1 |
/* Copyright (c) 1992 Regents of the University of California */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ LBL"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* Read and write portable ambient values |
9 |
*/ |
10 |
|
11 |
#include <stdio.h> |
12 |
|
13 |
#include "color.h" |
14 |
|
15 |
#include "ambient.h" |
16 |
|
17 |
|
18 |
#define putvec(v,fp) putflt((v)[0],fp);putflt((v)[1],fp);putflt((v)[2],fp) |
19 |
|
20 |
#define getvec(v,fp) (v)[0]=getflt(fp);(v)[1]=getflt(fp);(v)[2]=getflt(fp) |
21 |
|
22 |
|
23 |
extern double getflt(); |
24 |
extern long getint(); |
25 |
|
26 |
|
27 |
putambmagic(fp) /* write out ambient value magic number */ |
28 |
FILE *fp; |
29 |
{ |
30 |
putint((long)AMBMAGIC, 2, fp); |
31 |
} |
32 |
|
33 |
|
34 |
hasambmagic(fp) /* read in and check validity of magic # */ |
35 |
FILE *fp; |
36 |
{ |
37 |
register int magic; |
38 |
|
39 |
magic = getint(2, fp); |
40 |
if (feof(fp)) |
41 |
return(0); |
42 |
return(magic == AMBMAGIC); |
43 |
} |
44 |
|
45 |
|
46 |
writambval(av, fp) /* write ambient value to stream */ |
47 |
register AMBVAL *av; |
48 |
FILE *fp; |
49 |
{ |
50 |
COLR col; |
51 |
|
52 |
putint((long)av->lvl, 1, fp); |
53 |
putflt(av->weight, fp); |
54 |
putvec(av->pos, fp); |
55 |
putvec(av->dir, fp); |
56 |
setcolr(col, colval(av->val,RED), |
57 |
colval(av->val,GRN), colval(av->val,BLU)); |
58 |
fwrite((char *)col, sizeof(col), 1, fp); |
59 |
putflt(av->rad, fp); |
60 |
putvec(av->gpos, fp); |
61 |
putvec(av->gdir, fp); |
62 |
return(ferror(fp) ? -1 : 0); |
63 |
} |
64 |
|
65 |
|
66 |
readambval(av, fp) /* read ambient value from stream */ |
67 |
register AMBVAL *av; |
68 |
FILE *fp; |
69 |
{ |
70 |
COLR col; |
71 |
|
72 |
av->lvl = getint(1, fp); |
73 |
if (feof(fp)) |
74 |
return(0); |
75 |
av->weight = getflt(fp); |
76 |
getvec(av->pos, fp); |
77 |
getvec(av->dir, fp); |
78 |
if (fread((char *)col, sizeof(col), 1, fp) != 1) |
79 |
return(0); |
80 |
colr_color(av->val, col); |
81 |
av->rad = getflt(fp); |
82 |
getvec(av->gpos, fp); |
83 |
getvec(av->gdir, fp); |
84 |
return(feof(fp) ? 0 : 1); |
85 |
} |