src/rt/ambio.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 * Read and write portable ambient values
 *
 *  Declarations of external symbols in ambient.h
 */

/* ====================================================================
 * The Radiance Software License, Version 1.0
 *
 * Copyright (c) 1990 - 2002 The Regents of the University of California,
 * through Lawrence Berkeley National Laboratory.   All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *         notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *           if any, must include the following acknowledgment:
 *             "This product includes Radiance software
 *                 (http://radsite.lbl.gov/)
 *                 developed by the Lawrence Berkeley National Laboratory
 *               (http://www.lbl.gov/)."
 *       Alternately, this acknowledgment may appear in the software itself,
 *       if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
 *       and "The Regents of the University of California" must
 *       not be used to endorse or promote products derived from this
 *       software without prior written permission. For written
 *       permission, please contact [email protected].
 *
 * 5. Products derived from this software may not be called "Radiance",
 *       nor may "Radiance" appear in their name, without prior written
 *       permission of Lawrence Berkeley National Laboratory.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.   IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Lawrence Berkeley National Laboratory.   For more
 * information on Lawrence Berkeley National Laboratory, please see
 * <http://www.lbl.gov/>.
 */

#include "ray.h"

#include "ambient.h"


#define  putvec(v,fp)   putflt((v)[0],fp);putflt((v)[1],fp);putflt((v)[2],fp)

#define  getvec(v,fp)   (v)[0]=getflt(fp);(v)[1]=getflt(fp);(v)[2]=getflt(fp)

#define  badflt(x)      ((x) < -FHUGE || (x) > FHUGE)

#define  badvec(v)      (badflt((v)[0]) || badflt((v)[1]) || badflt((v)[2]))


void
putambmagic(fp)                 /* write out ambient value magic number */
FILE  *fp;
{
        putint((long)AMBMAGIC, 2, fp);
}


int
hasambmagic(fp)                 /* read in and check validity of magic # */
FILE  *fp;
{
        register int  magic;

        magic = getint(2, fp);
        if (feof(fp))
                return(0);
        return(magic == AMBMAGIC);
}


int
writambval(av, fp)              /* write ambient value to stream */
register AMBVAL  *av;
FILE  *fp;
{
        COLR  col;

        putint((long)av->lvl, 1, fp);
        putflt(av->weight, fp);
        putvec(av->pos, fp);
        putvec(av->dir, fp);
        setcolr(col, colval(av->val,RED),
                        colval(av->val,GRN), colval(av->val,BLU));
        fwrite((char *)col, sizeof(col), 1, fp);
        putflt(av->rad, fp);
        putvec(av->gpos, fp);
        putvec(av->gdir, fp);
        return(ferror(fp) ? -1 : 0);
}


int
ambvalOK(av)                    /* check consistency of ambient value */
register AMBVAL  *av;
{
        double  d;

        if (badvec(av->pos)) return(0);
        if (badvec(av->dir)) return(0);
        d = DOT(av->dir,av->dir);
        if (d < 0.9999 || d > 1.0001) return(0);
        if (av->lvl < 0 || av->lvl > 100) return(0);
        if (av->weight <= 0. || av->weight > 1.) return(0);
        if (av->rad <= 0. || av->rad >= FHUGE) return(0);
        if (colval(av->val,RED) < 0. ||
                        colval(av->val,RED) > FHUGE ||
                        colval(av->val,GRN) < 0. ||
                        colval(av->val,GRN) > FHUGE ||
                        colval(av->val,BLU) < 0. ||
                        colval(av->val,BLU) > FHUGE) return(0);
        if (badvec(av->gpos)) return(0);
        if (badvec(av->gdir)) return(0);
        return(1);
}


int
readambval(av, fp)              /* read ambient value from stream */
register AMBVAL  *av;
FILE  *fp;
{
        COLR  col;

