); |
| 369 |
> |
wt = e1 + e2; |
| 370 |
> |
if (wt > ambacc*(.9+.2*urand(9015+samplendx))) |
| 371 |
|
continue; |
| 372 |
+ |
/* |
| 373 |
+ |
* Recompute directional error using perturbed normal |
| 374 |
+ |
*/ |
| 375 |
+ |
if (rn_dot > 0.0) { |
| 376 |
+ |
e2 = sqrt((1.0 - rn_dot)*r->rweight); |
| 377 |
+ |
wt = e1 + e2; |
| 378 |
+ |
} |
| 379 |
|
if (wt <= 1e-3) |
| 380 |
|
wt = 1e3; |
| 381 |
|
else |
| 382 |
|
wt = 1.0 / wt; |
| 383 |
|
wsum += wt; |
| 384 |
< |
copycolor(ct, av->val); |
| 384 |
> |
extambient(ct, av, r->rop, rn); |
| 385 |
|
scalecolor(ct, wt); |
| 386 |
|
addcolor(acol, ct); |
| 387 |
|
} |
| 400 |
|
break; |
| 401 |
|
} |
| 402 |
|
if (j == 3) |
| 403 |
< |
wsum += sumambient(acol, r, at->kid+i, ck0, s); |
| 403 |
> |
wsum += sumambient(acol, r, rn, al, at->kid+i, ck0, s); |
| 404 |
|
} |
| 405 |
|
return(wsum); |
| 406 |
|
} |
| 407 |
|
|
| 408 |
|
|
| 409 |
|
double |
| 410 |
< |
makeambient(acol, r) /* make a new ambient value */ |
| 410 |
> |
makeambient(acol, r, rn, al) /* make a new ambient value */ |
| 411 |
|
COLOR acol; |
| 412 |
|
register RAY *r; |
| 413 |
+ |
FVECT rn; |
| 414 |
+ |
int al; |
| 415 |
|
{ |
| 416 |
< |
AMBVAL amb; |
| 417 |
< |
|
| 418 |
< |
amb.rad = doambient(acol, r); /* compute ambient */ |
| 419 |
< |
if (amb.rad == 0.0) |
| 416 |
> |
AMBVAL amb; |
| 417 |
> |
FVECT gp, gd; |
| 418 |
> |
/* compute weight */ |
| 419 |
> |
amb.weight = pow(AVGREFL, (double)al); |
| 420 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic */ |
| 421 |
> |
amb.weight = r->rweight; |
| 422 |
> |
/* compute ambient */ |
| 423 |
> |
amb.rad = doambient(acol, r, amb.weight, gp, gd); |
| 424 |
> |
if (amb.rad <= FTINY) |
| 425 |
|
return(0.0); |
| 426 |
|
/* store it */ |
| 427 |
|
VCOPY(amb.pos, r->rop); |
| 428 |
|
VCOPY(amb.dir, r->ron); |
| 429 |
< |
amb.lvl = r->rlvl; |
| 252 |
< |
amb.weight = r->rweight; |
| 429 |
> |
amb.lvl = al; |
| 430 |
|
copycolor(amb.val, acol); |
| 431 |
+ |
VCOPY(amb.gpos, gp); |
| 432 |
+ |
VCOPY(amb.gdir, gd); |
| 433 |
|
/* insert into tree */ |
| 434 |
< |
avinsert(&amb, &atrunk, thescene.cuorg, thescene.cusize); |
| 435 |
< |
avsave(&amb); /* write to file */ |
| 434 |
> |
avsave(&amb); /* and save to file */ |
| 435 |
> |
if (rn != r->ron) |
| 436 |
> |
extambient(acol, &amb, r->rop, rn); /* texture */ |
| 437 |
|
return(amb.rad); |
| 438 |
|
} |
| 439 |
|
|
| 440 |
|
|
| 441 |
< |
double |
| 442 |
< |
doambient(acol, r) /* compute ambient component */ |
| 443 |
< |
COLOR acol; |
| 444 |
< |
register RAY *r; |
| 441 |
> |
void |
| 442 |
> |
extambient(cr, ap, pv, nv) /* extrapolate value at pv, nv */ |
| 443 |
> |
COLOR cr; |
| 444 |
> |
register AMBVAL *ap; |
| 445 |
> |
FVECT pv, nv; |
| 446 |
|
{ |
| 447 |
< |
extern int ambcmp(); |
| 448 |
< |
extern double sin(), cos(), sqrt(); |
| 449 |
< |
double phi, xd, yd, zd; |
| 269 |
< |
double b, b2; |
| 270 |
< |
register AMBSAMP *div; |
| 271 |
< |
AMBSAMP dnew; |
| 272 |
< |
RAY ar; |
| 273 |
< |
FVECT ux, uy; |
| 274 |
< |
double arad; |
| 275 |
< |
int ndivs, nt, np, ns, ne, i, j; |
| 276 |
< |
register int k; |
| 447 |
> |
FVECT v1; |
| 448 |
> |
register int i; |
| 449 |
> |
double d; |
