1 |
/* Copyright (c) 1992 Regents of the University of California */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ LBL"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* readoct.c - routines to read octree information. |
9 |
* |
10 |
* 7/30/85 |
11 |
*/ |
12 |
|
13 |
#include "standard.h" |
14 |
|
15 |
#include "octree.h" |
16 |
|
17 |
#include "object.h" |
18 |
|
19 |
#include "otypes.h" |
20 |
|
21 |
static double ogetflt(); |
22 |
static long ogetint(); |
23 |
static char *ogetstr(); |
24 |
static int getobj(), octerror(); |
25 |
static OCTREE getfullnode(), gettree(); |
26 |
|
27 |
static char *infn; /* input file name */ |
28 |
static FILE *infp; /* input file stream */ |
29 |
static int objsize; /* size of stored OBJECT's */ |
30 |
static OBJECT objorig; /* zeroeth object */ |
31 |
static short otypmap[NUMOTYPE+8]; /* object type map */ |
32 |
|
33 |
|
34 |
int |
35 |
readoct(fname, load, scene, ofn) /* read in octree from file */ |
36 |
char *fname; |
37 |
int load; |
38 |
CUBE *scene; |
39 |
char *ofn[]; |
40 |
{ |
41 |
extern int fputs(); |
42 |
char sbuf[512]; |
43 |
int nf; |
44 |
OBJECT fnobjects; |
45 |
register int i; |
46 |
long m; |
47 |
|
48 |
if (fname == NULL) { |
49 |
infn = "standard input"; |
50 |
infp = stdin; |
51 |
} else { |
52 |
infn = fname; |
53 |
if ((infp = fopen(fname, "r")) == NULL) { |
54 |
sprintf(errmsg, "cannot open octree file \"%s\"", |
55 |
fname); |
56 |
error(SYSTEM, errmsg); |
57 |
} |
58 |
} |
59 |
/* get header */ |
60 |
if (checkheader(infp, OCTFMT, load&IO_INFO ? stdout : NULL) < 0) |
61 |
octerror(USER, "not an octree"); |
62 |
/* check format */ |
63 |
if ((objsize = ogetint(2)-OCTMAGIC) <= 0 || |
64 |
objsize > MAXOBJSIZ || objsize > sizeof(long)) |
65 |
octerror(USER, "incompatible octree format"); |
66 |
/* get boundaries */ |
67 |
if (load & IO_BOUNDS) { |
68 |
for (i = 0; i < 3; i++) |
69 |
scene->cuorg[i] = atof(ogetstr(sbuf)); |
70 |
scene->cusize = atof(ogetstr(sbuf)); |
71 |
} else { |
72 |
for (i = 0; i < 4; i++) |
73 |
ogetstr(sbuf); |
74 |
} |
75 |
objorig = nobjects; /* set object offset */ |
76 |
nf = 0; /* get object files */ |
77 |
while (*ogetstr(sbuf)) { |
78 |
if (load & IO_SCENE) |
79 |
readobj(sbuf); |
80 |
if (load & IO_FILES) |
81 |
ofn[nf] = savqstr(sbuf); |
82 |
nf++; |
83 |
} |
84 |
if (load & IO_FILES) |
85 |
ofn[nf] = NULL; |
86 |
/* get number of objects */ |
87 |
fnobjects = m = ogetint(objsize); |
88 |
if (fnobjects != m) |
89 |
octerror(USER, "too many objects"); |
90 |
|
91 |
if (load & IO_TREE) /* get the octree */ |
92 |
scene->cutree = gettree(); |
93 |
else if (load & IO_SCENE && nf == 0) |
94 |
skiptree(); |
95 |
|
96 |
if (load & IO_SCENE) /* get the scene */ |
97 |
if (nf == 0) { |
98 |
for (i = 0; *ogetstr(sbuf); i++) |
99 |
if ((otypmap[i] = otype(sbuf)) < 0) { |
100 |
sprintf(errmsg, "unknown type \"%s\"", sbuf); |
101 |
octerror(WARNING, errmsg); |
102 |
} |
103 |
while (getobj() != OVOID) |
104 |
; |
105 |
} else { /* consistency checks */ |
106 |
/* check object count */ |
107 |
if (nobjects != objorig+fnobjects) |
108 |
octerror(USER, "bad object count; octree stale?"); |
109 |
/* check for non-surfaces */ |
110 |
if (nonsurfinset(objorig, fnobjects)) |
111 |
octerror(USER, "modifier in tree; octree stale?"); |
112 |
} |
113 |
fclose(infp); |
114 |
return(nf); |
115 |
} |
116 |
|
117 |
|
118 |
static char * |
119 |
ogetstr(s) /* get null-terminated string */ |
120 |
char *s; |
121 |
{ |
122 |
extern char *getstr(); |
123 |
|
124 |
if (getstr(s, infp) == NULL) |
125 |
octerror(USER, "truncated octree"); |
126 |
return(s); |
127 |
} |
128 |
|
129 |
|
130 |
static OCTREE |
131 |
getfullnode() /* get a set, return fullnode */ |
132 |
{ |
133 |
OBJECT set[MAXSET+1]; |
134 |
register int i; |
135 |
register long m; |
136 |
|
137 |
if ((set[0] = ogetint(objsize)) > MAXSET) |
138 |
octerror(USER, "bad set in getfullnode"); |
139 |
for (i = 1; i <= set[0]; i++) { |
140 |
m = ogetint(objsize) + objorig; |
141 |
if ((set[i] = m) != m) |
142 |
octerror(USER, "too many objects"); |
