1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: rglinst.c,v 3.12 2003/07/21 22:30:17 schorsch Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Routines for reading instances and converting to OpenGL. |
6 |
*/ |
7 |
|
8 |
#include "copyright.h" |
9 |
|
10 |
#include <stdio.h> |
11 |
#include <string.h> |
12 |
#include <time.h> |
13 |
|
14 |
#include "platform.h" |
15 |
#include "paths.h" |
16 |
#include "resolu.h" |
17 |
#include "radogl.h" |
18 |
#include "octree.h" |
19 |
|
20 |
#define MAXLEVEL 16 /* maximum instance hierarchy level */ |
21 |
|
22 |
typedef struct { |
23 |
int listid; /* our list id */ |
24 |
short localmatl; /* uses local material only */ |
25 |
FVECT cent; /* center of octree cube */ |
26 |
char octfile[256]; /* octree file path */ |
27 |
} OCTINST; /* octree to instantiate */ |
28 |
|
29 |
static double ogetflt(void); |
30 |
static long ogetint(int); |
31 |
static char *ogetstr(char *); |
32 |
static int loadobj(void); |
33 |
static void skiptree(void); |
34 |
static void octerror(int etyp, char *msg); |
35 |
static OCTINST *getoct(char *); |
36 |
|
37 |
static char *infn; /* input file name */ |
38 |
static FILE *infp; /* input file stream */ |
39 |
static int objsize; /* size of stored OBJECT's */ |
40 |
static short otypmap[NUMOTYPE+8]; /* object type map */ |
41 |
|
42 |
static unsigned long imhash(mod) char *mod; {return((unsigned long)mod);} |
43 |
static LUTAB imtab = {imhash,NULL,NULL,NULL,0,NULL,0}; |
44 |
|
45 |
static LUTAB ottab = LU_SINIT(free,free); |
46 |
|
47 |
|
48 |
int |
49 |
o_instance(o) /* convert instance to list call */ |
50 |
register OBJREC *o; |
51 |
{ |
52 |
XF xfs; |
53 |
register OCTINST *ot; |
54 |
/* set up */ |
55 |
if (o->oargs.nsargs < 1) |
56 |
objerror(o, USER, "missing octree"); |
57 |
setmaterial(NULL, NULL, 0); |
58 |
/* put out transform (if any) */ |
59 |
if (o->oargs.nsargs > 1) { |
60 |
if (xf(&xfs, o->oargs.nsargs-1, o->oargs.sarg+1) != |
61 |
o->oargs.nsargs-1) |
62 |
objerror(o, USER, "bad transform"); |
63 |
glPushAttrib(GL_TRANSFORM_BIT); |
64 |
if ((xfs.sca < 1.-FTINY) | (xfs.sca > 1.+FTINY)) |
65 |
glEnable(GL_NORMALIZE); |
66 |
glMatrixMode(GL_MODELVIEW); |
67 |
glPushMatrix(); |
68 |
/* matrix order works out to same */ |
69 |
#ifdef SMLFLT |
70 |
glMultMatrixf((GLfloat *)xfs.xfm); |
71 |
#else |
72 |
glMultMatrixd((GLdouble *)xfs.xfm); |
73 |
#endif |
74 |
} |
75 |
ot = getoct(o->oargs.sarg[0]); /* get octree reference */ |
76 |
if (ot->localmatl &= o->os != NULL) /* set material */ |
77 |
setmaterial((MATREC *)o->os, ot->cent, 0); |
78 |
/* call the assigned list */ |
79 |
glCallList(ot->listid); |
80 |
|
81 |
if (o->oargs.nsargs > 1) { /* end transform */ |
82 |
glMatrixMode(GL_MODELVIEW); |
83 |
glPopMatrix(); |
84 |
glPopAttrib(); |
85 |
} |
86 |
rgl_checkerr("creating instance"); |
87 |
return(0); |
88 |
} |
89 |
|
90 |
|
91 |
static int |
92 |
buildoctlist(lp) /* build octree list */ |
93 |
