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root/radiance/ray/src/hd/genrhgrid.c
Revision: 3.8
Committed: Thu Jan 1 11:21:55 2004 UTC (20 years, 3 months ago) by schorsch
Content type: text/plain
Branch: MAIN
CVS Tags: rad4R2P2, rad5R0, rad5R1, rad3R7P2, rad3R7P1, rad4R2, rad4R1, rad4R0, rad3R6, rad3R6P1, rad3R8, rad3R9, rad4R2P1
Changes since 3.7: +26 -11 lines
Log Message:
Ansification and prototypes.

File Contents

# User Rev Content
1 gregl 3.1 #ifndef lint
2 schorsch 3.8 static const char RCSid[] = "$Id: genrhgrid.c,v 3.7 2003/10/22 02:06:34 greg Exp $";
3 gregl 3.1 #endif
4     /*
5     * Generate renderable grids from a holodeck file
6     */
7    
8 schorsch 3.8 #include <stdio.h>
9    
10 greg 3.7 #include "platform.h"
11 schorsch 3.8 #include "resolu.h"
12 gregl 3.1 #include "holo.h"
13    
14     char *progname; /* global argv[0] */
15    
16     char *mat, *name; /* material and object id */
17     double rad; /* grid line radius */
18    
19 schorsch 3.8 static void gridsect(char *fname, int sect);
20     static void putgrid(HOLO *hp);
21     static void putline(FVECT wp[2]);
22    
23 gregl 3.1
24 schorsch 3.8 int
25     main(
26     int argc,
27     char *argv[]
28     )
29 gregl 3.1 {
30     int sect;
31    
32     progname = argv[0];
33 schorsch 3.5 if ((argc < 5) | (argc > 6))
34 gregl 3.1 goto userr;
35     mat = argv[1];
36     name = argv[2];
37     rad = atof(argv[3]);
38     sect = argc==5 ? -1 : atoi(argv[5]);
39     fputs("# ", stdout);
40     printargs(argc, argv, stdout);
41     gridsect(argv[4], sect);
42     quit(0);
43     userr:
44     fprintf(stderr, "Usage: %s mat name rad input.hdk [section]\n",
45     progname);
46     exit(1);
47     }
48    
49    
50 schorsch 3.8 void
51     gridsect( /* get specified section(s) and print grids */
52     char *fname,
53     int sect
54     )
55 gregl 3.1 {
56     FILE *fp;
57     HOLO hdsect;
58     int fd;
59 greg 3.4 int32 nextloc;
60 gregl 3.1 int n;
61     /* open holodeck file */
62     if ((fp = fopen(fname, "r")) == NULL) {
63     sprintf(errmsg, "cannot open \"%s\"", fname);
64     error(SYSTEM, errmsg);
65     }
66     /* check header and magic number */
67     if (checkheader(fp, HOLOFMT, NULL) < 0 || getw(fp) != HOLOMAGIC) {
68     sprintf(errmsg, "file \"%s\" not in holodeck format", fname);
69     error(USER, errmsg);
70     }
71     fd = dup(fileno(fp)); /* dup file handle */
72     nextloc = ftell(fp); /* get stdio position */
73     fclose(fp); /* done with stdio */
74     for (n = 0; nextloc > 0L; n++) { /* get the section(s) */
75 greg 3.6 lseek(fd, (off_t)nextloc, SEEK_SET);
76 gregl 3.1 read(fd, (char *)&nextloc, sizeof(nextloc));
77 schorsch 3.5 if ((sect < 0) | (n == sect)) {
78 gregl 3.1 read(fd, (char *)&hdsect, sizeof(HDGRID));
79     hdcompgrid(&hdsect);
80     putgrid(&hdsect); /* print grid */
81     }
82     }
83     }
84    
85    
86 schorsch 3.8 void
87     putgrid( /* run through holodeck section grid lines */
88     register HOLO *hp
89     )
90 gregl 3.1 {
91     register int w, i;
92     int g0, g1;
93     FVECT wp[2], mov;
94     double d;
95     /* do each wall on this section */
96     for (w = 0; w < 6; w++) {
97     g0 = hdwg0[w];
98     g1 = hdwg1[w];
99     d = 1.0/hp->grid[g0];
100     mov[0] = d * hp->xv[g0][0];
101     mov[1] = d * hp->xv[g0][1];
102     mov[2] = d * hp->xv[g0][2];
103     if (w & 1) {
104     VSUM(wp[0], hp->orig, hp->xv[w>>1], 1.);
105     VSUM(wp[0], wp[0], mov, 1.);
106     } else
107     VCOPY(wp[0], hp->orig);
108     VSUM(wp[1], wp[0], hp->xv[g1], 1.);
109     for (i = hp->grid[g0]; ; ) { /* g0 lines */
110     putline(wp);
111     if (!--i) break;
112     wp[0][0] += mov[0]; wp[0][1] += mov[1];
113     wp[0][2] += mov[2]; wp[1][0] += mov[0];
114     wp[1][1] += mov[1]; wp[1][2] += mov[2];
115     }
116     d = 1.0/hp->grid[g1];
117     mov[0] = d * hp->xv[g1][0];
118     mov[1] = d * hp->xv[g1][1];
119     mov[2] = d * hp->xv[g1][2];
120     if (w & 1)
121     VSUM(wp[0], hp->orig, hp->xv[w>>1], 1.);
122     else
123     VSUM(wp[0], hp->orig, mov, 1.);
124     VSUM(wp[1], wp[0], hp->xv[g0], 1.);
125     for (i = hp->grid[g1]; ; ) { /* g1 lines */
126     putline(wp);
127     if (!--i) break;
128     wp[0][0] += mov[0]; wp[0][1] += mov[1];
129     wp[0][2] += mov[2]; wp[1][0] += mov[0];
130     wp[1][1] += mov[1]; wp[1][2] += mov[2];
131     }
132     }
133     }
134    
135    
136 schorsch 3.8 void
137     putline( /* put out a line */
138     register FVECT wp[2]
139     )
140 gregl 3.1 {
141     static int cnt = 0;
142    
143     printf("\n%s cylinder %s.%d\n0\n0\n7\n", mat, name, ++cnt);
144     printf("\t%.4e %.4e %.4e\n", wp[0][0], wp[0][1], wp[0][2]);
145     printf("\t%.4e %.4e %.4e\n", wp[1][0], wp[1][1], wp[1][2]);
146     printf("\t%.4e\n", rad);
147     }