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root/radiance/ray/src/hd/genrhenv.c
Revision: 3.7
Committed: Wed Oct 22 02:06:34 2003 UTC (20 years, 11 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad3R6P1, rad3R6
Changes since 3.6: +2 -2 lines
Log Message:
Fewer complaints if "platform.h" precedes "standard.h"

File Contents

# User Rev Content
1 gregl 3.1 #ifndef lint
2 greg 3.7 static const char RCSid[] = "$Id: genrhenv.c,v 3.6 2003/10/20 16:01:55 greg Exp $";
3 gregl 3.1 #endif
4     /*
5     * Create a closed environment from a holodeck section
6     */
7    
8 greg 3.7 #include "platform.h"
9 gregl 3.1 #include "holo.h"
10    
11     #define ourhp (hdlist[0])
12    
13     char *progname; /* global argv[0] */
14     char *prefix; /* file name prefix */
15    
16     HDBEAMI *gabmi; /* beam index array */
17    
18    
19     main(argc, argv)
20     int argc;
21     char *argv[];
22     {
23     int sect;
24     register int n;
25    
26     progname = argv[0];
27     if (argc < 3 | argc > 4)
28     goto userr;
29     prefix = argv[1];
30     sect = argc==3 ? 0 : atoi(argv[3]);
31     openholo(argv[2], sect);
32     mkcalfile(argv[2], sect);
33     n = ourhp->grid[0] * ourhp->grid[1];
34     if (ourhp->grid[0] * ourhp->grid[2] > n)
35     n = ourhp->grid[0] * ourhp->grid[2];
36     if (ourhp->grid[1] * ourhp->grid[2] > n)
37     n = ourhp->grid[1] * ourhp->grid[2];
38     gabmi = (HDBEAMI *)malloc(n*sizeof(HDBEAMI));
39     if (gabmi == NULL)
40     error(SYSTEM, "out of memory in main");
41     while (n--)
42     gabmi[n].h = ourhp;
43 gregl 3.2 fputs("# ", stdout);
44     printargs(argc, argv, stdout);
45 gregl 3.1 hdcachesize = 0;
46     for (n = 0; n < 6; n++)
47     mkwall(argv[2], sect, n);
48     quit(0);
49     userr:
50     fprintf(stderr, "Usage: %s prefix input.hdk [section]\n", progname);
51     exit(1);
52     }
53    
54    
55     openholo(fname, sect) /* open holodeck section for input */
56     char *fname;
57     int sect;
58     {
59     FILE *fp;
60     int fd;
61 greg 3.5 int32 nextloc;
62 gregl 3.1 int n;
63     /* open holodeck file */
64     if ((fp = fopen(fname, "r")) == NULL) {
65     sprintf(errmsg, "cannot open \"%s\"", fname);
66     error(SYSTEM, errmsg);
67     }
68     /* check header and magic number */
69     if (checkheader(fp, HOLOFMT, NULL) < 0 || getw(fp) != HOLOMAGIC) {
70     sprintf(errmsg, "file \"%s\" not in holodeck format", fname);
71     error(USER, errmsg);
72     }
73     fd = dup(fileno(fp)); /* dup file handle */
74     nextloc = ftell(fp); /* get stdio position */
75     fclose(fp); /* done with stdio */
76     for (n = 0; nextloc > 0L; n++) { /* get the indicated section */
77 greg 3.6 lseek(fd, (off_t)nextloc, SEEK_SET);
78 gregl 3.1 read(fd, (char *)&nextloc, sizeof(nextloc));
79     if (n == sect) {
