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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"; |
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#endif |
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|
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/* |
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* readoct.c - routines to read octree information. |
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* |
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* 7/30/85 |
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*/ |
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|
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#include "standard.h" |
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|
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#include "octree.h" |
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|
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#include "object.h" |
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|
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#include "otypes.h" |
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|
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extern double atof(); |
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static double getflt(); |
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static long getint(); |
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static char *getstr(); |
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static int getobj(), octerror(); |
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static OCTREE getfullnode(), gettree(); |
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|
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static char *infn; /* input file name */ |
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static FILE *infp; /* input file stream */ |
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static int objsize; /* size of stored OBJECT's */ |
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static OBJECT objorig; /* zeroeth object */ |
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static short otypmap[NUMOTYPE+8]; /* object type map */ |
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|
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|
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int |
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readoct(fname, load, scene, ofn) /* read in octree from file */ |
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char *fname; |
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int load; |
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CUBE *scene; |
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char *ofn[]; |
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{ |
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extern int fputs(); |
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char sbuf[512]; |
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int nf; |
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OBJECT fnobjects; |
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register int i; |
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long m; |
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|
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if (fname == NULL) { |
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infn = "standard input"; |
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infp = stdin; |
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} else { |
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infn = fname; |
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if ((infp = fopen(fname, "r")) == NULL) { |
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sprintf(errmsg, "cannot open octree file \"%s\"", |
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fname); |
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error(SYSTEM, errmsg); |
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} |
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} |
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/* get header */ |
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if (checkheader(infp, OCTFMT, load&IO_INFO ? stdout : NULL) < 0) |
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octerror(USER, "not an octree"); |
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/* check format */ |
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if ((objsize = getint(2)-OCTMAGIC) <= 0 || |
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objsize > MAXOBJSIZ || objsize > sizeof(long)) |
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octerror(USER, "incompatible octree format"); |
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/* get boundaries */ |
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if (load & IO_BOUNDS) { |
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for (i = 0; i < 3; i++) |
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scene->cuorg[i] = atof(getstr(sbuf)); |
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scene->cusize = atof(getstr(sbuf)); |
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} else { |
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for (i = 0; i < 4; i++) |
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getstr(sbuf); |
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} |
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objorig = nobjects; /* set object offset */ |
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nf = 0; /* get object files */ |
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while (*getstr(sbuf)) { |
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if (load & IO_SCENE) |
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readobj(sbuf); |
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if (load & IO_FILES) |
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ofn[nf] = savqstr(sbuf); |
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nf++; |
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} |
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if (load & IO_FILES) |
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ofn[nf] = NULL; |
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/* get number of objects */ |
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fnobjects = m = getint(objsize); |
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if (fnobjects != m) |
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octerror(USER, "too many objects"); |
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|
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if (load & IO_TREE) { |
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/* get the octree */ |
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scene->cutree = gettree(); |
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/* get the scene */ |
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if (nf == 0 && load & IO_SCENE) { |
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for (i = 0; *getstr(sbuf); i++) |
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if ((otypmap[i] = otype(sbuf)) < 0) { |
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sprintf(errmsg, "unknown type \"%s\"", |
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sbuf); |
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octerror(WARNING, errmsg); |
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} |
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while (getobj() != OVOID) |
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; |
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} else if (load & IO_SCENE) { /* consistency checks */ |
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/* check object count */ |
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if (nobjects != objorig+fnobjects) |
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octerror(USER, "bad object count; octree stale?"); |
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/* check for non-surfaces */ |
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if (nonsurfinset(objorig, fnobjects)) |
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octerror(USER, "non-surface in set; octree stale?"); |
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} |
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} |
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fclose(infp); |
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return(nf); |
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} |
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|
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|
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static char * |
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getstr(s) /* get null-terminated string */ |
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char *s; |
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{ |
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register char *cp; |
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register int c; |
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|
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cp = s; |
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while ((c = getc(infp)) != EOF) |
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if ((*cp++ = c) == '\0') |
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return(s); |
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|
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octerror(USER, "truncated octree"); |
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} |
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|
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|
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static OCTREE |
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getfullnode() /* get a set, return fullnode */ |
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{ |
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OBJECT set[MAXSET+1]; |
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register int i; |
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register long m; |
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|
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if ((set[0] = getint(objsize)) > MAXSET) |
