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/* Copyright (c) 1991 Regents of the University of California */ |
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|
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#ifndef lint |
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< |
static char SCCSid[] = "$SunId$ LBL"; |
| 2 |
> |
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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> |
* Declarations of external symbols in ambient.h |
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*/ |
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|
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/* ==================================================================== |
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* The Radiance Software License, Version 1.0 |
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* |
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< |
* 5/9/86 |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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> |
* |
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> |
* 5. Products derived from this software may not be called "Radiance", |
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> |
* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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> |
* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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> |
* SUCH DAMAGE. |
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> |
* ==================================================================== |
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> |
* |
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> |
* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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> |
* information on Lawrence Berkeley National Laboratory, please see |
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> |
* <http://www.lbl.gov/>. |
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*/ |
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|
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|
#include "ray.h" |
| 68 |
|
|
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– |
#include "octree.h" |
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– |
|
| 69 |
|
#include "otypes.h" |
| 70 |
|
|
| 71 |
|
#include "ambient.h" |
| 72 |
|
|
| 73 |
|
#include "random.h" |
| 74 |
|
|
| 75 |
< |
#define OCTSCALE 0.5 /* ceil((valid rad.)/(cube size)) */ |
| 75 |
> |
#ifndef OCTSCALE |
| 76 |
> |
#define OCTSCALE 1.0 /* ceil((valid rad.)/(cube size)) */ |
| 77 |
> |
#endif |
| 78 |
|
|
| 79 |
< |
typedef struct ambtree { |
| 29 |
< |
AMBVAL *alist; /* ambient value list */ |
| 30 |
< |
struct ambtree *kid; /* 8 child nodes */ |
| 31 |
< |
} AMBTREE; /* ambient octree */ |
| 79 |
> |
extern char *shm_boundary; /* memory sharing boundary */ |
| 80 |
|
|
| 81 |
< |
extern CUBE thescene; /* contains space boundaries */ |
| 81 |
> |
#define MAXASET 511 /* maximum number of elements in ambient set */ |
| 82 |
> |
OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
| 83 |
|
|
| 84 |
< |
#define MAXASET 511 /* maximum number of elements in ambient set */ |
| 85 |
< |
OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
| 84 |
> |
double maxarad; /* maximum ambient radius */ |
| 85 |
> |
double minarad; /* minimum ambient radius */ |
| 86 |
|
|
| 87 |
< |
double maxarad; /* maximum ambient radius */ |
| 39 |
< |
double minarad; /* minimum ambient radius */ |
| 87 |
> |
static AMBTREE atrunk; /* our ambient trunk node */ |
| 88 |
|
|
| 41 |
– |
static AMBTREE atrunk; /* our ambient trunk node */ |
| 42 |
– |
|
| 89 |
|
static FILE *ambfp = NULL; /* ambient file pointer */ |
| 90 |
+ |
static int nunflshed = 0; /* number of unflushed ambient values */ |
| 91 |
|
|
| 92 |
< |
#define newambval() (AMBVAL *)bmalloc(sizeof(AMBVAL)) |
| 92 |
> |
#ifndef SORT_THRESH |
| 93 |
> |
#ifdef BIGMEM |
| 94 |
> |
#define SORT_THRESH ((9L<<20)/sizeof(AMBVAL)) |
| 95 |
> |
#else |
| 96 |
> |
#define SORT_THRESH ((3L<<20)/sizeof(AMBVAL)) |
| 97 |
> |
#endif |
| 98 |
> |
#endif |
| 99 |
> |
#ifndef SORT_INTVL |
| 100 |
> |
#define SORT_INTVL (SORT_THRESH<<1) |
| 101 |
> |
#endif |
| 102 |
> |
#ifndef MAX_SORT_INTVL |
| 103 |
> |
#define MAX_SORT_INTVL (SORT_INTVL<<6) |
| 104 |
> |
#endif |
| 105 |
|
|
| 106 |
< |
#define newambtree() (AMBTREE *)calloc(8, sizeof(AMBTREE)) |
| 106 |
> |
static double avsum = 0.; /* computed ambient value sum (log) */ |