LUENT *lp; |
94 |
{ |
95 |
int old_dolights = dolights, old_domats = domats; |
96 |
register OCTINST *op = (OCTINST *)lp->data; |
97 |
|
98 |
domats = !op->localmatl; /* do materials only if needed */ |
99 |
dolights = 0; /* never do light sources */ |
100 |
glNewList(op->listid, GL_COMPILE); |
101 |
loadoct(op->octfile); /* load objects into display list */ |
102 |
surfclean(); /* clean up */ |
103 |
glEndList(); |
104 |
dolights = old_dolights; /* restore */ |
105 |
domats = old_domats; |
106 |
return(1); /* return success */ |
107 |
} |
108 |
|
109 |
|
110 |
int |
111 |
loadoctrees() /* load octrees we've saved up */ |
112 |
{ |
113 |
int levelsleft = MAXLEVEL; |
114 |
int nocts = 0; |
115 |
LUTAB looptab; |
116 |
/* loop through new octree references */ |
117 |
while (ottab.tsiz) { |
118 |
if (!levelsleft--) |
119 |
error(USER, "too many octree levels -- instance loop?"); |
120 |
looptab = ottab; |
121 |
ottab.tsiz = 0; |
122 |
nocts += lu_doall(&looptab, buildoctlist); |
123 |
lu_done(&looptab); |
124 |
} |
125 |
return(nocts); |
126 |
} |
127 |
|
128 |
|
129 |
static OCTINST * |
130 |
getoct(name) /* get/assign octree list id */ |
131 |
char *name; |
132 |
{ |
133 |
char *path; |
134 |
register LUENT *lp; |
135 |
register OCTINST *op; |
136 |
|
137 |
if ((lp = lu_find(&ottab, name)) == NULL) |
138 |
goto memerr; |
139 |
if (lp->key == NULL) { |
140 |
lp->key = (char *)malloc(strlen(name)+1); |
141 |
if (lp->key == NULL) |
142 |
goto memerr; |
143 |
strcpy(lp->key, name); |
144 |
} |
145 |
if ((op = (OCTINST *)lp->data) == NULL) { |
146 |
path = getpath(name, getrlibpath(), R_OK); |
147 |
if (path == NULL) { |
148 |
sprintf(errmsg, "cannot find octree \"%s\"", name); |
149 |
error(USER, errmsg); |
150 |
} |
151 |
op = (OCTINST *)(lp->data = (char *)malloc(sizeof(OCTINST))); |
152 |
strcpy(op->octfile, path); |
153 |
checkoct(op->octfile, op->cent); |
154 |
op->listid = newglist(); |
155 |
op->localmatl = ~0; |
156 |
} |
157 |
return(op); |
158 |
memerr: |
159 |
error(SYSTEM, "out of memory in getoct"); |
160 |
return NULL; /* pro forma return */ |
161 |
} |
162 |
|
163 |
|
164 |
double |
165 |
checkoct(fname, cent) /* check octree file for validity */ |
166 |
char *fname; |
167 |
FVECT cent; |
168 |
{ |
169 |
char sbuf[64]; |
170 |
FILE *fp = infp; |
171 |
char *fn = infn; |
172 |
double siz = 0.; |
173 |
register int i; |
174 |
|
175 |
if ((infp = fopen(infn=fname, "r")) == NULL) { |
176 |
sprintf(errmsg, "cannot open octree file \"%s\"", fname); |
177 |
error(SYSTEM, errmsg); |
178 |
} |
179 |
SET_FILE_BINARY(infp); |
180 |
/* get header */ |
181 |
if (checkheader(infp, OCTFMT, NULL) < 0) |
182 |
octerror(USER, "not an octree"); |
183 |
/* check format */ |
184 |
if ((objsize = ogetint(2)-OCTMAGIC) <= 0 || |
185 |
objsize > MAXOBJSIZ || objsize > sizeof(long)) |
186 |
octerror(USER, "incompatible octree format"); |
187 |
if (cent != NULL) { /* get boundaries (compute center) */ |