        av->lvl = getint(1, fp);
        if (feof(fp))
                return(0);
        av->weight = getflt(fp);
        getvec(av->pos, fp);
        getvec(av->dir, fp);
        if (fread((char *)col, sizeof(col), 1, fp) != 1)
                return(0);
        colr_color(av->val, col);
        av->rad = getflt(fp);
        getvec(av->gpos, fp);
        getvec(av->gdir, fp);
        return(feof(fp) ? 0 : ambvalOK(av));
}
Revision:	2.4
Committed:	Sat Feb 22 02:07:28 2003 UTC (21 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.3:	+64 -11 lines
Log Message:	Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
#	Content
1	#ifndef lint
2	static const char RCSid[] = "$Id$";
3	#endif
4	/*
5	* Read and write portable ambient values
6	*
7	* Declarations of external symbols in ambient.h
8	*/
9
10	/* ====================================================================
11	* The Radiance Software License, Version 1.0
12	*
13	* Copyright (c) 1990 - 2002 The Regents of the University of California,
14	* through Lawrence Berkeley National Laboratory. All rights reserved.
15	*
16	* Redistribution and use in source and binary forms, with or without
17	* modification, are permitted provided that the following conditions
18	* are met:
19	*
20	* 1. Redistributions of source code must retain the above copyright
21	* notice, this list of conditions and the following disclaimer.
22	*
23	* 2. Redistributions in binary form must reproduce the above copyright
24	* notice, this list of conditions and the following disclaimer in
25	* the documentation and/or other materials provided with the
26	* distribution.
27	*
28	* 3. The end-user documentation included with the redistribution,
29	* if any, must include the following acknowledgment:
30	* "This product includes Radiance software
31	* (http://radsite.lbl.gov/)
32	* developed by the Lawrence Berkeley National Laboratory
33	* (http://www.lbl.gov/)."
34	* Alternately, this acknowledgment may appear in the software itself,
35	* if and wherever such third-party acknowledgments normally appear.
36	*
37	* 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
38	* and "The Regents of the University of California" must
39	* not be used to endorse or promote products derived from this
40	* software without prior written permission. For written
41	* permission, please contact [email protected].
42	*
43	* 5. Products derived from this software may not be called "Radiance",
44	* nor may "Radiance" appear in their name, without prior written
45	* permission of Lawrence Berkeley National Laboratory.
46	*
47	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
48	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
49	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
50	* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
51	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
52	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
53	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
54	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
55	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
56	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
57	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58	* SUCH DAMAGE.
59	* ====================================================================
60	*
61	* This software consists of voluntary contributions made by many
62	* individuals on behalf of Lawrence Berkeley National Laboratory. For more
63	* information on Lawrence Berkeley National Laboratory, please see
64	* <http://www.lbl.gov/>.
65	*/
66
67	#include "ray.h"
68
69	#include "ambient.h"
70
71
72	#define putvec(v,fp) putflt((v)[0],fp);putflt((v)[1],fp);putflt((v)[2],fp)
73
74	#define getvec(v,fp) (v)[0]=getflt(fp);(v)[1]=getflt(fp);(v)[2]=getflt(fp)
75
76	#define badflt(x) ((x) < -FHUGE \|\| (x) > FHUGE)
77
78	#define badvec(v) (badflt((v)[0]) \|\| badflt((v)[1]) \|\| badflt((v)[2]))
79
80
81
82	void
83	putambmagic(fp) /* write out ambient value magic number */
84	FILE *fp;
85	{
86	putint((long)AMBMAGIC, 2, fp);
87	}
88
89
90	int
91	hasambmagic(fp) /* read in and check validity of magic # */
92	FILE *fp;
93	{
94	register int magic;
95
96	magic = getint(2, fp);
97	if (feof(fp))
98	return(0);
99	return(magic == AMBMAGIC);
100	}
101
102
103	int
104	writambval(av, fp) /* write ambient value to stream */
105	register AMBVAL *av;
106	FILE *fp;
107	{
108	COLR col;
109
110	putint((long)av->lvl, 1, fp);
111	putflt(av->weight, fp);
112	putvec(av->pos, fp);
113	putvec(av->dir, fp);
114	setcolr(col, colval(av->val,RED),
115	colval(av->val,GRN), colval(av->val,BLU));
116	fwrite((char *)col, sizeof(col), 1, fp);
117	putflt(av->rad, fp);
118	putvec(av->gpos, fp);
119	putvec(av->gdir, fp);
120	return(ferror(fp) ? -1 : 0);
121	}
122
123
124	int
125	ambvalOK(av) /* check consistency of ambient value */
126	register AMBVAL *av;
127	{
128	double d;
129
130	if (badvec(av->pos)) return(0);
131	if (badvec(av->dir)) return(0);
132	d = DOT(av->dir,av->dir);
133	if (d < 0.9999 \|\| d > 1.0001) return(0);
134	if (av->lvl < 0 \|\| av->lvl > 100) return(0);
135	if (av->weight <= 0. \|\| av->weight > 1.) return(0);
136	if (av->rad <= 0. \|\| av->rad >= FHUGE) return(0);
137	if (colval(av->val,RED) < 0. \|\|
138	colval(av->val,RED) > FHUGE \|\|
139	colval(av->val,GRN) < 0. \|\|
140	colval(av->val,GRN) > FHUGE \|\|
141	colval(av->val,BLU) < 0. \|\|
142	colval(av->val,BLU) > FHUGE) return(0);
143	if (badvec(av->gpos)) return(0);
144	if (badvec(av->gdir)) return(0);
145	return(1);
146	}
147
148
149	int
150	readambval(av, fp) /* read ambient value from stream */
151	register AMBVAL *av;
152	FILE *fp;
153	{
154	COLR col;
155
156	av->lvl = getint(1, fp);
157	if (feof(fp))
158	return(0);
159	av->weight = getflt(fp);
160	getvec(av->pos, fp);
161	getvec(av->dir, fp);
162	if (fread((char *)col, sizeof(col), 1, fp) != 1)
163	return(0);
164	colr_color(av->val, col);
165	av->rad = getflt(fp);
166	getvec(av->gpos, fp);
167	getvec(av->gdir, fp);
168	return(feof(fp) ? 0 : ambvalOK(av));
169	}