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greg |
2.4 |
/* 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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* oconv.c - main program for object to octree conversion. |
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* |
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* 7/29/85 |
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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 |
#include "paths.h" |
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greg |
1.14 |
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greg |
2.4 |
#define OMARGIN (10*FTINY) /* margin around global cube */ |
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greg |
1.2 |
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greg |
2.4 |
#define MAXOBJFIL 63 /* maximum number of scene files */ |
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greg |
1.1 |
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char *progname; /* argv[0] */ |
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char *libpath; /* library search path */ |
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int nowarn = 0; /* supress warnings? */ |
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int objlim = 5; /* # of objects before split */ |
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int resolu = 1024; /* octree resolution limit */ |
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CUBE thescene = {EMPTY, {0.0, 0.0, 0.0}, 0.0}; /* our scene */ |
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char *ofname[MAXOBJFIL+1]; /* object file names */ |
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int nfiles = 0; /* number of object files */ |
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greg |
2.4 |
double mincusize; /* minimum cube size from resolu */ |
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greg |
1.1 |
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greg |
1.7 |
int (*addobjnotify[])() = {NULL}; /* new object notifier functions */ |
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greg |
1.1 |
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main(argc, argv) /* convert object files to an octree */ |
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int argc; |
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char **argv; |
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{ |
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greg |
2.2 |
extern char *getenv(); |
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greg |
1.1 |
FVECT bbmin, bbmax; |
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char *infile = NULL; |
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greg |
2.6 |
int inpfrozen = 0; |
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greg |
1.1 |
int outflags = IO_ALL; |
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greg |
2.4 |
OBJECT startobj; |
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greg |
1.1 |
int i; |
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greg |
2.5 |
progname = argv[0] = fixargv0(argv[0]); |
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greg |
2.4 |
if ((libpath = getenv(ULIBVAR)) == NULL) |
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greg |
1.14 |
libpath = DEFPATH; |
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greg |
1.1 |
|
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1.12 |
initotypes(); |
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greg |
1.5 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
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greg |
1.1 |
switch (argv[i][1]) { |
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1.5 |
case '\0': /* scene from stdin */ |
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2.6 |
outflags &= ~IO_FILES; |
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greg |
1.5 |
goto breakopt; |
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greg |
1.1 |
case 'i': /* input octree */ |
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infile = argv[++i]; |
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break; |
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case 'b': /* bounding cube */ |
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greg |
1.2 |
thescene.cuorg[0] = atof(argv[++i]) - OMARGIN; |
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thescene.cuorg[1] = atof(argv[++i]) - OMARGIN; |
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thescene.cuorg[2] = atof(argv[++i]) - OMARGIN; |
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thescene.cusize = atof(argv[++i]) + 2*OMARGIN; |
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greg |
1.1 |
break; |
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case 'n': /* set limit */ |
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objlim = atoi(argv[++i]); |
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break; |
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case 'r': /* resolution limit */ |
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resolu = atoi(argv[++i]); |
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break; |
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case 'f': /* freeze octree */ |
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outflags &= ~IO_FILES; |
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break; |
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case 'w': /* supress warnings */ |
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nowarn = 1; |
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break; |
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default: |
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sprintf(errmsg, "unknown option: '%s'", argv[i]); |
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error(USER, errmsg); |
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break; |
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} |
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1.5 |
breakopt: |
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greg |
2.4 |
#ifdef MSDOS |
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setmode(fileno(stdout), O_BINARY); |
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#endif |
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greg |
1.1 |
if (infile != NULL) { /* get old octree & objects */ |
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if (thescene.cusize > FTINY) |
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error(USER, "only one of '-b' or '-i'"); |
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nfiles = readoct(infile, IO_ALL, &thescene, ofname); |
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2.6 |
if (nfiles == 0) |
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inpfrozen++; |
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1.1 |
} |
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printargs(argc, argv, stdout); /* info. header */ |
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1.13 |
fputformat(OCTFMT, stdout); |
