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/* Copyright (c) 1996 Regents of the University of California */ |
| 2 |
< |
|
| 3 |
< |
#ifndef lint |
| 4 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
< |
#endif |
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< |
|
| 1 |
> |
static const char RCSid[] = "$Id$"; |
| 2 |
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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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* Declarations of external symbols in ambient.h |
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*/ |
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|
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< |
#include "ray.h" |
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> |
#include "copyright.h" |
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|
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< |
#include "octree.h" |
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> |
#include <string.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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< |
|
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> |
#include "otspecial.h" |
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> |
#include "resolu.h" |
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#include "ambient.h" |
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– |
|
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#include "random.h" |
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+ |
#include "pmapamb.h" |
| 20 |
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|
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#ifndef OCTSCALE |
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#define OCTSCALE 1.0 /* ceil((valid rad.)/(cube size)) */ |
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#endif |
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|
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typedef struct ambtree { |
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AMBVAL *alist; /* ambient value list */ |
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struct ambtree *kid; /* 8 child nodes */ |
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} AMBTREE; /* ambient octree */ |
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|
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extern CUBE thescene; /* contains space boundaries */ |
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|
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extern char *shm_boundary; /* memory sharing boundary */ |
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|
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#define MAXASET 511 /* maximum number of elements in ambient set */ |
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> |
#ifndef MAXASET |
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> |
#define MAXASET 4095 /* maximum number of elements in ambient set */ |
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> |
#endif |
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OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
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|
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double maxarad; /* maximum ambient radius */ |
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static AMBTREE atrunk; /* our ambient trunk node */ |
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|
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static FILE *ambfp = NULL; /* ambient file pointer */ |
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static int nunflshed = 0; /* number of unflushed ambient values */ |
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> |
static int nunflshed; /* number of unflushed ambient values */ |
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> |
static FILE *ambinp = NULL; /* input pointer for ambient i/o */ |
| 38 |
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|
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– |
#ifndef SORT_THRESH |
| 46 |
– |
#ifdef BIGMEM |
| 47 |
– |
#define SORT_THRESH ((9L<<20)/sizeof(AMBVAL)) |
| 48 |
– |
#else |
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– |
#define SORT_THRESH ((3L<<20)/sizeof(AMBVAL)) |
| 50 |
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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 |
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– |
|
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static double avsum = 0.; /* computed ambient value sum (log) */ |
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static unsigned int navsum = 0; /* number of values in avsum */ |
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static unsigned int nambvals = 0; /* total number of indirect values */ |
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static unsigned int nambshare = 0; /* number of values from file */ |
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static unsigned long ambclock = 0; /* ambient access clock */ |
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< |
static unsigned long lastsort = 0; /* time of last value sort */ |
| 65 |
< |
static long sortintvl = SORT_INTVL; /* time until next sort */ |
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> |
static off_t lastpos = -1; /* last flush position */ |
| 43 |
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|
| 67 |
– |
#define MAXACLOCK (1L<<30) /* clock turnover value */ |
| 68 |
– |
/* |
| 69 |
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* Track access times unless we are sharing ambient values |
| 70 |
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* through memory on a multiprocessor, when we want to avoid |
| 71 |
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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. |
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*/ |
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#ifndef tracktime |
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#define tracktime (shm_boundary == NULL || nambvals > 3*nambshare) |
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#endif |
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|
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#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
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|
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< |
#define newambval() (AMBVAL *)bmalloc(sizeof(AMBVAL)) |
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> |
#define AVSIZE (sizeof(AMBVAL)-sizeof(SCOLOR)+sizeof(COLORV)*NCSAMP) |
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> |
#define newambval() (AMBVAL *)malloc(AVSIZE) |
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|
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extern long ftell(), lseek(); |