80     hdinit(fd, NULL);
81     return;
82     }
83     }
84     error(USER, "holodeck section not found");
85     }
86    
87    
88     mkwall(hdk, sect, wn) /* make map for indicated wall */
89     char *hdk;
90     int sect;
91     int wn;
92     {
93     static char cname[3][6] = {"Red", "Green", "Blue"};
94     char fnbuf[128];
95     FILE *cdat[3];
96     int st = 0;
97     int wo, i, j;
98     /* loop through each opposing wall */
99     for (wo = 0; wo < 6; wo++) {
100     if (wo == wn) continue;
101     /* create data files */
102     sprintf(fnbuf, "%s_%dr%d.dat", prefix, wn, wo);
103     if ((cdat[0] = fopen(fnbuf, "w")) == NULL)
104     goto openerr;
105     sprintf(fnbuf, "%s_%dg%d.dat", prefix, wn, wo);
106     if ((cdat[1] = fopen(fnbuf, "w")) == NULL)
107     goto openerr;
108     sprintf(fnbuf, "%s_%db%d.dat", prefix, wn, wo);
109     if ((cdat[2] = fopen(fnbuf, "w")) == NULL)
110     goto openerr;
111     /* write dimensions */
112     for (i = 0; i < 3; i++) {
113     fprintf(cdat[i],
114     "# %s channel for wall %d -> wall %d of section %d in holodeck \"%s\"\n",
115     cname[i], wo, wn, sect, hdk);
116     fprintf(cdat[i],
117     "4\n0.5 %.1f %d\n0.5 %.1f %d\n0.5 %.1f %d\n0.5 %.1f %d\n",
118     ourhp->grid[hdwg0[wn]]-.5, ourhp->grid[hdwg0[wn]],
119     ourhp->grid[hdwg1[wn]]-.5, ourhp->grid[hdwg1[wn]],
120     ourhp->grid[hdwg0[wo]]-.5, ourhp->grid[hdwg0[wo]],
121     ourhp->grid[hdwg1[wo]]-.5, ourhp->grid[hdwg1[wo]]);
122     }
123     /* run each grid cell */
124     for (i = 0; i < ourhp->grid[hdwg0[wn]]; i++)
125     for (j = 0; j < ourhp->grid[hdwg1[wn]]; j++)
126     dogrid(wn, i, j, wo, cdat);
127     /* close files */
128     if (fclose(cdat[0]) == EOF | fclose(cdat[1]) == EOF |
129     fclose(cdat[2]) == EOF)
130     error(SYSTEM, "write error in mkwall");
131     /* put out pattern */
132     printf("\n%s colordata wallmap\n", st++ ? "wallmap" : "void");
133     printf("11 f f f %s_%dr%d.dat %s_%dg%d.dat %s_%db%d.dat\n",
134     prefix,wn,wo, prefix,wn,wo, prefix,wn,wo);
135     printf("\t%s.cal nu nv ou ov\n0\n2 %d %d\n", prefix, wn, wo);
136     }
137     /* put out polygon */
138     printf("\nwallmap glow wallglow\n0\n0\n4 1 1 1 0\n");
139     printf("\nwallglow polygon wall%d\n0\n0\n12\n", wn);
140     wallverts(wn);
141     return;
142     openerr:
143     sprintf(errmsg, "cannot open \"%d\" for writing", fnbuf);
144     error(SYSTEM, errmsg);
145     }
146    
147    
148     wallverts(wn) /* print out vertices for wall wn */
149     int wn;
150     {
151     int rev, i0, i1;
152     FVECT corn, vt;
153    
154     if ((rev = wn & 1))
155     VSUM(corn, ourhp->orig, ourhp->xv[wn>>1], 1.);
156     else
157     VCOPY(corn, ourhp->orig);
158     fcross(vt, ourhp->xv[i0=hdwg0[wn]], ourhp->xv[i1=hdwg1[wn]]);
159     if (DOT(vt, ourhp->wg[wn>>1]) < 0.)
