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/* Copyright (c) 1995 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"; |
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static const char RCSid[] = "$Id$"; |
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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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* Declarations of external symbols in ambient.h |
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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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|
17 |
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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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|
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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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#ifndef AMBVWT |
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#define AMBVWT 250 /* relative ambient value weight (# calcs) */ |
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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 */ |
31 |
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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 2047 /* 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 int nunflshed = 0; /* number of unflushed ambient values */ |
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|
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#ifndef SORT_THRESH |
41 |
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#ifdef BIGMEM |
50 |
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#define SORT_THRESH ((9L<<20)/sizeof(AMBVAL)) |
51 |
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#else |
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#ifdef SMLMEM |
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#define SORT_THRESH ((3L<<20)/sizeof(AMBVAL)) |
43 |
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#else |
44 |
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#define SORT_THRESH ((9L<<20)/sizeof(AMBVAL)) |
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#endif |
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#endif |
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#ifndef SORT_INTVL |
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#define SORT_INTVL (SORT_THRESH*256) |
48 |
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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<<4) |
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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 COLOR avsum = BLKCOLOR; /* computed ambient value sum */ |
55 |
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static unsigned int nambvals = 0; /* number of computed ambient values */ |
54 |
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static double avsum = 0.; /* computed ambient value sum (log) */ |
55 |
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static unsigned int navsum = 0; /* number of values in avsum */ |
56 |
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static unsigned int nambvals = 0; /* total number of indirect values */ |
57 |
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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 */ |
59 |
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static unsigned long lastsort = 0; /* time of last value sort */ |
60 |
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static long sortintvl = SORT_INTVL; /* time until next sort */ |
61 |
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static FILE *ambinp = NULL; /* auxiliary file for input */ |
62 |
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static long lastpos = -1; /* last flush position */ |
63 |
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|
64 |
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#define MAXACLOCK (1L<<30) /* clock turnover value */ |
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/* |
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* Track access times unless we are sharing ambient values |
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* through memory on a multiprocessor, when we want to avoid |
68 |
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* claiming our own memory (copy on write). |
68 |
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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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#define tracktime (shm_boundary == NULL || ambfp == NULL) |
72 |
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#ifndef tracktime |