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octerror(USER, "bad set in getfullnode"); |
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for (i = 1; i <= set[0]; i++) { |
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m = getint(objsize) + objorig; |
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if ((set[i] = m) != m) |
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octerror(USER, "too many objects"); |
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} |
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return(fullnode(set)); |
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} |
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|
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|
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static long |
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getint(siz) /* get a siz-byte integer */ |
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register int siz; |
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{ |
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register int c; |
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register long r; |
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|
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if ((c = getc(infp)) == EOF) |
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goto end_file; |
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r = 0x80&c ? -1<<8|c : c; /* sign extend */ |
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while (--siz > 0) { |
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if ((c = getc(infp)) == EOF) |
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goto end_file; |
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r <<= 8; |
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r |= c; |
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} |
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return(r); |
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end_file: |
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octerror(USER, "truncated octree"); |
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} |
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|
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|
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static double |
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getflt() /* get a floating point number */ |
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{ |
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extern double ldexp(); |
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double d; |
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|
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d = (double)getint(4)/0x7fffffff; |
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return(ldexp(d, (int)getint(1))); |
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} |
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|
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|
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static OCTREE |
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gettree() /* get a pre-ordered octree */ |
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{ |
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register OCTREE ot; |
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register int i; |
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|
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switch (getc(infp)) { |
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case OT_EMPTY: |
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return(EMPTY); |
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case OT_FULL: |
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return(getfullnode()); |
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case OT_TREE: |
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if ((ot = octalloc()) == EMPTY) |
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octerror(SYSTEM, "out of tree space in gettree"); |
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for (i = 0; i < 8; i++) |
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octkid(ot, i) = gettree(); |
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return(ot); |
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case EOF: |
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octerror(USER, "truncated octree"); |
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default: |
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octerror(USER, "damaged octree"); |
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} |
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} |
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|
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|
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static |
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getobj() /* get next object */ |
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{ |
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char sbuf[MAXSTR]; |
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int obj; |
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register int i; |
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register long m; |
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register OBJREC *objp; |
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|
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i = getint(1); |
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if (i == -1) |
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return(OVOID); /* terminator */ |
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if ((obj = newobject()) == OVOID) |
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error(SYSTEM, "out of object space"); |
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objp = objptr(obj); |
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if ((objp->otype = otypmap[i]) < 0) |
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octerror(USER, "reference to unknown type"); |
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if ((m = getint(objsize)) != OVOID) { |
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m += objorig; |
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if ((OBJECT)m != m) |
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octerror(USER, "too many objects"); |
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} |
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objp->omod = m; |
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objp->oname = savqstr(getstr(sbuf)); |
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if (objp->oargs.nsargs = getint(2)) { |
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objp->oargs.sarg = (char **)bmalloc |
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(objp->oargs.nsargs*sizeof(char *)); |
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if (objp->oargs.sarg == NULL) |
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goto memerr; |
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for (i = 0; i < objp->oargs.nsargs; i++) |
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objp->oargs.sarg[i] = savestr(getstr(sbuf)); |
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} else |
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objp->oargs.sarg = NULL; |
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#ifdef IARGS |
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if (objp->oargs.niargs = getint(2)) { |
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objp->oargs.iarg = (long *)bmalloc |
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(objp->oargs.niargs*sizeof(long)); |
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if (objp->oargs.iarg == NULL) |
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goto memerr; |
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for (i = 0; i < objp->oargs.niargs; i++) |
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objp->oargs.iarg[i] = getint(4); |
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} else |
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objp->oargs.iarg = NULL; |
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#endif |
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if (objp->oargs.nfargs = getint(2)) { |
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objp->oargs.farg = (FLOAT *)bmalloc |
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(objp->oargs.nfargs*sizeof(FLOAT)); |
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if (objp->oargs.farg == NULL) |
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goto memerr; |
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for (i = 0; i < objp->oargs.nfargs; i++) |
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objp->oargs.farg[i] = getflt(); |
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} else |
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objp->oargs.farg = NULL; |
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/* initialize */ |
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objp->os = NULL; |
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objp->lastrno = -1; |
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/* insert */ |
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insertobject(obj); |
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return(obj); |
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memerr: |
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error(SYSTEM, "out of memory in getobj"); |
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} |
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|
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|
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static |
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octerror(etyp, msg) /* octree error */ |
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int etyp; |
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char *msg; |
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{ |
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char msgbuf[128]; |
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|
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sprintf(msgbuf, "(%s): %s", infn, msg); |
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error(etyp, msgbuf); |
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} |
