src/rt/mx_data.c

#ifndef lint
static const char       RCSid[] = "$Id: mx_data.c,v 2.8 2003/03/05 16:16:53 greg Exp $";
#endif
/*
 *  mx_data.c - routine for stored mixtures.
 */

#include "copyright.h"

#include  "ray.h"
#include  "data.h"
#include  "func.h"
#include  "rtotypes.h"

/*
 *  A stored mixture is specified:
 *
 *      modifier mixdata name
 *      6+ foremod backmod func dfname vfname v0 v1 .. xf
 *      0
 *      n A1 A2 ..
 *
 *  A picture mixture is specified as:
 *
 *      modifier mixpict name
 *      7+ foremod backmod func pfname vfname vx vy xf
 *      0
 *      n A1 A2 ..
 *
 *
 *  Vfname is the name of the file where the variable definitions
 *  can be found.  The list of real arguments can be accessed by
 *  definitions in the file.  Dfname is the data file.
 *  (Pfname is a picture file.)
 *  The dimensions of the data files and the number
 *  of variables must match.  The func is a single argument
 *  function in the case of mixdata (three argument in the case
 *  of mixpict), which returns the corrected data value given the
 *  interpolated value from the file.  The xf is a transformation
 *  to get from the original coordinates to the current coordinates.
 */


extern int
mx_data(                        /* interpolate mixture data */
        register OBJREC  *m,
        RAY  *r
)
{
        OBJECT  obj;
        double  coef;
        double  pt[MAXDIM];
        DATARRAY  *dp;
        OBJECT  mod[2];
        register MFUNC  *mf;
        register int  i;

        if (m->oargs.nsargs < 6)
                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);
                }
        dp = getdata(m->oargs.sarg[3]);
        i = (1 << dp->nd) - 1;
        mf = getfunc(m, 4, i<<5, 0);
        setfunc(m, r);
        errno = 0;
        for (i = 0; i < dp->nd; i++) {
                pt[i] = evalue(mf->ep[i]);
                if (errno == EDOM || errno == ERANGE)
                        goto computerr;
        }
        coef = datavalue(dp, pt);
        errno = 0;
        coef = funvalue(m->oargs.sarg[2], 1, &coef);
        if (errno == EDOM || errno == ERANGE)
                goto computerr;
        if (raymixture(r, mod[0], mod[1], coef)) {
                if (m->omod != OVOID)
                        objerror(m, USER, "inappropriate modifier");
                return(1);
        }
        return(0);
computerr:
        objerror(m, WARNING, "compute error");
        return(0);
}


extern int
mx_pdata(                       /* interpolate mixture picture */
        register OBJREC  *m,
        RAY  *r
)
{
        OBJECT  obj;
        double  col[3], coef;
        double  pt[MAXDIM];
        DATARRAY  *dp;
        OBJECT  mod[2];
        register MFUNC  *mf;
        register int  i;

