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/* Copyright (c) 1986 Regents of the University of California */
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#ifndef lint
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static char SCCSid[] = "$SunId$ LBL";
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#endif
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/*
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* p_data.c - routine for stored patterns.
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*
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* 6/4/86
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*/
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#include "ray.h"
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#include "data.h"
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/*
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* A stored pattern can either be brightness or
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* color data. Brightness data is specified as:
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*
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* modifier brightdata name
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* 4+ func dfname vfname v0 v1 .. xf
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* 0
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* n A1 A2 ..
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*
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* Color data is specified as:
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*
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* modifier colordata name
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* 8+ rfunc gfunc bfunc rdfname gdfname bdfname vfname v0 v1 .. xf
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* 0
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* n A1 A2 ..
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*
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* Color picture data is specified as:
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*
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* modifier colorpict name
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* 7+ rfunc gfunc bfunc pfname vfname vx vy xf
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* 0
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* n A1 A2 ..
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*
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* Vfname is the name of the file where the variable definitions
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* can be found. The list of real arguments can be accessed by
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* definitions in the file. The dfnames are the data file
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* names. The dimensions of the data files and the number
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* of variables must match. The funcs take a single argument
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* for brightdata, and three for colordata and colorpict to produce
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* interpolated values from the file. The xf is a transformation
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* to get from the original coordinates to the current coordinates.
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*/
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p_bdata(m, r) /* interpolate brightness data */
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register OBJREC *m;
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RAY *r;
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{
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extern double varvalue(), funvalue(), datavalue();
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extern int errno;
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int nv;
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double bval;
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double pt[MAXDIM];
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DATARRAY *dp;
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register char **sa;
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setfunc(m, r);
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sa = m->oargs.sarg;
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if (m->oargs.nsargs < 4)
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objerror(m, USER, "bad # arguments");
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if (!vardefined(sa[3]))
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loadfunc(sa[2]);
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for (nv = 0; nv+3 < m->oargs.nsargs &&
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sa[nv+3][0] != '-'; nv++) {
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if (nv >= MAXDIM)
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goto dimerr;
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errno = 0;
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pt[nv] = varvalue(sa[nv+3]);
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if (errno)
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goto computerr;
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}
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dp = getdata(sa[1]);
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if (dp->nd != nv)
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goto dimerr;
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bval = datavalue(dp, pt);
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errno = 0;
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bval = funvalue(sa[0], 1, &bval);
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if (errno)
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goto computerr;
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scalecolor(r->pcol, bval);
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return;
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dimerr:
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objerror(m, USER, "dimension error");
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computerr:
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objerror(m, WARNING, "compute error");
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return;
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}
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p_cdata(m, r) /* interpolate color data */
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register OBJREC *m;
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RAY *r;
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{
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extern double varvalue(), funvalue(), datavalue();
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extern int errno;
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int i, nv;
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double col[3];
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COLOR cval;
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double pt[MAXDIM];
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DATARRAY *dp;
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register char **sa;
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setfunc(m, r);
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sa = m->oargs.sarg;
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if (m->oargs.nsargs < 8)
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objerror(m, USER, "bad # arguments");
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if (!vardefined(sa[7]))
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loadfunc(sa[6]);
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for (nv = 0; nv+7 < m->oargs.nsargs &&
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sa[nv+7][0] != '-'; nv++) {
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if (nv >= MAXDIM)
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goto dimerr;
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errno = 0;
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pt[nv] = varvalue(sa[nv+7]);
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if (errno)
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goto computerr;
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}
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for (i = 0; i < 3; i++) {
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dp = getdata(sa[i+3]);
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if (dp->nd != nv)
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goto dimerr;
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col[i] = datavalue(dp, pt);
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}
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errno = 0;
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setcolor(cval, funvalue(sa[0], 3, col),
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funvalue(sa[1], 3, col),
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funvalue(sa[2], 3, col));
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if (errno)
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goto computerr;
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multcolor(r->pcol, cval);
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return;
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dimerr:
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objerror(m, USER, "dimension error");
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computerr:
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objerror(m, WARNING, "compute error");
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return;
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}
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p_pdata(m, r) /* interpolate picture data */
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register OBJREC *m;
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RAY *r;
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{
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extern double varvalue(), funvalue(), datavalue();
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extern int errno;
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int i;
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double col[3];
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COLOR cval;
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double pt[2];
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DATARRAY *dp;
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register char **sa;
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setfunc(m, r);
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sa = m->oargs.sarg;
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if (m->oargs.nsargs < 7)
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objerror(m, USER, "bad # arguments");
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if (!vardefined(sa[5]))
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loadfunc(sa[4]);
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for (i = 0; i < 2; i++) {
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errno = 0;
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pt[i] = varvalue(sa[i+5]);
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if (errno)
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goto computerr;
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}
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dp = getpict(sa[3]);
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for (i = 0; i < 3; i++)
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col[i] = datavalue(dp+i, pt);
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errno = 0;
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setcolor(cval, funvalue(sa[0], 3, col),
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funvalue(sa[1], 3, col),
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funvalue(sa[2], 3, col));
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if (errno)
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goto computerr;
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multcolor(r->pcol, cval);
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return;
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computerr:
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objerror(m, WARNING, "compute error");
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return;
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}
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