| 450 |
|
|
| 451 |
< |
setcolor(acol, 0.0, 0.0, 0.0); |
| 452 |
< |
/* set number of divisions */ |
| 453 |
< |
nt = sqrt(ambdiv * r->rweight * 0.5) + 0.5; |
| 454 |
< |
np = 2 * nt; |
| 455 |
< |
ndivs = nt * np; |
| 456 |
< |
/* check first */ |
| 457 |
< |
if (ndivs == 0 || rayorigin(&ar, r, AMBIENT, 0.5) < 0) |
| 458 |
< |
return(0.0); |
| 459 |
< |
/* set number of super-samples */ |
| 460 |
< |
ns = ambssamp * r->rweight + 0.5; |
| 288 |
< |
if (ns > 0) { |
| 289 |
< |
div = (AMBSAMP *)malloc(ndivs*sizeof(AMBSAMP)); |
| 290 |
< |
if (div == NULL) |
| 291 |
< |
error(SYSTEM, "out of memory in doambient"); |
| 451 |
> |
d = 1.0; /* zeroeth order */ |
| 452 |
> |
/* gradient due to translation */ |
| 453 |
> |
for (i = 0; i < 3; i++) |
| 454 |
> |
d += ap->gpos[i]*(pv[i]-ap->pos[i]); |
| 455 |
> |
/* gradient due to rotation */ |
| 456 |
> |
VCROSS(v1, ap->dir, nv); |
| 457 |
> |
d += DOT(ap->gdir, v1); |
| 458 |
> |
if (d <= 0.0) { |
| 459 |
> |
setcolor(cr, 0.0, 0.0, 0.0); |
| 460 |
> |
return; |
| 461 |
|
} |
| 462 |
< |
/* make axes */ |
| 463 |
< |
uy[0] = uy[1] = uy[2] = 0.0; |
| 295 |
< |
for (k = 0; k < 3; k++) |
| 296 |
< |
if (r->ron[k] < 0.6 && r->ron[k] > -0.6) |
| 297 |
< |
break; |
| 298 |
< |
uy[k] = 1.0; |
| 299 |
< |
fcross(ux, r->ron, uy); |
| 300 |
< |
normalize(ux); |
| 301 |
< |
fcross(uy, ux, r->ron); |
| 302 |
< |
/* sample divisions */ |
| 303 |
< |
arad = 0.0; |
| 304 |
< |
ne = 0; |
| 305 |
< |
for (i = 0; i < nt; i++) |
| 306 |
< |
for (j = 0; j < np; j++) { |
| 307 |
< |
rayorigin(&ar, r, AMBIENT, 0.5); /* pretested */ |
| 308 |
< |
zd = sqrt((i+frandom())/nt); |
| 309 |
< |
phi = 2.0*PI * (j+frandom())/np; |
| 310 |
< |
xd = cos(phi) * zd; |
| 311 |
< |
yd = sin(phi) * zd; |
| 312 |
< |
zd = sqrt(1.0 - zd*zd); |
| 313 |
< |
for (k = 0; k < 3; k++) |
| 314 |
< |
ar.rdir[k] = xd*ux[k]+yd*uy[k]+zd*r->ron[k]; |
| 315 |
< |
rayvalue(&ar); |
| 316 |
< |
if (ar.rot < FHUGE) |
| 317 |
< |
arad += 1.0 / ar.rot; |
| 318 |
< |
if (ns > 0) { /* save division */ |
| 319 |
< |
div[ne].k = 0.0; |
| 320 |
< |
copycolor(div[ne].v, ar.rcol); |
| 321 |
< |
div[ne].n = 0; |
| 322 |
< |
div[ne].t = i; div[ne].p = j; |
| 323 |
< |
/* sum errors */ |
| 324 |
< |
b = bright(ar.rcol); |
| 325 |
< |
if (i > 0) { /* from above */ |
| 326 |
< |
b2 = bright(div[ne-np].v) - b; |
| 327 |
< |
b2 *= b2 * 0.25; |
| 328 |
< |
div[ne].k += b2; |
| 329 |
< |
div[ne].n++; |
| 330 |
< |
div[ne-np].k += b2; |
| 331 |
< |
div[ne-np].n++; |
| 332 |
< |
} |
| 333 |
< |
if (j > 0) { /* from behind */ |
| 334 |
< |
b2 = bright(div[ne-1].v) - b; |
| 335 |
< |
b2 *= b2 * 0.25; |
| 336 |
< |
div[ne].k += b2; |
| 337 |
< |
div[ne].n++; |
| 338 |
< |
div[ne-1].k += b2; |
| 339 |
< |
div[ne-1].n++; |
| 340 |
< |
} |
| 341 |
< |
if (j == np-1) { /* around */ |
| 342 |
< |
b2 = bright(div[ne-(np-1)].v) - b; |
| 343 |
< |
b2 *= b2 * 0.25; |
| 344 |
< |
div[ne].k += b2; |
| 345 |
< |
div[ne].n++; |
| 346 |
< |
div[ne-(np-1)].k += b2; |
| 347 |
< |
div[ne-(np-1)].n++; |
| 348 |
< |
} |
| 349 |
< |
ne++; |
| 350 |
< |
} else |
| 351 |
< |
addcolor(acol, ar.rcol); |
| 352 |
< |
} |
| 353 |
< |
for (k = 0; k < ne; k++) { /* compute errors */ |
