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root/radiance/ray/src/ot/oconv.c
Revision: 2.7
Committed: Sun Feb 27 10:16:42 1994 UTC (30 years, 1 month ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.6: +2 -1 lines
Log Message:
Added new ID to first line of header and changed use of formatval

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 greg 2.6 int inpfrozen = 0;
55 greg 1.1 int outflags = IO_ALL;
56 greg 2.4 OBJECT startobj;
57 greg 1.1 int i;
58    
59 greg 2.5 progname = argv[0] = fixargv0(argv[0]);
60    
61 greg 2.4 if ((libpath = getenv(ULIBVAR)) == NULL)
62 greg 1.14 libpath = DEFPATH;
63 greg 1.1
64 greg 1.12 initotypes();
65    
66 greg 1.5 for (i = 1; i < argc && argv[i][0] == '-'; i++)
67 greg 1.1 switch (argv[i][1]) {
68 greg 1.5 case '\0': /* scene from stdin */
69 greg 2.6 outflags &= ~IO_FILES;
70 greg 1.5 goto breakopt;
71 greg 1.1 case 'i': /* input octree */
72     infile = argv[++i];
73     break;
74     case 'b': /* bounding cube */
75 greg 1.2 thescene.cuorg[0] = atof(argv[++i]) - OMARGIN;
76     thescene.cuorg[1] = atof(argv[++i]) - OMARGIN;
77     thescene.cuorg[2] = atof(argv[++i]) - OMARGIN;
78     thescene.cusize = atof(argv[++i]) + 2*OMARGIN;
79 greg 1.1 break;
80     case 'n': /* set limit */
81     objlim = atoi(argv[++i]);
82     break;
83     case 'r': /* resolution limit */
84     resolu = atoi(argv[++i]);
85     break;
86     case 'f': /* freeze octree */
87     outflags &= ~IO_FILES;
88     break;
89     case 'w': /* supress warnings */
90     nowarn = 1;
91     break;
92     default:
93     sprintf(errmsg, "unknown option: '%s'", argv[i]);
94     error(USER, errmsg);
95     break;
96     }
97 greg 1.5 breakopt:
98 greg 2.4 #ifdef MSDOS
99     setmode(fileno(stdout), O_BINARY);
100     #endif
101 greg 1.1 if (infile != NULL) { /* get old octree & objects */
102     if (thescene.cusize > FTINY)
103     error(USER, "only one of '-b' or '-i'");
104     nfiles = readoct(infile, IO_ALL, &thescene, ofname);
105 greg 2.6 if (nfiles == 0)
106     inpfrozen++;
107 greg 1.1 }
108    
109 greg 2.7 newheader("RADIANCE", stdout); /* new binary file header */
110     printargs(argc, argv, stdout);
111 greg 1.13 fputformat(OCTFMT, stdout);
112 greg 1.1 printf("\n");
113    
114     startobj = nobjects; /* previous objects already converted */
115 greg 2.5
116 greg 1.4 for ( ; i < argc; i++) /* read new scene descriptions */
117     if (!strcmp(argv[i], "-")) { /* from stdin */
118     readobj(NULL);
119     outflags &= ~IO_FILES;
120     } else { /* from file */
121     if (nfiles >= MAXOBJFIL)
122     error(INTERNAL, "too many scene files");
123     readobj(ofname[nfiles++] = argv[i]);
124     }
125    
126 greg 1.1 ofname[nfiles] = NULL;
127 greg 2.6
128     if (inpfrozen && outflags & IO_FILES) {
129     error(WARNING, "frozen octree");
130     outflags &= ~IO_FILES;
131     }
132 greg 1.1 /* find bounding box */
133     bbmin[0] = bbmin[1] = bbmin[2] = FHUGE;
134     bbmax[0] = bbmax[1] = bbmax[2] = -FHUGE;
135     for (i = startobj; i < nobjects; i++)
136     add2bbox(objptr(i), bbmin, bbmax);
137     /* set/check cube */
138     if (thescene.cusize == 0.0) {
139     if (bbmin[0] <= bbmax[0]) {
140     for (i = 0; i < 3; i++) {
141 greg 1.2 bbmin[i] -= OMARGIN;
142     bbmax[i] += OMARGIN;
143 greg 1.1 }
144     for (i = 0; i < 3; i++)
145     if (bbmax[i] - bbmin[i] > thescene.cusize)
146     thescene.cusize = bbmax[i] - bbmin[i];
147 greg 1.3 for (i = 0; i < 3; i++)
148     thescene.cuorg[i] =
149     (bbmax[i]+bbmin[i]-thescene.cusize)*.5;
150 greg 1.1 }
151     } else {
152     for (i = 0; i < 3; i++)
153     if (bbmin[i] < thescene.cuorg[i] ||
154     bbmax[i] > thescene.cuorg[i] + thescene.cusize)
155     error(USER, "boundary does not encompass scene");
156     }
157    
158     mincusize = thescene.cusize / resolu - FTINY;
159 greg 2.5
160 greg 1.1 for (i = startobj; i < nobjects; i++) /* add new objects */
161     addobject(&thescene, i);
162 greg 2.5
163 greg 1.1 thescene.cutree = combine(thescene.cutree); /* optimize */
164    
