| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: obj2mesh.c,v 2.16 2021/07/28 22:16:43 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Main program to compile a Wavefront .OBJ file into a Radiance mesh |
| 6 |
*/ |
| 7 |
|
| 8 |
#include "copyright.h" |
| 9 |
#include "paths.h" |
| 10 |
#include "platform.h" |
| 11 |
#include "standard.h" |
| 12 |
#include "resolu.h" |
| 13 |
#include "cvmesh.h" |
| 14 |
#include "otypes.h" |
| 15 |
|
| 16 |
extern int o_face(); /* XXX should go to a header file */ |
| 17 |
|
| 18 |
int o_default() { return(O_MISS); } |
| 19 |
|
| 20 |
FUN ofun[NUMOTYPE] = INIT_OTYPE; /* needed for link resolution */ |
| 21 |
|
| 22 |
char *progname; /* argv[0] */ |
| 23 |
|
| 24 |
int nowarn = 0; /* supress warnings? */ |
| 25 |
|
| 26 |
int objlim = 9; /* # of objects before split */ |
| 27 |
|
| 28 |
int resolu = 16384; /* octree resolution limit */ |
| 29 |
|
| 30 |
double mincusize; /* minimum cube size from resolu */ |
| 31 |
|
| 32 |
static void addface(CUBE *cu, OBJECT obj); |
| 33 |
static void add2full(CUBE *cu, OBJECT obj); |
| 34 |
|
| 35 |
|
| 36 |
int |
| 37 |
main( /* compile a .OBJ file into a mesh */ |
| 38 |
int argc, |
| 39 |
char *argv[] |
| 40 |
) |
| 41 |
{ |
| 42 |
int verbose = 0; |
| 43 |
char *cp; |
| 44 |
int i, j; |
| 45 |
|
| 46 |
progname = argv[0]; |
| 47 |
ofun[OBJ_FACE].funp = o_face; |
| 48 |
|
| 49 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 50 |
switch (argv[i][1]) { |
| 51 |
case 'n': /* set limit */ |
| 52 |
objlim = atoi(argv[++i]); |
| 53 |
break; |
| 54 |
case 'r': /* resolution limit */ |
| 55 |
resolu = atoi(argv[++i]); |
| 56 |
break; |
| 57 |
case 'a': /* material file */ |
| 58 |
readobj(argv[++i]); |
| 59 |
break; |
| 60 |
case 'l': /* library material */ |
| 61 |
cp = getpath(argv[++i], getrlibpath(), R_OK); |
| 62 |
if (cp == NULL) { |
| 63 |
sprintf(errmsg, |
| 64 |
"cannot find library material: '%s'", |
| 65 |
argv[i]); |
| 66 |
error(SYSTEM, errmsg); |
| 67 |
} |
| 68 |
readobj(cp); |
| 69 |
break; |
| 70 |
case 'w': /* supress warnings */ |
| 71 |
nowarn = 1; |
| 72 |
break; |
| 73 |
case 'v': /* print mesh stats */ |
| 74 |
verbose = 1; |
| 75 |
break; |
| 76 |
default: |
| 77 |
sprintf(errmsg, "unknown option: '%s'", argv[i]); |
| 78 |
error(USER, errmsg); |
| 79 |
break; |
| 80 |
} |
| 81 |
|
| 82 |
if (i < argc-2) |
| 83 |
error(USER, "too many file arguments"); |
| 84 |
/* initialize mesh */ |
| 85 |
cvinit(i==argc-2 ? argv[i+1] : "<stdout>"); |
| 86 |
/* read .OBJ file into triangles */ |
| 87 |
if (i == argc) |
| 88 |
wfreadobj(NULL); |
| 89 |
else |
| 90 |
wfreadobj(argv[i]); |
| 91 |
|
| 92 |
cvmeshbounds(); /* set octree boundaries */ |
| 93 |
|
| 94 |
if (i == argc-2) /* open output file */ |
| 95 |
if (freopen(argv[i+1], "w", stdout) == NULL) |
| 96 |
error(SYSTEM, "cannot open output file"); |
| 97 |
SET_FILE_BINARY(stdout); |
| 98 |
newheader("RADIANCE", stdout); /* new binary file header */ |
| 99 |
printargs(i<argc ? i+1 : argc, argv, stdout); |
| 100 |
fputformat(MESHFMT, stdout); |
| 101 |
fputc('\n', stdout); |
| 102 |
|
| 103 |
mincusize = ourmesh->mcube.cusize / resolu - FTINY; |
| 104 |
|
| 105 |
for (i = 0; i < nobjects; i++) /* add triangles to octree */ |
| 106 |
if (objptr(i)->otype == OBJ_FACE) |
| 107 |
addface(&ourmesh->mcube, i); |
| 108 |
|
| 109 |
/* optimize octree */ |
| 110 |
ourmesh->mcube.cutree = combine(ourmesh->mcube.cutree); |
| 111 |
|
| 112 |
if (ourmesh->mcube.cutree == EMPTY) |
| 113 |
error(WARNING, "mesh is empty"); |