73 |
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#define tracktime (shm_boundary == NULL || nambvals > 3*nambshare) |
74 |
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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 newambval() (AMBVAL *)malloc(sizeof(AMBVAL)) |
79 |
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#define freeav(av) free((void *)av); |
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|
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extern long ftell(), lseek(); |
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static int initambfile(), avsave(), avinsert(), sortambvals(); |
83 |
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static AMBVAL *avstore(); |
81 |
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static void initambfile(int creat); |
82 |
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static void avsave(AMBVAL *av); |
83 |
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static AMBVAL *avstore(AMBVAL *aval); |
84 |
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static AMBTREE *newambtree(void); |
85 |
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static void freeambtree(AMBTREE *atp); |
86 |
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|
87 |
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typedef void unloadtf_t(void *); |
88 |
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static unloadtf_t avinsert; |
89 |
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static unloadtf_t av2list; |
90 |
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static void unloadatree(AMBTREE *at, unloadtf_t *f); |
91 |
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|
92 |
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static int aposcmp(const void *avp1, const void *avp2); |
93 |
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static int avlmemi(AMBVAL *avaddr); |
94 |
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static void sortambvals(int always); |
95 |
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|
96 |
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#ifdef F_SETLKW |
97 |
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static aflock(); |
97 |
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static void aflock(int typ); |
98 |
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#endif |
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|
100 |
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|
101 |
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setambres(ar) /* set ambient resolution */ |
102 |
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int ar; |
101 |
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extern void |
102 |
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setambres( /* set ambient resolution */ |
103 |
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int ar |
104 |
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) |
105 |
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{ |
106 |
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ambres = ar < 0 ? 0 : ar; /* may be done already */ |
107 |
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/* set min & max radii */ |
121 |
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} |
122 |
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|
123 |
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|
124 |
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setambacc(newa) /* set ambient accuracy */ |
125 |
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double newa; |
124 |
> |
extern void |
125 |
> |
setambacc( /* set ambient accuracy */ |
126 |
> |
double newa |
127 |
> |
) |
128 |
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{ |
129 |
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double ambdiff; |
130 |
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|
136 |
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} |
137 |
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|
138 |
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|
139 |
< |
setambient(afile) /* initialize calculation */ |
140 |
< |
char *afile; |
139 |
> |
extern void |
140 |
> |
setambient(void) /* initialize calculation */ |
141 |
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{ |
142 |
< |
long headlen; |
142 |
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int readonly = 0; |
143 |
> |
long pos, flen; |
144 |
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AMBVAL amb; |
145 |
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/* make sure we're fresh */ |
146 |
+ |
ambdone(); |
147 |
