| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: readoct.c,v 2.25 2004/04/29 14:36:49 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* readoct.c - routines to read octree information. |
| 6 |
*/ |
| 7 |
|
| 8 |
#include "copyright.h" |
| 9 |
|
| 10 |
#include <stdio.h> |
| 11 |
#include <time.h> |
| 12 |
|
| 13 |
#include "platform.h" |
| 14 |
#include "rtprocess.h" |
| 15 |
#include "standard.h" |
| 16 |
#include "octree.h" |
| 17 |
#include "object.h" |
| 18 |
#include "otypes.h" |
| 19 |
#include "resolu.h" |
| 20 |
|
| 21 |
#ifdef getc_unlocked /* avoid horrendous overhead of flockfile */ |
| 22 |
#undef getc |
| 23 |
#define getc getc_unlocked |
| 24 |
#endif |
| 25 |
|
| 26 |
static double ogetflt(void); |
| 27 |
static long ogetint(int); |
| 28 |
static char *ogetstr(char *); |
| 29 |
static int nonsurfinset(OBJECT *); |
| 30 |
static void octerror(int etyp, char *msg); |
| 31 |
static void skiptree(void); |
| 32 |
static OCTREE getfullnode(void), gettree(void); |
| 33 |
|
| 34 |
static char *infn; /* input file specification */ |
| 35 |
static FILE *infp; /* input file stream */ |
| 36 |
static int objsize; /* size of stored OBJECT's */ |
| 37 |
static OBJECT objorig; /* zeroeth object */ |
| 38 |
static OBJECT fnobjects; /* number of objects in this file */ |
| 39 |
|
| 40 |
|
| 41 |
int |
| 42 |
readoct(inpspec, load, scene, ofn) /* read in octree file or stream */ |
| 43 |
char *inpspec; |
| 44 |
int load; |
| 45 |
CUBE *scene; |
| 46 |
char *ofn[]; |
| 47 |
{ |
| 48 |
char sbuf[512]; |
| 49 |
int nf; |
| 50 |
int i; |
| 51 |
long m; |
| 52 |
|
| 53 |
if (inpspec == NULL) { |
| 54 |
infn = "standard input"; |
| 55 |
infp = stdin; |
| 56 |
} else if (inpspec[0] == '!') { |
| 57 |
infn = inpspec; |
| 58 |
if ((infp = popen(inpspec+1, "r")) == NULL) { |
| 59 |
sprintf(errmsg, "cannot execute \"%s\"", inpspec); |
| 60 |
error(SYSTEM, errmsg); |
| 61 |
} |
| 62 |
} else { |
| 63 |
infn = inpspec; |
| 64 |
if ((infp = fopen(inpspec, "r")) == NULL) { |
| 65 |
sprintf(errmsg, "cannot open octree file \"%s\"", |
| 66 |
inpspec); |
| 67 |
error(SYSTEM, errmsg); |
| 68 |
} |
| 69 |
} |
| 70 |
SET_FILE_BINARY(infp); |
| 71 |
/* get header */ |
| 72 |
if (checkheader(infp, OCTFMT, load&IO_INFO ? stdout : (FILE *)NULL) < 0) |
| 73 |
octerror(USER, "not an octree"); |
| 74 |
/* check format */ |
| 75 |
if ((objsize = ogetint(2)-OCTMAGIC) <= 0 || |
| 76 |
objsize > MAXOBJSIZ || objsize > sizeof(long)) |
| 77 |
octerror(USER, "incompatible octree format"); |
| 78 |
/* get boundaries */ |
| 79 |
if (load & IO_BOUNDS) { |
| 80 |
for (i = 0; i < 3; i++) |
| 81 |
scene->cuorg[i] = atof(ogetstr(sbuf)); |
| 82 |
scene->cusize = atof(ogetstr(sbuf)); |
| 83 |
} else { |
| 84 |
for (i = 0; i < 4; i++) |
| 85 |
ogetstr(sbuf); |
| 86 |
} |
| 87 |
objorig = nobjects; /* set object offset */ |
| 88 |
nf = 0; /* get object files */ |
| 89 |
while (*ogetstr(sbuf)) { |
| 90 |
if (load & IO_SCENE) |
| 91 |
readobj(sbuf); |
| 92 |
if (load & IO_FILES) |
| 93 |
ofn[nf] = savqstr(sbuf); |
| 94 |
nf++; |
| 95 |
} |
| 96 |
if (load & IO_FILES) |
| 97 |
ofn[nf] = NULL; |
| 98 |
/* get number of objects */ |
| 99 |
fnobjects = m = ogetint(objsize); |
| 100 |
if (fnobjects != m) |
| 101 |
octerror(USER, "too many objects"); |
| 102 |
|
| 103 |
if (load & IO_TREE) /* get the octree */ |
| 104 |
scene->cutree = gettree(); |
| 105 |
else if (load & IO_SCENE && nf == 0) |
| 106 |
skiptree(); |
| 107 |
|
| 108 |
if (load & IO_SCENE) { /* get the scene */ |
| 109 |
if (nf == 0) { |
| 110 |
/* load binary scene data */ |
| 111 |
readscene(infp, objsize); |
| 112 |
|
| 113 |
} else { /* consistency checks */ |
| 114 |
/* check object count */ |
| 115 |
if (nobjects != objorig+fnobjects) |
| 116 |
octerror(USER, "bad object count; octree stale?"); |
| 117 |