188 |
for (i = 0; i < 3; i++) |
189 |
cent[i] = atof(ogetstr(sbuf)); |
190 |
siz = atof(ogetstr(sbuf))*.5; |
191 |
cent[0] += siz; cent[1] += siz; cent[2] += siz; |
192 |
} else { /* get size (radius) only */ |
193 |
for (i = 0; i < 3; i++) |
194 |
ogetstr(sbuf); |
195 |
siz = atof(ogetstr(sbuf))*.5; |
196 |
} |
197 |
fclose(infp); |
198 |
infp = fp; |
199 |
infn = fn; |
200 |
return(siz); |
201 |
} |
202 |
|
203 |
|
204 |
int |
205 |
loadoct(fname) /* read in objects from octree */ |
206 |
char *fname; |
207 |
{ |
208 |
OBJECT fnobjects; |
209 |
char sbuf[256]; |
210 |
int nf; |
211 |
register int i; |
212 |
long m; |
213 |
|
214 |
infn = fname; |
215 |
infp = fopen(fname, "r"); /* assume already checked */ |
216 |
SET_FILE_BINARY(infp); |
217 |
/* skip header */ |
218 |
getheader(infp, NULL, NULL); |
219 |
/* get format */ |
220 |
objsize = ogetint(2)-OCTMAGIC; |
221 |
/* skip boundaries */ |
222 |
for (i = 0; i < 4; i++) |
223 |
ogetstr(sbuf); |
224 |
nf = 0; /* load object files */ |
225 |
while (*ogetstr(sbuf)) { |
226 |
rgl_load(sbuf); |
227 |
nf++; |
228 |
} |
229 |
/* get number of objects */ |
230 |
fnobjects = m = ogetint(objsize); |
231 |
if (fnobjects != m) |
232 |
octerror(USER, "too many objects"); |
233 |
|
234 |
if (nf == 0) { |
235 |
skiptree(); |
236 |
for (i = 0; *ogetstr(sbuf); i++) |
237 |
if ((otypmap[i] = otype(sbuf)) < 0) { |
238 |
sprintf(errmsg, "unknown type \"%s\"", sbuf); |
239 |
octerror(WARNING, errmsg); |
240 |
} |
241 |
lu_init(&imtab, 1000); nobjects = 0; |
242 |
while (loadobj() != OVOID) |
243 |
; |
244 |
lu_done(&imtab); |
245 |
if (nobjects != fnobjects) |
246 |
octerror(USER, "inconsistent object count"); |
247 |
} |
248 |
fclose(infp); |
249 |
return(nf); |
250 |
} |
251 |
|
252 |
|
253 |
static char * |
254 |
ogetstr(s) /* get null-terminated string */ |
255 |
char *s; |
256 |
{ |
257 |
extern char *getstr(); |
258 |
|
259 |
if (getstr(s, infp) == NULL) |
260 |
octerror(USER, "truncated octree"); |
261 |
return(s); |
262 |
} |
263 |
|
264 |
|
265 |
static long |
266 |
ogetint(siz) /* get a siz-byte integer */ |
267 |
int siz; |
268 |
{ |
269 |
extern long getint(); |
270 |
register long r; |
271 |
|
272 |
r = getint(siz, infp); |
273 |
if (feof(infp)) |
274 |
octerror(USER, "truncated octree"); |
275 |
return(r); |
276 |
} |
277 |
|
278 |
|
279 |
static double |
280 |
ogetflt() /* get a floating point number */ |
281 |
{ |
282 |
extern double getflt(); |
283 |
double r; |
284 |
|
285 |
r = getflt(infp); |
286 |
if (feof(infp)) |
287 |
octerror(USER, "truncated octree"); |
288 |
return(r); |
289 |
} |
290 |
|
291 |
|
292 |
static void |
293 |
skiptree() /* skip octree on input */ |
294 |
{ |
295 |
register int i; |
296 |
|
297 |
switch (getc(infp)) { |
298 |
case OT_EMPTY: |
299 |
return; |
300 |
case OT_FULL: |
301 |
for (i = ogetint(objsize)*objsize; i-- > 0; ) |
302 |
if (getc(infp) == EOF) |
303 |
octerror(USER, "truncated octree"); |
304 |