| 354 |
< |
if (div[k].n > 1) |
| 355 |
< |
div[k].k /= div[k].n; |
| 356 |
< |
div[k].n = 1; |
| 357 |
< |
} |
| 358 |
< |
/* sort the divisions */ |
| 359 |
< |
qsort(div, ne, sizeof(AMBSAMP), ambcmp); |
| 360 |
< |
/* skim excess */ |
| 361 |
< |
while (ne > ns) { |
| 362 |
< |
ne--; |
| 363 |
< |
addcolor(acol, div[ne].v); |
| 364 |
< |
} |
| 365 |
< |
/* super-sample */ |
| 366 |
< |
for (i = ns; i > 0; i--) { |
| 367 |
< |
rayorigin(&ar, r, AMBIENT, 0.5); /* pretested */ |
| 368 |
< |
zd = sqrt((div[0].t+frandom())/nt); |
| 369 |
< |
phi = 2.0*PI * (div[0].p+frandom())/np; |
| 370 |
< |
xd = cos(phi) * zd; |
| 371 |
< |
yd = sin(phi) * zd; |
| 372 |
< |
zd = sqrt(1.0 - zd*zd); |
| 373 |
< |
for (k = 0; k < 3; k++) |
| 374 |
< |
ar.rdir[k] = xd*ux[k]+yd*uy[k]+zd*r->ron[k]; |
| 375 |
< |
rayvalue(&ar); |
| 376 |
< |
if (ar.rot < FHUGE) |
| 377 |
< |
arad += 1.0 / ar.rot; |
| 378 |
< |
/* recompute error */ |
| 379 |
< |
copycolor(dnew.v, div[0].v); |
| 380 |
< |
addcolor(dnew.v, ar.rcol); |
| 381 |
< |
dnew.n = div[0].n + 1; |
| 382 |
< |
dnew.t = div[0].t; dnew.p = div[0].p; |
| 383 |
< |
b2 = bright(dnew.v)/dnew.n - bright(ar.rcol); |
| 384 |
< |
b2 = b2*b2 + div[0].k*(div[0].n*div[0].n); |
| 385 |
< |
dnew.k = b2/(dnew.n*dnew.n); |
| 386 |
< |
/* reinsert */ |
| 387 |
< |
for (k = 0; k < ne-1 && dnew.k < div[k+1].k; k++) |
| 388 |
< |
bcopy(&div[k+1], &div[k], sizeof(AMBSAMP)); |
| 389 |
< |
bcopy(&dnew, &div[k], sizeof(AMBSAMP)); |
| 390 |
< |
|
| 391 |
< |
if (ne >= i) { /* extract darkest division */ |
| 392 |
< |
ne--; |
| 393 |
< |
if (div[ne].n > 1) |
| 394 |
< |
scalecolor(div[ne].v, 1.0/div[ne].n); |
| 395 |
< |
addcolor(acol, div[ne].v); |
| 396 |
< |
} |
| 397 |
< |
} |
| 398 |
< |
scalecolor(acol, 1.0/ndivs); |
| 399 |
< |
if (arad <= FTINY) |
| 400 |
< |
arad = FHUGE; |
| 401 |
< |
else |
| 402 |
< |
arad = (ndivs+ns) / arad / sqrt(r->rweight); |
| 403 |
< |
if (arad > maxarad) |
| 404 |
< |
arad = maxarad; |
| 405 |
< |
else if (arad < minarad) |
| 406 |
< |
arad = minarad; |
| 407 |
< |
if (ns > 0) |
| 408 |
< |
free((char *)div); |
| 409 |
< |
return(arad); |
| 462 |
> |
copycolor(cr, ap->val); |
| 463 |
> |
scalecolor(cr, d); |
| 464 |
|
} |
| 465 |
|
|
| 466 |
|
|
| 467 |
< |
static int |
| 468 |
< |
ambcmp(d1, d2) /* decreasing order */ |
| 469 |
< |
AMBSAMP *d1, *d2; |
| 467 |
> |
static void |
| 468 |
> |
initambfile(creat) /* initialize ambient file */ |
| 469 |
> |
int creat; |
| 470 |
|
{ |
| 471 |
< |
if (d1->k < d2->k) |
| 472 |
< |
return(1); |
| 473 |
< |
if (d1->k > d2->k) |
| 474 |
< |
return(-1); |
| 475 |
< |
return(0); |
| 471 |
> |
extern char *progname, *octname; |
| 472 |
> |
static char *mybuf = NULL; |
| 473 |
> |
|
| 474 |
> |
#ifdef F_SETLKW |
| 475 |
> |
aflock(creat ? F_WRLCK : F_RDLCK); |
| 476 |
> |
#endif |
| 477 |
> |
SET_FILE_BINARY(ambfp); |
| 478 |
> |
if (mybuf == NULL) |
| 479 |
> |
mybuf = (char *)bmalloc(BUFSIZ+8); |
| 480 |
> |
setbuf(ambfp, mybuf); |
| 481 |
> |
if (creat) { /* new file */ |
| 482 |
> |
newheader("RADIANCE", ambfp); |
| 483 |
> |
fprintf(ambfp, "%s -av %g %g %g -aw %d -ab %d -aa %g ", |
| 484 |
> |
progname, colval(ambval,RED), |
| 485 |
> |