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static int initambfile(), avsave(), avinsert(), sortambvals(), avlmemi(); |
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static AMBVAL *avstore(); |
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#ifdef F_SETLKW |
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< |
static aflock(); |
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< |
#endif |
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> |
#define tfunc(x0, x, x1) (((x)-(x0))/((x1)-(x0))) |
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|
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+ |
static void initambfile(int cre8); |
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+ |
static void avsave(AMBVAL *av); |
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+ |
static AMBVAL *avstore(AMBVAL *aval); |
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+ |
static AMBTREE *newambtree(void); |
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+ |
static void freeambtree(AMBTREE *atp); |
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|
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< |
setambres(ar) /* set ambient resolution */ |
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int ar; |
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> |
typedef void unloadtf_t(AMBVAL *); |
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> |
static unloadtf_t avinsert; |
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> |
static unloadtf_t avfree; |
| 60 |
> |
static void unloadatree(AMBTREE *at, unloadtf_t *f); |
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> |
|
| 62 |
> |
static void sortambvals(void); |
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> |
|
| 64 |
> |
static int plugaleak(RAY *r, AMBVAL *ap, FVECT anorm, double ang); |
| 65 |
> |
static double sumambient(SCOLOR acol, RAY *r, FVECT rn, int al, |
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> |
AMBTREE *at, FVECT c0, double s); |
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> |
static int makeambient(SCOLOR acol, RAY *r, FVECT rn, int al); |
| 68 |
> |
static int extambient(SCOLOR cr, AMBVAL *ap, FVECT pv, FVECT nv, |
| 69 |
> |
FVECT uvw[3]); |
| 70 |
> |
|
| 71 |
> |
|
| 72 |
> |
void |
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> |
setambres( /* set ambient resolution */ |
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> |
int ar |
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> |
) |
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{ |
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ambres = ar < 0 ? 0 : ar; /* may be done already */ |
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/* set min & max radii */ |
| 79 |
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if (ar <= 0) { |
| 80 |
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minarad = 0; |
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< |
maxarad = thescene.cusize / 2.0; |
| 81 |
> |
maxarad = thescene.cusize*0.2; |
| 82 |
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} else { |
| 83 |
|
minarad = thescene.cusize / ar; |
| 84 |
< |
maxarad = 64 * minarad; /* heuristic */ |
| 85 |
< |
if (maxarad > thescene.cusize / 2.0) |
| 86 |
< |
maxarad = thescene.cusize / 2.0; |
| 84 |
> |
maxarad = 64.0 * minarad; /* heuristic */ |
| 85 |
> |
if (maxarad > thescene.cusize*0.2) |
| 86 |
> |
maxarad = thescene.cusize*0.2; |
| 87 |
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} |
| 88 |
|
if (minarad <= FTINY) |
| 89 |
< |
minarad = 10*FTINY; |
| 89 |
> |
minarad = 10.0*FTINY; |
| 90 |
|
if (maxarad <= minarad) |
| 91 |
< |
maxarad = 64 * minarad; |
| 91 |
> |
maxarad = 64.0 * minarad; |
| 92 |
|
} |
| 93 |
|
|
| 94 |
|
|
| 95 |
< |
setambacc(newa) /* set ambient accuracy */ |
| 96 |
< |
double newa; |
| 95 |
> |
void |
| 96 |
> |
setambacc( /* set ambient accuracy */ |
| 97 |
> |
double newa |
| 98 |
> |
) |
| 99 |
|
{ |
| 100 |
< |
double ambdiff; |
| 101 |
< |
|
| 102 |
< |
if (newa < 0.0) |
| 103 |
< |
newa = 0.0; |
| 104 |
< |
ambdiff = fabs(newa - ambacc); |
| 105 |
< |
if (ambdiff >= .01 && (ambacc = newa) > FTINY && nambvals > 0) |
| 106 |
< |
sortambvals(1); /* rebuild tree */ |
| 100 |
> |
static double olda; /* remember previous setting here */ |
| 101 |
> |
|
| 102 |
> |
newa *= (newa > 0); |
| 103 |
> |
if (fabs(newa - olda) >= .05*(newa + olda)) { |
| 104 |
> |
ambacc = newa; |
| 105 |
> |
if (ambacc > FTINY && nambvals > 0) |
| 106 |
> |
sortambvals(); /* rebuild tree */ |
| 107 |
> |
} |
| 108 |
|
} |
| 109 |
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|
| 110 |
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|
| 111 |
< |
setambient(afile) /* initialize calculation */ |
| 112 |
< |
char *afile; |
| 111 |
> |
void |
| 112 |
> |
setambient(void) /* initialize calculation */ |
| 113 |
|
{ |
| 114 |
< |
long pos, flen; |
| 114 |
> |
int exists; |
| 115 |
> |
off_t flen; |
| 116 |
|
AMBVAL amb; |
| 117 |
+ |
/* make sure we're fresh */ |
| 118 |
+ |
ambdone(); |
| 119 |
|
/* init ambient limits */ |
| 120 |
|
setambres(ambres); |
| 121 |
|
setambacc(ambacc); |
| 122 |
< |
if (afile == NULL) |
| 122 |
> |
if (ambfile == NULL || !ambfile[0]) |
| 123 |
|
return; |
| 124 |
|
if (ambacc <= FTINY) { |
| 125 |
|
sprintf(errmsg, "zero ambient accuracy so \"%s\" not opened", |
| 126 |
< |
afile); |
| 126 |
> |
ambfile); |
| 127 |
|
error(WARNING, errmsg); |
| 128 |
|
return; |
| 129 |
|
} |
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< |
/* open ambient file */ |
| 131 |
< |
if ((ambfp = fopen(afile, "r+")) != NULL) { |
| 132 |
< |
initambfile(0); |
| 133 |
< |
pos = ftell(ambfp); |
| 130 |
> |
exists = access(ambfile, F_OK) == 0; /* check existence, first */ |
| 131 |
> |
ambfp = fopen(ambfile, "a+"); /* try read/append */ |
| 132 |
> |
if (!exists & (ambfp == NULL)) { |
| 133 |
> |
sprintf(errmsg, "cannot create ambient file \"%s\"", ambfile); |
| 134 |
> |
error(SYSTEM, errmsg); |
| 135 |
> |
} |
| 136 |
> |
if (ambfp == NULL) { /* try opening read-only? */ |
| 137 |
> |
if ((ambfp = fopen(ambfile, "r")) == NULL) { |
| 138 |
> |
sprintf(errmsg, |
| 139 |
> |
"cannot open ambient file \"%s\" for reading", |
| 140 |
> |
ambfile); |
| 141 |
> |
error(SYSTEM, errmsg); |
| 142 |
> |
} |
| 143 |
> |
exists = -1; /* flag read-only */ |
| 144 |
> |
} else if (exists) |
| 145 |
> |
rewind(ambfp); /* XXX not necessary? */ |
| 146 |
> |
|
| 147 |
> |
if (exists) { |
| 148 |
> |
initambfile(0); /* file already exists */ |
| 149 |
> |
lastpos = ftell(ambfp); |
| 150 |
|
while (readambval(&amb, ambfp)) |
| 151 |
< |
avinsert(avstore(&amb)); |
| 152 |
< |
/* align */ |
| 148 |
< |
pos += (long)nambvals*AMBVALSIZ; |
| 149 |
< |
flen = lseek(fileno(ambfp), 0L, 2); |
| 150 |
< |
if (flen != pos) { |
| 151 |
> |
avstore(&amb); /* load what we can */ |
| 152 |
> |
if (exists < 0) { /* read-only? */ |
| 153 |
|
sprintf(errmsg, |
| 154 |
< |
"ignoring last %ld values in ambient file (corrupted)", |
| 155 |
< |