| 107 |
> |
static unsigned int navsum = 0; /* number of values in avsum */ |
| 108 |
> |
static unsigned int nambvals = 0; /* total number of indirect values */ |
| 109 |
> |
static unsigned int nambshare = 0; /* number of values from file */ |
| 110 |
> |
static unsigned long ambclock = 0; /* ambient access clock */ |
| 111 |
> |
static unsigned long lastsort = 0; /* time of last value sort */ |
| 112 |
> |
static long sortintvl = SORT_INTVL; /* time until next sort */ |
| 113 |
> |
static FILE *ambinp = NULL; /* auxiliary file for input */ |
| 114 |
> |
static long lastpos = -1; /* last flush position */ |
| 115 |
|
|
| 116 |
+ |
#define MAXACLOCK (1L<<30) /* clock turnover value */ |
| 117 |
+ |
/* |
| 118 |
+ |
* Track access times unless we are sharing ambient values |
| 119 |
+ |
* through memory on a multiprocessor, when we want to avoid |
| 120 |
+ |
* claiming our own memory (copy on write). Go ahead anyway |
| 121 |
+ |
* if more than two thirds of our values are unshared. |
| 122 |
+ |
* Compile with -Dtracktime=0 to turn this code off. |
| 123 |
+ |
*/ |
| 124 |
+ |
#ifndef tracktime |
| 125 |
+ |
#define tracktime (shm_boundary == NULL || nambvals > 3*nambshare) |
| 126 |
+ |
#endif |
| 127 |
|
|
| 128 |
< |
setambient(afile) /* initialize calculation */ |
| 129 |
< |
char *afile; |
| 128 |
> |
#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
| 129 |
> |
|
| 130 |
> |
#define newambval() (AMBVAL *)malloc(sizeof(AMBVAL)) |
| 131 |
> |
#define freeav(av) free((void *)av); |
| 132 |
> |
|
| 133 |
> |
static void initambfile(), avsave(), avinsert(), sortambvals(), unloadatree(); |
| 134 |
> |
static int avlmemi(); |
| 135 |
> |
static AMBVAL *avstore(); |
| 136 |
> |
#ifdef F_SETLKW |
| 137 |
> |
static void aflock(); |
| 138 |
> |
#endif |
| 139 |
> |
|
| 140 |
> |
|
| 141 |
> |
void |
| 142 |
> |
setambres(ar) /* set ambient resolution */ |
| 143 |
> |
int ar; |
| 144 |
|
{ |
| 145 |
< |
long ftell(); |
| 146 |
< |
AMBVAL amb; |
| 145 |
> |
ambres = ar < 0 ? 0 : ar; /* may be done already */ |
| 146 |
> |
/* set min & max radii */ |
| 147 |
> |
if (ar <= 0) { |
| 148 |
> |
minarad = 0; |
| 149 |
> |
maxarad = thescene.cusize / 2.0; |
| 150 |
> |
} else { |
| 151 |
> |
minarad = thescene.cusize / ar; |
| 152 |
> |
maxarad = 64 * minarad; /* heuristic */ |
| 153 |
> |
if (maxarad > thescene.cusize / 2.0) |
| 154 |
> |
maxarad = thescene.cusize / 2.0; |
| 155 |
> |
} |
| 156 |
> |
if (minarad <= FTINY) |
| 157 |
> |
minarad = 10*FTINY; |
| 158 |
> |
if (maxarad <= minarad) |
| 159 |
> |
maxarad = 64 * minarad; |
| 160 |
> |
} |
| 161 |
|
|
| 56 |
– |
maxarad = thescene.cusize / 2.0; /* maximum radius */ |
| 57 |
– |
/* minimum radius */ |
| 58 |
– |
minarad = ambres > 0 ? thescene.cusize/ambres : 0.0; |
| 162 |
|
|
| 163 |
< |
/* open ambient file */ |
| 164 |
< |
if (afile != NULL) |
| 165 |
< |
if ((ambfp = fopen(afile, "r+")) != NULL) { |
| 166 |
< |
while (fread((char *)&amb,sizeof(AMBVAL),1,ambfp) == 1) |
| 167 |
< |
avinsert(&amb, &atrunk, thescene.cuorg, |
| 168 |
< |
thescene.cusize); |
| 169 |
< |
/* align */ |
| 170 |
< |
fseek(ambfp, -(ftell(ambfp)%sizeof(AMBVAL)), 1); |
| 171 |
< |
} else if ((ambfp = fopen(afile, "w")) == NULL) { |
| 172 |
< |
sprintf(errmsg, "cannot open ambient file \"%s\"", |
| 173 |
< |
afile); |
| 174 |
< |
error(SYSTEM, errmsg); |
| 163 |
> |
void |
| 164 |
> |
setambacc(newa) /* set ambient accuracy */ |
| 165 |
> |
double newa; |
| 166 |
> |
{ |
| 167 |
> |
double ambdiff; |
| 168 |
> |
|
| 169 |
> |
if (newa < 0.0) |
| 170 |
> |
newa = 0.0; |
| 171 |
> |
ambdiff = fabs(newa - ambacc); |
| 172 |
> |
if (ambdiff >= .01 && (ambacc = newa) > FTINY && nambvals > 0) |
| 173 |
> |
sortambvals(1); /* rebuild tree */ |
| 174 |
> |
} |
| 175 |
> |
|
| 176 |
> |
|
| 177 |
> |
void |
| 178 |
> |
setambient() /* initialize calculation */ |
| 179 |
> |
{ |
| 180 |
> |
int readonly = 0; |
| 181 |
> |
long pos, flen; |
| 182 |
> |
AMBVAL amb; |
| 183 |
> |
/* make sure we're fresh */ |
| 184 |
> |
ambdone(); |
| 185 |
> |
/* init ambient limits */ |
| 186 |
> |
setambres(ambres); |
| 187 |
> |
setambacc(ambacc); |
| 188 |
> |
if (ambfile == NULL || !ambfile[0]) |
| 189 |
> |
return; |
| 190 |
> |
if (ambacc <= FTINY) { |
| 191 |
> |
sprintf(errmsg, "zero ambient accuracy so \"%s\" not opened", |
| 192 |
> |
ambfile); |
| 193 |
> |
error(WARNING, errmsg); |
| 194 |
> |
return; |
| 195 |
> |
} |
| 196 |
> |
/* open ambient file */ |
| 197 |
> |
if ((ambfp = fopen(ambfile, "r+")) == NULL) |
| 198 |
> |
