| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: obj2mesh.c,v 2.6 2003/06/08 12:03:10 schorsch 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 "platform.h" |
| 10 |
#include "standard.h" |
| 11 |
#include "cvmesh.h" |
| 12 |
#include "otypes.h" |
| 13 |
|
| 14 |
extern int o_face(); |
| 15 |
|
| 16 |
int o_default() { return(O_MISS); } |
| 17 |
|
| 18 |
FUN ofun[NUMOTYPE] = INIT_OTYPE; /* needed for link resolution */ |
| 19 |
|
| 20 |
char *progname; /* argv[0] */ |
| 21 |
|
| 22 |
int nowarn = 0; /* supress warnings? */ |
| 23 |
|
| 24 |
int objlim = 15; /* # of objects before split */ |
| 25 |
|
| 26 |
int resolu = 16384; /* octree resolution limit */ |
| 27 |
|
| 28 |
double mincusize; /* minimum cube size from resolu */ |
| 29 |
|
| 30 |
|
| 31 |
main(argc, argv) /* compile a .OBJ file into a mesh */ |
| 32 |
int argc; |
| 33 |
char *argv[]; |
| 34 |
{ |
| 35 |
int nmatf = 0; |
| 36 |
char *matinp[32]; |
| 37 |
int i, j; |
| 38 |
|
| 39 |
progname = argv[0]; |
| 40 |
ofun[OBJ_FACE].funp = o_face; |
| 41 |
|
| 42 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) |
| 43 |
switch (argv[i][1]) { |
| 44 |
case 'n': /* set limit */ |
| 45 |
objlim = atoi(argv[++i]); |
| 46 |
break; |
| 47 |
case 'r': /* resolution limit */ |
| 48 |
resolu = atoi(argv[++i]); |
| 49 |
break; |
| 50 |
case 'a': /* material file */ |
| 51 |
matinp[nmatf++] = argv[++i]; |
| 52 |
break; |
| 53 |
case 'w': /* supress warnings */ |
| 54 |
nowarn = 1; |
| 55 |
break; |
| 56 |
default: |
| 57 |
sprintf(errmsg, "unknown option: '%s'", argv[i]); |
| 58 |
error(USER, errmsg); |
| 59 |
break; |
| 60 |
} |
| 61 |
|
| 62 |
if (i < argc-2) |
| 63 |
error(USER, "too many file arguments"); |
| 64 |
/* initialize mesh */ |
| 65 |
cvinit(i==argc-2 ? argv[i+1] : "<stdout>"); |
| 66 |
/* load material input */ |
| 67 |
for (j = 0; j < nmatf; j++) |
| 68 |
readobj(matinp[j]); |
| 69 |
/* read .OBJ file into triangles */ |
| 70 |
if (i == argc) |
| 71 |
wfreadobj(NULL); |
| 72 |
else |
| 73 |
wfreadobj(argv[i]); |
| 74 |
|
| 75 |
cvmeshbounds(); /* set octree boundaries */ |
| 76 |
|
| 77 |
if (i == argc-2) /* open output file */ |
| 78 |
if (freopen(argv[i+1], "w", stdout) == NULL) |
| 79 |
error(SYSTEM, "cannot open output file"); |
| 80 |
SET_FILE_BINARY(stdout); |
| 81 |
newheader("RADIANCE", stdout); /* new binary file header */ |
| 82 |
printargs(i<argc ? i+1 : argc, argv, stdout); |
| 83 |
fputformat(MESHFMT, stdout); |
| 84 |
fputc('\n', stdout); |
| 85 |
|
| 86 |
mincusize = ourmesh->mcube.cusize / resolu - FTINY; |
| 87 |
|
| 88 |
for (i = 0; i < nobjects; i++) /* add triangles to octree */ |
| 89 |
if (objptr(i)->otype == OBJ_FACE) |
| 90 |
addface(&ourmesh->mcube, i); |
| 91 |
|
| 92 |
/* optimize octree */ |
| 93 |
ourmesh->mcube.cutree = combine(ourmesh->mcube.cutree); |
| 94 |
|
| 95 |
if (ourmesh->mcube.cutree == EMPTY) |
| 96 |
error(WARNING, "mesh is empty"); |
| 97 |
|
| 98 |
cvmesh(); /* convert mesh and leaf nodes */ |
| 99 |
|
| 100 |
writemesh(ourmesh, stdout); /* write mesh to output */ |
| 101 |
|
| 102 |
/* printmeshstats(ourmesh, stderr); */ |
| 103 |
|
| 104 |
quit(0); |