(flen - pos)/AMBVALSIZ); |
| 154 |
> |
"loaded %u values from read-only ambient file", |
| 155 |
> |
nambvals); |
| 156 |
|
error(WARNING, errmsg); |
| 157 |
< |
fseek(ambfp, pos, 0); |
| 158 |
< |
ftruncate(fileno(ambfp), pos); |
| 157 |
> |
fclose(ambfp); /* close file so no writes */ |
| 158 |
> |
ambfp = NULL; |
| 159 |
> |
return; |
| 160 |
|
} |
| 161 |
< |
nambshare = nambvals; |
| 162 |
< |
} else if ((ambfp = fopen(afile, "w+")) != NULL) |
| 163 |
< |
initambfile(1); |
| 164 |
< |
else { |
| 165 |
< |
sprintf(errmsg, "cannot open ambient file \"%s\"", afile); |
| 166 |
< |
error(SYSTEM, errmsg); |
| 161 |
> |
/* align file pointer */ |
| 162 |
> |
lastpos += (off_t)nambvals*AMBVALSIZ; |
| 163 |
> |
flen = lseek(fileno(ambfp), 0, SEEK_END); |
| 164 |
> |
if (flen != lastpos) { |
| 165 |
> |
sprintf(errmsg, |
| 166 |
> |
"ignoring last %lu values in ambient file (corrupted)", |
| 167 |
> |
(unsigned long)((flen - lastpos)/AMBVALSIZ)); |
| 168 |
> |
error(WARNING, errmsg); |
| 169 |
> |
/* fseek() not needed? */ |
| 170 |
> |
fseeko(ambfp, lastpos, SEEK_SET); |
| 171 |
> |
ftruncate(fileno(ambfp), lastpos); |
| 172 |
> |
} |
| 173 |
> |
} else { |
| 174 |
> |
initambfile(1); /* else start new file */ |
| 175 |
> |
fflush(ambfp); |
| 176 |
> |
lastpos = ftell(ambfp); |
| 177 |
|
} |
| 165 |
– |
nunflshed++; /* lie */ |
| 166 |
– |
ambsync(); |
| 178 |
|
} |
| 179 |
|
|
| 180 |
|
|
| 181 |
< |
ambnotify(obj) /* record new modifier */ |
| 182 |
< |
OBJECT obj; |
| 181 |
> |
void |
| 182 |
> |
ambdone(void) /* close ambient file and free memory */ |
| 183 |
|
{ |
| 184 |
+ |
if (ambfp != NULL) { /* close ambient file */ |
| 185 |
+ |
fclose(ambfp); /* don't call ambsync() */ |
| 186 |
+ |
ambfp = NULL; |
| 187 |
+ |
lastpos = -1; |
| 188 |
+ |
if (ambinp != NULL) { |
| 189 |
+ |
fclose(ambinp); |
| 190 |
+ |
ambinp = NULL; |
| 191 |
+ |
} |
| 192 |
+ |
} |
| 193 |
+ |
/* free ambient tree */ |
| 194 |
+ |
unloadatree(&atrunk, avfree); |
| 195 |
+ |
/* reset state variables */ |
| 196 |
+ |
avsum = 0.; |
| 197 |
+ |
navsum = 0; |
| 198 |
+ |
nambvals = 0; |
| 199 |
+ |
} |
| 200 |
+ |
|
| 201 |
+ |
|
| 202 |
+ |
void |
| 203 |
+ |
ambnotify( /* record new modifier */ |
| 204 |
+ |
OBJECT obj |
| 205 |
+ |
) |
| 206 |
+ |
{ |
| 207 |
|
static int hitlimit = 0; |
| 208 |
< |
register OBJREC *o = objptr(obj); |
| 209 |
< |
register char **amblp; |
| 208 |
> |
OBJREC *o; |
| 209 |
> |
char **amblp; |
| 210 |
|
|
| 211 |
+ |
if (obj == OVOID) { /* starting over */ |
| 212 |
+ |
ambset[0] = 0; |
| 213 |
+ |
hitlimit = 0; |
| 214 |
+ |
return; |
| 215 |
+ |
} |
| 216 |
+ |
o = objptr(obj); |
| 217 |
|
if (hitlimit || !ismodifier(o->otype)) |
| 218 |
|
return; |
| 219 |
|
for (amblp = amblist; *amblp != NULL; amblp++) |
| 229 |
|
} |
| 230 |
|
|
| 231 |
|
|
| 232 |
< |
ambient(acol, r, nrm) /* compute ambient component for ray */ |
| 233 |
< |
COLOR acol; |
| 234 |
< |
register RAY *r; |
| 235 |
< |
FVECT nrm; |
| 232 |
> |
void |
| 233 |
> |
multambient( /* compute ambient component & multiply by coef. */ |
| 234 |
> |
SCOLOR aval, |
| 235 |
> |
RAY *r, |
| 236 |
> |
FVECT nrm |
| 237 |
> |
) |
| 238 |
|
{ |
| 239 |
+ |
static double logAvgAbsorp = 1; |
| 240 |
|
static int rdepth = 0; /* ambient recursion */ |
| 241 |
+ |
SCOLOR acol, caustic; |
| 242 |
+ |
int i, ok; |
| 243 |
|
double d, l; |
| 244 |
|
|
| 245 |
+ |
/* PMAP: Factor in ambient from photon map, if enabled and ray is |
| 246 |
+ |
* ambient. Return as all ambient components accounted for, else |
| 247 |
+ |
* continue. */ |
| 248 |
+ |
if (ambPmap(aval, r, rdepth)) |
| 249 |
+ |
return; |
| 250 |
+ |
|
| 251 |
+ |
if (logAvgAbsorp > 0) /* exclude in -aw to avoid growth */ |
| 252 |
+ |
logAvgAbsorp = log(1.-AVGREFL); |
| 253 |
+ |
|
| 254 |
+ |
/* PMAP: Factor in specular-diffuse ambient (caustics) from photon |
| 255 |
+ |
* map, if enabled and ray is primary, else caustic is zero. Continue |
| 256 |
+ |
* with RADIANCE ambient calculation */ |
| 257 |
+ |
{/* XXX TEMPORARY */ |
| 258 |
+ |
COLOR pmc; |
| 259 |
+ |
scolor_color(pmc, aval); |
| 260 |
+ |
ambPmapCaustic(pmc, r, rdepth); |
| 261 |
+ |
setscolor(caustic, colval(pmc,RED), colval(pmc,GRN), colval(pmc,BLU)); |
| 262 |
+ |
} |
| 263 |
|
if (ambdiv <= 0) /* no ambient calculation */ |
| 264 |
|
goto dumbamb; |
| 265 |
|
/* check number of bounces */ |
| 270 |
|
ambincl != inset(ambset, r->ro->omod)) |
| 271 |
|
goto dumbamb; |
| 272 |
|
|
| 273 |
< |
if (ambacc <= FTINY) { /* no ambient storage */ |
| 273 |
> |
if (ambacc <= FTINY) { /* no ambient storage? */ |
| 274 |
> |
double rdot = DOT(nrm,r->ron); |
| 275 |
> |
int sgn = 1 - 2*(rdot < 0); |
| 276 |
> |
float dgrad[2], *dgp = NULL; |
| 277 |
> |
FVECT uvd[2]; |
| 278 |
> |
|
| 279 |
> |
if (sgn*rdot < 0.9999) |
| 280 |
> |
dgp = dgrad; /* compute rotational grad. */ |
| 281 |
> |
copyscolor(acol, aval); |
| 282 |
|
rdepth++; |
| 283 |
< |
d = doambient(acol, r, r->rweight, NULL, NULL); |
| 283 |
> |
ok = doambient(acol, r, r->rweight*sgn, |
| 284 |
> |
uvd, NULL, NULL, dgp, NULL); |
| 285 |
|
rdepth--; |
| 286 |
< |
if (d <= FTINY) |
| 286 |
> |
if (!ok) |
| 287 |
|
goto dumbamb; |
| 288 |
+ |
if ((ok > 0) & (dgp != NULL)) { /* apply texture */ |
| 289 |
+ |
FVECT v1; |
| 290 |
+ |
VCROSS(v1, r->ron, nrm); |
| 291 |
+ |
d = 1.0; |
| 292 |
+ |
for (i = 3; i--; ) |
| 293 |
+ |
d += sgn*v1[i] * (dgp[0]*uvd[0][i] + dgp[1]*uvd[1][i]); |
| 294 |
+ |
if (d >= 0.05) |
| 295 |
+ |
scalescolor(acol, d); |
| 296 |
+ |
} |
| 297 |
+ |
copyscolor(aval, acol); |
| 298 |
+ |
|
| 299 |
+ |
/* PMAP: add in caustic */ |
| 300 |
+ |
saddscolor(aval, caustic); |
| 301 |
|
return; |
| 302 |
|
} |
| 303 |
< |
|
| 304 |
< |
if (tracktime) /* sort to minimize thrashing */ |
| 220 |
< |
sortambvals(0); |
| 221 |
< |
/* get ambient value */ |
| 222 |
< |
setcolor(acol, 0.0, 0.0, 0.0); |
| 303 |
> |
/* interpolate ambient value */ |
| 304 |
> |
scolorblack(acol); |
| 305 |
|
d = sumambient(acol, r, nrm, rdepth, |
| 306 |
|
&atrunk, thescene.cuorg, thescene.cusize); |
| 307 |
+ |
|
| 308 |
|
if (d > FTINY) { |
| 309 |
< |
scalecolor(acol, 1.0/d); |
| 309 |
> |
scalescolor(acol, 1.0/d); |
| 310 |
> |
smultscolor(aval, acol); |
| 311 |
> |
|
| 312 |
> |
/* PMAP: add in caustic */ |
| 313 |
> |
saddscolor(aval, caustic); |
| 314 |
|
return; |
| 315 |
|
} |
| 316 |
+ |
|
| 317 |
|
rdepth++; /* need to cache new value */ |
| 318 |
< |
d = makeambient(acol, r, nrm, rdepth-1); |
| 318 |
> |
ok = makeambient(acol, r, nrm, rdepth-1); |
| 319 |
|
rdepth--; |
| 320 |
< |
if (d > FTINY) |
| 320 |
> |
|
| 321 |
> |
if (ok) { |
| 322 |
> |
smultscolor(aval, acol); /* computed new value */ |
| 323 |
> |
|
| 324 |
> |
/* PMAP: add in caustic */ |
| 325 |
> |
saddscolor(aval, caustic); |
| 326 |
|
return; |
| 327 |
+ |
} |
| 328 |
+ |
|
| 329 |
|
dumbamb: /* return global value */ |
| 330 |
< |
copycolor(acol, ambval); |
| 331 |
< |
if (ambvwt <= 0 | navsum == 0) |
| 330 |
> |
if ((ambvwt <= 0) | (navsum == 0)) { |
| 331 |
> |