        if (m->oargs.nsargs < 7)
                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);
                }
        dp = getpict(m->oargs.sarg[3]);
        mf = getfunc(m, 4, 0x3<<5, 0);
        setfunc(m, r);
        errno = 0;
        pt[1] = evalue(mf->ep[0]);      /* y major ordering */
        pt[0] = evalue(mf->ep[1]);
        if (errno == EDOM || errno == ERANGE)
                goto computerr;
        for (i = 0; i < 3; i++)         /* get pixel from picture */
                col[i] = datavalue(dp+i, pt);
        errno = 0;                      /* evaluate function on pixel */
        coef = funvalue(m->oargs.sarg[2], 3, col);
        if (errno == EDOM || errno == ERANGE)
                goto computerr;
        if (raymixture(r, mod[0], mod[1], coef)) {
                if (m->omod != OVOID)
                        objerror(m, USER, "inappropriate modifier");
                return(1);
        }
        return(0);
computerr:
        objerror(m, WARNING, "compute error");
        return(0);
}
Revision:	2.9
Committed:	Tue Mar 30 16:13:01 2004 UTC (20 years, 1 month ago) by schorsch
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R7P2, rad3R7P1, rad4R1, rad4R0, rad3R6, rad3R6P1, rad3R8, rad3R9
Changes since 2.8:	+12 -9 lines
Log Message:	Continued ANSIfication. There are only bits and pieces left now.
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	schorsch	2.9	static const char RCSid[] = "$Id: mx_data.c,v 2.8 2003/03/05 16:16:53 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* mx_data.c - routine for stored mixtures.
6	greg	2.6	*/
7
8	greg	2.7	#include "copyright.h"
9	greg	1.1
10			#include "ray.h"
11			#include "data.h"
12	greg	2.2	#include "func.h"
13	schorsch	2.9	#include "rtotypes.h"
14	greg	2.2
15	greg	1.1	/*
16	gwlarson	2.5	* A stored mixture is specified:
17	greg	1.1	*
18			* modifier mixdata name
19			* 6+ foremod backmod func dfname vfname v0 v1 .. xf
20			* 0
21			* n A1 A2 ..
22			*
23	gwlarson	2.5	* A picture mixture is specified as:
24			*
25			* modifier mixpict name
26			* 7+ foremod backmod func pfname vfname vx vy xf
27			* 0
28			* n A1 A2 ..
29			*
30			*
31	greg	1.1	* Vfname is the name of the file where the variable definitions
32			* can be found. The list of real arguments can be accessed by
33			* definitions in the file. Dfname is the data file.
34	gwlarson	2.5	* (Pfname is a picture file.)
35	greg	1.1	* The dimensions of the data files and the number
36			* of variables must match. The func is a single argument
37	gwlarson	2.5	* function in the case of mixdata (three argument in the case
38			* of mixpict), which returns the corrected data value given the
39	greg	1.1	* interpolated value from the file. The xf is a transformation
40			* to get from the original coordinates to the current coordinates.
41			*/
42
43
44	schorsch	2.9	extern int
45			mx_data( /* interpolate mixture data */
46			register OBJREC *m,
47			RAY *r
48			)
49	greg	1.1	{
50	gwlarson	2.4	OBJECT obj;
51	greg	1.1	double coef;
52			double pt[MAXDIM];
53			DATARRAY *dp;
54			OBJECT mod[2];
55	greg	2.2	register MFUNC *mf;
56			register int i;
57	greg	1.1
58			if (m->oargs.nsargs < 6)
59			objerror(m, USER, "bad # arguments");
60	gwlarson	2.4	obj = objndx(m);
61	greg	1.1	for (i = 0; i < 2; i++)
62	greg	2.2	if (!strcmp(m->oargs.sarg[i], VOIDID))
63	greg	1.1	mod[i] = OVOID;
64	gwlarson	2.4	else if ((mod[i] = lastmod(obj, m->oargs.sarg[i])) == OVOID) {
65	greg	2.2	sprintf(errmsg, "undefined modifier \"%s\"",
66			m->oargs.sarg[i]);
67	greg	1.1	objerror(m, USER, errmsg);
68			}
69	greg	2.2	dp = getdata(m->oargs.sarg[3]);
70			i = (1 << dp->nd) - 1;
71			mf = getfunc(m, 4, i<<5, 0);
72			setfunc(m, r);
73			errno = 0;
74			for (i = 0; i < dp->nd; i++) {
75			pt[i] = evalue(mf->ep[i]);
76	greg	2.8	if (errno == EDOM \|\| errno == ERANGE)
77	greg	1.1	goto computerr;
78			}
79			coef = datavalue(dp, pt);
80			errno = 0;
81	greg	2.2	coef = funvalue(m->oargs.sarg[2], 1, &coef);
82	greg	2.8	if (errno == EDOM \|\| errno == ERANGE)
83	gwlarson	2.5	goto computerr;
84			if (raymixture(r, mod[0], mod[1], coef)) {
85			if (m->omod != OVOID)
86			objerror(m, USER, "inappropriate modifier");
87			return(1);
88			}
89			return(0);
90			computerr:
91			objerror(m, WARNING, "compute error");
92			return(0);
93			}
94
95
96	schorsch	2.9	extern int
97			mx_pdata( /* interpolate mixture picture */
98			register OBJREC *m,
99			RAY *r
100			)
101	gwlarson	2.5	{
102			OBJECT obj;
103			double col[3], coef;
104			double pt[MAXDIM];
105			DATARRAY *dp;
106			OBJECT mod[2];
107			register MFUNC *mf;
108			register int i;
109
110			if (m->oargs.nsargs < 7)
111			objerror(m, USER, "bad # arguments");
112			obj = objndx(m);
113			for (i = 0; i < 2; i++)
114			if (!strcmp(m->oargs.sarg[i], VOIDID))
115			mod[i] = OVOID;
116			else if ((mod[i] = lastmod(obj, m->oargs.sarg[i])) == OVOID) {
117			sprintf(errmsg, "undefined modifier \"%s\"",
118			m->oargs.sarg[i]);
119			objerror(m, USER, errmsg);
120			}
121			dp = getpict(m->oargs.sarg[3]);
122			mf = getfunc(m, 4, 0x3<<5, 0);
123			setfunc(m, r);
124			errno = 0;
125			pt[1] = evalue(mf->ep[0]); /* y major ordering */
126			pt[0] = evalue(mf->ep[1]);
127	greg	2.8	if (errno == EDOM \|\| errno == ERANGE)
128	gwlarson	2.5	goto computerr;
129			for (i = 0; i < 3; i++) /* get pixel from picture */
130			col[i] = datavalue(dp+i, pt);
131			errno = 0; /* evaluate function on pixel */
132			coef = funvalue(m->oargs.sarg[2], 3, col);
133	greg	2.8	if (errno == EDOM \|\| errno == ERANGE)
134	greg	1.1	goto computerr;
135	greg	2.3	if (raymixture(r, mod[0], mod[1], coef)) {
136			if (m->omod != OVOID)
137			objerror(m, USER, "inappropriate modifier");
138			return(1);
139			}
140			return(0);
141	greg	1.1	computerr:
142			objerror(m, WARNING, "compute error");
143	greg	2.3	return(0);
144	greg	1.1	}