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/* init ambient limits */ |
148 |
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setambres(ambres); |
149 |
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setambacc(ambacc); |
150 |
< |
if (afile == NULL) |
150 |
> |
if (ambfile == NULL || !ambfile[0]) |
151 |
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return; |
152 |
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if (ambacc <= FTINY) { |
153 |
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sprintf(errmsg, "zero ambient accuracy so \"%s\" not opened", |
154 |
< |
afile); |
154 |
> |
ambfile); |
155 |
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error(WARNING, errmsg); |
156 |
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return; |
157 |
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} |
158 |
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/* open ambient file */ |
159 |
< |
if ((ambfp = fopen(afile, "r+")) != NULL) { |
160 |
< |
initambfile(0); |
161 |
< |
headlen = ftell(ambfp); |
159 |
> |
if ((ambfp = fopen(ambfile, "r+")) == NULL) |
160 |
> |
readonly = (ambfp = fopen(ambfile, "r")) != NULL; |
161 |
> |
if (ambfp != NULL) { |
162 |
> |
initambfile(0); /* file exists */ |
163 |
> |
pos = ftell(ambfp); |
164 |
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while (readambval(&amb, ambfp)) |
165 |
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avinsert(avstore(&amb)); |
166 |
< |
/* align */ |
167 |
< |
fseek(ambfp, -((ftell(ambfp)-headlen)%AMBVALSIZ), 1); |
168 |
< |
} else if ((ambfp = fopen(afile, "w+")) != NULL) |
169 |
< |
initambfile(1); |
170 |
< |
else { |
171 |
< |
sprintf(errmsg, "cannot open ambient file \"%s\"", afile); |
166 |
> |
nambshare = nambvals; /* share loaded values */ |
167 |
> |
if (readonly) { |
168 |
> |
sprintf(errmsg, |
169 |
> |
"loaded %u values from read-only ambient file", |
170 |
> |
nambvals); |
171 |
> |
error(WARNING, errmsg); |
172 |
> |
fclose(ambfp); /* close file so no writes */ |
173 |
> |
ambfp = NULL; |
174 |
> |
return; /* avoid ambsync() */ |
175 |
> |
} |
176 |
> |
/* align file pointer */ |
177 |
> |
pos += (long)nambvals*AMBVALSIZ; |
178 |
> |
flen = lseek(fileno(ambfp), (off_t)0, SEEK_END); |
179 |
> |
if (flen != pos) { |
180 |
> |
sprintf(errmsg, |
181 |
> |
"ignoring last %ld values in ambient file (corrupted)", |
182 |
> |
(flen - pos)/AMBVALSIZ); |
183 |
> |
error(WARNING, errmsg); |
184 |
> |
fseek(ambfp, pos, 0); |
185 |
> |
#ifndef _WIN32 /* XXX we need a replacement for that one */ |
186 |
> |
ftruncate(fileno(ambfp), (off_t)pos); |
187 |
> |
#endif |
188 |
> |
} |
189 |
> |
} else if ((ambfp = fopen(ambfile, "w+")) != NULL) { |
190 |
> |
initambfile(1); /* else create new file */ |
191 |
> |
} else { |
192 |
> |
sprintf(errmsg, "cannot open ambient file \"%s\"", ambfile); |
193 |
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error(SYSTEM, errmsg); |
194 |
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} |
195 |
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nunflshed++; /* lie */ |
197 |
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} |
198 |
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|
199 |
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|
200 |
< |
ambnotify(obj) /* record new modifier */ |
201 |
< |
OBJECT obj; |
200 |
> |
extern void |
201 |
> |
ambdone(void) /* close ambient file and free memory */ |
202 |
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{ |
203 |
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if (ambfp != NULL) { /* close ambient file */ |
204 |
+ |
ambsync(); |
205 |
+ |
fclose(ambfp); |
206 |
+ |
ambfp = NULL; |
207 |
+ |
if (ambinp != NULL) { |
208 |
+ |
fclose(ambinp); |
209 |
+ |
ambinp = NULL; |
210 |
+ |
} |
211 |
+ |
lastpos = -1; |
212 |
+ |
} |
213 |
+ |
/* free ambient tree */ |
214 |
+ |
unloadatree(&atrunk, free); |
215 |
+ |
/* reset state variables */ |
216 |
+ |
avsum = 0.; |
217 |
+ |
navsum = 0; |
218 |
+ |
nambvals = 0; |
219 |
+ |
nambshare = 0; |
220 |
+ |
ambclock = 0; |
221 |
+ |
lastsort = 0; |
222 |
+ |
sortintvl = SORT_INTVL; |
223 |
+ |
} |
224 |
+ |
|
225 |
+ |
|
226 |
+ |
extern void |
227 |
+ |
ambnotify( /* record new modifier */ |
228 |
+ |
OBJECT obj |
229 |
+ |
) |
230 |
+ |
{ |
231 |
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static int hitlimit = 0; |
232 |
< |
register OBJREC *o = objptr(obj); |
232 |
> |
register OBJREC *o; |
233 |
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register char **amblp; |
234 |
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|
235 |
+ |
if (obj == OVOID) { /* starting over */ |
236 |
+ |
ambset[0] = 0; |