smultcolor(aval, ambval); |
| 332 |
> |
|
| 333 |
> |
/* PMAP: add in caustic */ |
| 334 |
> |
saddscolor(aval, caustic); |
| 335 |
|
return; |
| 336 |
< |
l = bright(ambval); /* average in computations */ |
| 336 |
> |
} |
| 337 |
> |
|
| 338 |
> |
l = bright(ambval); /* average in computations */ |
| 339 |
|
if (l > FTINY) { |
| 340 |
< |
d = (log(l)*(double)ambvwt + avsum) / |
| 340 |
> |
d = (log(l)*(double)ambvwt + avsum + logAvgAbsorp*navsum) / |
| 341 |
|
(double)(ambvwt + navsum); |
| 342 |
|
d = exp(d) / l; |
| 343 |
< |
scalecolor(acol, d); /* apply color of ambval */ |
| 343 |
> |
scalescolor(aval, d); |
| 344 |
> |
smultcolor(aval, ambval); /* apply color of ambval */ |
| 345 |
|
} else { |
| 346 |
< |
d = exp( avsum / (double)navsum ); |
| 347 |
< |
setcolor(acol, d, d, d); /* neutral color */ |
| 346 |
> |
d = exp( avsum/(double)navsum + logAvgAbsorp ); |
| 347 |
> |
scalescolor(aval, d); /* neutral color */ |
| 348 |
|
} |
| 349 |
|
} |
| 350 |
|
|
| 351 |
|
|
| 352 |
< |
double |
| 353 |
< |
sumambient(acol, r, rn, al, at, c0, s) /* get interpolated ambient value */ |
| 354 |
< |
COLOR acol; |
| 254 |
< |
register RAY *r; |
| 255 |
< |
FVECT rn; |
| 256 |
< |
int al; |
| 257 |
< |
AMBTREE *at; |
| 258 |
< |
FVECT c0; |
| 259 |
< |
double s; |
| 352 |
> |
/* Plug a potential leak where ambient cache value is occluded */ |
| 353 |
> |
static int |
| 354 |
> |
plugaleak(RAY *r, AMBVAL *ap, FVECT anorm, double ang) |
| 355 |
|
{ |
| 356 |
< |
double d, e1, e2, wt, wsum; |
| 357 |
< |
COLOR ct; |
| 358 |
< |
FVECT ck0; |
| 359 |
< |
int i; |
| 360 |
< |
register int j; |
| 266 |
< |
register AMBVAL *av; |
| 356 |
> |
const double cost70sq = 0.1169778; /* cos(70deg)^2 */ |
| 357 |
> |
RAY rtst; |
| 358 |
> |
FVECT vdif; |
| 359 |
> |
double normdot, ndotd, nadotd; |
| 360 |
> |
double a, b, c, t[2]; |
| 361 |
|
|
| 362 |
< |
wsum = 0.0; |
| 363 |
< |
/* do this node */ |
| 362 |
> |
ang += 2.*PI*(ang < 0); /* check direction flags */ |
| 363 |
> |
if ( !(ap->corral>>(int)(ang*(16./PI)) & 1) ) |
| 364 |
> |
return(0); |
| 365 |
> |
/* |
| 366 |
> |
* Generate test ray, targeting 20 degrees above sample point plane |
| 367 |
> |
* along surface normal from cache position. This should be high |
| 368 |
> |
* enough to miss local geometry we don't really care about. |
| 369 |
> |
*/ |
| 370 |
> |
VSUB(vdif, ap->pos, r->rop); |
| 371 |
> |
normdot = DOT(anorm, r->ron); |
| 372 |
> |
ndotd = DOT(vdif, r->ron); |
| 373 |
> |
nadotd = DOT(vdif, anorm); |
| 374 |
> |
a = normdot*normdot - cost70sq; |
| 375 |
> |
b = 2.0*(normdot*ndotd - nadotd*cost70sq); |
| 376 |
> |
c = ndotd*ndotd - DOT(vdif,vdif)*cost70sq; |
| 377 |
> |
if (quadratic(t, a, b, c) != 2) |
| 378 |
> |
return(1); /* should rarely happen */ |
| 379 |
> |
if (t[1] <= FTINY) |
| 380 |
> |
return(0); /* should fail behind test */ |
| 381 |
> |
rayorigin(&rtst, SHADOW, r, NULL); |
| 382 |
> |
VSUM(rtst.rdir, vdif, anorm, t[1]); /* further dist. > plane */ |
| 383 |
> |
rtst.rmax = normalize(rtst.rdir); /* short ray test */ |
| 384 |
> |
while (localhit(&rtst, &thescene)) { /* check for occluder */ |
| 385 |
> |
OBJREC *m = findmaterial(rtst.ro); |
| 386 |
> |
if (m != NULL && !istransp(m) && !isBSDFproxy(m) && |
| 387 |
> |
(rtst.clipset == NULL || |
| 388 |
> |
!inset(rtst.clipset, rtst.ro->omod))) |
| 389 |
> |
return(1); /* plug light leak */ |
| 390 |
> |
VCOPY(rtst.rorg, rtst.rop); /* skip invisible surface */ |
| 391 |
> |
rtst.rmax -= rtst.rot; |
| 392 |
> |
rayclear(&rtst); |
| 393 |
> |
} |
| 394 |
> |
return(0); /* seems we're OK */ |
| 395 |
> |
} |
| 396 |
> |
|
| 397 |
> |
|
| 398 |
> |
static double |
| 399 |
> |
sumambient( /* get interpolated ambient value */ |
| 400 |
> |
SCOLOR acol, |
| 401 |
> |
RAY *r, |
| 402 |
> |
FVECT rn, |
| 403 |
> |
int al, |
| 404 |
> |
AMBTREE *at, |
| 405 |
> |
FVECT c0, |
| 406 |
> |
double s |
| 407 |
> |
) |
| 408 |
> |
{ /* initial limit is 10 degrees plus ambacc radians */ |
| 409 |
> |
const double minangle = 10.0 * PI/180.; |
| 410 |
> |
const int sgn = 1 - 2*(DOT(r->ron,rn) < 0); |
| 411 |
> |
double maxangle = minangle + ambacc; |
| 412 |
> |
double wsum = 0.0; |
| 413 |
> |
FVECT ck0; |
| 414 |
> |
int i, j; |
| 415 |
> |
AMBVAL *av; |
| 416 |
> |
|
| 417 |
> |
if (at->kid != NULL) { /* sum children first */ |
| 418 |
> |
s *= 0.5; |
| 419 |
> |
for (i = 0; i < 8; i++) { |
| 420 |
> |
for (j = 0; j < 3; j++) { |
| 421 |
> |
ck0[j] = c0[j]; |
| 422 |
> |
if (1<<j & i) |
| 423 |
> |
ck0[j] += s; |
| 424 |
> |
if (r->rop[j] < ck0[j] - OCTSCALE*s) |
| 425 |
> |
break; |
| 426 |
> |
if (r->rop[j] > ck0[j] + (1.0+OCTSCALE)*s) |
| 427 |
> |
break; |
| 428 |
> |
} |
| 429 |
> |
if (j == 3) |
| 430 |
> |
wsum += sumambient(acol, r, rn, al, |
| 431 |
> |
at->kid+i, ck0, s); |
| 432 |
> |
} |
| 433 |
> |
/* good enough? */ |
| 434 |
> |
if ((wsum >= 0.05) & (s*ambacc > minarad)) |
| 435 |
> |
return(wsum); |
| 436 |
> |
} |
| 437 |
> |
/* adjust maximum angle */ |
| 438 |
> |
if (at->alist != NULL && (at->alist->lvl <= al) & (r->rweight < 0.6)) |
| 439 |
> |
maxangle = (maxangle - PI/2.)*pow(r->rweight,0.13) + PI/2.; |
| 440 |
> |
/* sum this node */ |
| 441 |
|
for (av = at->alist; av != NULL; av = av->next) { |
| 442 |
< |
if (tracktime) |
| 443 |
< |
av->latick = ambclock; |
| 442 |
> |
double u, v, d, delta_r2, delta_t2; |
| 443 |
> |
SCOLOR sct; |
| 444 |
> |
FVECT uvw[3]; |
| 445 |
|
/* |
| 446 |
< |
* Ambient level test. |
| 446 |
> |
* Ambient level test |
| 447 |
|
*/ |
| 448 |
< |
if (av->lvl > al) /* list sorted, so this works */ |
| 448 |
> |
if (av->lvl > al || /* list sorted, so this works */ |
| 449 |
> |
(av->lvl == al) & (av->weight < 0.9*r->rweight)) |
| 450 |
|
break; |
| 451 |
< |
if (av->weight < r->rweight-FTINY) |
| 451 |
> |
/* |
| 452 |
> |
* Direction test using unperturbed normal |
| 453 |
> |
*/ |
| 454 |
> |
decodedir(uvw[2], av->ndir); |
| 455 |
> |
d = sgn * DOT(uvw[2], r->ron); |
| 456 |
> |
if (d <= 0.0) /* >= 90 degrees */ |
| 457 |
|
continue; |
| 458 |
+ |
delta_r2 = 2.0 - 2.0*d; /* approx. radians^2 */ |
| 459 |
+ |
if (delta_r2 >= maxangle*maxangle) |
| 460 |
+ |
continue; |
| 461 |
|
/* |
| 462 |
< |
* Ambient radius test. |
| 462 |
> |
* Modified ray behind test |
| 463 |
|
*/ |
| 464 |
< |
d = av->pos[0] - r->rop[0]; |
| 465 |
< |
e1 = d * d; |
| 466 |
< |
d = av->pos[1] - r->rop[1]; |
| 286 |
< |
e1 += d * d; |
| 287 |
< |
d = av->pos[2] - r->rop[2]; |
| 288 |
< |
e1 += d * d; |
| 289 |
< |
e1 /= av->rad * av->rad; |
| 290 |
< |
if (e1 > ambacc*ambacc*1.21) |
| 464 |
> |
VSUB(ck0, r->rop, av->pos); |
| 465 |
> |
d = DOT(ck0, uvw[2]); |
| 466 |
> |
if (d < -minarad*ambacc) |
| 467 |
|
continue; |
| 468 |
+ |
d /= av->rad[0]; |
| 469 |
+ |
delta_t2 = d*d; |
| 470 |
+ |
if (delta_t2 >= ambacc*ambacc) |
| 471 |
+ |
continue; |
| 472 |
|
/* |
| 473 |
< |
* Normal direction test. |
| 473 |
> |
* Elliptical radii test based on Hessian |
| 474 |
|
*/ |
| 475 |
< |
e2 = (1.0 - DOT(av->dir, r->ron)) * r->rweight; |
| 476 |
< |