return; |
305 |
case OT_TREE: |
306 |
for (i = 0; i < 8; i++) |
307 |
skiptree(); |
308 |
return; |
309 |
case EOF: |
310 |
octerror(USER, "truncated octree"); |
311 |
default: |
312 |
octerror(USER, "damaged octree"); |
313 |
} |
314 |
} |
315 |
|
316 |
|
317 |
static int |
318 |
loadobj() /* get next object */ |
319 |
{ |
320 |
static OBJREC ob; |
321 |
char idbuf[MAXSTR], sbuf[MAXSTR]; |
322 |
register LUENT *lep; |
323 |
register int i; |
324 |
register long m; |
325 |
/* get type */ |
326 |
i = ogetint(1); |
327 |
if (i == -1) |
328 |
return(OVOID); /* terminator */ |
329 |
if ((ob.otype = otypmap[i]) < 0) |
330 |
octerror(USER, "reference to unknown type"); |
331 |
/* get modifier */ |
332 |
if ((m = ogetint(objsize)) != OVOID && (OBJECT)m != m) |
333 |
octerror(USER, "too many objects"); |
334 |
if ((ob.omod = m) != OVOID && domats) { |
335 |
if ((lep = lu_find(&imtab, (char *)m)) == NULL) |
336 |
goto memerr; |
337 |
ob.os = lep->data; |
338 |
} else |
339 |
ob.os = NULL; |
340 |
/* get name id */ |
341 |
ob.oname = ogetstr(idbuf); |
342 |
/* get string arguments */ |
343 |
if ((ob.oargs.nsargs = ogetint(2))) { |
344 |
ob.oargs.sarg = (char **)malloc |
345 |
(ob.oargs.nsargs*sizeof(char *)); |
346 |
if (ob.oargs.sarg == NULL) |
347 |
goto memerr; |
348 |
for (i = 0; i < ob.oargs.nsargs; i++) |
349 |
ob.oargs.sarg[i] = savestr(ogetstr(sbuf)); |
350 |
} else |
351 |
ob.oargs.sarg = NULL; |
352 |
/* get integer arguments */ |
353 |
#ifdef IARGS |
354 |
if (ob.oargs.niargs = ogetint(2)) { |
355 |
ob.oargs.iarg = (long *)malloc |
356 |
(ob.oargs.niargs*sizeof(long)); |
357 |
if (ob.oargs.iarg == NULL) |
358 |
goto memerr; |
359 |
for (i = 0; i < ob.oargs.niargs; i++) |
360 |
ob.oargs.iarg[i] = ogetint(4); |
361 |
} else |
362 |
ob.oargs.iarg = NULL; |
363 |
#endif |
364 |
/* get real arguments */ |
365 |
if ((ob.oargs.nfargs = ogetint(2))) { |
366 |
ob.oargs.farg = (RREAL *)malloc |
367 |
(ob.oargs.nfargs*sizeof(RREAL)); |
368 |
if (ob.oargs.farg == NULL) |
369 |
goto memerr; |
370 |
for (i = 0; i < ob.oargs.nfargs; i++) |
371 |
ob.oargs.farg[i] = ogetflt(); |
372 |
} else |
373 |
ob.oargs.farg = NULL; |
374 |
/* process object */ |
375 |
(*ofun[ob.otype].funp)(&ob); |
376 |
/* record material if modifier */ |
377 |
if (ismodifier(ob.otype)) { |
378 |
if ((lep = lu_find(&imtab, (char *)nobjects)) == NULL) |
379 |
goto memerr; |
380 |
lep->key = (char *)nobjects; |
381 |
lep->data = (char *)getmatp(ob.oname); |
382 |
} |
383 |
freefargs(&ob.oargs); /* free arguments */ |
384 |
return(nobjects++); /* return object id */ |
385 |
memerr: |
386 |
error(SYSTEM, "out of memory in loadobj"); |
387 |
return OVOID; /* pro forma return */ |
388 |
} |
389 |
|
390 |
|
391 |
static void |
392 |
octerror(etyp, msg) /* octree error */ |
393 |
int etyp; |
394 |
char *msg; |
395 |
{ |
396 |
char msgbuf[128]; |
397 |
|
398 |
sprintf(msgbuf, "(%s): %s", infn, msg); |
399 |
error(etyp, msgbuf); |
400 |
} |