237 |
+ |
hitlimit = 0; |
238 |
+ |
return; |
239 |
+ |
} |
240 |
+ |
o = objptr(obj); |
241 |
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if (hitlimit || !ismodifier(o->otype)) |
242 |
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return; |
243 |
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for (amblp = amblist; *amblp != NULL; amblp++) |
253 |
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} |
254 |
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|
255 |
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|
256 |
< |
ambient(acol, r) /* compute ambient component for ray */ |
257 |
< |
COLOR acol; |
258 |
< |
register RAY *r; |
256 |
> |
extern void |
257 |
> |
multambient( /* compute ambient component & multiply by coef. */ |
258 |
> |
COLOR aval, |
259 |
> |
register RAY *r, |
260 |
> |
FVECT nrm |
261 |
> |
) |
262 |
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{ |
263 |
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static int rdepth = 0; /* ambient recursion */ |
264 |
< |
double d; |
264 |
> |
COLOR acol; |
265 |
> |
double d, l; |
266 |
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|
267 |
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if (ambdiv <= 0) /* no ambient calculation */ |
268 |
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goto dumbamb; |
276 |
|
|
277 |
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if (ambacc <= FTINY) { /* no ambient storage */ |
278 |
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rdepth++; |
279 |
< |
d = doambient(acol, r, r->rweight, NULL, NULL); |
279 |
> |
d = doambient(acol, r, aval, intens(aval)*r->rweight, |
280 |
> |
NULL, NULL); |
281 |
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rdepth--; |
282 |
|
if (d <= FTINY) |
283 |
|
goto dumbamb; |
284 |
+ |
multcolor(aval, acol); |
285 |
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return; |
286 |
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} |
287 |
< |
/* resort memory? */ |
288 |
< |
sortambvals(0); |
287 |
> |
|
288 |
> |
if (tracktime) /* sort to minimize thrashing */ |
289 |
> |
sortambvals(0); |
290 |
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/* get ambient value */ |
291 |
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setcolor(acol, 0.0, 0.0, 0.0); |
292 |
< |
d = sumambient(acol, r, rdepth, |
292 |
> |
d = sumambient(acol, r, intens(aval)*r->rweight, nrm, rdepth, |
293 |
|
&atrunk, thescene.cuorg, thescene.cusize); |
294 |
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if (d > FTINY) { |
295 |
|
scalecolor(acol, 1.0/d); |
296 |
+ |
multcolor(aval, acol); |
297 |
|
return; |
298 |
|
} |
299 |
|
rdepth++; /* need to cache new value */ |
300 |
< |
d = makeambient(acol, r, rdepth-1); |
300 |
> |
d = makeambient(acol, r, aval, nrm, rdepth-1); |
301 |
|
rdepth--; |
302 |
< |
if (d > FTINY) |
302 |
> |
if (d > FTINY) { |
303 |
> |
multcolor(aval, acol); /* got new value */ |
304 |
|
return; |
305 |
+ |
} |
306 |
|
dumbamb: /* return global value */ |
307 |
< |
copycolor(acol, ambval); |
308 |
< |
#if AMBVWT |
222 |
< |
if (nambvals == 0) |
307 |
> |
if ((ambvwt <= 0) | (navsum == 0)) { |
308 |
> |
multcolor(aval, ambval); |
309 |
|
return; |
310 |
< |
scalecolor(acol, (double)AMBVWT); |
311 |
< |
addcolor(acol, avsum); /* average in computations */ |
312 |
< |
d = 1.0/(AMBVWT+nambvals); |
313 |
< |
scalecolor(acol, d); |
314 |
< |
#endif |
310 |
> |
} |
311 |
> |
l = bright(ambval); /* average in computations */ |
312 |
> |
if (l > FTINY) { |
313 |
> |
d = (log(l)*(double)ambvwt + avsum) / |
314 |
> |
(double)(ambvwt + navsum); |
315 |
> |
d = exp(d) / l; |
316 |
> |
scalecolor(aval, d); |
317 |
> |
multcolor(aval, ambval); /* apply color of ambval */ |
318 |
> |
} else { |
319 |
> |
d = exp( avsum / (double)navsum ); |
320 |
> |
scalecolor(aval, d); /* neutral color */ |
321 |
> |
} |
322 |
|
} |
323 |
|
|
324 |
|
|
325 |
< |
double |
326 |
< |
sumambient(acol, r, al, at, c0, s) /* get interpolated ambient value */ |
327 |
< |
COLOR acol; |
328 |
< |
register RAY *r; |
329 |
< |
int al; |
330 |
< |
AMBTREE *at; |
331 |
< |
FVECT c0; |
332 |
< |
double s; |
325 |
> |
extern double |
326 |
> |
sumambient( /* get interpolated ambient value */ |
327 |
> |
COLOR acol, |
328 |
> |
register RAY *r, |
329 |
> |
double rw, |
330 |
> |
FVECT rn, |
331 |
> |
int al, |
332 |
> |
AMBTREE *at, |
333 |
> |
FVECT c0, |
334 |
> |
double s |
335 |
> |
) |
336 |
|
{ |
337 |
|
double d, e1, e2, wt, wsum; |
338 |
|
COLOR ct; |
344 |
|
wsum = 0.0; |
345 |
|
/* do this node */ |
346 |
|
for (av = at->alist; av != NULL; av = av->next) { |
347 |
+ |
double rn_dot = -2.0; |