165     writeoct(outflags, &thescene, ofname); /* write structures to stdout */
166    
167     quit(0);
168     }
169    
170    
171     quit(code) /* exit program */
172     int code;
173     {
174     exit(code);
175     }
176    
177    
178     cputs() /* interactive error */
179     {
180     /* referenced, but not used */
181     }
182    
183    
184     wputs(s) /* warning message */
185     char *s;
186     {
187     if (!nowarn)
188     eputs(s);
189     }
190    
191    
192     eputs(s) /* put string to stderr */
193     register char *s;
194     {
195 greg 1.9 static int inln = 0;
196 greg 1.1
197 greg 1.9 if (!inln++) {
198 greg 1.1 fputs(progname, stderr);
199     fputs(": ", stderr);
200     }
201     fputs(s, stderr);
202     if (*s && s[strlen(s)-1] == '\n')
203 greg 1.9 inln = 0;
204 greg 1.1 }
205    
206    
207 greg 2.4 #define bitop(f,i,op) (f[((i)>>3)] op (1<<((i)&7)))
208     #define tstbit(f,i) bitop(f,i,&)
209     #define setbit(f,i) bitop(f,i,|=)
210     #define clrbit(f,i) bitop(f,i,&=~)
211     #define tglbit(f,i) bitop(f,i,^=)
212 greg 1.11
213    
214 greg 1.1 addobject(cu, obj) /* add an object to a cube */
215     register CUBE *cu;
216 greg 2.4 OBJECT obj;
217 greg 1.1 {
218     CUBE cukid;
219 greg 2.4 OCTREE ot;
220     OBJECT oset[MAXSET+1];
221 greg 2.3 unsigned char inflg[(MAXSET+7)/8], volflg[(MAXSET+7)/8];
222 greg 1.11 int in;
223 greg 1.1 register int i, j;
224    
225     in = (*ofun[objptr(obj)->otype].funp)(objptr(obj), cu);
226    
227 greg 1.6 if (in == O_MISS)
228 greg 1.1 return; /* no intersection */
229 greg 2.5
230 greg 1.1 if (istree(cu->cutree)) {
231     /* do children */
232     cukid.cusize = cu->cusize * 0.5;
233     for (i = 0; i < 8; i++) {
234     cukid.cutree = octkid(cu->cutree, i);
235     for (j = 0; j < 3; j++) {
236     cukid.cuorg[j] = cu->cuorg[j];
237     if ((1<<j) & i)
238     cukid.cuorg[j] += cukid.cusize;
239     }
240     addobject(&cukid, obj);
241     octkid(cu->cutree, i) = cukid.cutree;
242     }
243 greg 1.11 return;
244     }
245     if (isempty(cu->cutree)) {
246 greg 1.1 /* singular set */
247     oset[0] = 1; oset[1] = obj;
248     cu->cutree = fullnode(oset);
249 greg 1.11 return;
250     }
251     /* add to full node */
252     objset(oset, cu->cutree);
253     cukid.cusize = cu->cusize * 0.5;
254 greg 2.5
255 greg 1.11 if (in==O_IN || oset[0] < objlim || cukid.cusize < mincusize) {
256     /* add to set */
257     if (oset[0] >= MAXSET) {
258 greg 2.3 sprintf(errmsg, "set overflow in addobject (%s)",
259 greg 1.11 objptr(obj)->oname);
260     error(INTERNAL, errmsg);
261 greg 1.1 }
262 greg 1.11 insertelem(oset, obj);
263     cu->cutree = fullnode(oset);
264     return;
265 greg 1.1 }
266 greg 1.11 /* subdivide cube */
267     if ((ot = octalloc()) == EMPTY)
268     error(SYSTEM, "out of octree space");
269     /* mark volumes */
270     j = (oset[0]+7)>>3;
271     while (j--)
272     volflg[j] = inflg[j] = 0;
273     for (j = 1; j <= oset[0]; j++)
274     if (isvolume(objptr(oset[j])->otype)) {
275     setbit(volflg,j-1);
276     if ((*ofun[objptr(oset[j])->otype].funp)
277 greg 2.3 (objptr(oset[j]), cu) == O_IN)
278 greg 1.11 setbit(inflg,j-1);
279     }
280     /* assign subcubes */
281     for (i = 0; i < 8; i++) {
282     cukid.cutree = EMPTY;
283     for (j = 0; j < 3; j++) {
284     cukid.cuorg[j] = cu->cuorg[j];
285     if ((1<<j) & i)
286     cukid.cuorg[j] += cukid.cusize;
287     }
288     /* surfaces first */
289     for (j = 1; j <= oset[0]; j++)
290     if (!tstbit(volflg,j-1))
291     addobject(&cukid, oset[j]);
292     /* then this object */
293     addobject(&cukid, obj);
294 greg 2.3 /* then partial volumes */
295 greg 1.11 for (j = 1; j <= oset[0]; j++)
296     if (tstbit(volflg,j-1) &&
297     !tstbit(inflg,j-1))
298     addobject(&cukid, oset[j]);
299 greg 2.3 /* full volumes last */
300 greg 1.11 for (j = 1; j <= oset[0]; j++)
301     if (tstbit(inflg,j-1))
302     addobject(&cukid, oset[j]);
303     /* returned node */
304     octkid(ot, i) = cukid.cutree;
305     }
306     cu->cutree = ot;
307 greg 1.1 }