143 |
} |
144 |
return(fullnode(set)); |
145 |
} |
146 |
|
147 |
|
148 |
static long |
149 |
ogetint(siz) /* get a siz-byte integer */ |
150 |
int siz; |
151 |
{ |
152 |
extern long getint(); |
153 |
register long r; |
154 |
|
155 |
r = getint(siz, infp); |
156 |
if (feof(infp)) |
157 |
octerror(USER, "truncated octree"); |
158 |
return(r); |
159 |
} |
160 |
|
161 |
|
162 |
static double |
163 |
ogetflt() /* get a floating point number */ |
164 |
{ |
165 |
extern double getflt(); |
166 |
double r; |
167 |
|
168 |
r = getflt(infp); |
169 |
if (feof(infp)) |
170 |
octerror(USER, "truncated octree"); |
171 |
return(r); |
172 |
} |
173 |
|
174 |
|
175 |
static OCTREE |
176 |
gettree() /* get a pre-ordered octree */ |
177 |
{ |
178 |
register OCTREE ot; |
179 |
register int i; |
180 |
|
181 |
switch (getc(infp)) { |
182 |
case OT_EMPTY: |
183 |
return(EMPTY); |
184 |
case OT_FULL: |
185 |
return(getfullnode()); |
186 |
case OT_TREE: |
187 |
if ((ot = octalloc()) == EMPTY) |
188 |
octerror(SYSTEM, "out of tree space in gettree"); |
189 |
for (i = 0; i < 8; i++) |
190 |
octkid(ot, i) = gettree(); |
191 |
return(ot); |
192 |
case EOF: |
193 |
octerror(USER, "truncated octree"); |
194 |
default: |
195 |
octerror(USER, "damaged octree"); |
196 |
} |
197 |
} |
198 |
|
199 |
|
200 |
static |
201 |
skiptree() /* skip octree on input */ |
202 |
{ |
203 |
register int i; |
204 |
|
205 |
switch (getc(infp)) { |
206 |
case OT_EMPTY: |
207 |
return; |
208 |
case OT_FULL: |
209 |
for (i = ogetint(objsize); i-- > 0; ) |
210 |
ogetint(objsize); |
211 |
return; |
212 |
case OT_TREE: |
213 |
for (i = 0; i < 8; i++) |
214 |
skiptree(); |
215 |
return; |
216 |
case EOF: |
217 |
octerror(USER, "truncated octree"); |
218 |
default: |
219 |
octerror(USER, "damaged octree"); |
220 |
} |
221 |
} |
222 |
|
223 |
|
224 |
static |
225 |
getobj() /* get next object */ |
226 |
{ |
227 |
char sbuf[MAXSTR]; |
228 |
int obj; |
229 |
register int i; |
230 |
register long m; |
231 |
register OBJREC *objp; |
232 |
|
233 |
i = ogetint(1); |
234 |
if (i == -1) |
235 |
return(OVOID); /* terminator */ |
236 |
if ((obj = newobject()) == OVOID) |
237 |
error(SYSTEM, "out of object space"); |
238 |
objp = objptr(obj); |
239 |
if ((objp->otype = otypmap[i]) < 0) |
240 |
octerror(USER, "reference to unknown type"); |
241 |
if ((m = ogetint(objsize)) != OVOID) { |
242 |
m += objorig; |
243 |
if ((OBJECT)m != m) |
244 |
octerror(USER, "too many objects"); |
245 |
} |
246 |
objp->omod = m; |
247 |
objp->oname = savqstr(ogetstr(sbuf)); |
248 |
if (objp->oargs.nsargs = ogetint(2)) { |
249 |
objp->oargs.sarg = (char **)bmalloc |
250 |
(objp->oargs.nsargs*sizeof(char *)); |
251 |
if (objp->oargs.sarg == NULL) |
252 |
goto memerr; |
253 |
for (i = 0; i < objp->oargs.nsargs; i++) |
254 |
objp->oargs.sarg[i] = savestr(ogetstr(sbuf)); |
255 |
} else |
256 |
objp->oargs.sarg = NULL; |
257 |
#ifdef IARGS |
258 |
if (objp->oargs.niargs = ogetint(2)) { |
259 |
objp->oargs.iarg = (long *)bmalloc |
260 |
(objp->oargs.niargs*sizeof(long)); |
261 |
if (objp->oargs.iarg == NULL) |
262 |
goto memerr; |
263 |
for (i = 0; i < objp->oargs.niargs; i++) |
264 |
objp->oargs.iarg[i] = ogetint(4); |
265 |
} else |
266 |
objp->oargs.iarg = NULL; |
267 |
#endif |
268 |
if (objp->oargs.nfargs = ogetint(2)) { |
269 |
objp->oargs.farg = (FLOAT *)bmalloc |
270 |
(objp->oargs.nfargs*sizeof(FLOAT)); |
271 |
if (objp->oargs.farg == NULL) |
272 |
goto memerr; |
273 |
for (i = 0; i < objp->oargs.nfargs; i++) |
274 |
objp->oargs.farg[i] = ogetflt(); |
275 |
} else |
276 |
objp->oargs.farg = NULL; |
277 |
/* initialize */ |
278 |
objp->os = NULL; |
279 |
objp->lastrno = -1; |
280 |
/* insert */ |
281 |
insertobject(obj); |
282 |
return(obj); |
283 |
memerr: |
284 |
error(SYSTEM, "out of memory in getobj"); |
285 |
} |
286 |
|
287 |
|
288 |
static |
289 |
octerror(etyp, msg) /* octree error */ |
290 |
int etyp; |
291 |
char *msg; |
292 |
{ |
293 |
char msgbuf[128]; |
294 |
|
295 |
sprintf(msgbuf, "(%s): %s", infn, msg); |
296 |
error(etyp, msgbuf); |
297 |
} |