readonly = (ambfp = fopen(ambfile, "r")) != NULL; |
| 199 |
> |
if (ambfp != NULL) { |
| 200 |
> |
initambfile(0); /* file exists */ |
| 201 |
> |
pos = ftell(ambfp); |
| 202 |
> |
while (readambval(&amb, ambfp)) |
| 203 |
> |
avinsert(avstore(&amb)); |
| 204 |
> |
nambshare = nambvals; /* share loaded values */ |
| 205 |
> |
if (readonly) { |
| 206 |
> |
sprintf(errmsg, |
| 207 |
> |
"loaded %u values from read-only ambient file", |
| 208 |
> |
nambvals); |
| 209 |
> |
error(WARNING, errmsg); |
| 210 |
> |
fclose(ambfp); /* close file so no writes */ |
| 211 |
> |
ambfp = NULL; |
| 212 |
> |
return; /* avoid ambsync() */ |
| 213 |
|
} |
| 214 |
+ |
/* align file pointer */ |
| 215 |
+ |
pos += (long)nambvals*AMBVALSIZ; |
| 216 |
+ |
flen = lseek(fileno(ambfp), (off_t)0L, 2); |
| 217 |
+ |
if (flen != pos) { |
| 218 |
+ |
sprintf(errmsg, |
| 219 |
+ |
"ignoring last %ld values in ambient file (corrupted)", |
| 220 |
+ |
(flen - pos)/AMBVALSIZ); |
| 221 |
+ |
error(WARNING, errmsg); |
| 222 |
+ |
fseek(ambfp, pos, 0); |
| 223 |
+ |
ftruncate(fileno(ambfp), (off_t)pos); |
| 224 |
+ |
} |
| 225 |
+ |
} else if ((ambfp = fopen(ambfile, "w+")) != NULL) { |
| 226 |
+ |
initambfile(1); /* else create new file */ |
| 227 |
+ |
} else { |
| 228 |
+ |
sprintf(errmsg, "cannot open ambient file \"%s\"", ambfile); |
| 229 |
+ |
error(SYSTEM, errmsg); |
| 230 |
+ |
} |
| 231 |
+ |
nunflshed++; /* lie */ |
| 232 |
+ |
ambsync(); |
| 233 |
|
} |
| 234 |
|
|
| 235 |
|
|
| 236 |
+ |
void |
| 237 |
+ |
ambdone() /* close ambient file and free memory */ |
| 238 |
+ |
{ |
| 239 |
+ |
if (ambfp != NULL) { /* close ambient file */ |
| 240 |
+ |
ambsync(); |
| 241 |
+ |
fclose(ambfp); |
| 242 |
+ |
ambfp = NULL; |
| 243 |
+ |
if (ambinp != NULL) { |
| 244 |
+ |
fclose(ambinp); |
| 245 |
+ |
ambinp = NULL; |
| 246 |
+ |
} |
| 247 |
+ |
lastpos = -1; |
| 248 |
+ |
} |
| 249 |
+ |
/* free ambient tree */ |
| 250 |
+ |
unloadatree(&atrunk, free); |
| 251 |
+ |
/* reset state variables */ |
| 252 |
+ |
avsum = 0.; |
| 253 |
+ |
navsum = 0; |
| 254 |
+ |
nambvals = 0; |
| 255 |
+ |
nambshare = 0; |
| 256 |
+ |
ambclock = 0; |
| 257 |
+ |
lastsort = 0; |
| 258 |
+ |
sortintvl = SORT_INTVL; |
| 259 |
+ |
} |
| 260 |
+ |
|
| 261 |
+ |
|
| 262 |
+ |
void |
| 263 |
|
ambnotify(obj) /* record new modifier */ |
| 264 |
< |
OBJECT obj; |
| 264 |
> |
OBJECT obj; |
| 265 |
|
{ |
| 266 |
|
static int hitlimit = 0; |
| 267 |
< |
register OBJREC *o = objptr(obj); |
| 267 |
> |
register OBJREC *o; |
| 268 |
|
register char **amblp; |
| 269 |
|
|
| 270 |
+ |
if (obj == OVOID) { /* starting over */ |
| 271 |
+ |
ambset[0] = 0; |
| 272 |
+ |
hitlimit = 0; |
| 273 |
+ |
return; |
| 274 |
+ |
} |
| 275 |
+ |
o = objptr(obj); |
| 276 |
|
if (hitlimit || !ismodifier(o->otype)) |
| 277 |
|
return; |
| 278 |
|
for (amblp = amblist; *amblp != NULL; amblp++) |
| 288 |
|
} |
| 289 |
|
|
| 290 |
|
|
| 291 |
< |
ambient(acol, r) /* compute ambient component for ray */ |
| 291 |
> |
void |
| 292 |
> |
ambient(acol, r, nrm) /* compute ambient component for ray */ |
| 293 |
|
COLOR acol; |
| 294 |
|
register RAY *r; |
| 295 |
+ |
FVECT nrm; |
| 296 |
|
{ |
| 297 |
|
static int rdepth = 0; /* ambient recursion */ |
| 298 |
< |
double d; |
| 298 |
> |
double d, l; |
| 299 |
|
|
| 300 |
|
if (ambdiv <= 0) /* no ambient calculation */ |
| 301 |
|
goto dumbamb; |
| 311 |
|
rdepth++; |
| 312 |
|
d = doambient(acol, r, r->rweight, NULL, NULL); |
| 313 |
|
rdepth--; |
| 314 |
< |
if (d == 0.0) |
| 314 |
> |
if (d <= FTINY) |
| 315 |
|
goto dumbamb; |
| 316 |
|
return; |
| 317 |
|
} |
| 318 |
+ |
|
| 319 |
+ |
if (tracktime) /* sort to minimize thrashing */ |
| 320 |
+ |
sortambvals(0); |
| 321 |
|
/* get ambient value */ |
| 322 |
|
setcolor(acol, 0.0, 0.0, 0.0); |
| 323 |
< |
d = sumambient(acol, r, rdepth, |
| 323 |
> |
d = sumambient(acol, r, nrm, rdepth, |
| 324 |
|
&atrunk, thescene.cuorg, thescene.cusize); |
| 325 |
< |
if (d > FTINY) |
| 325 |
> |
if (d > FTINY) { |
| 326 |
|
scalecolor(acol, 1.0/d); |
| 327 |
< |
else { |
| 130 |
< |
d = makeambient(acol, r, rdepth++); |
| 131 |
< |
rdepth--; |
| 327 |
> |
return; |
| 328 |
|
} |
| 329 |
+ |
rdepth++; /* need to cache new value */ |
| 330 |
+ |
d = makeambient(acol, r, nrm, rdepth-1); |
| 331 |
+ |
rdepth--; |
| 332 |
|
if (d > FTINY) |
| 333 |
|
return; |
| 334 |
|
dumbamb: /* return global value */ |
| 335 |
|
copycolor(acol, ambval); |
| 336 |
+ |
if (ambvwt <= 0 | navsum == 0) |
| 337 |
+ |
return; |
| 338 |
+ |
l = bright(ambval); /* average in computations */ |
| 339 |
+ |
if (l > FTINY) { |
