src/rt/p_data.c

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

#include "copyright.h"

#include  "ray.h"

#include  "data.h"

#include  "func.h"

/*
 *      A stored pattern can either be brightness or
 *  color data.  Brightness data is specified as:
 *
 *      modifier brightdata name
 *      4+ func dfname vfname v0 v1 .. xf
 *      0
 *      n A1 A2 ..
 *
 *  Color data is specified as:
 *
 *      modifier colordata name
 *      8+ rfunc gfunc bfunc rdfname gdfname bdfname vfname v0 v1 .. xf
 *      0
 *      n A1 A2 ..
 *
 *  Color picture data is specified as:
 *
 *      modifier colorpict name
 *      7+ rfunc gfunc bfunc 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.  The dfnames are the data file
 *  names.  The dimensions of the data files and the number
 *  of variables must match.  The funcs take a single argument
 *  for brightdata, and three for colordata and colorpict to produce
 *  interpolated values from the file.  The xf is a transformation
 *  to get from the original coordinates to the current coordinates.
 */


p_bdata(m, r)                   /* interpolate brightness data */
register OBJREC  *m;
RAY  *r;
{
        double  bval;
        double  pt[MAXDIM];
        DATARRAY  *dp;
        register MFUNC  *mf;
        register int  i;

        if (m->oargs.nsargs < 4)
                objerror(m, USER, "bad # arguments");
        dp = getdata(m->oargs.sarg[1]);
        i = (1 << dp->nd) - 1;
        mf = getfunc(m, 2, i<<3, 0);
        setfunc(m, r);
        errno = 0;
        for (i = dp->nd; i-- > 0; ) {
                pt[i] = evalue(mf->ep[i]);
                if (errno == EDOM || errno == ERANGE)
                        goto computerr;
        }
        bval = datavalue(dp, pt);
        errno = 0;
        bval = funvalue(m->oargs.sarg[0], 1, &bval);
        if (errno == EDOM || errno == ERANGE)
                goto computerr;
        scalecolor(r->pcol, bval);
        return(0);
computerr:
        objerror(m, WARNING, "compute error");
        return(0);
}


p_cdata(m, r)                   /* interpolate color data */
register OBJREC  *m;
RAY  *r;
{
        double  col[3];
        COLOR  cval;
        double  pt[MAXDIM];
        int  nv;
        DATARRAY  *dp;
        register MFUNC  *mf;
        register int  i;

        if (m->oargs.nsargs < 8)
                objerror(m, USER, "bad # arguments");
        dp = getdata(m->oargs.sarg[3]);
        i = (1 << (nv = dp->nd)) - 1;
        mf = getfunc(m, 6, i<<7, 0);
        setfunc(m, r);
        errno = 0;
        for (i = 0; i < nv; i++) {
                pt[i] = evalue(mf->ep[i]);
                if (errno == EDOM || errno == ERANGE)
                        goto computerr;
        }
        col[0] = datavalue(dp, pt);
        for (i = 1; i < 3; i++) {
                dp = getdata(m->oargs.sarg[i+3]);
                if (dp->nd != nv)
                        objerror(m, USER, "dimension error");
                col[i] = datavalue(dp, pt);
        }
        errno = 0;
        for (i = 0; i < 3; i++)
                if (fundefined(m->oargs.sarg[i]) < 3)
                        colval(cval,i) = funvalue(m->oargs.sarg[i], 1, col+i);
                else
                        colval(cval,i) = funvalue(m->oargs.sarg[i], 3, col);
        if (errno == EDOM || errno == ERANGE)
                goto computerr;
        multcolor(r->pcol, cval);
        return(0);
computerr:
        objerror(m, WARNING, "compute error");
        return(0);
}


p_pdata(m, r)                   /* interpolate picture data */
register OBJREC  *m;
RAY  *r;
{
        double  col[3];
        COLOR  cval;
        double  pt[2];
        DATARRAY  *dp;
        register MFUNC  *mf;
        register int  i;

        if (m->oargs.nsargs < 7)
                objerror(m, USER, "bad # arguments");
        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;
        dp = getpict(m->oargs.sarg[3]);
        for (i = 0; i < 3; i++)
                col[i] = datavalue(dp+i, pt);
        errno = 0;
        for (i = 0; i < 3; i++)
                if (fundefined(m->oargs.sarg[i]) < 3)
                        colval(cval,i) = funvalue(m->oargs.sarg[i], 1, col+i);
                else
                        colval(cval,i) = funvalue(m->oargs.sarg[i], 3, col);
        if (errno == EDOM || errno == ERANGE)
                goto computerr;
        multcolor(r->pcol, cval);
        return(0);