160     rev ^= 1;
161     if (rev) {
162     i0 = hdwg1[wn]; i1 = hdwg0[wn];
163     }
164     printf("\t%.10e %.10e %.10e\n", corn[0], corn[1], corn[2]);
165     printf("\t%.10e %.10e %.10e\n", corn[0] + ourhp->xv[i0][0],
166     corn[1] + ourhp->xv[i0][1], corn[2] + ourhp->xv[i0][2]);
167     printf("\t%.10e %.10e %.10e\n",
168     corn[0] + ourhp->xv[i0][0] + ourhp->xv[i1][0],
169     corn[1] + ourhp->xv[i0][1] + ourhp->xv[i1][1],
170     corn[2] + ourhp->xv[i0][2] + ourhp->xv[i1][2]);
171     printf("\t%.10e %.10e %.10e\n", corn[0] + ourhp->xv[i1][0],
172     corn[1] + ourhp->xv[i1][1], corn[2] + ourhp->xv[i1][2]);
173     }
174    
175    
176     dogrid(wn, ci, cj, wo, dfp) /* compute and write grid cell data */
177     int wn, ci, cj, wo;
178     FILE *dfp[3];
179     {
180     GCOORD gc[2];
181     COLOR cavg;
182     register int n;
183    
184     gc[1].w = wn; gc[1].i[0] = ci; gc[1].i[1] = cj;
185     gc[0].w = wo;
186     n = 0; /* load beams in optimal order */
187     for (gc[0].i[0] = ourhp->grid[hdwg0[gc[0].w]]; gc[0].i[0]--; )
188     for (gc[0].i[1] = ourhp->grid[hdwg1[gc[0].w]]; gc[0].i[1]--; )
189     gabmi[n++].b = hdbindex(ourhp, gc);
190     hdloadbeams(gabmi, n, NULL);
191     /* run beams in regular order */
192     fprintf(dfp[0], "\n# Begin grid cell (%d,%d)\n", ci, cj);
193     fprintf(dfp[1], "\n# Begin grid cell (%d,%d)\n", ci, cj);
194     fprintf(dfp[2], "\n# Begin grid cell (%d,%d)\n", ci, cj);
195     for (gc[0].i[0] = 0; gc[0].i[0] < ourhp->grid[hdwg0[gc[0].w]];
196     gc[0].i[0]++) {
197     for (gc[0].i[1] = 0; gc[0].i[1] < ourhp->grid[hdwg1[gc[0].w]];
198     gc[0].i[1]++) {
199     avgbeam(cavg, gc);
200     fprintf(dfp[0], " %.2e", colval(cavg,RED));
201     fprintf(dfp[1], " %.2e", colval(cavg,GRN));
202     fprintf(dfp[2], " %.2e", colval(cavg,BLU));
203     }
204     fputc('\n', dfp[0]);
205     fputc('\n', dfp[1]);
206     fputc('\n', dfp[2]);
207     }
208     hdflush(NULL); /* flush cache */
209     }
210    
211    
212     avgbeam(cavg, gc) /* compute average beam color */
213     COLOR cavg;
214     GCOORD gc[2];
215     {
216     static COLOR crun = BLKCOLOR;
217     static int ncrun = 0;
218     register BEAM *bp;
219     COLOR cray;
220     unsigned beamlen;
221     int ls[2][3];
222     FVECT gp[2], wp[2];
223     double d;
224     int n;
225     register int i;
226    
227     bp = hdgetbeam(ourhp, hdbindex(ourhp, gc));
228     if (bp == NULL || !bp->nrm) { /* use running average */
229     copycolor(cavg, crun);
230     if (ncrun > 1) {
231     d = 1./ncrun;
232     scalecolor(cavg, d);
233     }
234     } else { /* use beam average */
235     hdlseg(ls, ourhp, gc); /* get beam length */
236     for (i = 3; i--; ) {
237     gp[0][i] = ls[0][i] + .5;
238     gp[1][i] = ls[1][i] + .5;
239     }
240     hdworld(wp[0], ourhp, gp[0]);
241     hdworld(wp[1], ourhp, gp[1]);
242     d = sqrt(dist2(wp[0], wp[1]));
243     beamlen = hdcode(ourhp, d);
244     setcolor(cavg, 0., 0., 0.);
245     n = 0;
246     for (i = bp->nrm; i--; ) {
247     if (hdbray(bp)[i].d < beamlen)
248     continue; /* inside section */
249     colr_color(cray, hdbray(bp)[i].v);
250     addcolor(cavg, cray);
251     n++;
252     }
253     if (n > 1) {
