src/rt/mx_func.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 *  mx_func.c - routine for mixture functions.
 */

/* ====================================================================
 * 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  "func.h"

/*
 *      A mixture function is specified:
 *
 *      modifier mixfunc name
 *      4+ foremod backmod varname vfname xf
 *      0
 *      n A1 A2 ..
 *
 *  Vfname is the name of the file where the variable definition
 *  can be found.  The list of real arguments can be accessed by
 *  definitions in the file.  The xf is a transformation
 *  to get from the original coordinates to the current coordinates.
 */


mx_func(m, r)                   /* compute mixture function */
register OBJREC  *m;
RAY  *r;
{
        OBJECT  obj;
        register int  i;
        double  coef;
        OBJECT  mod[2];
        register MFUNC  *mf;

        if (m->oargs.nsargs < 4)
                objerror(m, USER, "bad # arguments");
        obj = objndx(m);
        for (i = 0; i < 2; i++)
                if (!strcmp(m->oargs.sarg[i], VOIDID))
                        mod[i] = OVOID;
                else if ((mod[i] = lastmod(obj, m->oargs.sarg[i])) == OVOID) {
                        sprintf(errmsg, "undefined modifier \"%s\"",
                                        m->oargs.sarg[i]);
                        objerror(m, USER, errmsg);
                }
        mf = getfunc(m, 3, 0x4, 0);
        setfunc(m, r);
        errno = 0;
        coef = evalue(mf->ep[0]);
        if (errno) {
                objerror(m, WARNING, "compute error");
                return(0);
        }
        if (raymixture(r, mod[0], mod[1], coef)) {
                if (m->omod != OVOID)
                        objerror(m, USER, "inappropriate modifier");
                return(1);
        }
        return(0);
}
Revision:	2.5
Committed:	Sat Feb 22 02:07:28 2003 UTC (21 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.4:	+57 -5 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	* mx_func.c - routine for mixture functions.
6	*/
7
8	/* ====================================================================
9	* The Radiance Software License, Version 1.0
10	*
11	* Copyright (c) 1990 - 2002 The Regents of the University of California,
12	* through Lawrence Berkeley National Laboratory. All rights reserved.
13	*
14	* Redistribution and use in source and binary forms, with or without
15	* modification, are permitted provided that the following conditions
16	* are met:
17	*
18	* 1. Redistributions of source code must retain the above copyright
19	* notice, this list of conditions and the following disclaimer.
20	*
21	* 2. Redistributions in binary form must reproduce the above copyright
22	* notice, this list of conditions and the following disclaimer in
23	* the documentation and/or other materials provided with the
24	* distribution.
25	*
26	* 3. The end-user documentation included with the redistribution,
27	* if any, must include the following acknowledgment:
28	* "This product includes Radiance software
29	* (http://radsite.lbl.gov/)
30	* developed by the Lawrence Berkeley National Laboratory
31	* (http://www.lbl.gov/)."
32	* Alternately, this acknowledgment may appear in the software itself,
33	* if and wherever such third-party acknowledgments normally appear.
34	*
35	* 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
36	* and "The Regents of the University of California" must
37	* not be used to endorse or promote products derived from this
38	* software without prior written permission. For written
39	* permission, please contact [email protected].
40	*
41	* 5. Products derived from this software may not be called "Radiance",
42	* nor may "Radiance" appear in their name, without prior written
43	* permission of Lawrence Berkeley National Laboratory.
44	*
45	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
46	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
48	* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
49	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
50	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
51	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
52	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
53	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
54	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
55	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56	* SUCH DAMAGE.
57	* ====================================================================
58	*
59	* This software consists of voluntary contributions made by many
60	* individuals on behalf of Lawrence Berkeley National Laboratory. For more
61	* information on Lawrence Berkeley National Laboratory, please see
62	* <http://www.lbl.gov/>.
63	*/
64
65	#include "ray.h"
66
67	#include "func.h"
68
69	/*
70	* A mixture function is specified:
71	*
72	* modifier mixfunc name
73	* 4+ foremod backmod varname vfname xf
74	* 0
75	* n A1 A2 ..
76	*
77	* Vfname is the name of the file where the variable definition
78	* can be found. The list of real arguments can be accessed by
79	* definitions in the file. The xf is a transformation
80	* to get from the original coordinates to the current coordinates.
81	*/
82
83
84	mx_func(m, r) /* compute mixture function */
85	register OBJREC *m;
86	RAY *r;
87	{
88	OBJECT obj;
89	register int i;
90	double coef;
91	OBJECT mod[2];
92	register MFUNC *mf;
93
94	if (m->oargs.nsargs < 4)
95	objerror(m, USER, "bad # arguments");
96	obj = objndx(m);
97	for (i = 0; i < 2; i++)
98	if (!strcmp(m->oargs.sarg[i], VOIDID))
99	mod[i] = OVOID;
100	else if ((mod[i] = lastmod(obj, m->oargs.sarg[i])) == OVOID) {
101	sprintf(errmsg, "undefined modifier \"%s\"",
102	m->oargs.sarg[i]);
103	objerror(m, USER, errmsg);
104	}
105	mf = getfunc(m, 3, 0x4, 0);
106	setfunc(m, r);
107	errno = 0;
108	coef = evalue(mf->ep[0]);
109	if (errno) {
110	objerror(m, WARNING, "compute error");
111	return(0);
112	}
113	if (raymixture(r, mod[0], mod[1], coef)) {
114	if (m->omod != OVOID)
115	objerror(m, USER, "inappropriate modifier");
116	return(1);
117	}
118	return(0);
119	}