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1.1 |
printf("\n"); |
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startobj = nobjects; /* previous objects already converted */ |
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2.5 |
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1.4 |
for ( ; i < argc; i++) /* read new scene descriptions */ |
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if (!strcmp(argv[i], "-")) { /* from stdin */ |
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readobj(NULL); |
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outflags &= ~IO_FILES; |
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} else { /* from file */ |
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if (nfiles >= MAXOBJFIL) |
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error(INTERNAL, "too many scene files"); |
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readobj(ofname[nfiles++] = argv[i]); |
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} |
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greg |
1.1 |
ofname[nfiles] = NULL; |
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greg |
2.6 |
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if (inpfrozen && outflags & IO_FILES) { |
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error(WARNING, "frozen octree"); |
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outflags &= ~IO_FILES; |
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} |
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greg |
1.1 |
/* find bounding box */ |
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bbmin[0] = bbmin[1] = bbmin[2] = FHUGE; |
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bbmax[0] = bbmax[1] = bbmax[2] = -FHUGE; |
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for (i = startobj; i < nobjects; i++) |
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add2bbox(objptr(i), bbmin, bbmax); |
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/* set/check cube */ |
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if (thescene.cusize == 0.0) { |
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if (bbmin[0] <= bbmax[0]) { |
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for (i = 0; i < 3; i++) { |
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1.2 |
bbmin[i] -= OMARGIN; |
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bbmax[i] += OMARGIN; |
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greg |
1.1 |
} |
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for (i = 0; i < 3; i++) |
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if (bbmax[i] - bbmin[i] > thescene.cusize) |
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thescene.cusize = bbmax[i] - bbmin[i]; |
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1.3 |
for (i = 0; i < 3; i++) |
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thescene.cuorg[i] = |
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(bbmax[i]+bbmin[i]-thescene.cusize)*.5; |
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greg |
1.1 |
} |
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} else { |
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for (i = 0; i < 3; i++) |
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if (bbmin[i] < thescene.cuorg[i] || |
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bbmax[i] > thescene.cuorg[i] + thescene.cusize) |
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error(USER, "boundary does not encompass scene"); |
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} |
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mincusize = thescene.cusize / resolu - FTINY; |
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greg |
2.5 |
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greg |
1.1 |
for (i = startobj; i < nobjects; i++) /* add new objects */ |
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addobject(&thescene, i); |
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greg |
2.5 |
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greg |
1.1 |
thescene.cutree = combine(thescene.cutree); /* optimize */ |
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writeoct(outflags, &thescene, ofname); /* write structures to stdout */ |
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quit(0); |
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} |
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quit(code) /* exit program */ |
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int code; |
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{ |
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exit(code); |
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} |
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cputs() /* interactive error */ |
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{ |
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/* referenced, but not used */ |
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} |
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wputs(s) /* warning message */ |
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char *s; |
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{ |
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if (!nowarn) |
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eputs(s); |
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} |
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eputs(s) /* put string to stderr */ |
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register char *s; |
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{ |
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greg |
1.9 |
static int inln = 0; |
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greg |
1.1 |
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greg |
1.9 |
if (!inln++) { |
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greg |
1.1 |
fputs(progname, stderr); |
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fputs(": ", stderr); |
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} |
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fputs(s, stderr); |
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if (*s && s[strlen(s)-1] == '\n') |
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greg |
1.9 |
inln = 0; |
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greg |
1.1 |
} |
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greg |
2.4 |
#define bitop(f,i,op) (f[((i)>>3)] op (1<<((i)&7))) |
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#define tstbit(f,i) bitop(f,i,&) |
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#define setbit(f,i) bitop(f,i,|=) |
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#define clrbit(f,i) bitop(f,i,&=~) |
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#define tglbit(f,i) bitop(f,i,^=) |
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greg |
1.11 |
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greg |
1.1 |
addobject(cu, obj) /* add an object to a cube */ |
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register CUBE *cu; |
