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root/radiance/ray/src/ot/writemesh.c
Revision: 2.1
Committed: Tue Mar 11 17:08:55 2003 UTC (21 years ago) by greg
Content type: text/plain
Branch: MAIN
Log Message:
First working version of new "mesh" primitive, obj2mesh converter

File Contents

# User Rev Content
1 greg 2.1 #ifndef lint
2     static const char RCSid[] = "$Id$";
3     #endif
4     /*
5     * Routines for writing compiled mesh to a file stream
6     */
7    
8     #include "standard.h"
9     #include "octree.h"
10     #include "object.h"
11     #include "mesh.h"
12    
13    
14     static void
15     putfullnode(fn, fp) /* write out a full node */
16     OCTREE fn;
17     FILE *fp;
18     {
19     OBJECT oset[MAXSET+1];
20     register int i;
21    
22     objset(oset, fn);
23     for (i = 0; i <= oset[0]; i++)
24     putint((long)oset[i], sizeof(OBJECT), fp);
25     }
26    
27    
28     static void
29     puttree(ot, fp) /* write octree to fp in pre-order form */
30     register OCTREE ot;
31     FILE *fp;
32     {
33    
34     if (istree(ot)) {
35     register int i;
36     putc(OT_TREE, fp); /* indicate tree */
37     for (i = 0; i < 8; i++) /* write tree */
38     puttree(octkid(ot, i), fp);
39     return;
40     }
41     if (isfull(ot)) {
42     putc(OT_FULL, fp); /* indicate fullnode */
43     putfullnode(ot, fp); /* write fullnode */
44     return;
45     }
46     putc(OT_EMPTY, fp); /* indicate empty */
47     }
48    
49    
50     static void
51     putpatch(pp, fp) /* write out a mesh patch */
52     register MESHPATCH *pp;
53     FILE *fp;
54     {
55     int flags = MT_V;
56     int i, j;
57     /* vertex flags */
58     if (pp->norm != NULL)
59     flags |= MT_N;
60     if (pp->uv != NULL)
61     flags |= MT_UV;
62     putint((long)flags, 1, fp);
63     /* number of vertices */
64     putint((long)pp->nverts, 2, fp);
65     /* vertex xyz locations */
66     for (i = 0; i < pp->nverts; i++)
67     for (j = 0; j < 3; j++)
68     putint((long)pp->xyz[i][j], 4, fp);
69     /* vertex normals */
70     if (flags & MT_N)
71     for (i = 0; i < pp->nverts; i++)
72     putint((long)pp->norm[i], 4, fp);
73     /* uv coordinates */
74     if (flags & MT_UV)
75     for (i = 0; i < pp->nverts; i++)
76     for (j = 0; j < 2; j++)
77     putint((long)pp->uv[i][j], 4, fp);
78     /* local triangles */
79     putint((long)pp->ntris, 2, fp);
80     for (i = 0; i < pp->ntris; i++) {
81     putint((long)pp->tri[i].v1, 1, fp);
82     putint((long)pp->tri[i].v2, 1, fp);
83     putint((long)pp->tri[i].v3, 1, fp);
84     }
85     /* joiner triangles */
86     putint((long)pp->nj1tris, 2, fp);
87     for (i = 0; i < pp->nj1tris; i++) {
88     putint((long)pp->j1tri[i].v1j, 4, fp);
89     putint((long)pp->j1tri[i].v2, 1, fp);
90     putint((long)pp->j1tri[i].v3, 1, fp);
91     }
92     /* double joiner triangles */
93     putint((long)pp->nj2tris, 2, fp);
94     for (i = 0; i < pp->nj2tris; i++) {
95     putint((long)pp->j2tri[i].v1j, 4, fp);
96     putint((long)pp->j2tri[i].v2j, 4, fp);
97     putint((long)pp->j2tri[i].v3, 1, fp);
98     }
99     }
100    
101    
102     void
103     writemesh(mp, fp) /* write mesh structures to fp */
104     MESH *mp;
105     FILE *fp;
106     {
107     char sbuf[64];
108     int i;
109     /* check that we have everything */
110     if ((mp->ldflags & (IO_SCENE|IO_TREE|IO_BOUNDS)) !=
111     (IO_SCENE|IO_TREE|IO_BOUNDS))
112     error(INTERNAL, "missing data in writemesh");
113     /* write format number */
114     putint((long)(MESHMAGIC+sizeof(OBJECT)), 2, fp);
115     /* write boundaries */
116     for (i = 0; i < 3; i++) {
117     sprintf(sbuf, "%.12g", mp->mcube.cuorg[i]);
118     putstr(sbuf, fp);
119     }
120     sprintf(sbuf, "%.12g", mp->mcube.cusize);
121     putstr(sbuf, fp);
122     for (i = 0; i < 2; i++) {
123     putflt(mp->uvlim[0][i], fp);
124     putflt(mp->uvlim[1][i], fp);
125     }
126     /* write the octree */
127     puttree(mp->mcube.cutree, fp);
128     /* write the patches */
129     putint((long)mp->npatches, 4, fp);
130     for (i = 0; i < mp->npatches; i++)
131     putpatch(&mp->patch[i], fp);
132     if (ferror(fp))
133     error(SYSTEM, "write error in writemesh");
134     }