| 1 |
/* Copyright (c) 1986 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* oconv.c - main program for object to octree conversion. |
| 9 |
* |
| 10 |
* 7/29/85 |
| 11 |
*/ |
| 12 |
|
| 13 |
#include "standard.h" |
| 14 |
|
| 15 |
#include "octree.h" |
| 16 |
|
| 17 |
#include "object.h" |
| 18 |
|
| 19 |
#include "otypes.h" |
| 20 |
|
| 21 |
#ifndef DEFPATH |
| 22 |
#define DEFPATH ":/usr/local/lib/ray" |
| 23 |
#endif |
| 24 |
|
| 25 |
#define OMARGIN (10*FTINY) /* margin around global cube */ |
| 26 |
|
| 27 |
#define MAXOBJFIL 63 /* maximum number of scene files */ |
| 28 |
|
| 29 |
char *progname; /* argv[0] */ |
| 30 |
|
| 31 |
char *libpath; /* library search path */ |
| 32 |
|
| 33 |
int nowarn = 0; /* supress warnings? */ |
| 34 |
|
| 35 |
int objlim = 5; /* # of objects before split */ |
| 36 |
|
| 37 |
int resolu = 1024; /* octree resolution limit */ |
| 38 |
|
| 39 |
CUBE thescene = {EMPTY, {0.0, 0.0, 0.0}, 0.0}; /* our scene */ |
| 40 |
|
| 41 |
char *ofname[MAXOBJFIL+1]; /* object file names */ |
| 42 |
int nfiles = 0; /* number of object files */ |
| 43 |
|
| 44 |
double mincusize; /* minimum cube size from resolu */ |
| 45 |
|
| 46 |
int (*addobjnotify[])() = {NULL}; /* new object notifier functions */ |
| 47 |
|
| 48 |
|
| 49 |
main(argc, argv) /* convert object files to an octree */ |
| 50 |
int argc; |
| 51 |
char **argv; |
| 52 |
{ |
| 53 |
char *getenv(); |
| 54 |
double atof(); |
| 55 |
FVECT bbmin, bbmax; |
| 56 |
char *infile = NULL; |
| 57 |
int outflags = IO_ALL; |
| 58 |
OBJECT startobj; |
| 59 |
int i; |
| 60 |
|
| 61 |
progname = argv[0]; |
| 62 |
|
| 63 |
if ((libpath = getenv("RAYPATH")) == NULL) |
| 64 |
libpath = DEFPATH; |
| 65 |
|
| 66 |
initotypes(); |
| 67 |
|
| 68 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 69 |
switch (argv[i][1]) { |
| 70 |
case '\0': /* scene from stdin */ |
| 71 |
goto breakopt; |
| 72 |
case 'i': /* input octree */ |
| 73 |
infile = argv[++i]; |
| 74 |
break; |
| 75 |
case 'b': /* bounding cube */ |
| 76 |
thescene.cuorg[0] = atof(argv[++i]) - OMARGIN; |
| 77 |
thescene.cuorg[1] = atof(argv[++i]) - OMARGIN; |
| 78 |
thescene.cuorg[2] = atof(argv[++i]) - OMARGIN; |
| 79 |
thescene.cusize = atof(argv[++i]) + 2*OMARGIN; |
| 80 |
break; |
| 81 |
case 'n': /* set limit */ |
| 82 |
objlim = atoi(argv[++i]); |
| 83 |
break; |
| 84 |
case 'r': /* resolution limit */ |
| 85 |
resolu = atoi(argv[++i]); |
| 86 |
break; |
| 87 |
case 'f': /* freeze octree */ |
| 88 |
outflags &= ~IO_FILES; |
| 89 |
break; |
| 90 |
case 'w': /* supress warnings */ |
| 91 |
nowarn = 1; |
| 92 |
break; |
| 93 |
default: |
| 94 |
sprintf(errmsg, "unknown option: '%s'", argv[i]); |
| 95 |
error(USER, errmsg); |
| 96 |
break; |
| 97 |
} |
| 98 |
breakopt: |
| 99 |
if (infile != NULL) { /* get old octree & objects */ |
| 100 |
if (thescene.cusize > FTINY) |
| 101 |
error(USER, "only one of '-b' or '-i'"); |
| 102 |
nfiles = readoct(infile, IO_ALL, &thescene, ofname); |
| 103 |
if (nfiles == 0 && outflags & IO_FILES) { |
| 104 |
error(WARNING, "frozen octree"); |
