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root/radiance/ray/src/ot/oconv.c
Revision: 2.5
Committed: Fri Oct 9 10:26:28 1992 UTC (31 years, 5 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.4: +7 -7 lines
Log Message:
Changes for 32-bit PC port

File Contents

# User Rev Content
1 greg 2.4 /* Copyright (c) 1992 Regents of the University of California */
2 greg 1.1
3     #ifndef lint
4     static char SCCSid[] = "$SunId$ LBL";
5     #endif
6    
7     /*
8     * oconv.c - main program for object to octree conversion.
9     *
10     * 7/29/85
11     */
12    
13     #include "standard.h"
14    
15     #include "octree.h"
16    
17     #include "object.h"
18    
19     #include "otypes.h"
20    
21 greg 2.4 #include "paths.h"
22 greg 1.14
23 greg 2.4 #define OMARGIN (10*FTINY) /* margin around global cube */
24 greg 1.2
25 greg 2.4 #define MAXOBJFIL 63 /* maximum number of scene files */
26 greg 1.1
27     char *progname; /* argv[0] */
28    
29     char *libpath; /* library search path */
30    
31     int nowarn = 0; /* supress warnings? */
32    
33     int objlim = 5; /* # of objects before split */
34    
35     int resolu = 1024; /* octree resolution limit */
36    
37     CUBE thescene = {EMPTY, {0.0, 0.0, 0.0}, 0.0}; /* our scene */
38    
39     char *ofname[MAXOBJFIL+1]; /* object file names */
40     int nfiles = 0; /* number of object files */
41    
42 greg 2.4 double mincusize; /* minimum cube size from resolu */
43 greg 1.1
44 greg 1.7 int (*addobjnotify[])() = {NULL}; /* new object notifier functions */
45    
46 greg 1.1
47     main(argc, argv) /* convert object files to an octree */
48     int argc;
49     char **argv;
50     {
51 greg 2.2 extern char *getenv();
52 greg 1.1 FVECT bbmin, bbmax;
53     char *infile = NULL;
54     int outflags = IO_ALL;
55 greg 2.4 OBJECT startobj;
56 greg 1.1 int i;
57    
58 greg 2.5 progname = argv[0] = fixargv0(argv[0]);
59    
60 greg 2.4 if ((libpath = getenv(ULIBVAR)) == NULL)
61 greg 1.14 libpath = DEFPATH;
62 greg 1.1
63 greg 1.12 initotypes();
64    
65 greg 1.5 for (i = 1; i < argc && argv[i][0] == '-'; i++)
66 greg 1.1 switch (argv[i][1]) {
67 greg 1.5 case '\0': /* scene from stdin */
68     goto breakopt;
69 greg 1.1 case 'i': /* input octree */
70     infile = argv[++i];
71     break;
72     case 'b': /* bounding cube */
73 greg 1.2 thescene.cuorg[0] = atof(argv[++i]) - OMARGIN;
74     thescene.cuorg[1] = atof(argv[++i]) - OMARGIN;
75     thescene.cuorg[2] = atof(argv[++i]) - OMARGIN;
76     thescene.cusize = atof(argv[++i]) + 2*OMARGIN;
77 greg 1.1 break;
78     case 'n': /* set limit */
79     objlim = atoi(argv[++i]);
80     break;
81     case 'r': /* resolution limit */
82     resolu = atoi(argv[++i]);
83     break;
84     case 'f': /* freeze octree */
85     outflags &= ~IO_FILES;
86     break;
87     case 'w': /* supress warnings */
88     nowarn = 1;
89     break;
90     default:
91     sprintf(errmsg, "unknown option: '%s'", argv[i]);
92     error(USER, errmsg);
93     break;
94     }
95 greg 1.5 breakopt:
96 greg 2.4 #ifdef MSDOS
97     setmode(fileno(stdout), O_BINARY);
98     #endif