| 340 |
+ |
d = (log(l)*(double)ambvwt + avsum) / |
| 341 |
+ |
(double)(ambvwt + navsum); |
| 342 |
+ |
d = exp(d) / l; |
| 343 |
+ |
scalecolor(acol, d); /* apply color of ambval */ |
| 344 |
+ |
} else { |
| 345 |
+ |
d = exp( avsum / (double)navsum ); |
| 346 |
+ |
setcolor(acol, d, d, d); /* neutral color */ |
| 347 |
+ |
} |
| 348 |
|
} |
| 349 |
|
|
| 350 |
|
|
| 351 |
|
double |
| 352 |
< |
sumambient(acol, r, al, at, c0, s) /* get interpolated ambient value */ |
| 352 |
> |
sumambient(acol, r, rn, al, at, c0, s) /* get interpolated ambient value */ |
| 353 |
|
COLOR acol; |
| 354 |
|
register RAY *r; |
| 355 |
+ |
FVECT rn; |
| 356 |
|
int al; |
| 357 |
< |
AMBTREE *at; |
| 357 |
> |
AMBTREE *at; |
| 358 |
|
FVECT c0; |
| 359 |
< |
double s; |
| 359 |
> |
double s; |
| 360 |
|
{ |
| 361 |
< |
extern double sqrt(); |
| 150 |
< |
double d, e1, e2, wt, wsum; |
| 361 |
> |
double d, e1, e2, wt, wsum; |
| 362 |
|
COLOR ct; |
| 363 |
|
FVECT ck0; |
| 364 |
|
int i; |
| 365 |
|
register int j; |
| 366 |
< |
register AMBVAL *av; |
| 367 |
< |
/* do this node */ |
| 366 |
> |
register AMBVAL *av; |
| 367 |
> |
|
| 368 |
|
wsum = 0.0; |
| 369 |
+ |
/* do this node */ |
| 370 |
|
for (av = at->alist; av != NULL; av = av->next) { |
| 371 |
+ |
double rn_dot = -2.0; |
| 372 |
+ |
if (tracktime) |
| 373 |
+ |
av->latick = ambclock; |
| 374 |
|
/* |
| 375 |
|
* Ambient level test. |
| 376 |
|
*/ |
| 377 |
< |
if (av->lvl > al || av->weight < r->rweight-FTINY) |
| 377 |
> |
if (av->lvl > al) /* list sorted, so this works */ |
| 378 |
> |
break; |
| 379 |
> |
if (av->weight < r->rweight-FTINY) |
| 380 |
|
continue; |
| 381 |
|
/* |
| 382 |
|
* Ambient radius test. |
| 383 |
|
*/ |
| 384 |
< |
e1 = 0.0; |
| 385 |
< |
for (j = 0; j < 3; j++) { |
| 386 |
< |
d = av->pos[j] - r->rop[j]; |
| 387 |
< |
e1 += d * d; |
| 388 |
< |
} |
| 384 |
> |
d = av->pos[0] - r->rop[0]; |
| 385 |
> |
e1 = d * d; |
| 386 |
> |
d = av->pos[1] - r->rop[1]; |
| 387 |
> |
e1 += d * d; |
| 388 |
> |
d = av->pos[2] - r->rop[2]; |
| 389 |
> |
e1 += d * d; |
| 390 |
|
e1 /= av->rad * av->rad; |
| 391 |
|
if (e1 > ambacc*ambacc*1.21) |
| 392 |
|
continue; |
| 393 |
|
/* |
| 394 |
< |
* Normal direction test. |
| 394 |
> |
* Direction test using closest normal. |
| 395 |
|
*/ |
| 396 |
< |
e2 = (1.0 - DOT(av->dir, r->ron)) * r->rweight; |
| 396 |
> |
d = DOT(av->dir, r->ron); |
| 397 |
> |
if (rn != r->ron) { |
| 398 |
> |
rn_dot = DOT(av->dir, rn); |
| 399 |
> |
if (rn_dot > 1.0-FTINY) |
| 400 |
> |
rn_dot = 1.0-FTINY; |
| 401 |
> |
if (rn_dot >= d-FTINY) { |
| 402 |
> |
d = rn_dot; |
| 403 |
> |
rn_dot = -2.0; |
| 404 |
> |
} |
| 405 |
> |
} |
| 406 |
> |
e2 = (1.0 - d) * r->rweight; |
| 407 |
|
if (e2 < 0.0) e2 = 0.0; |
| 408 |
|
if (e1 + e2 > ambacc*ambacc*1.21) |
| 409 |
|
continue; |
| 419 |
|
/* |
| 420 |
|
* Jittering final test reduces image artifacts. |
| 421 |
|
*/ |
| 422 |
< |
wt = sqrt(e1) + sqrt(e2); |
| 423 |
< |
wt *= .9 + .2*urand(9015+samplendx); |
| 424 |
< |
if (wt > ambacc) |
| 422 |
> |
e1 = sqrt(e1); |
| 423 |
> |
e2 = sqrt(e2); |
| 424 |
> |
wt = e1 + e2; |
| 425 |
> |
if (wt > ambacc*(.9+.2*urand(9015+samplendx))) |
| 426 |
|
continue; |
| 427 |
+ |
/* |
| 428 |
+ |
* Recompute directional error using perturbed normal |
| 429 |
+ |
*/ |
| 430 |
+ |
if (rn_dot > 0.0) { |
| 431 |
+ |
e2 = sqrt((1.0 - rn_dot)*r->rweight); |
| 432 |
+ |
wt = e1 + e2; |
| 433 |
+ |
} |
| 434 |
|
if (wt <= 1e-3) |
| 435 |
|
wt = 1e3; |
| 436 |
|
else |
| 437 |
|
wt = 1.0 / wt; |
| 438 |
|
wsum += wt; |
| 439 |
< |
extambient(ct, av, r->rop, r->ron); |
| 439 |
> |
extambient(ct, av, r->rop, rn); |
| 440 |
|
scalecolor(ct, wt); |
| 441 |
|
addcolor(acol, ct); |
| 442 |
|
} |
| 455 |
|
break; |
| 456 |
|
} |
| 457 |
|
if (j == 3) |
| 458 |
< |
wsum += sumambient(acol, r, al, at->kid+i, ck0, s); |
| 458 |
> |
wsum += sumambient(acol, r, rn, al, at->kid+i, ck0, s); |
| 459 |
|
} |
| 460 |
|
return(wsum); |
| 461 |
|
} |
| 462 |
|
|
| 463 |
|
|
| 464 |
|
double |
| 465 |
< |
makeambient(acol, r, al) /* make a new ambient value */ |
| 465 |
> |
makeambient(acol, r, rn, al) /* make a new ambient value */ |
| 466 |
|
COLOR acol; |
| 467 |
|
register RAY *r; |
| 468 |
+ |
FVECT rn; |
| 469 |
|
int al; |
| 470 |
|
{ |
| 471 |
< |
AMBVAL amb; |
| 471 |
> |
AMBVAL amb; |
| 472 |
|
FVECT gp, gd; |
| 473 |
|
/* compute weight */ |
| 474 |
|
amb.weight = pow(AVGREFL, (double)al); |
| 475 |
< |
if (r->rweight < 0.2*amb.weight) /* heuristic */ |
| 475 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic */ |
