src/rt/p_data.c

/* Copyright (c) 1991 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  p_data.c - routine for stored patterns.
 *
 *     6/4/86
 */

#include  "ray.h"

#include  "data.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;
{
        extern double  varvalue(), funvalue(), datavalue();
        extern int  errno;
        int  nv;
        double  bval;
        double  pt[MAXDIM];
        DATARRAY  *dp;
        register char  **sa;

        setfunc(m, r);

        sa = m->oargs.sarg;

        if (m->oargs.nsargs < 4)
                objerror(m, USER, "bad # arguments");
        funcfile(sa[2]);
        errno = 0;
        for (nv = 0; nv+3 < m->oargs.nsargs &&
                        sa[nv+3][0] != '-'; nv++) {
                if (nv >= MAXDIM)
                        goto dimerr;
                pt[nv] = varvalue(sa[nv+3]);
        }
        if (errno)
                goto computerr;
        dp = getdata(sa[1]);
        if (dp->nd != nv)
                goto dimerr;
        bval = datavalue(dp, pt);
        errno = 0;
        bval = funvalue(sa[0], 1, &bval);
        if (errno)
                goto computerr;
        scalecolor(r->pcol, bval);
        return;

dimerr:
        objerror(m, USER, "dimension error");

computerr:
        objerror(m, WARNING, "compute error");
        return;
}


p_cdata(m, r)                   /* interpolate color data */
register OBJREC  *m;
RAY  *r;
{
        extern double  varvalue(), funvalue(), datavalue();
        extern int  errno;
        int  i, nv;
        double  col[3];
        COLOR  cval;
        double  pt[MAXDIM];
        DATARRAY  *dp;
        register char  **sa;

        setfunc(m, r);

        sa = m->oargs.sarg;

        if (m->oargs.nsargs < 8)
                objerror(m, USER, "bad # arguments");
        funcfile(sa[6]);
        for (nv = 0; nv+7 < m->oargs.nsargs &&
                        sa[nv+7][0] != '-'; nv++) {
                if (nv >= MAXDIM)
                        goto dimerr;
                errno = 0;
                pt[nv] = varvalue(sa[nv+7]);
                if (errno)
                        goto computerr;
        }
        for (i = 0; i < 3; i++) {
                dp = getdata(sa[i+3]);
                if (dp->nd != nv)
                        goto dimerr;
                col[i] = datavalue(dp, pt);
        }
        errno = 0;
        setcolor(cval,  funvalue(sa[0], 3, col),
                        funvalue(sa[1], 3, col),
                        funvalue(sa[2], 3, col));
        if (errno)
                goto computerr;
        multcolor(r->pcol, cval);
        return;

dimerr:
        objerror(m, USER, "dimension error");

computerr:
        objerror(m, WARNING, "compute error");
        return;
}


p_pdata(m, r)                   /* interpolate picture data */
register OBJREC  *m;
RAY  *r;
{
        extern double  varvalue(), funvalue(), datavalue();
        extern int  errno;
        int  i;
        double  col[3];
        COLOR  cval;
        double  pt[2];
        DATARRAY  *dp;
        register char  **sa;

        setfunc(m, r);

        sa = m->oargs.sarg;

        if (m->oargs.nsargs < 7)
                objerror(m, USER, "bad # arguments");
        funcfile(sa[4]);
        errno = 0;
        pt[1] = varvalue(sa[5]);        /* y major ordering */
        pt[0] = varvalue(sa[6]);
        if (errno)
                goto computerr;
        dp = getpict(sa[3]);
        for (i = 0; i < 3; i++)
                col[i] = datavalue(dp+i, pt);
        errno = 0;
        setcolor(cval,  funvalue(sa[0], 3, col),
                        funvalue(sa[1], 3, col),
                        funvalue(sa[2], 3, col));
        if (errno)
                goto computerr;
        multcolor(r->pcol, cval);
        return;

