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/* Copyright (c) 1986 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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* 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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|
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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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#define OMARGIN (10*FTINY) /* margin around global cube */ |
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|
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#define MAXOBJFIL 63 /* maximum number of scene files */ |
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|
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char *progname; /* argv[0] */ |
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|
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char *libpath; /* library search path */ |
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|
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int nowarn = 0; /* supress warnings? */ |
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|
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int objlim = 5; /* # of objects before split */ |
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|
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int resolu = 1024; /* octree resolution limit */ |
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|
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CUBE thescene = {EMPTY, {0.0, 0.0, 0.0}, 0.0}; /* our scene */ |
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|
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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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|
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double mincusize; /* minimum cube size from resolu */ |
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|
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int (*addobjnotify[])() = {NULL}; /* new object notifier functions */ |
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|
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|
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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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char *getenv(); |
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double atof(); |
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FVECT bbmin, bbmax; |
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char *infile = NULL; |
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int outflags = IO_ALL; |
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OBJECT startobj; |
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int i; |
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|
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progname = argv[0]; |
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|
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if ((libpath = getenv("RAYPATH")) == NULL) |
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libpath = ":/usr/local/lib/ray"; |
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|
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
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switch (argv[i][1]) { |
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case '\0': /* scene from stdin */ |
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goto breakopt; |
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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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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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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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breakopt: |
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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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if (nfiles == 0 && 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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} |
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|
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printargs(argc, argv, stdout); /* info. header */ |
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printf("\n"); |
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|
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startobj = nobjects; /* previous objects already converted */ |
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|
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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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|
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ofname[nfiles] = NULL; |
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/* 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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bbmin[i] -= OMARGIN; |
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bbmax[i] += OMARGIN; |
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} |
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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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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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} |
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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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|
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mincusize = thescene.cusize / resolu - FTINY; |
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|
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for (i = startobj; i < nobjects; i++) /* add new objects */ |
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addobject(&thescene, i); |
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|
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thescene.cutree = combine(thescene.cutree); /* optimize */ |
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|
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writeoct(outflags, &thescene, ofname); /* write structures to stdout */ |
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|
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quit(0); |
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} |
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|
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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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|
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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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|
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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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|
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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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static int inln = 0; |
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|
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if (!inln++) { |
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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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inln = 0; |
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} |
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|
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|
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#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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|
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|
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addobject(cu, obj) /* add an object to a cube */ |
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register CUBE *cu; |
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OBJECT obj; |
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{ |
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CUBE cukid; |
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OCTREE ot; |
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OBJECT oset[MAXSET+1]; |
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unsigned char inflg[MAXSET/8], volflg[MAXSET/8]; |
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int in; |
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register int i, j; |
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|
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in = (*ofun[objptr(obj)->otype].funp)(objptr(obj), cu); |
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|
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if (in == O_MISS) |
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return; /* no intersection */ |
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|
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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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return; |
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} |
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if (isempty(cu->cutree)) { |
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/* singular set */ |
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oset[0] = 1; oset[1] = obj; |
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cu->cutree = fullnode(oset); |
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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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|
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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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sprintf(errmsg, |
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"set overflow in addobject (%s)", |
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objptr(obj)->oname); |
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error(INTERNAL, errmsg); |
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} |
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insertelem(oset, obj); |
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cu->cutree = fullnode(oset); |
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return; |
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} |
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/* 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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(objptr(oset[j]),cu) == O_IN) |
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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); |
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/* partial volumes */ |
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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]); |
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/* full volumes */ |
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for (j = 1; j <= oset[0]; j++) |
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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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} |
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cu->cutree = ot; |
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} |
