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root/radiance/ray/src/ot/writemesh.c
Revision: 2.6
Committed: Thu Apr 29 14:36:49 2004 UTC (20 years, 6 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad5R4, rad5R2, rad4R2P2, rad5R0, rad5R1, rad3R7P2, rad3R7P1, rad4R2, rad4R1, rad4R0, rad3R6, rad3R6P1, rad3R8, rad3R9, rad4R2P1, rad5R3, HEAD
Changes since 2.5: +4 -1 lines
Log Message:
Added macros to avoid flockfile(3) overhead

File Contents

# User Rev Content
1 greg 2.1 #ifndef lint
2 greg 2.6 static const char RCSid[] = "$Id: writemesh.c,v 2.5 2004/03/27 12:41:45 schorsch Exp $";
3 greg 2.1 #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 greg 2.6 #ifdef putc_unlocked /* avoid horrendous overhead of flockfile */
14     #define putc putc_unlocked
15     #endif
16 greg 2.1
17 schorsch 2.5 static void putfullnode(OCTREE fn, FILE *fp);
18     static void puttree(OCTREE ot, FILE *fp);
19     static void putpatch(MESHPATCH *pp, FILE *fp);
20    
21    
22 greg 2.1 static void
23 schorsch 2.5 putfullnode( /* write out a full node */
24     OCTREE fn,
25     FILE *fp
26     )
27 greg 2.1 {
28     OBJECT oset[MAXSET+1];
29     register int i;
30    
31     objset(oset, fn);
32     for (i = 0; i <= oset[0]; i++)
33     putint((long)oset[i], sizeof(OBJECT), fp);
34     }
35    
36    
37     static void
38 schorsch 2.5 puttree( /* write octree to fp in pre-order form */
39     register OCTREE ot,
40     FILE *fp
41     )
42 greg 2.1 {
43    
44     if (istree(ot)) {
45     register int i;
46     putc(OT_TREE, fp); /* indicate tree */
47     for (i = 0; i < 8; i++) /* write tree */
48     puttree(octkid(ot, i), fp);
49     return;
50     }
51     if (isfull(ot)) {
52     putc(OT_FULL, fp); /* indicate fullnode */
53     putfullnode(ot, fp); /* write fullnode */
54     return;
55     }
56     putc(OT_EMPTY, fp); /* indicate empty */
57     }
58    
59    
60     static void
61 schorsch 2.5 putpatch( /* write out a mesh patch */
62     register MESHPATCH *pp,
63     FILE *fp
64     )
65 greg 2.1 {
66     int flags = MT_V;
67     int i, j;
68     /* vertex flags */
69     if (pp->norm != NULL)
70     flags |= MT_N;
71     if (pp->uv != NULL)
72     flags |= MT_UV;
73     putint((long)flags, 1, fp);
74     /* number of vertices */
75     putint((long)pp->nverts, 2, fp);
76     /* vertex xyz locations */
77     for (i = 0; i < pp->nverts; i++)
78     for (j = 0; j < 3; j++)
79     putint((long)pp->xyz[i][j], 4, fp);
80     /* vertex normals */
81     if (flags & MT_N)
82     for (i = 0; i < pp->nverts; i++)
83     putint((long)pp->norm[i], 4, fp);
84     /* uv coordinates */
85     if (flags & MT_UV)
86     for (i = 0; i < pp->nverts; i++)
87     for (j = 0; j < 2; j++)
88 greg 2.4 putint((long)pp->uv[i][j], 4, fp);
89 greg 2.1 /* local triangles */
90     putint((long)pp->ntris, 2, fp);
91     for (i = 0; i < pp->ntris; i++) {
92     putint((long)pp->tri[i].v1, 1, fp);
93     putint((long)pp->tri[i].v2, 1, fp);
94     putint((long)pp->tri[i].v3, 1, fp);
95     }
96 greg 2.2 /* local triangle material(s) */
97     if (pp->trimat == NULL) {
98     putint(1L, 2, fp);
99     putint((long)pp->solemat, 2, fp);
100     } else {
101     putint((long)pp->ntris, 2, fp);
102     for (i = 0; i < pp->ntris; i++)
103     putint((long)pp->trimat[i], 2, fp);
104     }
105 greg 2.1 /* joiner triangles */
106     putint((long)pp->nj1tris, 2, fp);
107     for (i = 0; i < pp->nj1tris; i++) {
108     putint((long)pp->j1tri[i].v1j, 4, fp);
109     putint((long)pp->j1tri[i].v2, 1, fp);
110     putint((long)pp->j1tri[i].v3, 1, fp);
111 greg 2.2 putint((long)pp->j1tri[i].mat, 2, fp);
112 greg 2.1 }
113     /* double joiner triangles */
114     putint((long)pp->nj2tris, 2, fp);
115     for (i = 0; i < pp->nj2tris; i++) {
116     putint((long)pp->j2tri[i].v1j, 4, fp);
117     putint((long)pp->j2tri[i].v2j, 4, fp);
118     putint((long)pp->j2tri[i].v3, 1, fp);
119 greg 2.2 putint((long)pp->j2tri[i].mat, 2, fp);
120 greg 2.1 }
121     }
122    
123    
124     void
125     writemesh(mp, fp) /* write mesh structures to fp */
126     MESH *mp;
127     FILE *fp;
128     {
129 greg 2.2 char *err;
130 greg 2.1 char sbuf[64];
131     int i;
132 greg 2.2 /* do we have everything? */
133 greg 2.1 if ((mp->ldflags & (IO_SCENE|IO_TREE|IO_BOUNDS)) !=
134     (IO_SCENE|IO_TREE|IO_BOUNDS))
135     error(INTERNAL, "missing data in writemesh");
136 greg 2.2 /* validate mesh data */
137     if ((err = checkmesh(mp)) != NULL)
138     error(USER, err);
139 greg 2.1 /* write format number */
140     putint((long)(MESHMAGIC+sizeof(OBJECT)), 2, fp);
141     /* write boundaries */
142     for (i = 0; i < 3; i++) {
143     sprintf(sbuf, "%.12g", mp->mcube.cuorg[i]);
144     putstr(sbuf, fp);
145     }
146     sprintf(sbuf, "%.12g", mp->mcube.cusize);
147     putstr(sbuf, fp);
148     for (i = 0; i < 2; i++) {
149     putflt(mp->uvlim[0][i], fp);
150     putflt(mp->uvlim[1][i], fp);
151     }
152     /* write the octree */
153     puttree(mp->mcube.cutree, fp);
154 greg 2.2 /* write the materials */
155     writescene(mp->mat0, mp->nmats, fp);
156 greg 2.1 /* write the patches */
157     putint((long)mp->npatches, 4, fp);
158     for (i = 0; i < mp->npatches; i++)
159     putpatch(&mp->patch[i], fp);
160     if (ferror(fp))
161     error(SYSTEM, "write error in writemesh");
162     }