colval(ambval,GRN), colval(ambval,BLU), |
| 486 |
> |
ambvwt, ambounce, ambacc); |
| 487 |
> |
fprintf(ambfp, "-ad %d -as %d -ar %d ", |
| 488 |
> |
ambdiv, ambssamp, ambres); |
| 489 |
> |
if (octname != NULL) |
| 490 |
> |
printargs(1, &octname, ambfp); |
| 491 |
> |
else |
| 492 |
> |
fputc('\n', ambfp); |
| 493 |
> |
fprintf(ambfp, "SOFTWARE= %s\n", VersionID); |
| 494 |
> |
fputnow(ambfp); |
| 495 |
> |
fputformat(AMBFMT, ambfp); |
| 496 |
> |
putc('\n', ambfp); |
| 497 |
> |
putambmagic(ambfp); |
| 498 |
> |
} else if (checkheader(ambfp, AMBFMT, NULL) < 0 || !hasambmagic(ambfp)) |
| 499 |
> |
error(USER, "bad ambient file"); |
| 500 |
|
} |
| 501 |
|
|
| 502 |
|
|
| 503 |
< |
static |
| 504 |
< |
avsave(av) /* save an ambient value */ |
| 505 |
< |
AMBVAL *av; |
| 503 |
> |
static void |
| 504 |
> |
avsave(av) /* insert and save an ambient value */ |
| 505 |
> |
AMBVAL *av; |
| 506 |
|
{ |
| 507 |
< |
#ifdef AMBFLUSH |
| 430 |
< |
static int nunflshed = 0; |
| 431 |
< |
#endif |
| 507 |
> |
avinsert(avstore(av)); |
| 508 |
|
if (ambfp == NULL) |
| 509 |
|
return; |
| 510 |
< |
if (fwrite(av, sizeof(AMBVAL), 1, ambfp) != 1) |
| 510 |
> |
if (writambval(av, ambfp) < 0) |
| 511 |
|
goto writerr; |
| 512 |
< |
#ifdef AMBFLUSH |
| 513 |
< |
if (++nunflshed >= AMBFLUSH) { |
| 438 |
< |
if (fflush(ambfp) == EOF) |
| 512 |
> |
if (++nunflshed >= AMBFLUSH) |
| 513 |
> |
if (ambsync() == EOF) |
| 514 |
|
goto writerr; |
| 440 |
– |
nunflshed = 0; |
| 441 |
– |
} |
| 442 |
– |
#endif |
| 515 |
|
return; |
| 516 |
|
writerr: |
| 517 |
< |
error(SYSTEM, "error writing ambient file"); |
| 517 |
> |
error(SYSTEM, "error writing to ambient file"); |
| 518 |
|
} |
| 519 |
|
|
| 520 |
|
|
| 521 |
< |
static |
| 522 |
< |
avinsert(aval, at, c0, s) /* insert ambient value in a tree */ |
| 523 |
< |
AMBVAL *aval; |
| 452 |
< |
register AMBTREE *at; |
| 453 |
< |
FVECT c0; |
| 454 |
< |
double s; |
| 521 |
> |
static AMBVAL * |
| 522 |
> |
avstore(aval) /* allocate memory and store aval */ |
| 523 |
> |
register AMBVAL *aval; |
| 524 |
|
{ |
| 525 |
+ |
register AMBVAL *av; |
| 526 |
+ |
double d; |
| 527 |
+ |
|
| 528 |
+ |
if ((av = newambval()) == NULL) |
| 529 |
+ |
error(SYSTEM, "out of memory in avstore"); |
| 530 |
+ |
copystruct(av, aval); |
| 531 |
+ |
av->latick = ambclock; |
| 532 |
+ |
av->next = NULL; |
| 533 |
+ |
nambvals++; |
| 534 |
+ |
d = bright(av->val); |
| 535 |
+ |
if (d > FTINY) { /* add to log sum for averaging */ |
| 536 |
+ |
avsum += log(d); |
| 537 |
+ |
navsum++; |
| 538 |
+ |
} |
| 539 |
+ |
return(av); |
| 540 |
+ |
} |
| 541 |
+ |
|
| 542 |
+ |
|
| 543 |
+ |
#define ATALLOCSZ 512 /* #/8 trees to allocate at once */ |
| 544 |
+ |
|
| 545 |
+ |
static AMBTREE *atfreelist = NULL; /* free ambient tree structures */ |
| 546 |
+ |
|
| 547 |
+ |
|
| 548 |
+ |
static AMBTREE * |
| 549 |
+ |
newambtree() /* allocate 8 ambient tree structs */ |
| 550 |
+ |
{ |
| 551 |
+ |
register AMBTREE *atp, *upperlim; |
| 552 |
+ |
|
| 553 |
+ |
if (atfreelist == NULL) { /* get more nodes */ |
| 554 |
+ |
atfreelist = (AMBTREE *)malloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
| 555 |
+ |
if (atfreelist == NULL) |
| 556 |