computerr:
        objerror(m, WARNING, "compute error");
        return;
}
Revision:	1.5
Committed:	Thu Aug 8 11:30:04 1991 UTC (34 years, 3 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.4:	+3 -6 lines
Log Message:	added contexts to function files
#	User	Rev	Content
1	greg	1.4	/* Copyright (c) 1991 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* p_data.c - routine for stored patterns.
9			*
10			* 6/4/86
11			*/
12
13			#include "ray.h"
14
15			#include "data.h"
16
17			/*
18			* A stored pattern can either be brightness or
19			* color data. Brightness data is specified as:
20			*
21			* modifier brightdata name
22			* 4+ func dfname vfname v0 v1 .. xf
23			* 0
24			* n A1 A2 ..
25			*
26			* Color data is specified as:
27			*
28			* modifier colordata name
29			* 8+ rfunc gfunc bfunc rdfname gdfname bdfname vfname v0 v1 .. xf
30			* 0
31			* n A1 A2 ..
32			*
33			* Color picture data is specified as:
34			*
35			* modifier colorpict name
36			* 7+ rfunc gfunc bfunc pfname vfname vx vy xf
37			* 0
38			* n A1 A2 ..
39			*
40			* Vfname is the name of the file where the variable definitions
41			* can be found. The list of real arguments can be accessed by
42			* definitions in the file. The dfnames are the data file
43			* names. The dimensions of the data files and the number
44			* of variables must match. The funcs take a single argument
45			* for brightdata, and three for colordata and colorpict to produce
46			* interpolated values from the file. The xf is a transformation
47			* to get from the original coordinates to the current coordinates.
48			*/
49
50
51			p_bdata(m, r) /* interpolate brightness data */
52			register OBJREC *m;
53			RAY *r;
54			{
55			extern double varvalue(), funvalue(), datavalue();
56			extern int errno;
57			int nv;
58			double bval;
59			double pt[MAXDIM];
60			DATARRAY *dp;
61			register char **sa;
62
63			setfunc(m, r);
64
65			sa = m->oargs.sarg;
66
67			if (m->oargs.nsargs < 4)
68			objerror(m, USER, "bad # arguments");
69	greg	1.5	funcfile(sa[2]);
70	greg	1.2	errno = 0;
71	greg	1.1	for (nv = 0; nv+3 < m->oargs.nsargs &&
72			sa[nv+3][0] != '-'; nv++) {
73			if (nv >= MAXDIM)
74			goto dimerr;
75			pt[nv] = varvalue(sa[nv+3]);
76			}
77	greg	1.2	if (errno)
78			goto computerr;
79	greg	1.1	dp = getdata(sa[1]);
80			if (dp->nd != nv)
81			goto dimerr;
82			bval = datavalue(dp, pt);
83			errno = 0;
84			bval = funvalue(sa[0], 1, &bval);
85			if (errno)
86			goto computerr;
87			scalecolor(r->pcol, bval);
88			return;
89
90			dimerr:
91			objerror(m, USER, "dimension error");
92
93			computerr:
94			objerror(m, WARNING, "compute error");
95			return;
96			}
97
98
99			p_cdata(m, r) /* interpolate color data */
100			register OBJREC *m;
101			RAY *r;
102			{
103			extern double varvalue(), funvalue(), datavalue();
104			extern int errno;
105			int i, nv;
106			double col[3];
107			COLOR cval;
108			double pt[MAXDIM];
109			DATARRAY *dp;
110			register char **sa;
111
112			setfunc(m, r);
113
114			sa = m->oargs.sarg;
115
116			if (m->oargs.nsargs < 8)
117			objerror(m, USER, "bad # arguments");
118	greg	1.5	funcfile(sa[6]);
119	greg	1.1	for (nv = 0; nv+7 < m->oargs.nsargs &&
120			sa[nv+7][0] != '-'; nv++) {
121			if (nv >= MAXDIM)
122			goto dimerr;
123			errno = 0;
124			pt[nv] = varvalue(sa[nv+7]);
125			if (errno)
126			goto computerr;
127			}
128			for (i = 0; i < 3; i++) {
129			dp = getdata(sa[i+3]);
130			if (dp->nd != nv)
131			goto dimerr;
132			col[i] = datavalue(dp, pt);
133			}
134			errno = 0;
135			setcolor(cval, funvalue(sa[0], 3, col),
136			funvalue(sa[1], 3, col),
137			funvalue(sa[2], 3, col));
138			if (errno)
139			goto computerr;
140			multcolor(r->pcol, cval);
141			return;
142
143			dimerr:
144			objerror(m, USER, "dimension error");
145
146			computerr:
147			objerror(m, WARNING, "compute error");
148			return;
149			}
150
151
152			p_pdata(m, r) /* interpolate picture data */
153			register OBJREC *m;
154			RAY *r;
155			{
156			extern double varvalue(), funvalue(), datavalue();
157			extern int errno;
158			int i;
159			double col[3];
160			COLOR cval;
161			double pt[2];
162			DATARRAY *dp;
163			register char **sa;
164
165			setfunc(m, r);
166
167			sa = m->oargs.sarg;
168
169			if (m->oargs.nsargs < 7)
170			objerror(m, USER, "bad # arguments");
171	greg	1.5	funcfile(sa[4]);
172	greg	1.4	errno = 0;
173			pt[1] = varvalue(sa[5]); /* y major ordering */
174			pt[0] = varvalue(sa[6]);
175			if (errno)
176			goto computerr;
177	greg	1.1	dp = getpict(sa[3]);
178			for (i = 0; i < 3; i++)
179			col[i] = datavalue(dp+i, pt);
180			errno = 0;
181			setcolor(cval, funvalue(sa[0], 3, col),
182			funvalue(sa[1], 3, col),
183			funvalue(sa[2], 3, col));
184			if (errno)
185			goto computerr;
186			multcolor(r->pcol, cval);
187			return;
188
189			computerr:
190			objerror(m, WARNING, "compute error");
191			return;
192			}