src/rt/mx_data.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 *  mx_data.c - routine for stored mixtures.
 */

#include "copyright.h"

#include  "ray.h"

#include  "data.h"

#include  "func.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.
 */


mx_data(m, r)                   /* 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);
}


mx_pdata(m, r)                  /* 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:	2.8
Committed:	Wed Mar 5 16:16:53 2003 UTC (22 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R5
Changes since 2.7:	+4 -4 lines
Log Message:	Made errno checking explicit after math calls to avoid spurious warnings
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.6	static const char RCSid[] = "$Id$";
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
12			#include "data.h"
13
14	greg	2.2	#include "func.h"
15
16	greg	1.1	/*
17	gwlarson	2.5	* A stored mixture is specified:
18	greg	1.1	*
19			* modifier mixdata name
20			* 6+ foremod backmod func dfname vfname v0 v1 .. xf
21			* 0
22			* n A1 A2 ..
23			*
24	gwlarson	2.5	* A picture mixture is specified as:
25			*
26			* modifier mixpict name
27			* 7+ foremod backmod func pfname vfname vx vy xf
28			* 0
29			* n A1 A2 ..
30			*
31			*
32	greg	1.1	* Vfname is the name of the file where the variable definitions
33			* can be found. The list of real arguments can be accessed by
34			* definitions in the file. Dfname is the data file.
35	gwlarson	2.5	* (Pfname is a picture file.)
36	greg	1.1	* The dimensions of the data files and the number
37			* of variables must match. The func is a single argument
38	gwlarson	2.5	* function in the case of mixdata (three argument in the case
39			* of mixpict), which returns the corrected data value given the
40	greg	1.1	* interpolated value from the file. The xf is a transformation
41			* to get from the original coordinates to the current coordinates.
42			*/
43
44
45			mx_data(m, r) /* interpolate mixture data */
46			register OBJREC *m;
47			RAY *r;
48			{
49	gwlarson	2.4	OBJECT obj;
50	greg	1.1	double coef;
51			double pt[MAXDIM];
52			DATARRAY *dp;
53			OBJECT mod[2];
54	greg	2.2	register MFUNC *mf;
55			register int i;
56	greg	1.1
57			if (m->oargs.nsargs < 6)
58			objerror(m, USER, "bad # arguments");
59	gwlarson	2.4	obj = objndx(m);
60	greg	1.1	for (i = 0; i < 2; i++)
61	greg	2.2	if (!strcmp(m->oargs.sarg[i], VOIDID))
62	greg	1.1	mod[i] = OVOID;
63	gwlarson	2.4	else if ((mod[i] = lastmod(obj, m->oargs.sarg[i])) == OVOID) {
64	greg	2.2	sprintf(errmsg, "undefined modifier \"%s\"",
65			m->oargs.sarg[i]);
66	greg	1.1	objerror(m, USER, errmsg);
67			}
68	greg	2.2	dp = getdata(m->oargs.sarg[3]);
69			i = (1 << dp->nd) - 1;
70			mf = getfunc(m, 4, i<<5, 0);
71			setfunc(m, r);
72			errno = 0;
73			for (i = 0; i < dp->nd; i++) {
74			pt[i] = evalue(mf->ep[i]);
75	greg	2.8	if (errno == EDOM \|\| errno == ERANGE)
76	greg	1.1	goto computerr;
77			}
78			coef = datavalue(dp, pt);
79			errno = 0;
80	greg	2.2	coef = funvalue(m->oargs.sarg[2], 1, &coef);
81	greg	2.8	if (errno == EDOM \|\| errno == ERANGE)
82	gwlarson	2.5	goto computerr;
83			if (raymixture(r, mod[0], mod[1], coef)) {
84			if (m->omod != OVOID)
85			objerror(m, USER, "inappropriate modifier");
86			return(1);
87			}
88			return(0);
89			computerr:
90			objerror(m, WARNING, "compute error");
91			return(0);
92			}
93
94
95			mx_pdata(m, r) /* interpolate mixture picture */
96			register OBJREC *m;
97			RAY *r;
98			{
99			OBJECT obj;
100			double col[3], coef;
101			double pt[MAXDIM];
102			DATARRAY *dp;
103			OBJECT mod[2];
104			register MFUNC *mf;
105			register int i;
106
107			if (m->oargs.nsargs < 7)
108			objerror(m, USER, "bad # arguments");
109			obj = objndx(m);
110			for (i = 0; i < 2; i++)
111			if (!strcmp(m->oargs.sarg[i], VOIDID))
112			mod[i] = OVOID;
113			else if ((mod[i] = lastmod(obj, m->oargs.sarg[i])) == OVOID) {
114			sprintf(errmsg, "undefined modifier \"%s\"",
115			m->oargs.sarg[i]);
116			objerror(m, USER, errmsg);
117			}
118			dp = getpict(m->oargs.sarg[3]);
119			mf = getfunc(m, 4, 0x3<<5, 0);
120			setfunc(m, r);
121			errno = 0;
122			pt[1] = evalue(mf->ep[0]); /* y major ordering */
123			pt[0] = evalue(mf->ep[1]);
124	greg	2.8	if (errno == EDOM \|\| errno == ERANGE)
125	gwlarson	2.5	goto computerr;
126			for (i = 0; i < 3; i++) /* get pixel from picture */
127			col[i] = datavalue(dp+i, pt);
128			errno = 0; /* evaluate function on pixel */
129			coef = funvalue(m->oargs.sarg[2], 3, col);
130	greg	2.8	if (errno == EDOM \|\| errno == ERANGE)
131	greg	1.1	goto computerr;
132	greg	2.3	if (raymixture(r, mod[0], mod[1], coef)) {
133			if (m->omod != OVOID)
134			objerror(m, USER, "inappropriate modifier");
135			return(1);
136			}
137			return(0);
138	greg	1.1	computerr:
139			objerror(m, WARNING, "compute error");
140	greg	2.3	return(0);
141	greg	1.1	}