+ |
return(NULL); |
| 557 |
+ |
/* link new free list */ |
| 558 |
+ |
upperlim = atfreelist + 8*(ATALLOCSZ-1); |
| 559 |
+ |
for (atp = atfreelist; atp < upperlim; atp += 8) |
| 560 |
+ |
atp->kid = atp + 8; |
| 561 |
+ |
atp->kid = NULL; |
| 562 |
+ |
} |
| 563 |
+ |
atp = atfreelist; |
| 564 |
+ |
atfreelist = atp->kid; |
| 565 |
+ |
bzero((char *)atp, 8*sizeof(AMBTREE)); |
| 566 |
+ |
return(atp); |
| 567 |
+ |
} |
| 568 |
+ |
|
| 569 |
+ |
|
| 570 |
+ |
static void |
| 571 |
+ |
freeambtree(atp) /* free 8 ambient tree structs */ |
| 572 |
+ |
AMBTREE *atp; |
| 573 |
+ |
{ |
| 574 |
+ |
atp->kid = atfreelist; |
| 575 |
+ |
atfreelist = atp; |
| 576 |
+ |
} |
| 577 |
+ |
|
| 578 |
+ |
|
| 579 |
+ |
static void |
| 580 |
+ |
avinsert(av) /* insert ambient value in our tree */ |
| 581 |
+ |
register AMBVAL *av; |
| 582 |
+ |
{ |
| 583 |
+ |
register AMBTREE *at; |
| 584 |
+ |
register AMBVAL *ap; |
| 585 |
+ |
AMBVAL avh; |
| 586 |
|
FVECT ck0; |
| 587 |
+ |
double s; |
| 588 |
|
int branch; |
| 458 |
– |
register AMBVAL *av; |
| 589 |
|
register int i; |
| 590 |
|
|
| 591 |
< |
if ((av = newambval()) == NULL) |
| 592 |
< |
goto memerr; |
| 593 |
< |
bcopy(aval, av, sizeof(AMBVAL)); |
| 594 |
< |
VCOPY(ck0, c0); |
| 591 |
> |
if (av->rad <= FTINY) |
| 592 |
> |
error(CONSISTENCY, "zero ambient radius in avinsert"); |
| 593 |
> |
at = &atrunk; |
| 594 |
> |
VCOPY(ck0, thescene.cuorg); |
| 595 |
> |
s = thescene.cusize; |
| 596 |
|
while (s*(OCTSCALE/2) > av->rad*ambacc) { |
| 597 |
|
if (at->kid == NULL) |
| 598 |
|
if ((at->kid = newambtree()) == NULL) |
| 599 |
< |
goto memerr; |
| 599 |
> |
error(SYSTEM, "out of memory in avinsert"); |
| 600 |
|
s *= 0.5; |
| 601 |
|
branch = 0; |
| 602 |
|
for (i = 0; i < 3; i++) |
| 606 |
|
} |
| 607 |
|
at = at->kid + branch; |
| 608 |
|
} |
| 609 |
< |
av->next = at->alist; |
| 610 |
< |
at->alist = av; |
| 611 |
< |
return; |
| 612 |
< |
memerr: |
| 613 |
< |
error(SYSTEM, "out of memory in avinsert"); |
| 609 |
> |
avh.next = at->alist; /* order by increasing level */ |
| 610 |
> |
for (ap = &avh; ap->next != NULL; ap = ap->next) |
| 611 |
> |
if (ap->next->lvl >= av->lvl) |
| 612 |
> |
break; |
| 613 |
> |
av->next = ap->next; |
| 614 |
> |
ap->next = av; |
| 615 |
> |
at->alist = avh.next; |
| 616 |
|
} |
| 617 |
+ |
|
| 618 |
+ |
|
| 619 |
+ |
static void |
| 620 |
+ |
unloadatree(at, f) /* unload an ambient value tree */ |
| 621 |
+ |
register AMBTREE *at; |
| 622 |
+ |
void (*f)(); |
| 623 |
+ |
{ |
| 624 |
+ |
register AMBVAL *av; |
| 625 |
+ |
register int i; |
| 626 |
+ |
/* transfer values at this node */ |
| 627 |
+ |
for (av = at->alist; av != NULL; av = at->alist) { |
| 628 |
+ |
at->alist = av->next; |
| 629 |
+ |
(*f)(av); |
| 630 |
+ |
} |
| 631 |
+ |
if (at->kid == NULL) |
| 632 |
+ |
return; |
| 633 |
+ |
for (i = 0; i < 8; i++) /* transfer and free children */ |
| 634 |
+ |
unloadatree(at->kid+i, f); |
| 635 |
+ |
freeambtree(at->kid); |
| 636 |
+ |
at->kid = NULL; |
| 637 |
+ |
} |
| 638 |
+ |
|
| 639 |
+ |
|
| 640 |
+ |
static struct avl { |
| 641 |
+ |
AMBVAL *p; |
| 642 |
+ |
unsigned long t; |
| 643 |
+ |
} *avlist1; /* ambient value list with ticks */ |