if (e2 < 0.0) e2 = 0.0; |
| 477 |
< |
if (e1 + e2 > ambacc*ambacc*1.21) |
| 475 |
> |
decodedir(uvw[0], av->udir); |
| 476 |
> |
VCROSS(uvw[1], uvw[2], uvw[0]); |
| 477 |
> |
d = (u = DOT(ck0, uvw[0])) / av->rad[0]; |
| 478 |
> |
delta_t2 += d*d; |
| 479 |
> |
d = (v = DOT(ck0, uvw[1])) / av->rad[1]; |
| 480 |
> |
delta_t2 += d*d; |
| 481 |
> |
if (delta_t2 >= ambacc*ambacc) |
| 482 |
|
continue; |
| 483 |
|
/* |
| 484 |
< |
* Ray behind test. |
| 484 |
> |
* Test for potential light leak |
| 485 |
|
*/ |
| 486 |
< |
d = 0.0; |
| 303 |
< |
for (j = 0; j < 3; j++) |
| 304 |
< |
d += (r->rop[j] - av->pos[j]) * |
| 305 |
< |
(av->dir[j] + r->ron[j]); |
| 306 |
< |
if (d*0.5 < -minarad*ambacc-.001) |
| 486 |
> |
if (av->corral && plugaleak(r, av, uvw[2], atan2a(v,u))) |
| 487 |
|
continue; |
| 488 |
|
/* |
| 489 |
< |
* Jittering final test reduces image artifacts. |
| 489 |
> |
* Extrapolate value and compute final weight (hat function) |
| 490 |
|
*/ |
| 491 |
< |
wt = sqrt(e1) + sqrt(e2); |
| 312 |
< |
if (wt > ambacc*(.9+.2*urand(9015+samplendx))) |
| 491 |
> |
if (!extambient(sct, av, r->rop, rn, uvw)) |
| 492 |
|
continue; |
| 493 |
< |
if (wt <= 1e-3) |
| 494 |
< |
wt = 1e3; |
| 495 |
< |
else |
| 496 |
< |
wt = 1.0 / wt; |
| 497 |
< |
wsum += wt; |
| 319 |
< |
extambient(ct, av, r->rop, rn); |
| 320 |
< |
scalecolor(ct, wt); |
| 321 |
< |
addcolor(acol, ct); |
| 493 |
> |
d = tfunc(maxangle, sqrt(delta_r2), 0.0) * |
| 494 |
> |
tfunc(ambacc, sqrt(delta_t2), 0.0); |
| 495 |
> |
scalescolor(sct, d); |
| 496 |
> |
saddscolor(acol, sct); |
| 497 |
> |
wsum += d; |
| 498 |
|
} |
| 323 |
– |
if (at->kid == NULL) |
| 324 |
– |
return(wsum); |
| 325 |
– |
/* do children */ |
| 326 |
– |
s *= 0.5; |
| 327 |
– |
for (i = 0; i < 8; i++) { |
| 328 |
– |
for (j = 0; j < 3; j++) { |
| 329 |
– |
ck0[j] = c0[j]; |
| 330 |
– |
if (1<<j & i) |
| 331 |
– |
ck0[j] += s; |
| 332 |
– |
if (r->rop[j] < ck0[j] - OCTSCALE*s) |
| 333 |
– |
break; |
| 334 |
– |
if (r->rop[j] > ck0[j] + (1.0+OCTSCALE)*s) |
| 335 |
– |
break; |
| 336 |
– |
} |
| 337 |
– |
if (j == 3) |
| 338 |
– |
wsum += sumambient(acol, r, rn, al, at->kid+i, ck0, s); |
| 339 |
– |
} |
| 499 |
|
return(wsum); |
| 500 |
|
} |
| 501 |
|
|
| 502 |
|
|
| 503 |
< |
double |
| 504 |
< |
makeambient(acol, r, rn, al) /* make a new ambient value */ |
| 505 |
< |
COLOR acol; |
| 506 |
< |
register RAY *r; |
| 507 |
< |
FVECT rn; |
| 508 |
< |
int al; |
| 503 |
> |
static int |
| 504 |
> |
makeambient( /* make a new ambient value for storage */ |
| 505 |
> |
SCOLOR acol, |
| 506 |
> |
RAY *r, |
| 507 |
> |
FVECT rn, |
| 508 |
> |
int al |
| 509 |
> |
) |
| 510 |
|
{ |
| 511 |
+ |
int sgn = 1 - 2*(DOT(r->ron,rn) < 0); |
| 512 |
|
AMBVAL amb; |
| 513 |
< |
FVECT gp, gd; |
| 514 |
< |
/* compute weight */ |
| 515 |
< |
amb.weight = pow(AVGREFL, (double)al); |
| 516 |
< |
if (r->rweight < 0.1*amb.weight) /* heuristic */ |
| 517 |
< |
amb.weight = r->rweight; |
| 513 |
> |
FVECT uvw[3]; |
| 514 |
> |
int i; |
| 515 |
> |
|
| 516 |
> |
amb.weight = 1.0; /* compute weight */ |
| 517 |
> |
for (i = al; i-- > 0; ) |
| 518 |
> |
amb.weight *= AVGREFL; |
| 519 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic override */ |
| 520 |
> |
amb.weight = 1.25*r->rweight; |
| 521 |
> |
setscolor(acol, AVGREFL, AVGREFL, AVGREFL); |
| 522 |
|
/* compute ambient */ |
| 523 |
< |
amb.rad = doambient(acol, r, amb.weight, gp, gd); |
| 524 |
< |
if (amb.rad <= FTINY) |
| 525 |
< |
return(0.0); |
| 526 |
< |
/* store it */ |
| 523 |
> |
i = doambient(acol, r, amb.weight*sgn, |
| 524 |
> |
uvw, amb.rad, amb.gpos, amb.gdir, &amb.corral); |
| 525 |
> |
scalescolor(acol, 1./AVGREFL); /* undo assumed reflectance */ |
| 526 |
> |
if (i <= 0 || amb.rad[0] <= FTINY) /* no Hessian or zero radius */ |
| 527 |
> |
return(i); |
| 528 |
> |
uvw[2][0] = sgn*r->ron[0]; /* orient unperturbed normal */ |
| 529 |
> |
uvw[2][1] = sgn*r->ron[1]; |
| 530 |
> |
uvw[2][2] = sgn*r->ron[2]; |
| 531 |
> |
/* store value */ |
| 532 |
|
VCOPY(amb.pos, r->rop); |
| 533 |
< |
VCOPY(amb.dir, r->ron); |
| 533 |
> |
amb.ndir = encodedir(uvw[2]); |
| 534 |
> |
amb.udir = encodedir(uvw[0]); |
| 535 |
|
amb.lvl = al; |
| 536 |
< |
copycolor(amb.val, acol); |
| 537 |
< |
VCOPY(amb.gpos, gp); |
| 538 |
< |
VCOPY(amb.gdir, gd); |
| 539 |
< |
/* insert into tree */ |
| 540 |
< |
avsave(&amb); /* and save to file */ |
| 370 |
< |
if (rn != r->ron) |
| 371 |
< |
extambient(acol, &amb, r->rop, rn); /* texture */ |
| 372 |
< |
return(amb.rad); |
| 536 |
> |
copyscolor(amb.val, acol); |
| 537 |
> |
avsave(&amb); /* insert and save to file */ |
| 538 |
> |
if (DOT(uvw[2],rn) < 0.9999) /* texture? */ |
| 539 |
> |
extambient(acol, &amb, r->rop, rn, uvw); |
| 540 |
> |
return(1); |
| 541 |
|
} |
| 542 |
|
|
| 543 |
|
|
| 544 |
< |
extambient(cr, ap, pv, nv) /* extrapolate value at pv, nv */ |
| 545 |
< |
COLOR cr; |
| 546 |
< |
register AMBVAL *ap; |
| 547 |
< |
FVECT pv, nv; |
| 544 |
> |
static int |
| 545 |
> |
extambient( /* extrapolate value at pv, nv */ |
| 546 |
> |
SCOLOR scr, |
| 547 |
> |
AMBVAL *ap, |
| 548 |
> |
FVECT pv, |
| 549 |
> |
FVECT nv, |
| 550 |
> |
FVECT uvw[3] |
| 551 |
> |
) |
| 552 |
|
{ |
| 553 |
< |
FVECT v1, v2; |
| 554 |
< |
register int i; |
| 555 |
< |
double d; |
| 553 |
> |
const double min_d = 0.05; |
| 554 |
> |
const double max_d = 20.; |
| 555 |
> |
static FVECT my_uvw[3]; |
| 556 |
> |
FVECT v1; |
| 557 |
> |
int i; |
| 558 |
> |
double d = 1.0; /* zeroeth order */ |
| 559 |
|
|
| 560 |
< |
d = 1.0; /* zeroeth order */ |
| 561 |
< |
/* gradient due to translation */ |
| 562 |
< |
for (i = 0; i < 3; i++) |
| 563 |
< |
d += ap->gpos[i]*(pv[i]-ap->pos[i]); |
| 564 |
< |
/* gradient due to rotation */ |
| 390 |
< |
VCOPY(v1, ap->dir); |
| 391 |
< |
fcross(v2, v1, nv); |
| 392 |
< |
d += DOT(ap->gdir, v2); |
| 393 |
< |
if (d <= 0.0) { |
| 394 |
< |
setcolor(cr, 0.0, 0.0, 0.0); |
| 395 |
< |
return; |
| 560 |
> |
if (uvw == NULL) { /* need local coordinates? */ |
| 561 |
> |
decodedir(my_uvw[2], ap->ndir); |
| 562 |
> |
decodedir(my_uvw[0], ap->udir); |
| 563 |
> |
VCROSS(my_uvw[1], my_uvw[2], my_uvw[0]); |
| 564 |
> |
uvw = my_uvw; |
| 565 |
|
} |
| 566 |
< |
copycolor(cr, ap->val); |
| 567 |
< |
scalecolor(cr, d); |
| 566 |
> |
for (i = 3; i--; ) /* gradient due to translation */ |
| 567 |
> |
d += (pv[i] - ap->pos[i]) * |
| 568 |
> |
(ap->gpos[0]*uvw[0][i] + ap->gpos[1]*uvw[1][i]); |
| 569 |
> |
|
| 570 |
> |
VCROSS(v1, uvw[2], nv); /* gradient due to rotation */ |
| 571 |
> |
for (i = 3; i--; ) |
| 572 |
> |
d += v1[i] * (ap->gdir[0]*uvw[0][i] + ap->gdir[1]*uvw[1][i]); |
| 573 |
> |
|
| 574 |
> |
if (d < min_d) /* clamp min/max scaling */ |
| 575 |
> |
d = min_d; |
| 576 |
> |
else if (d > max_d) |
| 577 |
> |
d = max_d; |
| 578 |
> |
copyscolor(scr, ap->val); |
| 579 |
> |
scalescolor(scr, d); |
| 580 |
> |
return(d > min_d); |
| 581 |
|
} |
| 582 |
|
|
| 583 |
|
|
| 584 |
< |
static |
| 585 |
< |
initambfile(creat) /* initialize ambient file */ |
| 586 |
< |
int creat; |
