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greg |
2.5 |
/* Copyright (c) 1992 Regents of the University of California */ |
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greg |
1.1 |
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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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* 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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#include "standard.h" |
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#include "octree.h" |
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#include "object.h" |
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#include "otypes.h" |
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greg |
2.4 |
static double ogetflt(); |
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static long ogetint(); |
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static char *ogetstr(); |
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greg |
1.16 |
static int getobj(), octerror(); |
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greg |
1.7 |
static OCTREE getfullnode(), gettree(); |
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greg |
1.1 |
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static char *infn; /* input file name */ |
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static FILE *infp; /* input file stream */ |
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greg |
1.14 |
static int objsize; /* size of stored OBJECT's */ |
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greg |
1.1 |
static OBJECT objorig; /* zeroeth object */ |
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static short otypmap[NUMOTYPE+8]; /* object type map */ |
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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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greg |
1.12 |
extern int fputs(); |
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greg |
1.11 |
char sbuf[512]; |
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greg |
1.1 |
int nf; |
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greg |
1.8 |
OBJECT fnobjects; |
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greg |
1.1 |
register int i; |
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greg |
1.15 |
long m; |
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greg |
1.1 |
|
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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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greg |
1.12 |
if (checkheader(infp, OCTFMT, load&IO_INFO ? stdout : NULL) < 0) |
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octerror(USER, "not an octree"); |
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greg |
1.1 |
/* check format */ |
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greg |
2.4 |
if ((objsize = ogetint(2)-OCTMAGIC) <= 0 || |
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greg |
1.14 |
objsize > MAXOBJSIZ || objsize > sizeof(long)) |
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greg |
1.12 |
octerror(USER, "incompatible octree format"); |
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greg |
1.1 |
/* get boundaries */ |
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if (load & IO_BOUNDS) { |
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for (i = 0; i < 3; i++) |
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greg |
2.4 |
scene->cuorg[i] = atof(ogetstr(sbuf)); |
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scene->cusize = atof(ogetstr(sbuf)); |
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greg |
1.1 |
} else { |
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for (i = 0; i < 4; i++) |
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greg |
2.4 |
ogetstr(sbuf); |
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greg |
1.1 |
} |
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objorig = nobjects; /* set object offset */ |
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nf = 0; /* get object files */ |
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greg |
2.4 |
while (*ogetstr(sbuf)) { |
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greg |
1.1 |
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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greg |
1.8 |
/* get number of objects */ |
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greg |
2.4 |
fnobjects = m = ogetint(objsize); |
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greg |
1.15 |
if (fnobjects != m) |
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octerror(USER, "too many objects"); |
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greg |
1.1 |
|
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greg |
2.5 |
if (load & IO_TREE) /* get the octree */ |
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greg |
1.1 |
scene->cutree = gettree(); |
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greg |
2.5 |
else if (load & IO_SCENE && nf == 0) |
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skiptree(); |
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if (load & IO_SCENE) /* get the scene */ |
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if (nf == 0) { |
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for (i = 0; *ogetstr(sbuf); i++) |
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if ((otypmap[i] = otype(sbuf)) < 0) { |
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sprintf(errmsg, "unknown type \"%s\"", 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 { /* 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, "modifier in tree; octree stale?"); |
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} |
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greg |
1.1 |
fclose(infp); |
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return(nf); |
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} |
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static char * |
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greg |
2.4 |
ogetstr(s) /* get null-terminated string */ |
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greg |
1.1 |
char *s; |
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{ |
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greg |
2.4 |
extern char *getstr(); |
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greg |
1.1 |
|
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greg |
2.4 |
if (getstr(s, infp) == NULL) |
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octerror(USER, "truncated octree"); |
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return(s); |
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greg |
1.1 |
} |
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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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greg |
1.14 |
register long m; |
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greg |
1.1 |
|
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greg |
2.4 |
if ((set[0] = ogetint(objsize)) > MAXSET) |
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greg |
1.1 |
octerror(USER, "bad set in getfullnode"); |
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greg |
1.14 |
for (i = 1; i <= set[0]; i++) { |
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greg |
2.4 |
m = ogetint(objsize) + objorig; |
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greg |
1.15 |
if ((set[i] = m) != m) |
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greg |
1.14 |
octerror(USER, "too many objects"); |
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} |
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greg |
