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root/radiance/ray/src/ot/oconv.c
Revision: 1.4
Committed: Thu Jun 1 19:23:13 1989 UTC (34 years, 10 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 1.3: +12 -7 lines
Log Message:
Added ability to read scene from stdin

File Contents

# User Rev Content
1 greg 1.1 /* Copyright (c) 1986 Regents of the University of California */
2    
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 1.2 #define OMARGIN (10*FTINY) /* margin around global cube */
22    
23 greg 1.1 #define MAXOBJFIL 63 /* maximum number of scene files */
24    
25     char *progname; /* argv[0] */
26    
27     char *libpath; /* library search path */
28    
29     int nowarn = 0; /* supress warnings? */
30    
31     int objlim = 5; /* # of objects before split */
32    
33     int resolu = 1024; /* octree resolution limit */
34    
35     CUBE thescene = {EMPTY, {0.0, 0.0, 0.0}, 0.0}; /* our scene */
36    
37     char *ofname[MAXOBJFIL+1]; /* object file names */
38     int nfiles = 0; /* number of object files */
39    
40     double mincusize; /* minimum cube size from resolu */
41    
42    
43     main(argc, argv) /* convert object files to an octree */
44     int argc;
45     char **argv;
46     {
47     char *getenv();
48     double atof();
49     FVECT bbmin, bbmax;
50     char *infile = NULL;
51     int outflags = IO_ALL;
52     OBJECT startobj;
53     int i;
54    
55     progname = argv[0];
56    
57     if ((libpath = getenv("RAYPATH")) == NULL)
58     libpath = ":/usr/local/lib/ray";
59    
60 greg 1.4 for (i = 1; i < argc && argv[i][0] == '-' && argv[i][1]; i++)
61 greg 1.1 switch (argv[i][1]) {
62     case 'i': /* input octree */
63     infile = argv[++i];
64     break;
65     case 'b': /* bounding cube */
66 greg 1.2 thescene.cuorg[0] = atof(argv[++i]) - OMARGIN;
67     thescene.cuorg[1] = atof(argv[++i]) - OMARGIN;
68     thescene.cuorg[2] = atof(argv[++i]) - OMARGIN;
69     thescene.cusize = atof(argv[++i]) + 2*OMARGIN;
70 greg 1.1 break;
71     case 'n': /* set limit */
72     objlim = atoi(argv[++i]);
73     break;
74     case 'r': /* resolution limit */
75     resolu = atoi(argv[++i]);
76     break;
77     case 'f': /* freeze octree */
78     outflags &= ~IO_FILES;
79     break;
80     case 'w': /* supress warnings */
81     nowarn = 1;
82     break;
83     default:
84     sprintf(errmsg, "unknown option: '%s'", argv[i]);
85     error(USER, errmsg);
86     break;
87     }
88 greg 1.4
89 greg 1.1 if (infile != NULL) { /* get old octree & objects */
90     if (thescene.cusize > FTINY)
91     error(USER, "only one of '-b' or '-i'");
92     nfiles = readoct(infile, IO_ALL, &thescene, ofname);
93     if (nfiles == 0 && outflags & IO_FILES) {
94     error(WARNING, "frozen octree");
95     outflags &= ~IO_FILES;
96     }
97     }
98    
99     printargs(argc, argv, stdout); /* info. header */
100     printf("\n");
101    
102     startobj = nobjects; /* previous objects already converted */
103    
104 greg 1.4 for ( ; i < argc; i++) /* read new scene descriptions */
105     if (!strcmp(argv[i], "-")) { /* from stdin */
106     readobj(NULL);
107     outflags &= ~IO_FILES;
108     } else { /* from file */
109     if (nfiles >= MAXOBJFIL)
110     error(INTERNAL, "too many scene files");
111     readobj(ofname[nfiles++] = argv[i]);
112     }
113    
114 greg 1.1 ofname[nfiles] = NULL;
115     /* find bounding box */
116     bbmin[0] = bbmin[1] = bbmin[2] = FHUGE;
117     bbmax[0] = bbmax[1] = bbmax[2] = -FHUGE;
118     for (i = startobj; i < nobjects; i++)
119     add2bbox(objptr(i), bbmin, bbmax);
120     /* set/check cube */
121     if (thescene.cusize == 0.0) {