| 644 |
+ |
static AMBVAL **avlist2; /* memory positions for sorting */ |
| 645 |
+ |
static int i_avlist; /* index for lists */ |
| 646 |
+ |
|
| 647 |
+ |
|
| 648 |
+ |
static int |
| 649 |
+ |
av2list(av) |
| 650 |
+ |
register AMBVAL *av; |
| 651 |
+ |
{ |
| 652 |
+ |
#ifdef DEBUG |
| 653 |
+ |
if (i_avlist >= nambvals) |
| 654 |
+ |
error(CONSISTENCY, "too many ambient values in av2list1"); |
| 655 |
+ |
#endif |
| 656 |
+ |
avlist1[i_avlist].p = avlist2[i_avlist] = av; |
| 657 |
+ |
avlist1[i_avlist++].t = av->latick; |
| 658 |
+ |
} |
| 659 |
+ |
|
| 660 |
+ |
|
| 661 |
+ |
static int |
| 662 |
+ |
alatcmp(av1, av2) /* compare ambient values for MRA */ |
| 663 |
+ |
struct avl *av1, *av2; |
| 664 |
+ |
{ |
| 665 |
+ |
register long lc = av2->t - av1->t; |
| 666 |
+ |
return(lc<0 ? -1 : lc>0 ? 1 : 0); |
| 667 |
+ |
} |
| 668 |
+ |
|
| 669 |
+ |
|
| 670 |
+ |
/* GW NOTE 2002/10/3: |
| 671 |
+ |
* I used to compare AMBVAL pointers, but found that this was the |
| 672 |
+ |
* cause of a serious consistency error with gcc, since the optimizer |
| 673 |
+ |
* uses some dangerous trick in pointer subtraction that |
| 674 |
+ |
* assumes pointers differ by exact struct size increments. |
| 675 |
+ |
*/ |
| 676 |
+ |
static int |
| 677 |
+ |
aposcmp(avp1, avp2) /* compare ambient value positions */ |
| 678 |
+ |
const void *avp1, *avp2; |
| 679 |
+ |
{ |
| 680 |
+ |
register long diff = *(char * const *)avp1 - *(char * const *)avp2; |
| 681 |
+ |
if (diff < 0) |
| 682 |
+ |
return(-1); |
| 683 |
+ |
return(diff > 0); |
| 684 |
+ |
} |
| 685 |
+ |
|
| 686 |
+ |
#if 1 |
| 687 |
+ |
static int |
| 688 |
+ |
avlmemi(avaddr) /* find list position from address */ |
| 689 |
+ |
AMBVAL *avaddr; |
| 690 |
+ |
{ |
| 691 |
+ |
register AMBVAL **avlpp; |
| 692 |
+ |
|
| 693 |
+ |
avlpp = (AMBVAL **)bsearch((char *)&avaddr, (char *)avlist2, |
| 694 |
+ |
nambvals, sizeof(AMBVAL *), aposcmp); |
| 695 |
+ |
if (avlpp == NULL) |
| 696 |
+ |
error(CONSISTENCY, "address not found in avlmemi"); |
| 697 |
+ |
return(avlpp - avlist2); |
| 698 |
+ |
} |
| 699 |
+ |
#else |
| 700 |
+ |
#define avlmemi(avaddr) ((AMBVAL **)bsearch((char *)&avaddr,(char *)avlist2, \ |
| 701 |
+ |
nambvals,sizeof(AMBVAL *),aposcmp) - avlist2) |
| 702 |
+ |
#endif |
| 703 |
+ |
|
| 704 |
+ |
|
| 705 |
+ |
static void |
| 706 |
+ |
sortambvals(always) /* resort ambient values */ |
| 707 |
+ |
int always; |
| 708 |
+ |
{ |
| 709 |
+ |
AMBTREE oldatrunk; |
| 710 |
+ |
AMBVAL tav, *tap, *pnext; |
| 711 |
+ |
register int i, j; |
| 712 |
+ |
/* see if it's time yet */ |
| 713 |
+ |
if (!always && (ambclock++ < lastsort+sortintvl || |
| 714 |
+ |
nambvals < SORT_THRESH)) |
| 715 |
+ |
return; |
| 716 |
+ |
/* |
| 717 |
+ |
* The idea here is to minimize memory thrashing |
| 718 |
+ |
* in VM systems by improving reference locality. |
| 719 |
+ |
* We do this by periodically sorting our stored ambient |
| 720 |
+ |
* values in memory in order of most recently to least |
| 721 |
+ |
* recently accessed. This ordering was chosen so that new |
| 722 |
+ |
* ambient values (which tend to be less important) go into |
| 723 |
+ |
* higher memory with the infrequently accessed values. |