254     d = 1./n;
255     scalecolor(cavg, d);
256     }
257     if (n) {
258     addcolor(crun, cavg);
259     ncrun++;
260     }
261     }
262     }
263    
264    
265     mkcalfile(hdk, sect) /* create .cal file */
266     char *hdk;
267     int sect;
268     {
269     char fname[128];
270     FILE *fp;
271     register int i;
272    
273     sprintf(fname, "%s.cal", prefix);
274     if ((fp = fopen(fname, "w")) == NULL) {
275     sprintf(errmsg, "cannot open \"%s\" for writing", fname);
276     error(SYSTEM, errmsg);
277     }
278     fprintf(fp,
279     "{\n\tCoordinate calculation for section %d of holodeck \"%s\"\n}\n",
280     sect, hdk);
281    
282     fprintf(fp, "\n{ Constants }\n");
283     fprintf(fp, "hox : %.7e; hoy : %.7e; hoz : %.7e;\n",
284     ourhp->orig[0], ourhp->orig[1], ourhp->orig[2]);
285     fprintf(fp, "grid(i) : select(i+1, %d, %d, %d);\n",
286     ourhp->grid[0], ourhp->grid[1], ourhp->grid[2]);
287     fprintf(fp, "hwgx(i) : select(i+1, %.7e, %.7e, %.7e);\n",
288     ourhp->wg[0][0], ourhp->wg[1][0], ourhp->wg[2][0]);
289     fprintf(fp, "hwgy(i) : select(i+1, %.7e, %.7e, %.7e);\n",
290     ourhp->wg[0][1], ourhp->wg[1][1], ourhp->wg[2][1]);
291     fprintf(fp, "hwgz(i) : select(i+1, %.7e, %.7e, %.7e);\n",
292     ourhp->wg[0][2], ourhp->wg[1][2], ourhp->wg[2][2]);
293     fprintf(fp, "hwo(i) : select(i+1, %.7e, %.7e, %.7e,\n",
294     ourhp->wo[0], ourhp->wo[1], ourhp->wo[2]);
295     fprintf(fp, "\t\t%.7e, %.7e, %.7e);\n",
296     ourhp->wo[3], ourhp->wo[4], ourhp->wo[5]);
297     fprintf(fp,
298     "wgp(i,x,y,z) : (x-hox)*hwgx(i) + (y-hoy)*hwgy(i) + (z-hoz)*hwgz(i);\n");
299     fprintf(fp, "wg0(w) : select(.5*w+.75, 1, 2, 0);\n");
300     fprintf(fp, "wg1(w) : select(.5*w+.75, 2, 0, 1);\n");
301    
302     fprintf(fp, "\n{ Variables }\n");
303     fprintf(fp, "nw = arg(1); ow = arg(2);\n");
304     fprintf(fp, "oax = .5*ow-.25;\n");
305     fprintf(fp, "ng0 = wg0(nw); ng1 = wg1(nw);\n");
306     fprintf(fp, "og0 = wg0(ow); og1 = wg1(ow);\n");
307     fprintf(fp,
308     "odenom = Dx*hwgx(oax) + Dy*hwgy(oax) + Dz*hwgz(oax);\n");
309     fprintf(fp, "odist = if(and(FTINY-odenom, FTINY+odenom), -1,\n");
310     fprintf(fp,
311     "\t\t(Px*hwgx(oax) + Py*hwgy(oax) + Pz*hwgz(oax) - hwo(ow))/odenom);\n");
312     fprintf(fp,
313     "opx = Px - odist*Dx; opy = Py - odist*Dy; opz = Pz - odist*Dz;\n");
314     fprintf(fp, "nu = wgp(ng0,Px,Py,Pz);\n");
315     fprintf(fp, "nv = wgp(ng1,Px,Py,Pz);\n");
316     fprintf(fp, "ou = wgp(og0,opx,opy,opz);\n");
317     fprintf(fp, "ov = wgp(og1,opx,opy,opz);\n");
318     fprintf(fp, "f(v) = if(and(and(ou-FTINY,grid(og0)-ou-FTINY),\n");
319     fprintf(fp, "\t\tand(ov-FTINY,grid(og1)-ov-FTINY)), if(v,v,0), 1);\n");
320     fclose(fp);
321     }
322    
323    
324 greg 3.3 void
325 gregl 3.1 eputs(s) /* put error message to stderr */
326     register char *s;
327     {
328     static int midline = 0;
329    
330     if (!*s)
331     return;
332     if (!midline++) { /* prepend line with program name */
333     fputs(progname, stderr);
334     fputs(": ", stderr);
335     }
336     fputs(s, stderr);
337     if (s[strlen(s)-1] == '\n') {
338     fflush(stderr);
339     midline = 0;
340     }
341     }