| 105 |
} |
| 106 |
|
| 107 |
|
| 108 |
void |
| 109 |
quit(code) /* exit program */ |
| 110 |
int code; |
| 111 |
{ |
| 112 |
exit(code); |
| 113 |
} |
| 114 |
|
| 115 |
|
| 116 |
void |
| 117 |
cputs() /* interactive error */ |
| 118 |
{ |
| 119 |
/* referenced, but not used */ |
| 120 |
} |
| 121 |
|
| 122 |
|
| 123 |
void |
| 124 |
wputs(s) /* warning message */ |
| 125 |
char *s; |
| 126 |
{ |
| 127 |
if (!nowarn) |
| 128 |
eputs(s); |
| 129 |
} |
| 130 |
|
| 131 |
|
| 132 |
void |
| 133 |
eputs(s) /* put string to stderr */ |
| 134 |
register char *s; |
| 135 |
{ |
| 136 |
static int inln = 0; |
| 137 |
|
| 138 |
if (!inln++) { |
| 139 |
fputs(progname, stderr); |
| 140 |
fputs(": ", stderr); |
| 141 |
} |
| 142 |
fputs(s, stderr); |
| 143 |
if (*s && s[strlen(s)-1] == '\n') |
| 144 |
inln = 0; |
| 145 |
} |
| 146 |
|
| 147 |
|
| 148 |
addface(cu, obj) /* add a face to a cube */ |
| 149 |
register CUBE *cu; |
| 150 |
OBJECT obj; |
| 151 |
{ |
| 152 |
|
| 153 |
if (o_face(objptr(obj), cu) == O_MISS) |
| 154 |
return; |
| 155 |
|
| 156 |
if (istree(cu->cutree)) { |
| 157 |
CUBE cukid; /* do children */ |
| 158 |
int i, j; |
| 159 |
cukid.cusize = cu->cusize * 0.5; |
| 160 |
for (i = 0; i < 8; i++) { |
| 161 |
cukid.cutree = octkid(cu->cutree, i); |
| 162 |
for (j = 0; j < 3; j++) { |
| 163 |
cukid.cuorg[j] = cu->cuorg[j]; |
| 164 |
if ((1<<j) & i) |
| 165 |
cukid.cuorg[j] += cukid.cusize; |
| 166 |
} |
| 167 |
addface(&cukid, obj); |
| 168 |
octkid(cu->cutree, i) = cukid.cutree; |
| 169 |
} |
| 170 |
return; |
| 171 |
} |
| 172 |
if (isempty(cu->cutree)) { |
| 173 |
OBJECT oset[2]; /* singular set */ |
| 174 |
oset[0] = 1; oset[1] = obj; |
| 175 |
cu->cutree = fullnode(oset); |
| 176 |
return; |
| 177 |
} |
| 178 |
/* add to full node */ |
| 179 |
add2full(cu, obj); |
| 180 |
} |
| 181 |
|
| 182 |
|
| 183 |
add2full(cu, obj) /* add object to full node */ |
| 184 |
register CUBE *cu; |
| 185 |
OBJECT obj; |
| 186 |
{ |
| 187 |
OCTREE ot; |
| 188 |
OBJECT oset[MAXSET+1]; |
| 189 |
CUBE cukid; |
| 190 |
register int i, j; |
| 191 |
|
| 192 |
objset(oset, cu->cutree); |
| 193 |
cukid.cusize = cu->cusize * 0.5; |
| 194 |
|
| 195 |
if (oset[0] < objlim || cukid.cusize < mincusize) { |
| 196 |
/* add to set */ |
| 197 |
if (oset[0] >= MAXSET) { |
| 198 |
sprintf(errmsg, "set overflow in addobject (%s)", |
| 199 |
objptr(obj)->oname); |
| 200 |
error(INTERNAL, errmsg); |
| 201 |
} |
| 202 |
insertelem(oset, obj); |
| 203 |
cu->cutree = fullnode(oset); |
| 204 |
return; |
| 205 |
} |
| 206 |
/* subdivide cube */ |
| 207 |
if ((ot = octalloc()) == EMPTY) |
| 208 |
error(SYSTEM, "out of octree space"); |
| 209 |
/* assign subcubes */ |
| 210 |
for (i = 0; i < 8; i++) { |
| 211 |
cukid.cutree = EMPTY; |
| 212 |
for (j = 0; j < 3; j++) { |
| 213 |
cukid.cuorg[j] = cu->cuorg[j]; |
| 214 |
if ((1<<j) & i) |
| 215 |
cukid.cuorg[j] += cukid.cusize; |
| 216 |
} |
| 217 |
for (j = 1; j <= oset[0]; j++) |
| 218 |
addface(&cukid, oset[j]); |
| 219 |
addface(&cukid, obj); |
| 220 |
/* returned node */ |
| 221 |
octkid(ot, i) = cukid.cutree; |
| 222 |
} |
| 223 |
cu->cutree = ot; |
| 224 |
} |