348 |
|
if (tracktime) |
349 |
< |
av->latick = ambclock++; |
349 |
> |
av->latick = ambclock; |
350 |
|
/* |
351 |
|
* Ambient level test. |
352 |
|
*/ |
353 |
|
if (av->lvl > al) /* list sorted, so this works */ |
354 |
|
break; |
355 |
< |
if (av->weight < r->rweight-FTINY) |
355 |
> |
if (av->weight < 0.9*rw) |
356 |
|
continue; |
357 |
|
/* |
358 |
|
* Ambient radius test. |
367 |
|
if (e1 > ambacc*ambacc*1.21) |
368 |
|
continue; |
369 |
|
/* |
370 |
< |
* Normal direction test. |
370 |
> |
* Direction test using closest normal. |
371 |
|
*/ |
372 |
< |
e2 = (1.0 - DOT(av->dir, r->ron)) * r->rweight; |
372 |
> |
d = DOT(av->dir, r->ron); |
373 |
> |
if (rn != r->ron) { |
374 |
> |
rn_dot = DOT(av->dir, rn); |
375 |
> |
if (rn_dot > 1.0-FTINY) |
376 |
> |
rn_dot = 1.0-FTINY; |
377 |
> |
if (rn_dot >= d-FTINY) { |
378 |
> |
d = rn_dot; |
379 |
> |
rn_dot = -2.0; |
380 |
> |
} |
381 |
> |
} |
382 |
> |
e2 = (1.0 - d) * r->rweight; |
383 |
|
if (e2 < 0.0) e2 = 0.0; |
384 |
|
if (e1 + e2 > ambacc*ambacc*1.21) |
385 |
|
continue; |
395 |
|
/* |
396 |
|
* Jittering final test reduces image artifacts. |
397 |
|
*/ |
398 |
< |
wt = sqrt(e1) + sqrt(e2); |
398 |
> |
e1 = sqrt(e1); |
399 |
> |
e2 = sqrt(e2); |
400 |
> |
wt = e1 + e2; |
401 |
|
if (wt > ambacc*(.9+.2*urand(9015+samplendx))) |
402 |
|
continue; |
403 |
+ |
/* |
404 |
+ |
* Recompute directional error using perturbed normal |
405 |
+ |
*/ |
406 |
+ |
if (rn_dot > 0.0) { |
407 |
+ |
e2 = sqrt((1.0 - rn_dot)*r->rweight); |
408 |
+ |
wt = e1 + e2; |
409 |
+ |
} |
410 |
|
if (wt <= 1e-3) |
411 |
|
wt = 1e3; |
412 |
|
else |
413 |
|
wt = 1.0 / wt; |
414 |
|
wsum += wt; |
415 |
< |
extambient(ct, av, r->rop, r->ron); |
415 |
> |
extambient(ct, av, r->rop, rn); |
416 |
|
scalecolor(ct, wt); |
417 |
|
addcolor(acol, ct); |
418 |
|
} |
431 |
|
break; |
432 |
|
} |
433 |
|
if (j == 3) |
434 |
< |
wsum += sumambient(acol, r, al, at->kid+i, ck0, s); |
434 |
> |
wsum += sumambient(acol, r, rw, rn, al, |
435 |
> |
at->kid+i, ck0, s); |
436 |
|
} |
437 |
|
return(wsum); |
438 |
|
} |
439 |
|
|
440 |
|
|
441 |
< |
double |
442 |
< |
makeambient(acol, r, al) /* make a new ambient value */ |
443 |
< |
COLOR acol; |
444 |
< |
register RAY *r; |
445 |
< |
int al; |
441 |
> |
extern double |
442 |
> |
makeambient( /* make a new ambient value */ |
443 |
> |
COLOR acol, |
444 |
> |
RAY *r, |
445 |
> |
COLOR ac, |
446 |
> |
FVECT rn, |
447 |
> |
int al |
448 |
> |
) |
449 |
|
{ |
450 |
|
AMBVAL amb; |
451 |
+ |
double coef; |
452 |
|
FVECT gp, gd; |
453 |
|
/* compute weight */ |
454 |
|
amb.weight = pow(AVGREFL, (double)al); |
455 |
< |
if (r->rweight < 0.1*amb.weight) /* heuristic */ |
456 |
< |
amb.weight = r->rweight; |
455 |
> |
coef = intens(ac)*r->rweight; |
456 |
> |
if (coef < 0.1*amb.weight) /* heuristic */ |
457 |
> |
amb.weight = coef; |
458 |
|
/* compute ambient */ |
459 |
< |
amb.rad = doambient(acol, r, amb.weight, gp, gd); |
459 |
> |
amb.rad = doambient(acol, r, ac, amb.weight, gp, gd); |
460 |
|
if (amb.rad <= FTINY) |
461 |
|
return(0.0); |
462 |
|
/* store it */ |
468 |
|
VCOPY(amb.gdir, gd); |
469 |
|
/* insert into tree */ |
470 |
|
avsave(&amb); /* and save to file */ |
471 |
+ |
if (rn != r->ron) |
472 |
+ |
extambient(acol, &amb, r->rop, rn); /* texture */ |
473 |
|
return(amb.rad); |
474 |
|
} |
475 |
|
|
476 |
|
|
477 |
< |
extambient(cr, ap, pv, nv) /* extrapolate value at pv, nv */ |
478 |
< |
COLOR cr; |
479 |
< |
register AMBVAL *ap; |
480 |
< |
FVECT pv, nv; |
477 |
> |
extern void |
478 |
> |
extambient( /* extrapolate value at pv, nv */ |
479 |
> |
COLOR cr, |
480 |
> |
register AMBVAL *ap, |
481 |
> |
FVECT pv, |
482 |
> |
FVECT nv |
483 |
> |
) |
484 |
|
{ |
485 |
< |
FVECT v1, v2; |
485 |
> |
FVECT v1; |
486 |
|
register int i; |
487 |
|
double d; |
488 |
|
|
491 |
|
for (i = 0; i < 3; i++) |
492 |
|
d += ap->gpos[i]*(pv[i]-ap->pos[i]); |
493 |
|
/* gradient due to rotation */ |
494 |
< |
VCOPY(v1, ap->dir); |
495 |
< |
fcross(v2, v1, nv); |
369 |
< |
d += DOT(ap->gdir, v2); |
494 |
> |
VCROSS(v1, ap->dir, nv); |
495 |
> |
d += DOT(ap->gdir, v1); |
496 |
|
if (d <= 0.0) { |
497 |
|
setcolor(cr, 0.0, 0.0, 0.0); |
498 |
|
return; |
502 |
|
} |
503 |
|
|
504 |
|
|
505 |
< |
static |
506 |
< |
initambfile(creat) /* initialize ambient file */ |
507 |
< |
int creat; |
505 |
> |
static void |
506 |
> |
initambfile( /* initialize ambient file */ |
507 |
> |
int creat |
508 |
> |
) |
509 |
|
{ |
510 |
< |
extern char *progname, *octname, VersionID[]; |
510 |
> |
extern char *progname, *octname; |
511 |
> |
static char *mybuf = NULL; |
512 |
|
|
513 |
|
#ifdef F_SETLKW |
514 |
|
aflock(creat ? F_WRLCK : F_RDLCK); |
515 |
|