1.1 |
return(fullnode(set)); |
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} |
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static long |
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greg |
2.4 |
ogetint(siz) /* get a siz-byte integer */ |
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int siz; |
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greg |
1.1 |
{ |
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greg |
2.4 |
extern long getint(); |
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greg |
1.3 |
register long r; |
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greg |
1.1 |
|
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greg |
2.4 |
r = getint(siz, infp); |
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if (feof(infp)) |
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octerror(USER, "truncated octree"); |
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greg |
1.1 |
return(r); |
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} |
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161 |
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static double |
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greg |
2.4 |
ogetflt() /* get a floating point number */ |
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greg |
1.1 |
{ |
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greg |
2.4 |
extern double getflt(); |
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double r; |
167 |
greg |
1.1 |
|
168 |
greg |
2.4 |
r = getflt(infp); |
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if (feof(infp)) |
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octerror(USER, "truncated octree"); |
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return(r); |
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greg |
1.1 |
} |
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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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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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greg |
2.5 |
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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200 |
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static |
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skiptree() /* skip octree on input */ |
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{ |
203 |
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register int i; |
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switch (getc(infp)) { |
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case OT_EMPTY: |
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return; |
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case OT_FULL: |
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for (i = ogetint(objsize); i-- > 0; ) |
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ogetint(objsize); |
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return; |
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case OT_TREE: |
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for (i = 0; i < 8; i++) |
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skiptree(); |
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return; |
216 |
greg |
1.1 |
case EOF: |
217 |
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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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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; |
229 |
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register int i; |
230 |
greg |
1.14 |
register long m; |
231 |
greg |
1.1 |
register OBJREC *objp; |
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233 |
greg |
2.4 |
i = ogetint(1); |
234 |
greg |
1.3 |
if (i == -1) |
235 |
greg |
1.1 |
return(OVOID); /* terminator */ |
236 |
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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); |
239 |
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if ((objp->otype = otypmap[i]) < 0) |
240 |
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octerror(USER, "reference to unknown type"); |
241 |
greg |
2.4 |
if ((m = ogetint(objsize)) != OVOID) { |
242 |
greg |
1.14 |
m += objorig; |
243 |
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if ((OBJECT)m != m) |
244 |
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octerror(USER, "too many objects"); |
245 |
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} |
246 |
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objp->omod = m; |
247 |
greg |
2.4 |
objp->oname = savqstr(ogetstr(sbuf)); |
248 |
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if (objp->oargs.nsargs = ogetint(2)) { |
249 |
greg |
1.1 |
objp->oargs.sarg = (char **)bmalloc |
250 |
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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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greg |
2.4 |
objp->oargs.sarg[i] = savestr(ogetstr(sbuf)); |
255 |
greg |
1.1 |
} else |
256 |
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objp->oargs.sarg = NULL; |
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#ifdef IARGS |
258 |
greg |
2.4 |
if (objp->oargs.niargs = ogetint(2)) { |
259 |
greg |
1.1 |
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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greg |
2.4 |
objp->oargs.iarg[i] = ogetint(4); |
265 |
greg |
1.1 |
} else |
266 |
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objp->oargs.iarg = NULL; |
267 |
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#endif |
268 |
greg |
2.4 |
if (objp->oargs.nfargs = ogetint(2)) { |
269 |
greg |
1.15 |
objp->oargs.farg = (FLOAT *)bmalloc |
270 |
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(objp->oargs.nfargs*sizeof(FLOAT)); |
271 |
greg |
1.1 |
if (objp->oargs.farg == NULL) |
272 |
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goto memerr; |
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for (i = 0; i < objp->oargs.nfargs; i++) |
274 |
greg |
2.4 |
objp->oargs.farg[i] = ogetflt(); |
275 |
greg |
1.1 |
} else |
276 |
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objp->oargs.farg = NULL; |
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/* initialize */ |
278 |
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objp->os = NULL; |
279 |
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objp->lastrno = -1; |
280 |
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/* insert */ |
281 |
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insertobject(obj); |
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return(obj); |
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memerr: |
284 |
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error(SYSTEM, "out of memory in getobj"); |
285 |
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} |
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287 |
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288 |
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static |
289 |
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octerror(etyp, msg) /* octree error */ |
290 |
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int etyp; |
291 |
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char *msg; |
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{ |
293 |
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char msgbuf[128]; |
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295 |
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sprintf(msgbuf, "(%s): %s", infn, msg); |
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error(etyp, msgbuf); |
297 |
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} |