| 724 |
+ |
* Since we expect our values to need sorting less |
| 725 |
+ |
* frequently as the process continues, we double our |
| 726 |
+ |
* waiting interval after each call. |
| 727 |
+ |
* This routine is also called by setambacc() with |
| 728 |
+ |
* the "always" parameter set to 1 so that the ambient |
| 729 |
+ |
* tree will be rebuilt with the new accuracy parameter. |
| 730 |
+ |
*/ |
| 731 |
+ |
if (tracktime) { /* allocate pointer arrays to sort */ |
| 732 |
+ |
avlist2 = (AMBVAL **)malloc(nambvals*sizeof(AMBVAL *)); |
| 733 |
+ |
avlist1 = (struct avl *)malloc(nambvals*sizeof(struct avl)); |
| 734 |
+ |
} else { |
| 735 |
+ |
avlist2 = NULL; |
| 736 |
+ |
avlist1 = NULL; |
| 737 |
+ |
} |
| 738 |
+ |
if (avlist1 == NULL) { /* no time tracking -- rebuild tree? */ |
| 739 |
+ |
if (avlist2 != NULL) |
| 740 |
+ |
free((void *)avlist2); |
| 741 |
+ |
if (always) { /* rebuild without sorting */ |
| 742 |
+ |
copystruct(&oldatrunk, &atrunk); |
| 743 |
+ |
atrunk.alist = NULL; |
| 744 |
+ |
atrunk.kid = NULL; |
| 745 |
+ |
unloadatree(&oldatrunk, avinsert); |
| 746 |
+ |
} |
| 747 |
+ |
} else { /* sort memory by last access time */ |
| 748 |
+ |
/* |
| 749 |
+ |
* Sorting memory is tricky because it isn't contiguous. |
| 750 |
+ |
* We have to sort an array of pointers by MRA and also |
| 751 |
+ |
* by memory position. We then copy values in "loops" |
| 752 |
+ |
* to minimize memory hits. Nevertheless, we will visit |
| 753 |
+ |
* everyone at least twice, and this is an expensive process |
| 754 |
+ |
* when we're thrashing, which is when we need to do it. |
| 755 |
+ |
*/ |
| 756 |
+ |
#ifdef DEBUG |
| 757 |
+ |
sprintf(errmsg, "sorting %u ambient values at ambclock=%lu...", |
| 758 |
+ |
nambvals, ambclock); |
| 759 |
+ |
eputs(errmsg); |
| 760 |
+ |
#endif |
| 761 |
+ |
i_avlist = 0; |
| 762 |
+ |
unloadatree(&atrunk, av2list); /* empty current tree */ |
| 763 |
+ |
#ifdef DEBUG |
| 764 |
+ |
if (i_avlist < nambvals) |
| 765 |
+ |
error(CONSISTENCY, "missing ambient values in sortambvals"); |
| 766 |
+ |
#endif |
| 767 |
+ |
qsort((char *)avlist1, nambvals, sizeof(struct avl), alatcmp); |
| 768 |
+ |
qsort((char *)avlist2, nambvals, sizeof(AMBVAL *), aposcmp); |
| 769 |
+ |
for (i = 0; i < nambvals; i++) { |
| 770 |
+ |
if (avlist1[i].p == NULL) |
| 771 |
+ |
continue; |
| 772 |
+ |
tap = avlist2[i]; |
| 773 |
+ |
copystruct(&tav, tap); |
| 774 |
+ |
for (j = i; (pnext = avlist1[j].p) != tap; |
| 775 |
+ |
j = avlmemi(pnext)) { |
| 776 |
+ |
copystruct(avlist2[j], pnext); |
| 777 |
+ |
avinsert(avlist2[j]); |
| 778 |
+ |
avlist1[j].p = NULL; |
| 779 |
+ |
} |
| 780 |
+ |
copystruct(avlist2[j], &tav); |
| 781 |
+ |
avinsert(avlist2[j]); |
| 782 |
+ |
avlist1[j].p = NULL; |
| 783 |
+ |
} |
| 784 |
+ |
free((void *)avlist1); |
| 785 |
+ |
free((void *)avlist2); |
| 786 |
+ |
/* compute new sort interval */ |
| 787 |
+ |
sortintvl = ambclock - lastsort; |
| 788 |
+ |
if (sortintvl >= MAX_SORT_INTVL/2) |
| 789 |
+ |
sortintvl = MAX_SORT_INTVL; |
| 790 |
+ |
else |
| 791 |
+ |
sortintvl <<= 1; /* wait twice as long next */ |
| 792 |
+ |
#ifdef DEBUG |
| 793 |
+ |
eputs("done\n"); |
| 794 |
+ |
#endif |