computerr:
        objerror(m, WARNING, "compute error");
        return(0);
}
Revision:	2.7
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 2.6:	+6 -6 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	2.5	static const char RCSid[] = "$Id$";
3	greg	1.1	#endif
4			/*
5			* p_data.c - routine for stored patterns.
6	greg	2.5	*/
7
8	greg	2.6	#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			* A stored pattern can either be brightness or
18			* color data. Brightness data is specified as:
19			*
20			* modifier brightdata name
21			* 4+ func dfname vfname v0 v1 .. xf
22			* 0
23			* n A1 A2 ..
24			*
25			* Color data is specified as:
26			*
27			* modifier colordata name
28			* 8+ rfunc gfunc bfunc rdfname gdfname bdfname vfname v0 v1 .. xf
29			* 0
30			* n A1 A2 ..
31			*
32			* Color picture data is specified as:
33			*
34			* modifier colorpict name
35			* 7+ rfunc gfunc bfunc pfname vfname vx vy xf
36			* 0
37			* n A1 A2 ..
38			*
39			* Vfname is the name of the file where the variable definitions
40			* can be found. The list of real arguments can be accessed by
41			* definitions in the file. The dfnames are the data file
42			* names. The dimensions of the data files and the number
43			* of variables must match. The funcs take a single argument
44			* for brightdata, and three for colordata and colorpict to produce
45			* interpolated values from the file. The xf is a transformation
46			* to get from the original coordinates to the current coordinates.
47			*/
48
49
50			p_bdata(m, r) /* interpolate brightness data */
51			register OBJREC *m;
52			RAY *r;
53			{
54			double bval;
55			double pt[MAXDIM];
56			DATARRAY *dp;
57	greg	2.2	register MFUNC *mf;
58			register int i;
59	greg	1.1
60			if (m->oargs.nsargs < 4)
61			objerror(m, USER, "bad # arguments");
62	greg	2.2	dp = getdata(m->oargs.sarg[1]);
63			i = (1 << dp->nd) - 1;
64			mf = getfunc(m, 2, i<<3, 0);
65			setfunc(m, r);
66	greg	1.2	errno = 0;
67	greg	2.2	for (i = dp->nd; i-- > 0; ) {
68			pt[i] = evalue(mf->ep[i]);
69	greg	2.7	if (errno == EDOM \|\| errno == ERANGE)
70	greg	2.2	goto computerr;
71	greg	1.1	}
72			bval = datavalue(dp, pt);
73			errno = 0;
74	greg	2.2	bval = funvalue(m->oargs.sarg[0], 1, &bval);
75	greg	2.7	if (errno == EDOM \|\| errno == ERANGE)
76	greg	1.1	goto computerr;
77			scalecolor(r->pcol, bval);
78	greg	2.4	return(0);
79	greg	1.1	computerr:
80			objerror(m, WARNING, "compute error");
81	greg	2.4	return(0);
82	greg	1.1	}
83
84
85			p_cdata(m, r) /* interpolate color data */
86			register OBJREC *m;
87			RAY *r;
88			{
89			double col[3];
90			COLOR cval;
91			double pt[MAXDIM];
92	greg	2.2	int nv;
93	greg	1.1	DATARRAY *dp;
94	greg	2.2	register MFUNC *mf;
95			register int i;
96	greg	1.1
97			if (m->oargs.nsargs < 8)
98			objerror(m, USER, "bad # arguments");
99	greg	2.2	dp = getdata(m->oargs.sarg[3]);
100			i = (1 << (nv = dp->nd)) - 1;
101			mf = getfunc(m, 6, i<<7, 0);
102			setfunc(m, r);
103			errno = 0;
104			for (i = 0; i < nv; i++) {
105			pt[i] = evalue(mf->ep[i]);
106	greg	2.7	if (errno == EDOM \|\| errno == ERANGE)
107	greg	1.1	goto computerr;
108			}
109	greg	2.2	col[0] = datavalue(dp, pt);
110			for (i = 1; i < 3; i++) {
111			dp = getdata(m->oargs.sarg[i+3]);
112	greg	1.1	if (dp->nd != nv)
113	greg	2.2	objerror(m, USER, "dimension error");
114	greg	1.1	col[i] = datavalue(dp, pt);
115			}
116			errno = 0;
117	greg	2.3	for (i = 0; i < 3; i++)
118			if (fundefined(m->oargs.sarg[i]) < 3)
119			colval(cval,i) = funvalue(m->oargs.sarg[i], 1, col+i);
120			else
121			colval(cval,i) = funvalue(m->oargs.sarg[i], 3, col);
122	greg	2.7	if (errno == EDOM \|\| errno == ERANGE)
123	greg	1.1	goto computerr;
124			multcolor(r->pcol, cval);
125	greg	2.4	return(0);
126	greg	1.1	computerr:
127			objerror(m, WARNING, "compute error");
128	greg	2.4	return(0);
129	greg	1.1	}
130
131
132			p_pdata(m, r) /* interpolate picture data */
133			register OBJREC *m;
134			RAY *r;
135			{
136			double col[3];
137			COLOR cval;
138			double pt[2];
139			DATARRAY *dp;
140	greg	2.2	register MFUNC *mf;
141			register int i;
142	greg	1.1
143			if (m->oargs.nsargs < 7)
144			objerror(m, USER, "bad # arguments");
145	greg	2.2	mf = getfunc(m, 4, 0x3<<5, 0);
146			setfunc(m, r);
147	greg	1.4	errno = 0;
148	greg	2.2	pt[1] = evalue(mf->ep[0]); /* y major ordering */
149			pt[0] = evalue(mf->ep[1]);
150	greg	2.7	if (errno == EDOM \|\| errno == ERANGE)
151	greg	1.4	goto computerr;
152	greg	2.2	dp = getpict(m->oargs.sarg[3]);
153	greg	1.1	for (i = 0; i < 3; i++)
154			col[i] = datavalue(dp+i, pt);
155			errno = 0;
156	greg	2.3	for (i = 0; i < 3; i++)
157			if (fundefined(m->oargs.sarg[i]) < 3)
158			colval(cval,i) = funvalue(m->oargs.sarg[i], 1, col+i);
159			else
160			colval(cval,i) = funvalue(m->oargs.sarg[i], 3, col);
161	greg	2.7	if (errno == EDOM \|\| errno == ERANGE)
162	greg	1.1	goto computerr;
163			multcolor(r->pcol, cval);
164	greg	2.4	return(0);
165	greg	1.1
166			computerr:
167			objerror(m, WARNING, "compute error");
168	greg	2.4	return(0);
169	greg	1.1	}