| 114 |
|
| 115 |
cvmesh(); /* convert mesh and leaf nodes */ |
| 116 |
|
| 117 |
writemesh(ourmesh, stdout); /* write mesh to output */ |
| 118 |
|
| 119 |
if (verbose) |
| 120 |
printmeshstats(ourmesh, stderr); |
| 121 |
|
| 122 |
quit(0); |
| 123 |
return 0; /* pro forma return */ |
| 124 |
} |
| 125 |
|
| 126 |
|
| 127 |
void |
| 128 |
quit( /* exit program */ |
| 129 |
int code |
| 130 |
) |
| 131 |
{ |
| 132 |
exit(code); |
| 133 |
} |
| 134 |
|
| 135 |
|
| 136 |
void |
| 137 |
cputs(void) /* interactive error */ |
| 138 |
{ |
| 139 |
/* referenced, but not used */ |
| 140 |
} |
| 141 |
|
| 142 |
|
| 143 |
void |
| 144 |
wputs( /* warning message */ |
| 145 |
const char *s |
| 146 |
) |
| 147 |
{ |
| 148 |
if (!nowarn) |
| 149 |
eputs(s); |
| 150 |
} |
| 151 |
|
| 152 |
|
| 153 |
void |
| 154 |
eputs( /* put string to stderr */ |
| 155 |
const char *s |
| 156 |
) |
| 157 |
{ |
| 158 |
static int inln = 0; |
| 159 |
|
| 160 |
if (!inln++) { |
| 161 |
fputs(progname, stderr); |
| 162 |
fputs(": ", stderr); |
| 163 |
} |
| 164 |
fputs(s, stderr); |
| 165 |
if (*s && s[strlen(s)-1] == '\n') |
| 166 |
inln = 0; |
| 167 |
} |
| 168 |
|
| 169 |
|
| 170 |
static void |
| 171 |
addface( /* add a face to a cube */ |
| 172 |
CUBE *cu, |
| 173 |
OBJECT obj |
| 174 |
) |
| 175 |
{ |
| 176 |
|
| 177 |
if (o_face(objptr(obj), cu) == O_MISS) |
| 178 |
return; |
| 179 |
|
| 180 |
if (istree(cu->cutree)) { |
| 181 |
CUBE cukid; /* do children */ |
| 182 |
int i, j; |
| 183 |
cukid.cusize = cu->cusize * 0.5; |
| 184 |
for (i = 0; i < 8; i++) { |
| 185 |
cukid.cutree = octkid(cu->cutree, i); |
| 186 |
for (j = 0; j < 3; j++) { |
| 187 |
cukid.cuorg[j] = cu->cuorg[j]; |
| 188 |
if ((1<<j) & i) |
| 189 |
cukid.cuorg[j] += cukid.cusize; |
| 190 |
} |
| 191 |
addface(&cukid, obj); |
| 192 |
octkid(cu->cutree, i) = cukid.cutree; |
| 193 |
} |
| 194 |
return; |
| 195 |
} |
| 196 |
if (isempty(cu->cutree)) { |
| 197 |
OBJECT oset[2]; /* singular set */ |
| 198 |
oset[0] = 1; oset[1] = obj; |
| 199 |
cu->cutree = fullnode(oset); |
| 200 |
return; |
| 201 |
} |
| 202 |
/* add to full node */ |
| 203 |
add2full(cu, obj); |
| 204 |
} |
| 205 |
|
| 206 |
|
| 207 |
static void |
| 208 |
add2full( /* add object to full node */ |
| 209 |
CUBE *cu, |
| 210 |
OBJECT obj |
| 211 |
) |
| 212 |
{ |
| 213 |
OCTREE ot; |
| 214 |
OBJECT oset[MAXSET+1]; |
| 215 |
CUBE cukid; |
| 216 |
int i, j; |
| 217 |
|
| 218 |
objset(oset, cu->cutree); |
| 219 |
cukid.cusize = cu->cusize * 0.5; |
| 220 |
|
| 221 |
if (oset[0] < objlim || cukid.cusize < |
| 222 |
(oset[0] < MAXSET ? mincusize : mincusize/256.0)) { |
| 223 |
/* add to set */ |
| 224 |
if (oset[0] >= MAXSET) { |
| 225 |
sprintf(errmsg, "set overflow in addobject (%s)", |
| 226 |
objptr(obj)->oname); |
| 227 |
error(INTERNAL, errmsg); |
| 228 |
} |
| 229 |
insertelem(oset, obj); |
| 230 |
cu->cutree = fullnode(oset); |
| 231 |
return; |
| 232 |
} |
| 233 |
/* subdivide cube */ |
| 234 |
if ((ot = octalloc()) == EMPTY) |
| 235 |
error(SYSTEM, "out of octree space"); |
| 236 |
/* assign subcubes */ |
| 237 |
for (i = 0; i < 8; i++) { |
| 238 |
cukid.cutree = EMPTY; |
| 239 |
for (j = 0; j < 3; j++) { |
| 240 |
cukid.cuorg[j] = cu->cuorg[j]; |
| 241 |
if ((1<<j) & i) |
| 242 |
cukid.cuorg[j] += cukid.cusize; |
| 243 |
} |
| 244 |
for (j = 1; j <= oset[0]; j++) |
| 245 |
addface(&cukid, oset[j]); |
| 246 |
addface(&cukid, obj); |
| 247 |
/* returned node */ |
| 248 |
octkid(ot, i) = cukid.cutree; |
| 249 |
} |
| 250 |
cu->cutree = ot; |
| 251 |
} |