122     if (bbmin[0] <= bbmax[0]) {
123     for (i = 0; i < 3; i++) {
124 greg 1.2 bbmin[i] -= OMARGIN;
125     bbmax[i] += OMARGIN;
126 greg 1.1 }
127     for (i = 0; i < 3; i++)
128     if (bbmax[i] - bbmin[i] > thescene.cusize)
129     thescene.cusize = bbmax[i] - bbmin[i];
130 greg 1.3 for (i = 0; i < 3; i++)
131     thescene.cuorg[i] =
132     (bbmax[i]+bbmin[i]-thescene.cusize)*.5;
133 greg 1.1 }
134     } else {
135     for (i = 0; i < 3; i++)
136     if (bbmin[i] < thescene.cuorg[i] ||
137     bbmax[i] > thescene.cuorg[i] + thescene.cusize)
138     error(USER, "boundary does not encompass scene");
139     }
140    
141     mincusize = thescene.cusize / resolu - FTINY;
142    
143     for (i = startobj; i < nobjects; i++) /* add new objects */
144     addobject(&thescene, i);
145    
146     thescene.cutree = combine(thescene.cutree); /* optimize */
147    
148     writeoct(outflags, &thescene, ofname); /* write structures to stdout */
149    
150     quit(0);
151     }
152    
153    
154     quit(code) /* exit program */
155     int code;
156     {
157     exit(code);
158     }
159    
160    
161     cputs() /* interactive error */
162     {
163     /* referenced, but not used */
164     }
165    
166    
167     wputs(s) /* warning message */
168     char *s;
169     {
170     if (!nowarn)
171     eputs(s);
172     }
173    
174    
175     eputs(s) /* put string to stderr */
176     register char *s;
177     {
178     static int inline = 0;
179    
180     if (!inline++) {
181     fputs(progname, stderr);
182     fputs(": ", stderr);
183     }
184     fputs(s, stderr);
185     if (*s && s[strlen(s)-1] == '\n')
186     inline = 0;
187     }
188    
189    
190     addobject(cu, obj) /* add an object to a cube */
191     register CUBE *cu;
192     OBJECT obj;
193     {
194     CUBE cukid;
195     OCTREE ot;
196     OBJECT oset[MAXSET+1];
197     int in;
198     register int i, j;
199    
200     in = (*ofun[objptr(obj)->otype].funp)(objptr(obj), cu);
201    
202     if (!in)
203     return; /* no intersection */
204    
205     if (istree(cu->cutree)) {
206     /* do children */
207     cukid.cusize = cu->cusize * 0.5;
208     for (i = 0; i < 8; i++) {
209     cukid.cutree = octkid(cu->cutree, i);
210     for (j = 0; j < 3; j++) {
211     cukid.cuorg[j] = cu->cuorg[j];
212     if ((1<<j) & i)
213     cukid.cuorg[j] += cukid.cusize;
214     }
215     addobject(&cukid, obj);
216     octkid(cu->cutree, i) = cukid.cutree;
217     }
218    
219     } else if (isempty(cu->cutree)) {
220     /* singular set */
221     oset[0] = 1; oset[1] = obj;
222     cu->cutree = fullnode(oset);
223    
224     } else {
225     /* add to full node */
226     objset(oset, cu->cutree);
227     cukid.cusize = cu->cusize * 0.5;
228    
229     if (in == 2 || oset[0] < objlim || cukid.cusize < mincusize) {
230     /* add to set */
231     if (oset[0] >= MAXSET) {
232     sprintf(errmsg,
233     "set overflow in addobject (%s)",
234     objptr(obj)->oname);
235     error(INTERNAL, errmsg);
236     }
237     insertelem(oset, obj);
238     cu->cutree = fullnode(oset);
239    
240     } else {
241     /* subdivide cube */
242     if ((ot = octalloc()) == EMPTY)
243     error(SYSTEM, "out of octree space");
244     for (i = 0; i < 8; i++) {
245     cukid.cutree = EMPTY;
246     for (j = 0; j < 3; j++) {
247     cukid.cuorg[j] = cu->cuorg[j];
248     if ((1<<j) & i)
249     cukid.cuorg[j] += cukid.cusize;
250     }
251     for (j = 1; j <= oset[0]; j++)
252     addobject(&cukid, oset[j]);
253     addobject(&cukid, obj);
254     octkid(ot, i) = cukid.cutree;
255     }
256     cu->cutree = ot;
257     }
258     }
259     }