| 476 |
|
amb.weight = r->rweight; |
| 477 |
|
/* compute ambient */ |
| 478 |
|
amb.rad = doambient(acol, r, amb.weight, gp, gd); |
| 479 |
< |
if (amb.rad == 0.0) |
| 479 |
> |
if (amb.rad <= FTINY) |
| 480 |
|
return(0.0); |
| 481 |
|
/* store it */ |
| 482 |
|
VCOPY(amb.pos, r->rop); |
| 486 |
|
VCOPY(amb.gpos, gp); |
| 487 |
|
VCOPY(amb.gdir, gd); |
| 488 |
|
/* insert into tree */ |
| 489 |
< |
avinsert(&amb, &atrunk, thescene.cuorg, thescene.cusize); |
| 490 |
< |
avsave(&amb); /* write to file */ |
| 489 |
> |
avsave(&amb); /* and save to file */ |
| 490 |
> |
if (rn != r->ron) |
| 491 |
> |
extambient(acol, &amb, r->rop, rn); /* texture */ |
| 492 |
|
return(amb.rad); |
| 493 |
|
} |
| 494 |
|
|
| 495 |
|
|
| 496 |
+ |
void |
| 497 |
|
extambient(cr, ap, pv, nv) /* extrapolate value at pv, nv */ |
| 498 |
|
COLOR cr; |
| 499 |
< |
register AMBVAL *ap; |
| 499 |
> |
register AMBVAL *ap; |
| 500 |
|
FVECT pv, nv; |
| 501 |
|
{ |
| 502 |
< |
FVECT v1, v2; |
| 502 |
> |
FVECT v1; |
| 503 |
|
register int i; |
| 504 |
< |
double d; |
| 504 |
> |
double d; |
| 505 |
|
|
| 506 |
|
d = 1.0; /* zeroeth order */ |
| 507 |
|
/* gradient due to translation */ |
| 508 |
|
for (i = 0; i < 3; i++) |
| 509 |
|
d += ap->gpos[i]*(pv[i]-ap->pos[i]); |
| 510 |
|
/* gradient due to rotation */ |
| 511 |
< |
VCOPY(v1, ap->dir); |
| 512 |
< |
fcross(v2, v1, nv); |
| 274 |
< |
d += DOT(ap->gdir, v2); |
| 511 |
> |
VCROSS(v1, ap->dir, nv); |
| 512 |
> |
d += DOT(ap->gdir, v1); |
| 513 |
|
if (d <= 0.0) { |
| 514 |
|
setcolor(cr, 0.0, 0.0, 0.0); |
| 515 |
|
return; |
| 519 |
|
} |
| 520 |
|
|
| 521 |
|
|
| 522 |
< |
static |
| 523 |
< |
avsave(av) /* save an ambient value */ |
| 524 |
< |
AMBVAL *av; |
| 522 |
> |
static void |
| 523 |
> |
initambfile(creat) /* initialize ambient file */ |
| 524 |
> |
int creat; |
| 525 |
|
{ |
| 526 |
< |
#ifdef AMBFLUSH |
| 527 |
< |
static int nunflshed = 0; |
| 526 |
> |
extern char *progname, *octname; |
| 527 |
> |
static char *mybuf = NULL; |
| 528 |
> |
|
| 529 |
> |
#ifdef F_SETLKW |
| 530 |
> |
aflock(creat ? F_WRLCK : F_RDLCK); |
| 531 |
|
#endif |
| 532 |
+ |
#ifdef MSDOS |
| 533 |
+ |
setmode(fileno(ambfp), O_BINARY); |
| 534 |
+ |
#endif |
| 535 |
+ |
if (mybuf == NULL) |
| 536 |
+ |
mybuf = (char *)bmalloc(BUFSIZ+8); |
| 537 |
+ |
setbuf(ambfp, mybuf); |
| 538 |
+ |
if (creat) { /* new file */ |
| 539 |
+ |
newheader("RADIANCE", ambfp); |
| 540 |
+ |
fprintf(ambfp, "%s -av %g %g %g -aw %d -ab %d -aa %g ", |
| 541 |
+ |
progname, colval(ambval,RED), |
| 542 |
+ |
colval(ambval,GRN), colval(ambval,BLU), |
| 543 |
+ |
ambvwt, ambounce, ambacc); |
| 544 |
+ |
fprintf(ambfp, "-ad %d -as %d -ar %d ", |
| 545 |
+ |
ambdiv, ambssamp, ambres); |
| 546 |
+ |
if (octname != NULL) |
| 547 |
+ |
printargs(1, &octname, ambfp); |
| 548 |
+ |
else |
| 549 |
+ |
fputc('\n', ambfp); |
| 550 |
+ |
fprintf(ambfp, "SOFTWARE= %s\n", VersionID); |
| 551 |
+ |
fputnow(ambfp); |
| 552 |
+ |
fputformat(AMBFMT, ambfp); |
| 553 |
+ |
putc('\n', ambfp); |
| 554 |
+ |
putambmagic(ambfp); |
| 555 |
+ |
} else if (checkheader(ambfp, AMBFMT, NULL) < 0 || !hasambmagic(ambfp)) |
| 556 |
+ |
error(USER, "bad ambient file"); |
| 557 |
+ |
} |
| 558 |
+ |
|
| 559 |
+ |
|
| 560 |
+ |
static void |
| 561 |
+ |
avsave(av) /* insert and save an ambient value */ |
| 562 |
+ |
AMBVAL *av; |
| 563 |
+ |
{ |
| 564 |
+ |
avinsert(avstore(av)); |
| 565 |
|
if (ambfp == NULL) |
| 566 |
|
return; |
| 567 |
< |
if (fwrite((char *)av, sizeof(AMBVAL), 1, ambfp) != 1) |
| 567 |
> |
if (writambval(av, ambfp) < 0) |
| 568 |
|
goto writerr; |
| 569 |
< |
#ifdef AMBFLUSH |
| 570 |
< |
if (++nunflshed >= AMBFLUSH) { |
| 297 |
< |
if (fflush(ambfp) == EOF) |
| 569 |
> |
if (++nunflshed >= AMBFLUSH) |
| 570 |
> |
if (ambsync() == EOF) |
| 571 |
|
goto writerr; |
| 299 |
– |
nunflshed = 0; |
| 300 |
– |
} |
| 301 |
– |
#endif |
| 572 |
|
return; |
| 573 |
|
writerr: |
| 574 |
< |
error(SYSTEM, "error writing ambient file"); |
| 574 |
> |
error(SYSTEM, "error writing to ambient file"); |
| 575 |
|
} |
| 576 |
|
|
| 577 |
|
|
| 578 |
< |
static |
| 579 |
< |
avinsert(aval, at, c0, s) /* insert ambient value in a tree */ |
| 580 |
< |
AMBVAL *aval; |
| 311 |
< |
register AMBTREE *at; |
| 312 |
< |
FVECT c0; |
| 313 |
< |
double s; |
| 578 |
> |
static AMBVAL * |
| 579 |
> |
avstore(aval) /* allocate memory and store aval */ |
| 580 |
> |
register AMBVAL *aval; |
| 581 |
|
{ |
| 315 |
– |
FVECT ck0; |
| 316 |
– |
int branch; |
| 582 |
|
register AMBVAL *av; |
| 583 |
< |
register int i; |
| 583 |
> |