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greg |
2.4 |
OBJECT obj; |
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greg |
1.1 |
{ |
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CUBE cukid; |
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greg |
2.4 |
OCTREE ot; |
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OBJECT oset[MAXSET+1]; |
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greg |
2.3 |
unsigned char inflg[(MAXSET+7)/8], volflg[(MAXSET+7)/8]; |
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greg |
1.11 |
int in; |
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greg |
1.1 |
register int i, j; |
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in = (*ofun[objptr(obj)->otype].funp)(objptr(obj), cu); |
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greg |
1.6 |
if (in == O_MISS) |
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greg |
1.1 |
return; /* no intersection */ |
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greg |
2.5 |
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greg |
1.1 |
if (istree(cu->cutree)) { |
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/* do children */ |
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cukid.cusize = cu->cusize * 0.5; |
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for (i = 0; i < 8; i++) { |
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cukid.cutree = octkid(cu->cutree, i); |
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for (j = 0; j < 3; j++) { |
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cukid.cuorg[j] = cu->cuorg[j]; |
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if ((1<<j) & i) |
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cukid.cuorg[j] += cukid.cusize; |
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} |
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addobject(&cukid, obj); |
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octkid(cu->cutree, i) = cukid.cutree; |
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} |
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greg |
1.11 |
return; |
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} |
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if (isempty(cu->cutree)) { |
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greg |
1.1 |
/* singular set */ |
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oset[0] = 1; oset[1] = obj; |
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cu->cutree = fullnode(oset); |
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greg |
1.11 |
return; |
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} |
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/* add to full node */ |
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objset(oset, cu->cutree); |
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cukid.cusize = cu->cusize * 0.5; |
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greg |
2.5 |
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greg |
1.11 |
if (in==O_IN || oset[0] < objlim || cukid.cusize < mincusize) { |
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/* add to set */ |
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if (oset[0] >= MAXSET) { |
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greg |
2.3 |
sprintf(errmsg, "set overflow in addobject (%s)", |
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greg |
1.11 |
objptr(obj)->oname); |
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error(INTERNAL, errmsg); |
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greg |
1.1 |
} |
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greg |
1.11 |
insertelem(oset, obj); |
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cu->cutree = fullnode(oset); |
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return; |
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greg |
1.1 |
} |
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greg |
1.11 |
/* subdivide cube */ |
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if ((ot = octalloc()) == EMPTY) |
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error(SYSTEM, "out of octree space"); |
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/* mark volumes */ |
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j = (oset[0]+7)>>3; |
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while (j--) |
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volflg[j] = inflg[j] = 0; |
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for (j = 1; j <= oset[0]; j++) |
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if (isvolume(objptr(oset[j])->otype)) { |
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setbit(volflg,j-1); |
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if ((*ofun[objptr(oset[j])->otype].funp) |
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greg |
2.3 |
(objptr(oset[j]), cu) == O_IN) |
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greg |
1.11 |
setbit(inflg,j-1); |
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} |
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/* assign subcubes */ |
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for (i = 0; i < 8; i++) { |
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cukid.cutree = EMPTY; |
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for (j = 0; j < 3; j++) { |
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cukid.cuorg[j] = cu->cuorg[j]; |
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if ((1<<j) & i) |
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cukid.cuorg[j] += cukid.cusize; |
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} |
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/* surfaces first */ |
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for (j = 1; j <= oset[0]; j++) |
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if (!tstbit(volflg,j-1)) |
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addobject(&cukid, oset[j]); |
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/* then this object */ |
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addobject(&cukid, obj); |
293 |
greg |
2.3 |
/* then partial volumes */ |
294 |
greg |
1.11 |
for (j = 1; j <= oset[0]; j++) |
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if (tstbit(volflg,j-1) && |
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!tstbit(inflg,j-1)) |
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addobject(&cukid, oset[j]); |
298 |
greg |
2.3 |
/* full volumes last */ |
299 |
greg |
1.11 |
for (j = 1; j <= oset[0]; j++) |
300 |
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if (tstbit(inflg,j-1)) |
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addobject(&cukid, oset[j]); |
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/* returned node */ |
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octkid(ot, i) = cukid.cutree; |
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} |
305 |
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cu->cutree = ot; |
306 |
greg |
1.1 |
} |