#endif |
516 |
< |
#ifdef MSDOS |
517 |
< |
setmode(fileno(ambfp), O_BINARY); |
518 |
< |
#endif |
519 |
< |
setbuf(ambfp, bmalloc(BUFSIZ+8)); |
516 |
> |
SET_FILE_BINARY(ambfp); |
517 |
> |
if (mybuf == NULL) |
518 |
> |
mybuf = (char *)bmalloc(BUFSIZ+8); |
519 |
> |
setbuf(ambfp, mybuf); |
520 |
|
if (creat) { /* new file */ |
521 |
|
newheader("RADIANCE", ambfp); |
522 |
< |
fprintf(ambfp, "%s -av %g %g %g -ab %d -aa %g ", |
522 |
> |
fprintf(ambfp, "%s -av %g %g %g -aw %d -ab %d -aa %g ", |
523 |
|
progname, colval(ambval,RED), |
524 |
|
colval(ambval,GRN), colval(ambval,BLU), |
525 |
< |
ambounce, ambacc); |
526 |
< |
fprintf(ambfp, "-ad %d -as %d -ar %d %s\n", |
527 |
< |
ambdiv, ambssamp, ambres, |
528 |
< |
octname==NULL ? "" : octname); |
525 |
> |
ambvwt, ambounce, ambacc); |
526 |
> |
fprintf(ambfp, "-ad %d -as %d -ar %d ", |
527 |
> |
ambdiv, ambssamp, ambres); |
528 |
> |
if (octname != NULL) |
529 |
> |
printargs(1, &octname, ambfp); |
530 |
> |
else |
531 |
> |
fputc('\n', ambfp); |
532 |
|
fprintf(ambfp, "SOFTWARE= %s\n", VersionID); |
533 |
+ |
fputnow(ambfp); |
534 |
|
fputformat(AMBFMT, ambfp); |
535 |
|
putc('\n', ambfp); |
536 |
|
putambmagic(ambfp); |
539 |
|
} |
540 |
|
|
541 |
|
|
542 |
< |
static |
543 |
< |
avsave(av) /* insert and save an ambient value */ |
544 |
< |
AMBVAL *av; |
542 |
> |
static void |
543 |
> |
avsave( /* insert and save an ambient value */ |
544 |
> |
AMBVAL *av |
545 |
> |
) |
546 |
|
{ |
547 |
|
avinsert(avstore(av)); |
548 |
|
if (ambfp == NULL) |
554 |
|
goto writerr; |
555 |
|
return; |
556 |
|
writerr: |
557 |
< |
error(SYSTEM, "error writing ambient file"); |
557 |
> |
error(SYSTEM, "error writing to ambient file"); |
558 |
|
} |
559 |
|
|
560 |
|
|
561 |
|
static AMBVAL * |
562 |
< |
avstore(aval) /* allocate memory and store aval */ |
563 |
< |
register AMBVAL *aval; |
562 |
> |
avstore( /* allocate memory and store aval */ |
563 |
> |
register AMBVAL *aval |
564 |
> |
) |
565 |
|
{ |
566 |
|
register AMBVAL *av; |
567 |
+ |
double d; |
568 |
|
|
569 |
|
if ((av = newambval()) == NULL) |
570 |
|
error(SYSTEM, "out of memory in avstore"); |
571 |
< |
copystruct(av, aval); |
571 |
> |
*av = *aval; |
572 |
|
av->latick = ambclock; |
573 |
|
av->next = NULL; |
439 |
– |
addcolor(avsum, av->val); /* add to sum for averaging */ |
574 |
|
nambvals++; |
575 |
+ |
d = bright(av->val); |
576 |
+ |
if (d > FTINY) { /* add to log sum for averaging */ |
577 |
+ |
avsum += log(d); |
578 |
+ |
navsum++; |
579 |
+ |
} |
580 |
|
return(av); |
581 |
|
} |
582 |
|
|
586 |
|
static AMBTREE *atfreelist = NULL; /* free ambient tree structures */ |
587 |
|
|
588 |
|
|
589 |
< |
static |
590 |
< |
AMBTREE * |
452 |
< |
newambtree() /* allocate 8 ambient tree structs */ |
589 |
> |
static AMBTREE * |
590 |
> |
newambtree(void) /* allocate 8 ambient tree structs */ |
591 |
|
{ |
592 |
|
register AMBTREE *atp, *upperlim; |
593 |
|
|
594 |
|
if (atfreelist == NULL) { /* get more nodes */ |
595 |
< |
atfreelist = (AMBTREE *)bmalloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
595 |
> |
atfreelist = (AMBTREE *)malloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
596 |
|
if (atfreelist == NULL) |
597 |
|
return(NULL); |
598 |
|
/* link new free list */ |
603 |
|
} |
604 |
|
atp = atfreelist; |
605 |
|
atfreelist = atp->kid; |
606 |
< |
bzero((char *)atp, 8*sizeof(AMBTREE)); |
606 |
> |
memset((char *)atp, '\0', 8*sizeof(AMBTREE)); |
607 |
|
return(atp); |
608 |
|
} |
609 |
|
|
610 |
|
|
611 |
< |
static |
612 |
< |
freeambtree(atp) /* free 8 ambient tree structs */ |
613 |
< |
AMBTREE *atp; |
611 |
> |
static void |
612 |
> |
freeambtree( /* free 8 ambient tree structs */ |
613 |
> |
AMBTREE *atp |
614 |
> |
) |
615 |
|
{ |
616 |
|
atp->kid = atfreelist; |
617 |
|
atfreelist = atp; |
618 |
|
} |
619 |
|
|
620 |
|
|
621 |
< |
static |
622 |
< |
avinsert(av) /* insert ambient value in our tree */ |
623 |
< |
register AMBVAL *av; |
621 |
> |
static void |
622 |
> |
avinsert( /* insert ambient value in our tree */ |
623 |
> |
void *av |
624 |
> |
) |
625 |
|
{ |
626 |
|
register AMBTREE *at; |
627 |
|
register AMBVAL *ap; |
631 |
|
int branch; |
632 |
|
register int i; |
633 |
|
|
634 |
< |
if (av->rad <= FTINY) |
634 |
> |
if (((AMBVAL*)av)->rad <= FTINY) |
635 |
|
error(CONSISTENCY, "zero ambient radius in avinsert"); |
636 |
|
at = &atrunk; |
637 |
|
VCOPY(ck0, thescene.cuorg); |
638 |
|
s = thescene.cusize; |
639 |
< |
while (s*(OCTSCALE/2) > av->rad*ambacc) { |
639 |
> |
while (s*(OCTSCALE/2) > ((AMBVAL*)av)->rad*ambacc) { |
640 |
|
if (at->kid == NULL) |
641 |
|
if ((at->kid = newambtree()) == NULL) |
642 |
|
error(SYSTEM, "out of memory in avinsert"); |