99 greg 1.1 if (infile != NULL) { /* get old octree & objects */
100     if (thescene.cusize > FTINY)
101     error(USER, "only one of '-b' or '-i'");
102     nfiles = readoct(infile, IO_ALL, &thescene, ofname);
103     if (nfiles == 0 && outflags & IO_FILES) {
104     error(WARNING, "frozen octree");
105     outflags &= ~IO_FILES;
106     }
107     }
108    
109     printargs(argc, argv, stdout); /* info. header */
110 greg 1.13 fputformat(OCTFMT, stdout);
111 greg 1.1 printf("\n");
112    
113     startobj = nobjects; /* previous objects already converted */
114 greg 2.5
115 greg 1.4 for ( ; i < argc; i++) /* read new scene descriptions */
116     if (!strcmp(argv[i], "-")) { /* from stdin */
117     readobj(NULL);
118     outflags &= ~IO_FILES;
119     } else { /* from file */
120     if (nfiles >= MAXOBJFIL)
121     error(INTERNAL, "too many scene files");
122     readobj(ofname[nfiles++] = argv[i]);
123     }
124    
125 greg 1.1 ofname[nfiles] = NULL;
126     /* find bounding box */
127     bbmin[0] = bbmin[1] = bbmin[2] = FHUGE;
128     bbmax[0] = bbmax[1] = bbmax[2] = -FHUGE;
129     for (i = startobj; i < nobjects; i++)
130     add2bbox(objptr(i), bbmin, bbmax);
131     /* set/check cube */
132     if (thescene.cusize == 0.0) {
133     if (bbmin[0] <= bbmax[0]) {
134     for (i = 0; i < 3; i++) {
135 greg 1.2 bbmin[i] -= OMARGIN;
136     bbmax[i] += OMARGIN;
137 greg 1.1 }
138     for (i = 0; i < 3; i++)
139     if (bbmax[i] - bbmin[i] > thescene.cusize)
140     thescene.cusize = bbmax[i] - bbmin[i];
141 greg 1.3 for (i = 0; i < 3; i++)
142     thescene.cuorg[i] =
143     (bbmax[i]+bbmin[i]-thescene.cusize)*.5;
144 greg 1.1 }
145     } else {
146     for (i = 0; i < 3; i++)
147     if (bbmin[i] < thescene.cuorg[i] ||
148     bbmax[i] > thescene.cuorg[i] + thescene.cusize)
149     error(USER, "boundary does not encompass scene");
150     }
151    
152     mincusize = thescene.cusize / resolu - FTINY;
153 greg 2.5
154 greg 1.1 for (i = startobj; i < nobjects; i++) /* add new objects */
155     addobject(&thescene, i);
156 greg 2.5
157 greg 1.1 thescene.cutree = combine(thescene.cutree); /* optimize */
158    
159     writeoct(outflags, &thescene, ofname); /* write structures to stdout */
160    
161     quit(0);
162     }
163    
164    
165     quit(code) /* exit program */
166     int code;
167     {
168     exit(code);
169     }
170    
171    
172     cputs() /* interactive error */
173     {
174     /* referenced, but not used */
175     }
176    
177    
178     wputs(s) /* warning message */
179     char *s;
180     {
181     if (!nowarn)
182     eputs(s);
183     }
184    
185    
186     eputs(s) /* put string to stderr */
187     register char *s;
188     {
189 greg 1.9 static int inln = 0;
190 greg 1.1
191 greg 1.9 if (!inln++) {
192 greg 1.1 fputs(progname, stderr);
193     fputs(": ", stderr);
194     }
195     fputs(s, stderr);
196     if (*s && s[strlen(s)-1] == '\n')
197 greg 1.9 inln = 0;
198 greg 1.1 }
199    
200    
201 greg 2.4 #define bitop(f,i,op) (f[((i)>>3)] op (1<<((i)&7)))
202     #define tstbit(f,i) bitop(f,i,&)