| 105 |
outflags &= ~IO_FILES; |
| 106 |
} |
| 107 |
} |
| 108 |
|
| 109 |
printargs(argc, argv, stdout); /* info. header */ |
| 110 |
fputformat(OCTFMT, stdout); |
| 111 |
printf("\n"); |
| 112 |
|
| 113 |
startobj = nobjects; /* previous objects already converted */ |
| 114 |
|
| 115 |
for ( ; i < argc; i++) /* read new scene descriptions */ |
| 116 |
if (!strcmp(argv[i], "-")) { /* from stdin */ |
| 117 |
readobj(NULL); |
| 118 |
outflags &= ~IO_FILES; |
| 119 |
} else { /* from file */ |
| 120 |
if (nfiles >= MAXOBJFIL) |
| 121 |
error(INTERNAL, "too many scene files"); |
| 122 |
readobj(ofname[nfiles++] = argv[i]); |
| 123 |
} |
| 124 |
|
| 125 |
ofname[nfiles] = NULL; |
| 126 |
/* find bounding box */ |
| 127 |
bbmin[0] = bbmin[1] = bbmin[2] = FHUGE; |
| 128 |
bbmax[0] = bbmax[1] = bbmax[2] = -FHUGE; |
| 129 |
for (i = startobj; i < nobjects; i++) |
| 130 |
add2bbox(objptr(i), bbmin, bbmax); |
| 131 |
/* set/check cube */ |
| 132 |
if (thescene.cusize == 0.0) { |
| 133 |
if (bbmin[0] <= bbmax[0]) { |
| 134 |
for (i = 0; i < 3; i++) { |
| 135 |
bbmin[i] -= OMARGIN; |
| 136 |
bbmax[i] += OMARGIN; |
| 137 |
} |
| 138 |
for (i = 0; i < 3; i++) |
| 139 |
if (bbmax[i] - bbmin[i] > thescene.cusize) |
| 140 |
thescene.cusize = bbmax[i] - bbmin[i]; |
| 141 |
for (i = 0; i < 3; i++) |
| 142 |
thescene.cuorg[i] = |
| 143 |
(bbmax[i]+bbmin[i]-thescene.cusize)*.5; |
| 144 |
} |
| 145 |
} else { |
| 146 |
for (i = 0; i < 3; i++) |
| 147 |
if (bbmin[i] < thescene.cuorg[i] || |
| 148 |
bbmax[i] > thescene.cuorg[i] + thescene.cusize) |
| 149 |
error(USER, "boundary does not encompass scene"); |
| 150 |
} |
| 151 |
|
| 152 |
mincusize = thescene.cusize / resolu - FTINY; |
| 153 |
|
| 154 |
for (i = startobj; i < nobjects; i++) /* add new objects */ |
| 155 |
addobject(&thescene, i); |
| 156 |
|
| 157 |
thescene.cutree = combine(thescene.cutree); /* optimize */ |
| 158 |
|
| 159 |
writeoct(outflags, &thescene, ofname); /* write structures to stdout */ |
| 160 |
|
| 161 |
quit(0); |
| 162 |
} |
| 163 |
|
| 164 |
|
| 165 |
quit(code) /* exit program */ |
| 166 |
int code; |
| 167 |
{ |
| 168 |
exit(code); |
| 169 |
} |
| 170 |
|
| 171 |
|
| 172 |
cputs() /* interactive error */ |
| 173 |
{ |
| 174 |
/* referenced, but not used */ |
| 175 |
} |
| 176 |
|
| 177 |
|
| 178 |
wputs(s) /* warning message */ |
| 179 |
char *s; |
| 180 |
{ |
| 181 |
if (!nowarn) |
| 182 |
eputs(s); |
| 183 |
} |
| 184 |
|
| 185 |
|
| 186 |
eputs(s) /* put string to stderr */ |
| 187 |
register char *s; |
| 188 |
{ |
| 189 |
static int inln = 0; |
| 190 |
|
| 191 |
if (!inln++) { |
| 192 |
fputs(progname, stderr); |
| 193 |
fputs(": ", stderr); |
| 194 |
} |
| 195 |
fputs(s, stderr); |
| 196 |
if (*s && s[strlen(s)-1] == '\n') |
| 197 |
inln = 0; |
| 198 |
} |
| 199 |
|
| 200 |
|
| 201 |
#define bitop(f,i,op) (f[((i)>>3)] op (1<<((i)&7))) |
| 202 |
#define tstbit(f,i) bitop(f,i,&) |
| 203 |
#define setbit(f,i) bitop(f,i,|=) |
| 204 |
#define clrbit(f,i) bitop(f,i,&=~) |
| 205 |
#define tglbit(f,i) bitop(f,i,^=) |