| 584 |
> |
static void |
| 585 |
> |
avinsert( /* insert ambient value in our tree */ |
| 586 |
> |
AMBVAL *av |
| 587 |
> |
) |
| 588 |
|
{ |
| 589 |
< |
extern char *progname, *octname, VersionID[]; |
| 589 |
> |
AMBTREE *at; |
| 590 |
> |
AMBVAL *ap; |
| 591 |
> |
AMBVAL avh; |
| 592 |
> |
FVECT ck0; |
| 593 |
> |
double s; |
| 594 |
> |
int branch; |
| 595 |
> |
int i; |
| 596 |
|
|
| 597 |
< |
#ifdef F_SETLKW |
| 598 |
< |
aflock(creat ? F_WRLCK : F_RDLCK); |
| 599 |
< |
#endif |
| 600 |
< |
#ifdef MSDOS |
| 601 |
< |
setmode(fileno(ambfp), O_BINARY); |
| 602 |
< |
#endif |
| 603 |
< |
setbuf(ambfp, bmalloc(BUFSIZ+8)); |
| 604 |
< |
if (creat) { /* new file */ |
| 597 |
> |
if (av->rad[0] <= FTINY) |
| 598 |
> |
error(CONSISTENCY, "zero ambient radius in avinsert"); |
| 599 |
> |
at = &atrunk; |
| 600 |
> |
VCOPY(ck0, thescene.cuorg); |
| 601 |
> |
s = thescene.cusize; |
| 602 |
> |
while (s*(OCTSCALE/2) > av->rad[1]*ambacc) { |
| 603 |
> |
if (at->kid == NULL) |
| 604 |
> |
if ((at->kid = newambtree()) == NULL) |
| 605 |
> |
error(SYSTEM, "out of memory in avinsert"); |
| 606 |
> |
s *= 0.5; |
| 607 |
> |
branch = 0; |
| 608 |
> |
for (i = 0; i < 3; i++) |
| 609 |
> |
if (av->pos[i] > ck0[i] + s) { |
| 610 |
> |
ck0[i] += s; |
| 611 |
> |
branch |= 1 << i; |
| 612 |
> |
} |
| 613 |
> |
at = at->kid + branch; |
| 614 |
> |
} |
| 615 |
> |
avh.next = at->alist; /* order by increasing level */ |
| 616 |
> |
for (ap = &avh; ap->next != NULL; ap = ap->next) |
| 617 |
> |
if ( ap->next->lvl > av->lvl || |
| 618 |
> |
(ap->next->lvl == av->lvl) & |
| 619 |
> |
(ap->next->weight <= av->weight) ) |
| 620 |
> |
break; |
| 621 |
> |
av->next = ap->next; |
| 622 |
> |
ap->next = (AMBVAL*)av; |
| 623 |
> |
at->alist = avh.next; |
| 624 |
> |
} |
| 625 |
> |
|
| 626 |
> |
|
| 627 |
> |
static void |
| 628 |
> |
initambfile( /* initialize ambient file */ |
| 629 |
> |
int cre8 |
| 630 |
> |
) |
| 631 |
> |
{ |
| 632 |
> |
extern char *progname, *octname; |
| 633 |
> |
static char *mybuf = NULL; |
| 634 |
> |
int ntries = 3; |
| 635 |
> |
|
| 636 |
> |
if (!AMBFLUSH) |
| 637 |
> |
error(INTERNAL, "BUFSIZ too small in initambfile"); |
| 638 |
> |
SET_FILE_BINARY(ambfp); |
| 639 |
> |
if (mybuf == NULL) |
| 640 |
> |
mybuf = (char *)bmalloc(BUFSIZ); |
| 641 |
> |
setbuf(ambfp, mybuf); |
| 642 |
> |
nunflshed = 0; |
| 643 |
> |
retry: |
| 644 |
> |
if (cre8) { /* new file */ |
| 645 |
|
newheader("RADIANCE", ambfp); |
| 646 |
|
fprintf(ambfp, "%s -av %g %g %g -aw %d -ab %d -aa %g ", |
| 647 |
|
progname, colval(ambval,RED), |
| 648 |
|
colval(ambval,GRN), colval(ambval,BLU), |
| 649 |
|
ambvwt, ambounce, ambacc); |
| 650 |
< |
fprintf(ambfp, "-ad %d -as %d -ar %d %s\n", |
| 651 |
< |
ambdiv, ambssamp, ambres, |
| 652 |
< |
octname==NULL ? "" : octname); |
| 650 |
> |
fprintf(ambfp, "-ad %d -as %d -ar %d ", |
| 651 |
> |
ambdiv, ambssamp, ambres); |
| 652 |
> |
fprintf(ambfp, "-dr %d -ds %g -dt %g -dc %g ", directrelay, |
| 653 |
> |
srcsizerat, shadthresh, shadcert); |
| 654 |
> |
fprintf(ambfp, "-ss %g -st %g -lr %d -lw %g ", specjitter, |
| 655 |
> |
specthresh, maxdepth, minweight); |
| 656 |
> |
fprintf(ambfp, "-cw %g %g -cs %d ", WLPART[3], WLPART[0], NCSAMP); |
| 657 |
> |
if (octname != NULL) |
| 658 |
> |
fputs(octname, ambfp); |
| 659 |
> |
fputc('\n', ambfp); /* end of command line, not header! */ |
| 660 |
|
fprintf(ambfp, "SOFTWARE= %s\n", VersionID); |
| 661 |
+ |
fputnow(ambfp); |
| 662 |
+ |
AMB_CNDX = CNDX; /* use current spectral sampling */ |
| 663 |
+ |
AMB_WLPART = WLPART; |
| 664 |
+ |
fputwlsplit(WLPART, ambfp); |
| 665 |
+ |
fputncomp(NCSAMP, ambfp); |
| 666 |
|
fputformat(AMBFMT, ambfp); |
| 667 |
< |
putc('\n', ambfp); |
| 667 |
> |
fputc('\n', ambfp); |
| 668 |
|
putambmagic(ambfp); |
| 669 |
< |
} else if (checkheader(ambfp, AMBFMT, NULL) < 0 || !hasambmagic(ambfp)) |
| 670 |
< |
error(USER, "bad ambient file"); |
| 669 |
> |
} else if (getheader(ambfp, amb_headline, NULL) < 0 || !hasambmagic(ambfp)) { |
| 670 |
> |
if (--ntries > 0 && ftell(ambfp) == 0) { |
| 671 |
> |
clearerr(ambfp); |
| 672 |
> |
sleep(2); |
| 673 |
> |
goto retry; |
| 674 |
> |
} |
| 675 |
> |
error(USER, "bad/incompatible ambient file"); |
| 676 |
> |
} |
| 677 |
> |
if ((AMB_CNDX != CNDX) | (AMB_WLPART != WLPART)) { |
| 678 |
> |
if (setspectrsamp(AMB_CNDX, AMB_WLPART) < 0) |
| 679 |
> |
error(USER, "bad wavelength sampling in ambient file"); |
| 680 |
> |
if (AMB_CNDX[3] == CNDX[3] && FABSEQ(AMB_WLPART[0],WLPART[0]) && |
| 681 |
> |
FABSEQ(AMB_WLPART[3],WLPART[3])) { |
| 682 |
> |
AMB_CNDX = CNDX; |
| 683 |
> |
AMB_WLPART = WLPART; /* just the same */ |
| 684 |
> |
} else |
| 685 |
> |
error(WARNING, "different ambient file wavelength sampling"); |
| 686 |
> |
} |
| 687 |
|
} |
| 688 |
|
|
| 689 |
|
|
| 690 |
< |
static |
| 691 |
< |
avsave(av) /* insert and save an ambient value */ |
| 692 |
< |
AMBVAL *av; |
| 690 |
> |
static void |
| 691 |
> |
avsave( /* insert and save an ambient value */ |
| 692 |
> |
AMBVAL *av |
| 693 |
> |
) |
| 694 |
|
{ |
| 695 |
< |
avinsert(avstore(av)); |
| 695 |
> |
avstore(av); |
| 696 |
|
if (ambfp == NULL) |
| 697 |
|
return; |
| 698 |
|
if (writambval(av, ambfp) < 0) |
| 702 |
|
goto writerr; |
| 703 |
|
return; |
| 704 |
|
writerr: |
| 705 |
< |
error(SYSTEM, "error writing ambient file"); |
| 705 |
> |
error(SYSTEM, "error writing to ambient file"); |
| 706 |
|
} |
| 707 |
|
|
| 708 |
|
|
| 709 |
|
static AMBVAL * |
| 710 |
< |
avstore(aval) /* allocate memory and store aval */ |
| 711 |
< |
register AMBVAL *aval; |
| 710 |
> |
avstore( /* allocate memory and save aval */ |
| 711 |
> |
AMBVAL *aval |
| 712 |
> |
) |
| 713 |
|
{ |
| 714 |
< |
register AMBVAL *av; |
| 714 |
> |
AMBVAL *av; |
| 715 |
|
double d; |
| 716 |
|
|
| 717 |
|
if ((av = newambval()) == NULL) |
| 718 |
|
error(SYSTEM, "out of memory in avstore"); |
| 719 |
< |
copystruct(av, aval); |
| 461 |
< |
av->latick = ambclock; |
| 719 |
> |
memcpy(av, aval, AVSIZE); /* AVSIZE <= sizeof(AMBVAL) */ |
| 720 |
|
av->next = NULL; |
| 721 |
|
nambvals++; |
| 722 |
< |
d = bright(av->val); |
| 722 |
> |
d = pbright(av->val); |
| 723 |
|
if (d > FTINY) { /* add to log sum for averaging */ |
| 724 |
|
avsum += log(d); |
| 725 |
|
navsum++; |
| 726 |
|
} |
| 727 |
+ |
avinsert(av); /* insert in our cache tree */ |
| 728 |
|
return(av); |
| 729 |
|
} |
| 730 |
|
|
| 734 |
|
static AMBTREE *atfreelist = NULL; /* free ambient tree structures */ |
| 735 |
|
|
| 736 |
|
|
| 737 |
< |
static |
| 738 |
< |
AMBTREE * |
| 480 |
< |
newambtree() /* allocate 8 ambient tree structs */ |
| 737 |
> |
static AMBTREE * |
| 738 |
> |
newambtree(void) /* allocate 8 ambient tree structs */ |
| 739 |
|
{ |
| 740 |
< |
register AMBTREE *atp, *upperlim; |
| 740 |
> |
AMBTREE *atp, *upperlim; |
| 741 |
|
|
| 742 |
|
if (atfreelist == NULL) { /* get more nodes */ |
| 743 |
< |
atfreelist = (AMBTREE *)bmalloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
| 743 |
> |