203     #define setbit(f,i) bitop(f,i,|=)
204     #define clrbit(f,i) bitop(f,i,&=~)
205     #define tglbit(f,i) bitop(f,i,^=)
206 greg 1.11
207    
208 greg 1.1 addobject(cu, obj) /* add an object to a cube */
209     register CUBE *cu;
210 greg 2.4 OBJECT obj;
211 greg 1.1 {
212     CUBE cukid;
213 greg 2.4 OCTREE ot;
214     OBJECT oset[MAXSET+1];
215 greg 2.3 unsigned char inflg[(MAXSET+7)/8], volflg[(MAXSET+7)/8];
216 greg 1.11 int in;
217 greg 1.1 register int i, j;
218    
219     in = (*ofun[objptr(obj)->otype].funp)(objptr(obj), cu);
220    
221 greg 1.6 if (in == O_MISS)
222 greg 1.1 return; /* no intersection */
223 greg 2.5
224 greg 1.1 if (istree(cu->cutree)) {
225     /* do children */
226     cukid.cusize = cu->cusize * 0.5;
227     for (i = 0; i < 8; i++) {
228     cukid.cutree = octkid(cu->cutree, i);
229     for (j = 0; j < 3; j++) {
230     cukid.cuorg[j] = cu->cuorg[j];
231     if ((1<<j) & i)
232     cukid.cuorg[j] += cukid.cusize;
233     }
234     addobject(&cukid, obj);
235     octkid(cu->cutree, i) = cukid.cutree;
236     }
237 greg 1.11 return;
238     }
239     if (isempty(cu->cutree)) {
240 greg 1.1 /* singular set */
241     oset[0] = 1; oset[1] = obj;
242     cu->cutree = fullnode(oset);
243 greg 1.11 return;
244     }
245     /* add to full node */
246     objset(oset, cu->cutree);
247     cukid.cusize = cu->cusize * 0.5;
248 greg 2.5
249 greg 1.11 if (in==O_IN || oset[0] < objlim || cukid.cusize < mincusize) {
250     /* add to set */
251     if (oset[0] >= MAXSET) {
252 greg 2.3 sprintf(errmsg, "set overflow in addobject (%s)",
253 greg 1.11 objptr(obj)->oname);
254     error(INTERNAL, errmsg);
255 greg 1.1 }
256 greg 1.11 insertelem(oset, obj);
257     cu->cutree = fullnode(oset);
258     return;
259 greg 1.1 }
260 greg 1.11 /* subdivide cube */
261     if ((ot = octalloc()) == EMPTY)
262     error(SYSTEM, "out of octree space");
263     /* mark volumes */
264     j = (oset[0]+7)>>3;
265     while (j--)
266     volflg[j] = inflg[j] = 0;
267     for (j = 1; j <= oset[0]; j++)
268     if (isvolume(objptr(oset[j])->otype)) {
269     setbit(volflg,j-1);
270     if ((*ofun[objptr(oset[j])->otype].funp)
271 greg 2.3 (objptr(oset[j]), cu) == O_IN)
272 greg 1.11 setbit(inflg,j-1);
273     }
274     /* assign subcubes */
275     for (i = 0; i < 8; i++) {
276     cukid.cutree = EMPTY;
277     for (j = 0; j < 3; j++) {
278     cukid.cuorg[j] = cu->cuorg[j];
279     if ((1<<j) & i)
280     cukid.cuorg[j] += cukid.cusize;
281     }
282     /* surfaces first */
283     for (j = 1; j <= oset[0]; j++)
284     if (!tstbit(volflg,j-1))
285     addobject(&cukid, oset[j]);
286     /* then this object */
287     addobject(&cukid, obj);
288 greg 2.3 /* then partial volumes */
289 greg 1.11 for (j = 1; j <= oset[0]; j++)
290     if (tstbit(volflg,j-1) &&
291     !tstbit(inflg,j-1))
292     addobject(&cukid, oset[j]);
293 greg 2.3 /* full volumes last */
294 greg 1.11 for (j = 1; j <= oset[0]; j++)
295     if (tstbit(inflg,j-1))
296     addobject(&cukid, oset[j]);
297     /* returned node */
298     octkid(ot, i) = cukid.cutree;
299     }
300     cu->cutree = ot;
301 greg 1.1 }