double d; |
| 584 |
|
|
| 585 |
|
if ((av = newambval()) == NULL) |
| 586 |
< |
goto memerr; |
| 586 |
> |
error(SYSTEM, "out of memory in avstore"); |
| 587 |
|
copystruct(av, aval); |
| 588 |
< |
VCOPY(ck0, c0); |
| 588 |
> |
av->latick = ambclock; |
| 589 |
> |
av->next = NULL; |
| 590 |
> |
nambvals++; |
| 591 |
> |
d = bright(av->val); |
| 592 |
> |
if (d > FTINY) { /* add to log sum for averaging */ |
| 593 |
> |
avsum += log(d); |
| 594 |
> |
navsum++; |
| 595 |
> |
} |
| 596 |
> |
return(av); |
| 597 |
> |
} |
| 598 |
> |
|
| 599 |
> |
|
| 600 |
> |
#define ATALLOCSZ 512 /* #/8 trees to allocate at once */ |
| 601 |
> |
|
| 602 |
> |
static AMBTREE *atfreelist = NULL; /* free ambient tree structures */ |
| 603 |
> |
|
| 604 |
> |
|
| 605 |
> |
static AMBTREE * |
| 606 |
> |
newambtree() /* allocate 8 ambient tree structs */ |
| 607 |
> |
{ |
| 608 |
> |
register AMBTREE *atp, *upperlim; |
| 609 |
> |
|
| 610 |
> |
if (atfreelist == NULL) { /* get more nodes */ |
| 611 |
> |
atfreelist = (AMBTREE *)malloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
| 612 |
> |
if (atfreelist == NULL) |
| 613 |
> |
return(NULL); |
| 614 |
> |
/* link new free list */ |
| 615 |
> |
upperlim = atfreelist + 8*(ATALLOCSZ-1); |
| 616 |
> |
for (atp = atfreelist; atp < upperlim; atp += 8) |
| 617 |
> |
atp->kid = atp + 8; |
| 618 |
> |
atp->kid = NULL; |
| 619 |
> |
} |
| 620 |
> |
atp = atfreelist; |
| 621 |
> |
atfreelist = atp->kid; |
| 622 |
> |
bzero((char *)atp, 8*sizeof(AMBTREE)); |
| 623 |
> |
return(atp); |
| 624 |
> |
} |
| 625 |
> |
|
| 626 |
> |
|
| 627 |
> |
static void |
| 628 |
> |
freeambtree(atp) /* free 8 ambient tree structs */ |
| 629 |
> |
AMBTREE *atp; |
| 630 |
> |
{ |
| 631 |
> |
atp->kid = atfreelist; |
| 632 |
> |
atfreelist = atp; |
| 633 |
> |
} |
| 634 |
> |
|
| 635 |
> |
|
| 636 |
> |
static void |
| 637 |
> |
avinsert(av) /* insert ambient value in our tree */ |
| 638 |
> |
register AMBVAL *av; |
| 639 |
> |
{ |
| 640 |
> |
register AMBTREE *at; |
| 641 |
> |
register AMBVAL *ap; |
| 642 |
> |
AMBVAL avh; |
| 643 |
> |
FVECT ck0; |
| 644 |
> |
double s; |
| 645 |
> |
int branch; |
| 646 |
> |
register int i; |
| 647 |
> |
|
| 648 |
> |
if (av->rad <= FTINY) |
| 649 |
> |
error(CONSISTENCY, "zero ambient radius in avinsert"); |
| 650 |
> |
at = &atrunk; |
| 651 |
> |
VCOPY(ck0, thescene.cuorg); |
| 652 |
> |
s = thescene.cusize; |
| 653 |
|
while (s*(OCTSCALE/2) > av->rad*ambacc) { |
| 654 |
|
if (at->kid == NULL) |
| 655 |
|
if ((at->kid = newambtree()) == NULL) |
| 656 |
< |
goto memerr; |
| 656 |
> |
error(SYSTEM, "out of memory in avinsert"); |
| 657 |
|
s *= 0.5; |
| 658 |
|
branch = 0; |
| 659 |
|
for (i = 0; i < 3; i++) |
| 663 |
|
} |
| 664 |
|
at = at->kid + branch; |
| 665 |
|
} |
| 666 |
< |
av->next = at->alist; |
| 667 |
< |
at->alist = av; |
| 668 |
< |
return; |
| 669 |
< |
memerr: |
| 670 |
< |
error(SYSTEM, "out of memory in avinsert"); |
| 666 |
> |
avh.next = at->alist; /* order by increasing level */ |
| 667 |
> |
for (ap = &avh; ap->next != NULL; ap = ap->next) |
| 668 |
> |
if (ap->next->lvl >= av->lvl) |
| 669 |
> |
break; |
| 670 |
> |
av->next = ap->next; |
| 671 |
> |
ap->next = av; |
| 672 |
> |
at->alist = avh.next; |
| 673 |
|
} |
| 674 |
+ |
|
| 675 |
+ |
|
| 676 |
+ |
static void |
| 677 |
+ |
unloadatree(at, f) /* unload an ambient value tree */ |
| 678 |
+ |
register AMBTREE *at; |
| 679 |
+ |
void (*f)(); |
| 680 |
+ |
{ |
| 681 |
+ |
register AMBVAL *av; |
| 682 |
+ |
register int i; |
| 683 |
+ |
/* transfer values at this node */ |
| 684 |
+ |
for (av = at->alist; av != NULL; av = at->alist) { |
| 685 |
+ |
at->alist = av->next; |
| 686 |
+ |
(*f)(av); |
| 687 |
+ |
} |
| 688 |
+ |
if (at->kid == NULL) |
| 689 |
+ |
return; |
| 690 |
+ |
for (i = 0; i < 8; i++) /* transfer and free children */ |
| 691 |
+ |
unloadatree(at->kid+i, f); |
| 692 |
+ |
freeambtree(at->kid); |
| 693 |
+ |
at->kid = NULL; |
| 694 |
+ |
} |
| 695 |
+ |
|
| 696 |
+ |
|
| 697 |
+ |
static struct avl { |
| 698 |
+ |
AMBVAL *p; |
| 699 |
+ |
unsigned long t; |
| 700 |
+ |
} *avlist1; /* ambient value list with ticks */ |
| 701 |
+ |
static AMBVAL **avlist2; /* memory positions for sorting */ |
| 702 |
+ |
static int i_avlist; /* index for lists */ |
| 703 |
+ |
|
| 704 |
+ |
|
| 705 |
+ |
static int |
| 706 |
+ |
av2list(av) |
| 707 |
+ |
register AMBVAL *av; |
| 708 |
+ |
{ |
| 709 |
+ |
#ifdef DEBUG |
| 710 |
+ |
if (i_avlist >= nambvals) |
| 711 |
+ |
error(CONSISTENCY, "too many ambient values in av2list1"); |
| 712 |
+ |
#endif |
| 713 |