| 795 |
+ |
} |
| 796 |
+ |
if (ambclock >= MAXACLOCK) |
| 797 |
+ |
ambclock = MAXACLOCK/2; |
| 798 |
+ |
lastsort = ambclock; |
| 799 |
+ |
} |
| 800 |
+ |
|
| 801 |
+ |
|
| 802 |
+ |
#ifdef F_SETLKW |
| 803 |
+ |
|
| 804 |
+ |
static void |
| 805 |
+ |
aflock(typ) /* lock/unlock ambient file */ |
| 806 |
+ |
int typ; |
| 807 |
+ |
{ |
| 808 |
+ |
static struct flock fls; /* static so initialized to zeroes */ |
| 809 |
+ |
|
| 810 |
+ |
fls.l_type = typ; |
| 811 |
+ |
if (fcntl(fileno(ambfp), F_SETLKW, &fls) < 0) |
| 812 |
+ |
error(SYSTEM, "cannot (un)lock ambient file"); |
| 813 |
+ |
} |
| 814 |
+ |
|
| 815 |
+ |
|
| 816 |
+ |
int |
| 817 |
+ |
ambsync() /* synchronize ambient file */ |
| 818 |
+ |
{ |
| 819 |
+ |
long flen; |
| 820 |
+ |
AMBVAL avs; |
| 821 |
+ |
register int n; |
| 822 |
+ |
|
| 823 |
+ |
if (nunflshed == 0) |
| 824 |
+ |
return(0); |
| 825 |
+ |
if (lastpos < 0) /* initializing (locked in initambfile) */ |
| 826 |
+ |
goto syncend; |
| 827 |
+ |
/* gain exclusive access */ |
| 828 |
+ |
aflock(F_WRLCK); |
| 829 |
+ |
/* see if file has grown */ |
| 830 |
+ |
if ((flen = lseek(fileno(ambfp), (off_t)0L, 2)) < 0) |
| 831 |
+ |
goto seekerr; |
| 832 |
+ |
if (n = flen - lastpos) { /* file has grown */ |
| 833 |
+ |
if (ambinp == NULL) { /* use duplicate filedes */ |
| 834 |
+ |
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
| 835 |
+ |
if (ambinp == NULL) |
| 836 |
+ |
error(SYSTEM, "fdopen failed in ambsync"); |
| 837 |
+ |
} |
| 838 |
+ |
if (fseek(ambinp, lastpos, 0) < 0) |
| 839 |
+ |
goto seekerr; |
| 840 |
+ |
while (n >= AMBVALSIZ) { /* load contributed values */ |
| 841 |
+ |
if (!readambval(&avs, ambinp)) { |
| 842 |
+ |
sprintf(errmsg, |
| 843 |
+ |
"ambient file \"%s\" corrupted near character %ld", |
| 844 |
+ |
ambfile, flen - n); |
| 845 |
+ |
error(WARNING, errmsg); |
| 846 |
+ |
break; |
| 847 |
+ |
} |
| 848 |
+ |
avinsert(avstore(&avs)); |
| 849 |
+ |
n -= AMBVALSIZ; |
| 850 |
+ |
} |
| 851 |
+ |
/*** seek always as safety measure |
| 852 |
+ |
if (n) ***/ /* alignment */ |
| 853 |
+ |
if (lseek(fileno(ambfp), (off_t)(flen-n), 0) < 0) |
| 854 |
+ |
goto seekerr; |
| 855 |
+ |
} |
| 856 |
+ |
#ifdef DEBUG |
| 857 |
+ |
if (ambfp->_ptr - ambfp->_base != nunflshed*AMBVALSIZ) { |
| 858 |
+ |
sprintf(errmsg, "ambient file buffer at %d rather than %d", |
| 859 |
+ |
ambfp->_ptr - ambfp->_base, |
| 860 |
+ |
nunflshed*AMBVALSIZ); |
| 861 |
+ |
error(CONSISTENCY, errmsg); |
| 862 |
+ |
} |
| 863 |
+ |
#endif |
| 864 |
+ |
syncend: |
| 865 |
+ |
n = fflush(ambfp); /* calls write() at last */ |
| 866 |
+ |
if ((lastpos = lseek(fileno(ambfp), (off_t)0L, 1)) < 0) |
| 867 |
+ |
goto seekerr; |
| 868 |
+ |
aflock(F_UNLCK); /* release file */ |
| 869 |
+ |
nunflshed = 0; |
| 870 |
+ |
return(n); |
| 871 |
+ |
seekerr: |
| 872 |
+ |
error(SYSTEM, "seek failed in ambsync"); |
| 873 |
+ |
} |
| 874 |
+ |
|
| 875 |
+ |
#else |
| 876 |
+ |
|
| 877 |
+ |
int |
| 878 |
+ |
ambsync() /* flush ambient file */ |
| 879 |
+ |
{ |
| 880 |
+ |
if (nunflshed == 0) |
| 881 |
+ |
return(0); |
| 882 |
+ |
nunflshed = 0; |
| 883 |
+ |
return(fflush(ambfp)); |
| 884 |
+ |
} |
| 885 |
+ |
|
| 886 |
+ |
#endif |
