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Comparing ray/src/rt/ambio.c (file contents):
Revision 2.1 by greg, Mon Jul 13 16:15:21 1992 UTC vs.
Revision 2.5 by greg, Tue Feb 25 02:47:22 2003 UTC

#	Line 1 | Line 1
1	–	/* Copyright (c) 1992 Regents of the University of California */
2	–
1		#ifndef lint
2	<	static char SCCSid[] = "$SunId$ LBL";
2	>	static const char       RCSid[] = "$Id$";
3		#endif
6	–
4		/*
5		* Read and write portable ambient values
6	+	*
7	+	*  Declarations of external symbols in ambient.h
8		*/
9
10	<	#include <stdio.h>
10	>	#include "copyright.h"
11
12	<	#include "color.h"
12	>	#include "ray.h"
13
14		#include "ambient.h"
15
#	Line 19 | Line 18 | static char SCCSid[] = "$SunId$ LBL";
18
19		#define  getvec(v,fp)   (v)[0]=getflt(fp);(v)[1]=getflt(fp);(v)[2]=getflt(fp)
20
21	+	#define  badflt(x)      ((x) < -FHUGE || (x) > FHUGE)
22
23	<	extern double  getflt();
24	<	extern long  getint();
23	>	#define  badvec(v)      (badflt((v)[0]) || badflt((v)[1]) || badflt((v)[2]))
24
25
26	+
27	+	void
28	+	putambmagic(fp)                 /* write out ambient value magic number */
29	+	FILE  *fp;
30	+	{
31	+	putint((long)AMBMAGIC, 2, fp);
32	+	}
33	+
34	+
35	+	int
36	+	hasambmagic(fp)                 /* read in and check validity of magic # */
37	+	FILE  *fp;
38	+	{
39	+	register int  magic;
40	+
41	+	magic = getint(2, fp);
42	+	if (feof(fp))
43	+	return(0);
44	+	return(magic == AMBMAGIC);
45	+	}
46	+
47	+
48	+	int
49		writambval(av, fp)              /* write ambient value to stream */
50		register AMBVAL  *av;
51		FILE  *fp;
#	Line 44 | Line 66 | FILE  *fp;
66		}
67
68
69	+	int
70	+	ambvalOK(av)                    /* check consistency of ambient value */
71	+	register AMBVAL  *av;
72	+	{
73	+	double  d;
74	+
75	+	if (badvec(av->pos)) return(0);
76	+	if (badvec(av->dir)) return(0);
77	+	d = DOT(av->dir,av->dir);
78	+	if (d < 0.9999 || d > 1.0001) return(0);
79	+	if (av->lvl < 0 || av->lvl > 100) return(0);
80	+	if (av->weight <= 0. || av->weight > 1.) return(0);
81	+	if (av->rad <= 0. || av->rad >= FHUGE) return(0);
82	+	if (colval(av->val,RED) < 0. ||
83	+	colval(av->val,RED) > FHUGE ||
84	+	colval(av->val,GRN) < 0. ||
85	+	colval(av->val,GRN) > FHUGE ||
86	+	colval(av->val,BLU) < 0. ||
87	+	colval(av->val,BLU) > FHUGE) return(0);
88	+	if (badvec(av->gpos)) return(0);
89	+	if (badvec(av->gdir)) return(0);
90	+	return(1);
91	+	}
92	+
93	+
94	+	int
95		readambval(av, fp)              /* read ambient value from stream */
96		register AMBVAL  *av;
97		FILE  *fp;
#	Line 62 | Line 110 | FILE  *fp;
110		av->rad = getflt(fp);
111		getvec(av->gpos, fp);
112		getvec(av->gdir, fp);
113	<	return(feof(fp) ? 0 : 1);
113	>	return(feof(fp) ? 0 : ambvalOK(av));
114		}

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