+ |
avlist1[i_avlist].p = avlist2[i_avlist] = av; |
| 714 |
+ |
avlist1[i_avlist++].t = av->latick; |
| 715 |
+ |
} |
| 716 |
+ |
|
| 717 |
+ |
|
| 718 |
+ |
static int |
| 719 |
+ |
alatcmp(av1, av2) /* compare ambient values for MRA */ |
| 720 |
+ |
struct avl *av1, *av2; |
| 721 |
+ |
{ |
| 722 |
+ |
register long lc = av2->t - av1->t; |
| 723 |
+ |
return(lc<0 ? -1 : lc>0 ? 1 : 0); |
| 724 |
+ |
} |
| 725 |
+ |
|
| 726 |
+ |
|
| 727 |
+ |
/* GW NOTE 2002/10/3: |
| 728 |
+ |
* I used to compare AMBVAL pointers, but found that this was the |
| 729 |
+ |
* cause of a serious consistency error with gcc, since the optimizer |
| 730 |
+ |
* uses some dangerous trick in pointer subtraction that |
| 731 |
+ |
* assumes pointers differ by exact struct size increments. |
| 732 |
+ |
*/ |
| 733 |
+ |
static int |
| 734 |
+ |
aposcmp(avp1, avp2) /* compare ambient value positions */ |
| 735 |
+ |
const void *avp1, *avp2; |
| 736 |
+ |
{ |
| 737 |
+ |
register long diff = *(char * const *)avp1 - *(char * const *)avp2; |
| 738 |
+ |
if (diff < 0) |
| 739 |
+ |
return(-1); |
| 740 |
+ |
return(diff > 0); |
| 741 |
+ |
} |
| 742 |
+ |
|
| 743 |
+ |
#if 1 |
| 744 |
+ |
static int |
| 745 |
+ |
avlmemi(avaddr) /* find list position from address */ |
| 746 |
+ |
AMBVAL *avaddr; |
| 747 |
+ |
{ |
| 748 |
+ |
register AMBVAL **avlpp; |
| 749 |
+ |
|
| 750 |
+ |
avlpp = (AMBVAL **)bsearch((char *)&avaddr, (char *)avlist2, |
| 751 |
+ |
nambvals, sizeof(AMBVAL *), aposcmp); |
| 752 |
+ |
if (avlpp == NULL) |
| 753 |
+ |
error(CONSISTENCY, "address not found in avlmemi"); |
| 754 |
+ |
return(avlpp - avlist2); |
| 755 |
+ |
} |
| 756 |
+ |
#else |
| 757 |
+ |
#define avlmemi(avaddr) ((AMBVAL **)bsearch((char *)&avaddr,(char *)avlist2, \ |
| 758 |
+ |
nambvals,sizeof(AMBVAL *),aposcmp) - avlist2) |
| 759 |
+ |
#endif |
| 760 |
+ |
|
| 761 |
+ |
|
| 762 |
+ |
static void |
| 763 |
+ |
sortambvals(always) /* resort ambient values */ |
| 764 |
+ |
int always; |
| 765 |
+ |
{ |
| 766 |
+ |
AMBTREE oldatrunk; |
| 767 |
+ |
AMBVAL tav, *tap, *pnext; |
| 768 |
+ |
register int i, j; |
| 769 |
+ |
/* see if it's time yet */ |
| 770 |
+ |
if (!always && (ambclock++ < lastsort+sortintvl || |
| 771 |
+ |
nambvals < SORT_THRESH)) |
| 772 |
+ |
return; |
| 773 |
+ |
/* |
| 774 |
+ |
* The idea here is to minimize memory thrashing |
| 775 |
+ |
* in VM systems by improving reference locality. |
| 776 |
+ |
* We do this by periodically sorting our stored ambient |
| 777 |
+ |
* values in memory in order of most recently to least |
| 778 |
+ |
* recently accessed. This ordering was chosen so that new |
| 779 |
+ |
* ambient values (which tend to be less important) go into |
| 780 |
+ |
* higher memory with the infrequently accessed values. |
| 781 |
+ |
* Since we expect our values to need sorting less |
| 782 |
+ |
* frequently as the process continues, we double our |
| 783 |
+ |
* waiting interval after each call. |
| 784 |
+ |
* This routine is also called by setambacc() with |
| 785 |
+ |
* the "always" parameter set to 1 so that the ambient |
| 786 |
+ |
* tree will be rebuilt with the new accuracy parameter. |
| 787 |
+ |
*/ |
| 788 |
+ |
if (tracktime) { /* allocate pointer arrays to sort */ |
| 789 |
+ |
avlist2 = (AMBVAL **)malloc(nambvals*sizeof(AMBVAL *)); |
| 790 |
+ |
avlist1 = (struct avl *)malloc(nambvals*sizeof(struct avl)); |
| 791 |
+ |
} else { |
| 792 |
+ |
avlist2 = NULL; |
| 793 |
+ |
avlist1 = NULL; |
| 794 |
+ |
} |
| 795 |
+ |
if (avlist1 == NULL) { /* no time tracking -- rebuild tree? */ |
| 796 |
+ |
if (avlist2 != NULL) |
| 797 |
+ |
free((void *)avlist2); |
| 798 |
+ |
if (always) { /* rebuild without sorting */ |
| 799 |
+ |
copystruct(&oldatrunk, &atrunk); |
| 800 |
+ |
atrunk.alist = NULL; |
| 801 |
+ |
atrunk.kid = NULL; |
| 802 |
+ |
unloadatree(&oldatrunk, avinsert); |
| 803 |
+ |
} |
| 804 |
+ |
} else { /* sort memory by last access time */ |
| 805 |
+ |
/* |
| 806 |
+ |
* Sorting memory is tricky because it isn't contiguous. |
| 807 |
+ |
* We have to sort an array of pointers by MRA and also |
| 808 |
+ |
* by memory position. We then copy values in "loops" |
| 809 |
+ |
* to minimize memory hits. Nevertheless, we will visit |
| 810 |
+ |
* everyone at least twice, and this is an expensive process |
| 811 |
+ |
* when we're thrashing, which is when we need to do it. |
| 812 |
+ |
*/ |
| 813 |
+ |
#ifdef DEBUG |
| 814 |
+ |
sprintf(errmsg, "sorting %u ambient values at ambclock=%lu...", |
| 815 |
+ |
nambvals, ambclock); |
| 816 |
+ |
eputs(errmsg); |
| 817 |
+ |