atfreelist = (AMBTREE *)malloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
| 744 |
|
if (atfreelist == NULL) |
| 745 |
|
return(NULL); |
| 746 |
|
/* link new free list */ |
| 751 |
|
} |
| 752 |
|
atp = atfreelist; |
| 753 |
|
atfreelist = atp->kid; |
| 754 |
< |
bzero((char *)atp, 8*sizeof(AMBTREE)); |
| 754 |
> |
memset(atp, 0, 8*sizeof(AMBTREE)); |
| 755 |
|
return(atp); |
| 756 |
|
} |
| 757 |
|
|
| 758 |
|
|
| 759 |
< |
static |
| 760 |
< |
freeambtree(atp) /* free 8 ambient tree structs */ |
| 761 |
< |
AMBTREE *atp; |
| 759 |
> |
static void |
| 760 |
> |
freeambtree( /* free 8 ambient tree structs */ |
| 761 |
> |
AMBTREE *atp |
| 762 |
> |
) |
| 763 |
|
{ |
| 764 |
|
atp->kid = atfreelist; |
| 765 |
|
atfreelist = atp; |
| 766 |
|
} |
| 767 |
|
|
| 768 |
|
|
| 769 |
< |
static |
| 770 |
< |
avinsert(av) /* insert ambient value in our tree */ |
| 771 |
< |
register AMBVAL *av; |
| 769 |
> |
static void |
| 770 |
> |
unloadatree( /* unload an ambient value tree */ |
| 771 |
> |
AMBTREE *at, |
| 772 |
> |
unloadtf_t *f |
| 773 |
> |
) |
| 774 |
|
{ |
| 775 |
< |
register AMBTREE *at; |
| 776 |
< |
register AMBVAL *ap; |
| 516 |
< |
AMBVAL avh; |
| 517 |
< |
FVECT ck0; |
| 518 |
< |
double s; |
| 519 |
< |
int branch; |
| 520 |
< |
register int i; |
| 521 |
< |
|
| 522 |
< |
if (av->rad <= FTINY) |
| 523 |
< |
error(CONSISTENCY, "zero ambient radius in avinsert"); |
| 524 |
< |
at = &atrunk; |
| 525 |
< |
VCOPY(ck0, thescene.cuorg); |
| 526 |
< |
s = thescene.cusize; |
| 527 |
< |
while (s*(OCTSCALE/2) > av->rad*ambacc) { |
| 528 |
< |
if (at->kid == NULL) |
| 529 |
< |
if ((at->kid = newambtree()) == NULL) |
| 530 |
< |
error(SYSTEM, "out of memory in avinsert"); |
| 531 |
< |
s *= 0.5; |
| 532 |
< |
branch = 0; |
| 533 |
< |
for (i = 0; i < 3; i++) |
| 534 |
< |
if (av->pos[i] > ck0[i] + s) { |
| 535 |
< |
ck0[i] += s; |
| 536 |
< |
branch |= 1 << i; |
| 537 |
< |
} |
| 538 |
< |
at = at->kid + branch; |
| 539 |
< |
} |
| 540 |
< |
avh.next = at->alist; /* order by increasing level */ |
| 541 |
< |
for (ap = &avh; ap->next != NULL; ap = ap->next) |
| 542 |
< |
if (ap->next->lvl >= av->lvl) |
| 543 |
< |
break; |
| 544 |
< |
av->next = ap->next; |
| 545 |
< |
ap->next = av; |
| 546 |
< |
at->alist = avh.next; |
| 547 |
< |
} |
| 548 |
< |
|
| 549 |
< |
|
| 550 |
< |
static |
| 551 |
< |
unloadatree(at, f) /* unload an ambient value tree */ |
| 552 |
< |
register AMBTREE *at; |
| 553 |
< |
int (*f)(); |
| 554 |
< |
{ |
| 555 |
< |
register AMBVAL *av; |
| 556 |
< |
register int i; |
| 775 |
> |
AMBVAL *av; |
| 776 |
> |
int i; |
| 777 |
|
/* transfer values at this node */ |
| 778 |
|
for (av = at->alist; av != NULL; av = at->alist) { |
| 779 |
|
at->alist = av->next; |
| 780 |
+ |
av->next = NULL; |
| 781 |
|
(*f)(av); |
| 782 |
|
} |
| 783 |
|
if (at->kid == NULL) |
| 789 |
|
} |
| 790 |
|
|
| 791 |
|
|
| 792 |
< |
static struct avl { |
| 793 |
< |
AMBVAL *p; |
| 573 |
< |
unsigned long t; |
| 574 |
< |
} *avlist1; /* ambient value list with ticks */ |
| 575 |
< |
static AMBVAL **avlist2; /* memory positions for sorting */ |
| 576 |
< |
static int i_avlist; /* index for lists */ |
| 577 |
< |
|
| 578 |
< |
|
| 579 |
< |
static |
| 580 |
< |
av2list(av) |
| 581 |
< |
register AMBVAL *av; |
| 792 |
> |
static void |
| 793 |
> |
avfree(AMBVAL *av) |
| 794 |
|
{ |
| 795 |
< |
#ifdef DEBUG |
| 584 |
< |
if (i_avlist >= nambvals) |
| 585 |
< |
error(CONSISTENCY, "too many ambient values in av2list1"); |
| 586 |
< |
#endif |
| 587 |
< |
avlist1[i_avlist].p = avlist2[i_avlist] = av; |
| 588 |
< |
avlist1[i_avlist++].t = av->latick; |
| 795 |
> |
free(av); |
| 796 |
|
} |
| 797 |
|
|
| 798 |
|
|
| 799 |
< |
static int |
| 800 |
< |
alatcmp(av1, av2) /* compare ambient values for MRA */ |
| 594 |
< |
struct avl *av1, *av2; |
| 799 |
> |
static void |
| 800 |
> |
sortambvals(void) /* resort ambient values */ |
| 801 |
|
{ |
| 802 |
< |
register long lc = av2->t - av1->t; |
| 597 |
< |
return(lc<0 ? -1 : lc>0 ? 1 : 0); |
| 598 |
< |
} |
| 802 |
> |
AMBTREE oldatrunk = atrunk; |
| 803 |
|
|
| 804 |
< |
|
| 805 |
< |
static int |
| 806 |
< |
aposcmp(avp1, avp2) /* compare ambient value positions */ |
| 603 |
< |
AMBVAL **avp1, **avp2; |
| 604 |
< |
{ |
| 605 |
< |
return(*avp1 - *avp2); |
| 804 |
> |
atrunk.alist = NULL; |
| 805 |
> |
atrunk.kid = NULL; |
| 806 |
> |
unloadatree(&oldatrunk, avinsert); |
| 807 |
|
} |
| 808 |
|
|
| 809 |
|
|
| 810 |
< |
#if 1 |
| 811 |
< |
static int |
| 611 |
< |
avlmemi(avaddr) /* find list position from address */ |
| 612 |
< |
AMBVAL *avaddr; |
| 810 |
> |
int |
| 811 |
> |
ambsync(void) /* synchronize ambient file */ |
| 812 |
|
{ |
| 813 |
< |
register AMBVAL **avlpp; |
| 813 |
> |
off_t newpos; |
| 814 |
> |
int n; |
| 815 |
> |
AMBVAL avs; |
| 816 |
|
|
| 817 |
< |
avlpp = (AMBVAL **)bsearch((char *)&avaddr, (char *)avlist2, |
| 818 |
< |
nambvals, sizeof(AMBVAL *), aposcmp); |
| 618 |
< |
if (avlpp == NULL) |
| 619 |
< |
error(CONSISTENCY, "address not found in avlmemi"); |
| 620 |
< |
return(avlpp - avlist2); |
| 621 |
< |
} |
| 622 |
< |
#else |
| 623 |
< |
#define avlmemi(avaddr) ((AMBVAL **)bsearch((char *)&avaddr,(char *)avlist2, \ |
| 624 |
< |
nambvals,sizeof(AMBVAL *),aposcmp) - avlist2) |
| 625 |
< |
#endif |
| 817 |
> |
if (ambfp == NULL) /* no ambient file? */ |
| 818 |
> |
return(0); |
| 819 |
|
|
| 820 |
+ |
if (nunflshed > 0) { /* append new values? */ |
| 821 |
+ |
if (fflush(ambfp) < 0) |
| 822 |
+ |
return(EOF); |
| 823 |
+ |
newpos = lseek(fileno(ambfp), 0, SEEK_CUR); |
| 824 |
+ |
} else |
| 825 |
+ |
newpos = lseek(fileno(ambfp), 0, SEEK_END); |
| 826 |
|
|
| 827 |
< |
static |
| 828 |
< |
sortambvals(always) /* resort ambient values */ |
| 829 |
< |
int always; |
| 830 |
< |
{ |
| 831 |
< |
AMBTREE oldatrunk; |
| 832 |
< |
AMBVAL tav, *tap, *pnext; |
| 833 |
< |
register int i, j; |
| 834 |
< |
/* see if it's time yet */ |
| 636 |
< |
if (!always && (ambclock++ < lastsort+sortintvl || |
| 637 |
< |
nambvals < SORT_THRESH)) |
| 638 |
< |
return; |
| 639 |
< |
/* |
| 640 |
< |
* The idea here is to minimize memory thrashing |
| 641 |
< |
* in VM systems by improving reference locality. |
| 642 |
< |
* We do this by periodically sorting our stored ambient |
| 643 |
< |
* values in memory in order of most recently to least |
| 644 |
< |
* recently accessed. This ordering was chosen so that new |
| 645 |
< |
* ambient values (which tend to be less important) go into |
| 646 |
< |
* higher memory with the infrequently accessed values. |
| 647 |
< |
* Since we expect our values to need sorting less |
| 648 |
< |
* frequently as the process continues, we double our |
| 649 |
< |
* waiting interval after each call. |
| 650 |
< |
* This routine is also called by setambacc() with |
| 651 |
< |
* the "always" parameter set to 1 so that the ambient |
| 652 |
< |
* tree will be rebuilt with the new accuracy parameter. |
| 653 |
< |
*/ |
| 654 |
< |
if (tracktime) { /* allocate pointer arrays to sort */ |
| 655 |
< |
avlist2 = (AMBVAL **)malloc(nambvals*sizeof(AMBVAL *)); |
