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/* Copyright (c) 1991 Regents of the University of California */ |
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/* Copyright (c) 1992 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#include "random.h" |
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#define OCTSCALE 0.5 /* ceil((valid rad.)/(cube size)) */ |
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#define OCTSCALE 0.5 /* ceil((valid rad.)/(cube size)) */ |
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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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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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extern CUBE thescene; /* contains space boundaries */ |
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#define MAXASET 511 /* maximum number of elements in ambient set */ |
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OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
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#define MAXASET 511 /* maximum number of elements in ambient set */ |
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OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
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double maxarad; /* maximum ambient radius */ |
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double minarad; /* minimum ambient radius */ |
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double maxarad; /* maximum ambient radius */ |
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double minarad; /* minimum ambient radius */ |
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static AMBTREE atrunk; /* our ambient trunk node */ |
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static AMBTREE atrunk; /* our ambient trunk node */ |
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static FILE *ambfp = NULL; /* ambient file pointer */ |
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#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
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#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
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#define newambval() (AMBVAL *)bmalloc(sizeof(AMBVAL)) |
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#define newambval() (AMBVAL *)bmalloc(sizeof(AMBVAL)) |
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#define newambtree() (AMBTREE *)calloc(8, sizeof(AMBTREE)) |
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#define newambtree() (AMBTREE *)calloc(8, sizeof(AMBTREE)) |
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extern long ftell(), lseek(); |
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static int initambfile(), avsave(), avinsert(), ambsync(); |
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char *afile; |
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{ |
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long headlen; |
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AMBVAL amb; |
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AMBVAL amb; |
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/* init ambient limits */ |
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setambres(ambres); |
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/* open ambient file */ |
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ambnotify(obj) /* record new modifier */ |
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OBJECT obj; |
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OBJECT obj; |
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{ |
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static int hitlimit = 0; |
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register OBJREC *o = objptr(obj); |
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register OBJREC *o = objptr(obj); |
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register char **amblp; |
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if (hitlimit || !ismodifier(o->otype)) |
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register RAY *r; |
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{ |
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static int rdepth = 0; /* ambient recursion */ |
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double d; |
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double d; |
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if (ambdiv <= 0) /* no ambient calculation */ |
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goto dumbamb; |
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COLOR acol; |
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register RAY *r; |
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int al; |
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AMBTREE *at; |
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AMBTREE *at; |
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FVECT c0; |
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double s; |
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double s; |
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{ |
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extern double sqrt(); |
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double d, e1, e2, wt, wsum; |
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double d, e1, e2, wt, wsum; |
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COLOR ct; |
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FVECT ck0; |
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int i; |
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register int j; |
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register AMBVAL *av; |
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register AMBVAL *av; |
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/* do this node */ |
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wsum = 0.0; |
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for (av = at->alist; av != NULL; av = av->next) { |
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register RAY *r; |
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int al; |
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{ |
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AMBVAL amb; |
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AMBVAL amb; |
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FVECT gp, gd; |
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/* compute weight */ |
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amb.weight = pow(AVGREFL, (double)al); |
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extambient(cr, ap, pv, nv) /* extrapolate value at pv, nv */ |
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COLOR cr; |
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register AMBVAL *ap; |
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register AMBVAL *ap; |
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FVECT pv, nv; |
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{ |
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FVECT v1, v2; |
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register int i; |
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double d; |
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double d; |
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d = 1.0; /* zeroeth order */ |
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/* gradient due to translation */ |
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{ |
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extern char *progname, *octname, VersionID[]; |
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#ifdef MSDOS |
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setmode(fileno(ambfp), O_BINARY); |
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#endif |
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setbuf(ambfp, bmalloc(BUFSIZ)); |
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if (creat) { /* new file */ |
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fprintf(ambfp, "%s -av %g %g %g -ab %d -aa %g ", |
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putc('\n', ambfp); |
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putambmagic(ambfp); |
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fflush(ambfp); |
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#ifndef NIX |
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#ifndef NIX |
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sync(); /* protect against NFS buffering */ |
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#endif |
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} else if (checkheader(ambfp, AMBFMT, NULL) < 0 || !hasambmagic(ambfp)) |
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static |
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avsave(av) /* insert and save an ambient value */ |
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AMBVAL *av; |
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AMBVAL *av; |
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{ |
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static int nunflshed = 0; |
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static |
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avinsert(aval, at, c0, s) /* insert ambient value in a tree */ |
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AMBVAL *aval; |
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AMBVAL *aval; |
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register AMBTREE *at; |
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FVECT c0; |
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double s; |
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double s; |
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{ |
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FVECT ck0; |
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int branch; |
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register AMBVAL *av; |
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register AMBVAL *av; |
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register int i; |
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if ((av = newambval()) == NULL) |
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} |
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#ifdef NIX |
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#ifdef NIX |
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static |
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ambsync() /* flush ambient file */ |
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static FILE *ambinp = NULL; |
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struct flock fls; |
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struct stat sts; |
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AMBVAL avs; |
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AMBVAL avs; |
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long lastpos, flen; |
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register int n; |
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/* gain exclusive access */ |