| 206 |
|
| 207 |
|
| 208 |
addobject(cu, obj) /* add an object to a cube */ |
| 209 |
register CUBE *cu; |
| 210 |
OBJECT obj; |
| 211 |
{ |
| 212 |
CUBE cukid; |
| 213 |
OCTREE ot; |
| 214 |
OBJECT oset[MAXSET+1]; |
| 215 |
unsigned char inflg[MAXSET/8], volflg[MAXSET/8]; |
| 216 |
int in; |
| 217 |
register int i, j; |
| 218 |
|
| 219 |
in = (*ofun[objptr(obj)->otype].funp)(objptr(obj), cu); |
| 220 |
|
| 221 |
if (in == O_MISS) |
| 222 |
return; /* no intersection */ |
| 223 |
|
| 224 |
if (istree(cu->cutree)) { |
| 225 |
/* do children */ |
| 226 |
cukid.cusize = cu->cusize * 0.5; |
| 227 |
for (i = 0; i < 8; i++) { |
| 228 |
cukid.cutree = octkid(cu->cutree, i); |
| 229 |
for (j = 0; j < 3; j++) { |
| 230 |
cukid.cuorg[j] = cu->cuorg[j]; |
| 231 |
if ((1<<j) & i) |
| 232 |
cukid.cuorg[j] += cukid.cusize; |
| 233 |
} |
| 234 |
addobject(&cukid, obj); |
| 235 |
octkid(cu->cutree, i) = cukid.cutree; |
| 236 |
} |
| 237 |
return; |
| 238 |
} |
| 239 |
if (isempty(cu->cutree)) { |
| 240 |
/* singular set */ |
| 241 |
oset[0] = 1; oset[1] = obj; |
| 242 |
cu->cutree = fullnode(oset); |
| 243 |
return; |
| 244 |
} |
| 245 |
/* add to full node */ |
| 246 |
objset(oset, cu->cutree); |
| 247 |
cukid.cusize = cu->cusize * 0.5; |
| 248 |
|
| 249 |
if (in==O_IN || oset[0] < objlim || cukid.cusize < mincusize) { |
| 250 |
/* add to set */ |
| 251 |
if (oset[0] >= MAXSET) { |
| 252 |
sprintf(errmsg, |
| 253 |
"set overflow in addobject (%s)", |
| 254 |
objptr(obj)->oname); |
| 255 |
error(INTERNAL, errmsg); |
| 256 |
} |
| 257 |
insertelem(oset, obj); |
| 258 |
cu->cutree = fullnode(oset); |
| 259 |
return; |
| 260 |
} |
| 261 |
/* subdivide cube */ |
| 262 |
if ((ot = octalloc()) == EMPTY) |
| 263 |
error(SYSTEM, "out of octree space"); |
| 264 |
/* mark volumes */ |
| 265 |
j = (oset[0]+7)>>3; |
| 266 |
while (j--) |
| 267 |
volflg[j] = inflg[j] = 0; |
| 268 |
for (j = 1; j <= oset[0]; j++) |
| 269 |
if (isvolume(objptr(oset[j])->otype)) { |
| 270 |
setbit(volflg,j-1); |
| 271 |
if ((*ofun[objptr(oset[j])->otype].funp) |
| 272 |
(objptr(oset[j]),cu) == O_IN) |
| 273 |
setbit(inflg,j-1); |
| 274 |
} |
| 275 |
/* assign subcubes */ |
| 276 |
for (i = 0; i < 8; i++) { |
| 277 |
cukid.cutree = EMPTY; |
| 278 |
for (j = 0; j < 3; j++) { |
| 279 |
cukid.cuorg[j] = cu->cuorg[j]; |
| 280 |
if ((1<<j) & i) |
| 281 |
cukid.cuorg[j] += cukid.cusize; |
| 282 |
} |
| 283 |
/* surfaces first */ |
| 284 |
for (j = 1; j <= oset[0]; j++) |
| 285 |
if (!tstbit(volflg,j-1)) |
| 286 |
addobject(&cukid, oset[j]); |
| 287 |
/* then this object */ |
| 288 |
addobject(&cukid, obj); |
| 289 |
/* partial volumes */ |
| 290 |
for (j = 1; j <= oset[0]; j++) |
| 291 |
if (tstbit(volflg,j-1) && |
| 292 |
!tstbit(inflg,j-1)) |
| 293 |
addobject(&cukid, oset[j]); |
| 294 |
/* full volumes */ |
| 295 |
for (j = 1; j <= oset[0]; j++) |
| 296 |
if (tstbit(inflg,j-1)) |
| 297 |
addobject(&cukid, oset[j]); |
| 298 |
/* returned node */ |
| 299 |
octkid(ot, i) = cukid.cutree; |
| 300 |
} |
| 301 |
cu->cutree = ot; |
| 302 |
} |