| 656 |
< |
avlist1 = (struct avl *)malloc(nambvals*sizeof(struct avl)); |
| 657 |
< |
} else { |
| 658 |
< |
avlist2 = NULL; |
| 659 |
< |
avlist1 = NULL; |
| 827 |
> |
if (newpos < 0) |
| 828 |
> |
goto seekerr; |
| 829 |
> |
/* how many others added? */ |
| 830 |
> |
n = (newpos - lastpos)/AMBVALSIZ - nunflshed; |
| 831 |
> |
nunflshed = 0; |
| 832 |
> |
if (n <= 0) { /* no one helping this time? */ |
| 833 |
> |
lastpos = newpos; |
| 834 |
> |
return(0); |
| 835 |
|
} |
| 836 |
< |
if (avlist1 == NULL) { /* no time tracking -- rebuild tree? */ |
| 837 |
< |
if (avlist2 != NULL) |
| 838 |
< |
free((char *)avlist2); |
| 839 |
< |
if (always) { /* rebuild without sorting */ |
| 840 |
< |
copystruct(&oldatrunk, &atrunk); |
| 841 |
< |
atrunk.alist = NULL; |
| 667 |
< |
atrunk.kid = NULL; |
| 668 |
< |
unloadatree(&oldatrunk, avinsert); |
| 836 |
> |
if (ambinp == NULL) { /* else need to open for input? */ |
| 837 |
> |
ambinp = fopen(ambfile, "r"); |
| 838 |
> |
if (ambinp == NULL) { |
| 839 |
> |
sprintf(errmsg, "cannot reopen ambient file \"%s\"", |
| 840 |
> |
ambfile); |
| 841 |
> |
error(SYSTEM, errmsg); |
| 842 |
|
} |
| 843 |
< |
} else { /* sort memory by last access time */ |
| 671 |
< |
/* |
| 672 |
< |
* Sorting memory is tricky because it isn't contiguous. |
| 673 |
< |
* We have to sort an array of pointers by MRA and also |
| 674 |
< |
* by memory position. We then copy values in "loops" |
| 675 |
< |
* to minimize memory hits. Nevertheless, we will visit |
| 676 |
< |
* everyone at least twice, and this is an expensive process |
| 677 |
< |
* when we're thrashing, which is when we need to do it. |
| 678 |
< |
*/ |
| 679 |
< |
#ifdef DEBUG |
| 680 |
< |
sprintf(errmsg, "sorting %u ambient values at ambclock=%lu...", |
| 681 |
< |
nambvals, ambclock); |
| 682 |
< |
eputs(errmsg); |
| 683 |
< |
#endif |
| 684 |
< |
i_avlist = 0; |
| 685 |
< |
unloadatree(&atrunk, av2list); /* empty current tree */ |
| 686 |
< |
#ifdef DEBUG |
| 687 |
< |
if (i_avlist < nambvals) |
| 688 |
< |
error(CONSISTENCY, "missing ambient values in sortambvals"); |
| 689 |
< |
#endif |
| 690 |
< |
qsort((char *)avlist1, nambvals, sizeof(struct avl), alatcmp); |
| 691 |
< |
qsort((char *)avlist2, nambvals, sizeof(AMBVAL *), aposcmp); |
| 692 |
< |
for (i = 0; i < nambvals; i++) { |
| 693 |
< |
if (avlist1[i].p == NULL) |
| 694 |
< |
continue; |
| 695 |
< |
tap = avlist2[i]; |
| 696 |
< |
copystruct(&tav, tap); |
| 697 |
< |
for (j = i; (pnext = avlist1[j].p) != tap; |
| 698 |
< |
j = avlmemi(pnext)) { |
| 699 |
< |
copystruct(avlist2[j], pnext); |
| 700 |
< |
avinsert(avlist2[j]); |
| 701 |
< |
avlist1[j].p = NULL; |
| 702 |
< |
} |
| 703 |
< |
copystruct(avlist2[j], &tav); |
| 704 |
< |
avinsert(avlist2[j]); |
| 705 |
< |
avlist1[j].p = NULL; |
| 706 |
< |
} |
| 707 |
< |
free((char *)avlist1); |
| 708 |
< |
free((char *)avlist2); |
| 709 |
< |
/* compute new sort interval */ |
| 710 |
< |
sortintvl = ambclock - lastsort; |
| 711 |
< |
if (sortintvl >= MAX_SORT_INTVL/2) |
| 712 |
< |
sortintvl = MAX_SORT_INTVL; |
| 713 |
< |
else |
| 714 |
< |
sortintvl <<= 1; /* wait twice as long next */ |
| 715 |
< |
#ifdef DEBUG |
| 716 |
< |
eputs("done\n"); |
| 717 |
< |
#endif |
| 843 |
> |
SET_FILE_BINARY(ambinp); |
| 844 |
|
} |
| 845 |
< |
if (ambclock >= MAXACLOCK) |
| 846 |
< |
ambclock = MAXACLOCK/2; |
| 721 |
< |
lastsort = ambclock; |
| 722 |
< |
} |
| 723 |
< |
|
| 724 |
< |
|
| 725 |
< |
#ifdef F_SETLKW |
| 726 |
< |
|
| 727 |
< |
static |
| 728 |
< |
aflock(typ) /* lock/unlock ambient file */ |
| 729 |
< |
int typ; |
| 730 |
< |
{ |
| 731 |
< |
static struct flock fls; /* static so initialized to zeroes */ |
| 732 |
< |
|
| 733 |
< |
fls.l_type = typ; |
| 734 |
< |
if (fcntl(fileno(ambfp), F_SETLKW, &fls) < 0) |
| 735 |
< |
error(SYSTEM, "cannot (un)lock ambient file"); |
| 736 |
< |
} |
| 737 |
< |
|
| 738 |
< |
|
| 739 |
< |
int |
| 740 |
< |
ambsync() /* synchronize ambient file */ |
| 741 |
< |
{ |
| 742 |
< |
static FILE *ambinp = NULL; |
| 743 |
< |
static long lastpos = -1; |
| 744 |
< |
long flen; |
| 745 |
< |
AMBVAL avs; |
| 746 |
< |
register int n; |
| 747 |
< |
|
| 748 |
< |
if (nunflshed == 0) |
| 749 |
< |
return(0); |
| 750 |
< |
if (lastpos < 0) /* initializing (locked in initambfile) */ |
| 751 |
< |
goto syncend; |
| 752 |
< |
/* gain exclusive access */ |
| 753 |
< |
aflock(F_WRLCK); |
| 754 |
< |
/* see if file has grown */ |
| 755 |
< |
if ((flen = lseek(fileno(ambfp), 0L, 2)) < 0) |
| 845 |
> |
/* read from last endpoint */ |
| 846 |
> |
if (fseeko(ambinp, lastpos, SEEK_SET) < 0) |
| 847 |
|
goto seekerr; |
| 848 |
< |
if (n = flen - lastpos) { /* file has grown */ |
| 849 |
< |
if (ambinp == NULL) { /* use duplicate filedes */ |
| 850 |
< |
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
| 851 |
< |
if (ambinp == NULL) |
| 852 |
< |
error(SYSTEM, "fdopen failed in ambsync"); |
| 848 |
> |
while (n-- > 0) { /* load new contributed values */ |
| 849 |
> |
if (!readambval(&avs, ambinp)) { |
| 850 |
> |
sprintf(errmsg, "ambient file \"%s\" corrupted", |
| 851 |
> |
ambfile); |
| 852 |
> |
error(WARNING, errmsg); |
| 853 |
> |
break; |
| 854 |
|
} |
| 855 |
< |
if (fseek(ambinp, lastpos, 0) < 0) |
| 764 |
< |
goto seekerr; |
| 765 |
< |
while (n >= AMBVALSIZ) { /* load contributed values */ |
| 766 |
< |
if (!readambval(&avs, ambinp)) { |
| 767 |
< |
sprintf(errmsg, |
| 768 |
< |
"ambient file corrupted near character %ld", |
| 769 |
< |
flen - n); |
| 770 |
< |
error(WARNING, errmsg); |
| 771 |
< |
break; |
| 772 |
< |
} |
| 773 |
< |
avinsert(avstore(&avs)); |
| 774 |
< |
n -= AMBVALSIZ; |
| 775 |
< |
} |
| 776 |
< |
/*** seek always as safety measure |
| 777 |
< |
if (n) ***/ /* alignment */ |
| 778 |
< |
if (lseek(fileno(ambfp), flen-n, 0) < 0) |
| 779 |
< |
goto seekerr; |
| 855 |
> |
avstore(&avs); |
| 856 |
|
} |
| 857 |
< |
#ifdef DEBUG |
| 858 |
< |
if (ambfp->_ptr - ambfp->_base != nunflshed*AMBVALSIZ) { |
| 783 |
< |
sprintf(errmsg, "ambient file buffer at %d rather than %d", |
| 784 |
< |
ambfp->_ptr - ambfp->_base, |
| 785 |
< |
nunflshed*AMBVALSIZ); |
| 786 |
< |
error(CONSISTENCY, errmsg); |
| 787 |
< |
} |
| 788 |
< |
#endif |
| 789 |
< |
syncend: |
| 790 |
< |
n = fflush(ambfp); /* calls write() at last */ |
| 791 |
< |
if ((lastpos = lseek(fileno(ambfp), 0L, 1)) < 0) |
| 792 |
< |
goto seekerr; |
| 793 |
< |
aflock(F_UNLCK); /* release file */ |
| 794 |
< |
nunflshed = 0; |
| 795 |
< |
return(n); |
| 857 |
> |
lastpos = newpos; /* update endpoint */ |
| 858 |
> |
return(0); |
| 859 |
|
seekerr: |
| 860 |
|
error(SYSTEM, "seek failed in ambsync"); |
| 861 |
+ |
return(EOF); /* pro forma return */ |
| 862 |
|
} |
| 799 |
– |
|
| 800 |
– |
#else |
| 801 |
– |
|
| 802 |
– |
int |
| 803 |
– |
ambsync() /* flush ambient file */ |
| 804 |
– |
{ |
| 805 |
– |
if (nunflshed == 0) |
| 806 |
– |
return(0); |
| 807 |
– |
nunflshed = 0; |
| 808 |
– |
return(fflush(ambfp)); |
| 809 |
– |
} |
| 810 |
– |
|
| 811 |
– |
#endif |