643 |
|
s *= 0.5; |
644 |
|
branch = 0; |
645 |
|
for (i = 0; i < 3; i++) |
646 |
< |
if (av->pos[i] > ck0[i] + s) { |
646 |
> |
if (((AMBVAL*)av)->pos[i] > ck0[i] + s) { |
647 |
|
ck0[i] += s; |
648 |
|
branch |= 1 << i; |
649 |
|
} |
651 |
|
} |
652 |
|
avh.next = at->alist; /* order by increasing level */ |
653 |
|
for (ap = &avh; ap->next != NULL; ap = ap->next) |
654 |
< |
if (ap->next->lvl >= av->lvl) |
654 |
> |
if (ap->next->lvl >= ((AMBVAL*)av)->lvl) |
655 |
|
break; |
656 |
< |
av->next = ap->next; |
657 |
< |
ap->next = av; |
656 |
> |
((AMBVAL*)av)->next = ap->next; |
657 |
> |
ap->next = (AMBVAL*)av; |
658 |
|
at->alist = avh.next; |
659 |
|
} |
660 |
|
|
661 |
|
|
662 |
< |
static |
663 |
< |
unloadatree(at, f) /* unload an ambient value tree */ |
664 |
< |
register AMBTREE *at; |
665 |
< |
int (*f)(); |
662 |
> |
static void |
663 |
> |
unloadatree( /* unload an ambient value tree */ |
664 |
> |
register AMBTREE *at, |
665 |
> |
unloadtf_t *f |
666 |
> |
) |
667 |
|
{ |
668 |
|
register AMBVAL *av; |
669 |
|
register int i; |
681 |
|
} |
682 |
|
|
683 |
|
|
684 |
< |
static AMBVAL **avlist1, **avlist2; /* ambient value lists for sorting */ |
684 |
> |
static struct avl { |
685 |
> |
AMBVAL *p; |
686 |
> |
unsigned long t; |
687 |
> |
} *avlist1; /* ambient value list with ticks */ |
688 |
> |
static AMBVAL **avlist2; /* memory positions for sorting */ |
689 |
|
static int i_avlist; /* index for lists */ |
690 |
|
|
691 |
+ |
static int alatcmp(const void *av1, const void *av2); |
692 |
|
|
693 |
< |
static |
694 |
< |
av2list(av) |
695 |
< |
AMBVAL *av; |
693 |
> |
static void |
694 |
> |
av2list( |
695 |
> |
void *av |
696 |
> |
) |
697 |
|
{ |
698 |
|
#ifdef DEBUG |
699 |
|
if (i_avlist >= nambvals) |
700 |
|
error(CONSISTENCY, "too many ambient values in av2list1"); |
701 |
|
#endif |
702 |
< |
avlist1[i_avlist] = avlist2[i_avlist] = av; |
703 |
< |
i_avlist++; |
702 |
> |
avlist1[i_avlist].p = avlist2[i_avlist] = (AMBVAL*)av; |
703 |
> |
avlist1[i_avlist++].t = ((AMBVAL*)av)->latick; |
704 |
|
} |
705 |
|
|
706 |
|
|
707 |
|
static int |
708 |
< |
alatcmp(avp1, avp2) /* compare ambient values for MRA */ |
709 |
< |
AMBVAL **avp1, **avp2; |
708 |
> |
alatcmp( /* compare ambient values for MRA */ |
709 |
> |
const void *av1, |
710 |
> |
const void *av2 |
711 |
> |
) |
712 |
|
{ |
713 |
< |
return((**avp2).latick - (**avp1).latick); |
713 |
> |
register long lc = ((struct avl *)av2)->t - ((struct avl *)av1)->t; |
714 |
> |
return(lc<0 ? -1 : lc>0 ? 1 : 0); |
715 |
|
} |
716 |
|
|
717 |
|
|
718 |
+ |
/* GW NOTE 2002/10/3: |
719 |
+ |
* I used to compare AMBVAL pointers, but found that this was the |
720 |
+ |
* cause of a serious consistency error with gcc, since the optimizer |
721 |
+ |
* uses some dangerous trick in pointer subtraction that |
722 |
+ |
* assumes pointers differ by exact struct size increments. |
723 |
+ |
*/ |
724 |
|
static int |
725 |
< |
aposcmp(avp1, avp2) /* compare ambient value positions */ |
726 |
< |
AMBVAL **avp1, **avp2; |
725 |
> |
aposcmp( /* compare ambient value positions */ |
726 |
> |
const void *avp1, |
727 |
> |
const void *avp2 |
728 |
> |
) |
729 |
|
{ |
730 |
< |
return(*avp1 - *avp2); |
730 |
> |
register long diff = *(char * const *)avp1 - *(char * const *)avp2; |
731 |
> |
if (diff < 0) |
732 |
> |
return(-1); |
733 |
> |
return(diff > 0); |
734 |
|
} |
735 |
|
|
736 |
< |
|
576 |
< |
#ifdef DEBUG |
736 |
> |
#if 1 |
737 |
|
static int |
738 |
< |
avlmemi(avaddr) /* find list position from address */ |
739 |
< |
AMBVAL *avaddr; |
738 |
> |
avlmemi( /* find list position from address */ |
739 |
> |
AMBVAL *avaddr |
740 |
> |
) |
741 |
|
{ |
742 |
|
register AMBVAL **avlpp; |
743 |
|
|
753 |
|
#endif |
754 |
|
|
755 |
|
|
756 |
< |
static |
757 |
< |
sortambvals(always) /* resort ambient values */ |
758 |
< |
int always; |
756 |
> |
static void |
757 |
> |
sortambvals( /* resort ambient values */ |
758 |
> |
int always |
759 |
> |
) |
760 |
|
{ |
761 |
|
AMBTREE oldatrunk; |
762 |
|
AMBVAL tav, *tap, *pnext; |
763 |
|
register int i, j; |
764 |
|
/* see if it's time yet */ |
765 |
< |
if (!always && (ambclock < lastsort+sortintvl || |
765 |
> |
if (!always && (ambclock++ < lastsort+sortintvl || |
766 |
|
nambvals < SORT_THRESH)) |
767 |
|
return; |
768 |
|
/* |
781 |
|
* tree will be rebuilt with the new accuracy parameter. |
782 |
|
*/ |
783 |
|
if (tracktime) { /* allocate pointer arrays to sort */ |
622 |
– |
avlist1 = (AMBVAL **)malloc(nambvals*sizeof(AMBVAL *)); |
784 |
|
avlist2 = (AMBVAL **)malloc(nambvals*sizeof(AMBVAL *)); |
785 |
< |
} else |
786 |
< |
avlist1 = avlist2 = NULL; |
787 |
< |