/* check for non-surfaces */ |
| 118 |
if (dosets(nonsurfinset)) |
| 119 |
octerror(USER, "modifier in tree; octree stale?"); |
| 120 |
} |
| 121 |
} |
| 122 |
/* close the input */ |
| 123 |
if (infn[0] == '!') |
| 124 |
pclose(infp); |
| 125 |
else |
| 126 |
fclose(infp); |
| 127 |
return(nf); |
| 128 |
} |
| 129 |
|
| 130 |
|
| 131 |
static char * |
| 132 |
ogetstr(s) /* get null-terminated string */ |
| 133 |
char *s; |
| 134 |
{ |
| 135 |
extern char *getstr(); |
| 136 |
|
| 137 |
if (getstr(s, infp) == NULL) |
| 138 |
octerror(USER, "truncated octree"); |
| 139 |
return(s); |
| 140 |
} |
| 141 |
|
| 142 |
|
| 143 |
static OCTREE |
| 144 |
getfullnode() /* get a set, return fullnode */ |
| 145 |
{ |
| 146 |
OBJECT set[MAXSET+1]; |
| 147 |
register int i; |
| 148 |
register long m; |
| 149 |
|
| 150 |
if ((set[0] = ogetint(objsize)) > MAXSET) |
| 151 |
octerror(USER, "bad set in getfullnode"); |
| 152 |
for (i = 1; i <= set[0]; i++) { |
| 153 |
m = ogetint(objsize) + objorig; |
| 154 |
if ((set[i] = m) != m) |
| 155 |
octerror(USER, "too many objects"); |
| 156 |
} |
| 157 |
return(fullnode(set)); |
| 158 |
} |
| 159 |
|
| 160 |
|
| 161 |
static long |
| 162 |
ogetint(siz) /* get a siz-byte integer */ |
| 163 |
int siz; |
| 164 |
{ |
| 165 |
extern long getint(); |
| 166 |
register long r; |
| 167 |
|
| 168 |
r = getint(siz, infp); |
| 169 |
if (feof(infp)) |
| 170 |
octerror(USER, "truncated octree"); |
| 171 |
return(r); |
| 172 |
} |
| 173 |
|
| 174 |
|
| 175 |
static double |
| 176 |
ogetflt() /* get a floating point number */ |
| 177 |
{ |
| 178 |
extern double getflt(); |
| 179 |
double r; |
| 180 |
|
| 181 |
r = getflt(infp); |
| 182 |
if (feof(infp)) |
| 183 |
octerror(USER, "truncated octree"); |
| 184 |
return(r); |
| 185 |
} |
| 186 |
|
| 187 |
|
| 188 |
static OCTREE |
| 189 |
gettree() /* get a pre-ordered octree */ |
| 190 |
{ |
| 191 |
register OCTREE ot; |
| 192 |
register int i; |
| 193 |
|
| 194 |
switch (getc(infp)) { |
| 195 |
case OT_EMPTY: |
| 196 |
return(EMPTY); |
| 197 |
case OT_FULL: |
| 198 |
return(getfullnode()); |
| 199 |
case OT_TREE: |
| 200 |
if ((ot = octalloc()) == EMPTY) |
| 201 |
octerror(SYSTEM, "out of tree space in gettree"); |
| 202 |
for (i = 0; i < 8; i++) |
| 203 |
octkid(ot, i) = gettree(); |
| 204 |
return(ot); |
| 205 |
case EOF: |
| 206 |
octerror(USER, "truncated octree"); |
| 207 |
default: |
| 208 |
octerror(USER, "damaged octree"); |
| 209 |
} |
| 210 |
return EMPTY; /* pro forma return */ |
| 211 |
} |
| 212 |
|
| 213 |
|
| 214 |
static int |
| 215 |
nonsurfinset(os) /* check set for modifier */ |
| 216 |
register OBJECT *os; |
| 217 |
{ |
| 218 |
register OBJECT s; |
| 219 |
register int i; |
| 220 |
|
| 221 |
for (i = *os; i-- > 0; ) |
| 222 |
if ((s = *++os) >= objorig && s < objorig+fnobjects && |
| 223 |
ismodifier(objptr(s)->otype)) |
| 224 |
return(1); |
| 225 |
return(0); |
| 226 |
} |
| 227 |
|
| 228 |
|
| 229 |
static void |
| 230 |
skiptree(void) /* skip octree on input */ |
| 231 |
{ |
| 232 |
register int i; |
| 233 |
|
| 234 |
switch (getc(infp)) { |
| 235 |
case OT_EMPTY: |
| 236 |
return; |
| 237 |
case OT_FULL: |
| 238 |
for (i = ogetint(objsize)*objsize; i-- > 0; ) |
| 239 |
if (getc(infp) == EOF) |
| 240 |
octerror(USER, "truncated octree"); |
| 241 |
return; |
| 242 |
case OT_TREE: |
| 243 |
for (i = 0; i < 8; i++) |
| 244 |
skiptree(); |
| 245 |
return; |
| 246 |
case EOF: |
| 247 |
octerror(USER, "truncated octree"); |
| 248 |
default: |
| 249 |
octerror(USER, "damaged octree"); |
| 250 |
} |
| 251 |
} |
| 252 |
|
| 253 |
|
| 254 |
static void |
| 255 |
octerror(etyp, msg) /* octree error */ |
| 256 |
int etyp; |
| 257 |
char *msg; |
| 258 |
{ |
| 259 |
char msgbuf[128]; |
| 260 |
|
| 261 |
sprintf(msgbuf, "(%s): %s", infn, msg); |
| 262 |
error(etyp, msgbuf); |
| 263 |
} |