#endif |
| 818 |
+ |
i_avlist = 0; |
| 819 |
+ |
unloadatree(&atrunk, av2list); /* empty current tree */ |
| 820 |
+ |
#ifdef DEBUG |
| 821 |
+ |
if (i_avlist < nambvals) |
| 822 |
+ |
error(CONSISTENCY, "missing ambient values in sortambvals"); |
| 823 |
+ |
#endif |
| 824 |
+ |
qsort((char *)avlist1, nambvals, sizeof(struct avl), alatcmp); |
| 825 |
+ |
qsort((char *)avlist2, nambvals, sizeof(AMBVAL *), aposcmp); |
| 826 |
+ |
for (i = 0; i < nambvals; i++) { |
| 827 |
+ |
if (avlist1[i].p == NULL) |
| 828 |
+ |
continue; |
| 829 |
+ |
tap = avlist2[i]; |
| 830 |
+ |
copystruct(&tav, tap); |
| 831 |
+ |
for (j = i; (pnext = avlist1[j].p) != tap; |
| 832 |
+ |
j = avlmemi(pnext)) { |
| 833 |
+ |
copystruct(avlist2[j], pnext); |
| 834 |
+ |
avinsert(avlist2[j]); |
| 835 |
+ |
avlist1[j].p = NULL; |
| 836 |
+ |
} |
| 837 |
+ |
copystruct(avlist2[j], &tav); |
| 838 |
+ |
avinsert(avlist2[j]); |
| 839 |
+ |
avlist1[j].p = NULL; |
| 840 |
+ |
} |
| 841 |
+ |
free((void *)avlist1); |
| 842 |
+ |
free((void *)avlist2); |
| 843 |
+ |
/* compute new sort interval */ |
| 844 |
+ |
sortintvl = ambclock - lastsort; |
| 845 |
+ |
if (sortintvl >= MAX_SORT_INTVL/2) |
| 846 |
+ |
sortintvl = MAX_SORT_INTVL; |
| 847 |
+ |
else |
| 848 |
+ |
sortintvl <<= 1; /* wait twice as long next */ |
| 849 |
+ |
#ifdef DEBUG |
| 850 |
+ |
eputs("done\n"); |
| 851 |
+ |
#endif |
| 852 |
+ |
} |
| 853 |
+ |
if (ambclock >= MAXACLOCK) |
| 854 |
+ |
ambclock = MAXACLOCK/2; |
| 855 |
+ |
lastsort = ambclock; |
| 856 |
+ |
} |
| 857 |
+ |
|
| 858 |
+ |
|
| 859 |
+ |
#ifdef F_SETLKW |
| 860 |
+ |
|
| 861 |
+ |
static void |
| 862 |
+ |
aflock(typ) /* lock/unlock ambient file */ |
| 863 |
+ |
int typ; |
| 864 |
+ |
{ |
| 865 |
+ |
static struct flock fls; /* static so initialized to zeroes */ |
| 866 |
+ |
|
| 867 |
+ |
fls.l_type = typ; |
| 868 |
+ |
if (fcntl(fileno(ambfp), F_SETLKW, &fls) < 0) |
| 869 |
+ |
error(SYSTEM, "cannot (un)lock ambient file"); |
| 870 |
+ |
} |
| 871 |
+ |
|
| 872 |
+ |
|
| 873 |
+ |
int |
| 874 |
+ |
ambsync() /* synchronize ambient file */ |
| 875 |
+ |
{ |
| 876 |
+ |
long flen; |
| 877 |
+ |
AMBVAL avs; |
| 878 |
+ |
register int n; |
| 879 |
+ |
|
| 880 |
+ |
if (nunflshed == 0) |
| 881 |
+ |
return(0); |
| 882 |
+ |
if (lastpos < 0) /* initializing (locked in initambfile) */ |
| 883 |
+ |
goto syncend; |
| 884 |
+ |
/* gain exclusive access */ |
| 885 |
+ |
aflock(F_WRLCK); |
| 886 |
+ |
/* see if file has grown */ |
| 887 |
+ |
if ((flen = lseek(fileno(ambfp), (off_t)0L, 2)) < 0) |
| 888 |
+ |
goto seekerr; |
| 889 |
+ |
if (n = flen - lastpos) { /* file has grown */ |
| 890 |
+ |
if (ambinp == NULL) { /* use duplicate filedes */ |
| 891 |
+ |
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
| 892 |
+ |
if (ambinp == NULL) |
| 893 |
+ |
error(SYSTEM, "fdopen failed in ambsync"); |
| 894 |
+ |
} |
| 895 |
+ |
if (fseek(ambinp, lastpos, 0) < 0) |
| 896 |
+ |
goto seekerr; |
| 897 |
+ |
while (n >= AMBVALSIZ) { /* load contributed values */ |
| 898 |
+ |
if (!readambval(&avs, ambinp)) { |
| 899 |
+ |
sprintf(errmsg, |
| 900 |
+ |
"ambient file \"%s\" corrupted near character %ld", |
| 901 |
+ |
ambfile, flen - n); |
| 902 |
+ |
error(WARNING, errmsg); |
| 903 |
+ |
break; |
| 904 |
+ |
} |
| 905 |
+ |
avinsert(avstore(&avs)); |
| 906 |
+ |
n -= AMBVALSIZ; |
| 907 |
+ |
} |
| 908 |
+ |
/*** seek always as safety measure |
| 909 |
+ |
if (n) ***/ /* alignment */ |
| 910 |
+ |
if (lseek(fileno(ambfp), (off_t)(flen-n), 0) < 0) |
| 911 |
+ |
goto seekerr; |
| 912 |
+ |
} |
| 913 |
+ |
#ifdef DEBUG |
| 914 |
+ |
if (ambfp->_ptr - ambfp->_base != nunflshed*AMBVALSIZ) { |
| 915 |
+ |
sprintf(errmsg, "ambient file buffer at %d rather than %d", |
| 916 |
+ |
ambfp->_ptr - ambfp->_base, |
| 917 |
+ |
nunflshed*AMBVALSIZ); |
| 918 |
+ |
error(CONSISTENCY, errmsg); |
| 919 |
+ |
} |
| 920 |
+ |
#endif |
| 921 |
+ |
syncend: |
| 922 |
+ |
n = fflush(ambfp); /* calls write() at last */ |
| 923 |
+ |
if ((lastpos = lseek(fileno(ambfp), (off_t)0L, 1)) < 0) |
| 924 |
+ |
goto seekerr; |
| 925 |
+ |
aflock(F_UNLCK); /* release file */ |
| 926 |
+ |
nunflshed = 0; |
| 927 |
+ |
return(n); |
| 928 |
+ |
seekerr: |
| 929 |
+ |
error(SYSTEM, "seek failed in ambsync"); |
| 930 |
+ |
} |
| 931 |
+ |
|
| 932 |
+ |
#else |
| 933 |
+ |
|
| 934 |
+ |
int |
| 935 |
+ |
ambsync() /* flush ambient file */ |
| 936 |
+ |
{ |
| 937 |
+ |
if (nunflshed == 0) |
| 938 |
+ |
return(0); |
| 939 |
+ |
nunflshed = 0; |
| 940 |
+ |
return(fflush(ambfp)); |
| 941 |
+ |
} |
| 942 |
+ |
|
| 943 |
+ |
#endif |