if (avlist2 == NULL) { /* no time tracking -- rebuild tree? */ |
788 |
< |
if (avlist1 != NULL) |
789 |
< |
free((char *)avlist1); |
785 |
> |
avlist1 = (struct avl *)malloc(nambvals*sizeof(struct avl)); |
786 |
> |
} else { |
787 |
> |
avlist2 = NULL; |
788 |
> |
avlist1 = NULL; |
789 |
> |
} |
790 |
> |
if (avlist1 == NULL) { /* no time tracking -- rebuild tree? */ |
791 |
> |
if (avlist2 != NULL) |
792 |
> |
free((void *)avlist2); |
793 |
|
if (always) { /* rebuild without sorting */ |
794 |
< |
copystruct(&oldatrunk, &atrunk); |
794 |
> |
oldatrunk = atrunk; |
795 |
|
atrunk.alist = NULL; |
796 |
|
atrunk.kid = NULL; |
797 |
|
unloadatree(&oldatrunk, avinsert); |
816 |
|
if (i_avlist < nambvals) |
817 |
|
error(CONSISTENCY, "missing ambient values in sortambvals"); |
818 |
|
#endif |
819 |
< |
qsort((char *)avlist1, nambvals, sizeof(AMBVAL *), alatcmp); |
819 |
> |
qsort((char *)avlist1, nambvals, sizeof(struct avl), alatcmp); |
820 |
|
qsort((char *)avlist2, nambvals, sizeof(AMBVAL *), aposcmp); |
821 |
|
for (i = 0; i < nambvals; i++) { |
822 |
< |
if (avlist1[i] == NULL) |
822 |
> |
if (avlist1[i].p == NULL) |
823 |
|
continue; |
824 |
|
tap = avlist2[i]; |
825 |
< |
copystruct(&tav, tap); |
826 |
< |
for (j = i; (pnext = avlist1[j]) != tap; |
825 |
> |
tav = *tap; |
826 |
> |
for (j = i; (pnext = avlist1[j].p) != tap; |
827 |
|
j = avlmemi(pnext)) { |
828 |
< |
copystruct(avlist2[j], pnext); |
828 |
> |
*(avlist2[j]) = *pnext; |
829 |
|
avinsert(avlist2[j]); |
830 |
< |
avlist1[j] = NULL; |
830 |
> |
avlist1[j].p = NULL; |
831 |
|
} |
832 |
< |
copystruct(avlist2[j], &tav); |
832 |
> |
*(avlist2[j]) = tav; |
833 |
|
avinsert(avlist2[j]); |
834 |
< |
avlist1[j] = NULL; |
834 |
> |
avlist1[j].p = NULL; |
835 |
|
} |
836 |
< |
free((char *)avlist1); |
837 |
< |
free((char *)avlist2); |
836 |
> |
free((void *)avlist1); |
837 |
> |
free((void *)avlist2); |
838 |
|
/* compute new sort interval */ |
839 |
|
sortintvl = ambclock - lastsort; |
840 |
|
if (sortintvl >= MAX_SORT_INTVL/2) |
853 |
|
|
854 |
|
#ifdef F_SETLKW |
855 |
|
|
856 |
< |
static |
857 |
< |
aflock(typ) /* lock/unlock ambient file */ |
858 |
< |
int typ; |
856 |
> |
static void |
857 |
> |
aflock( /* lock/unlock ambient file */ |
858 |
> |
int typ |
859 |
> |
) |
860 |
|
{ |
861 |
|
static struct flock fls; /* static so initialized to zeroes */ |
862 |
|
|
866 |
|
} |
867 |
|
|
868 |
|
|
869 |
< |
int |
870 |
< |
ambsync() /* synchronize ambient file */ |
869 |
> |
extern int |
870 |
> |
ambsync(void) /* synchronize ambient file */ |
871 |
|
{ |
707 |
– |
static FILE *ambinp = NULL; |
708 |
– |
static long lastpos = -1; |
872 |
|
long flen; |
873 |
|
AMBVAL avs; |
874 |
|
register int n; |
880 |
|
/* gain exclusive access */ |
881 |
|
aflock(F_WRLCK); |
882 |
|
/* see if file has grown */ |
883 |
< |
if ((flen = lseek(fileno(ambfp), 0L, 2)) < 0) |
883 |
> |
if ((flen = lseek(fileno(ambfp), (off_t)0, SEEK_END)) < 0) |
884 |
|
goto seekerr; |
885 |
< |
if (n = flen - lastpos) { /* file has grown */ |
885 |
> |
if ( (n = flen - lastpos) ) { /* file has grown */ |
886 |
|
if (ambinp == NULL) { /* use duplicate filedes */ |
887 |
|
ambinp = fdopen(dup(fileno(ambfp)), "r"); |
888 |
|
if (ambinp == NULL) |
891 |
|
if (fseek(ambinp, lastpos, 0) < 0) |
892 |
|
goto seekerr; |
893 |
|
while (n >= AMBVALSIZ) { /* load contributed values */ |
894 |
< |
readambval(&avs, ambinp); |
894 |
> |
if (!readambval(&avs, ambinp)) { |
895 |
> |
sprintf(errmsg, |
896 |
> |
"ambient file \"%s\" corrupted near character %ld", |
897 |
> |
ambfile, flen - n); |
898 |
> |
error(WARNING, errmsg); |
899 |
> |
break; |
900 |
> |
} |
901 |
|
avinsert(avstore(&avs)); |
902 |
|
n -= AMBVALSIZ; |
903 |
|
} |
904 |
|
/*** seek always as safety measure |
905 |
|
if (n) ***/ /* alignment */ |
906 |
< |
if (lseek(fileno(ambfp), flen-n, 0) < 0) |
906 |
> |
if (lseek(fileno(ambfp), (off_t)(flen-n), SEEK_SET) < 0) |
907 |
|
goto seekerr; |
908 |
|
} |
909 |
|
#ifdef DEBUG |
916 |
|
#endif |
917 |
|
syncend: |
918 |
|
n = fflush(ambfp); /* calls write() at last */ |
919 |
< |
if ((lastpos = lseek(fileno(ambfp), 0L, 1)) < 0) |
919 |
> |
if ((lastpos = lseek(fileno(ambfp), (off_t)0, SEEK_CUR)) < 0) |
920 |
|
goto seekerr; |
921 |
|
aflock(F_UNLCK); /* release file */ |
922 |
|
nunflshed = 0; |
923 |
|
return(n); |
924 |
|
seekerr: |
925 |
|
error(SYSTEM, "seek failed in ambsync"); |
926 |
+ |
return -1; /* pro forma return */ |
927 |
|
} |
928 |
|
|
929 |
|
#else |
930 |
|
|
931 |
< |
int |
932 |
< |
ambsync() /* flush ambient file */ |
931 |
> |
extern int |
932 |
> |
ambsync(void) /* flush ambient file */ |
933 |
|
{ |
934 |
|
if (nunflshed == 0) |
935 |
|
return(0); |