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#ifndef lint
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static const char RCSid[] = "$Id: p_data.c,v 2.15 2024/03/12 16:54:51 greg Exp $";
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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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#include "copyright.h"
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#include "ray.h"
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#include "data.h"
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#include "func.h"
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#include "rtotypes.h"
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/*
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* A stored pattern can either be brightness,
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* color, or spectral 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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* A simple spectrum is specified as:
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*
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* modifier spectrum name
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* 0
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* 0
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* 5+ nmA nmB s1 s2 s3 ..
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*
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* A constant spectrum from a data file is given as:
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*
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* modifier specfile name
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* 1 dfname
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* 0
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* 0
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*
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* A spectral data file is given as:
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*
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* modifier specdata name
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* 4+ sfunc dfname vfname v0 .. xf
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* 0
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* n A1 A2 ..
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*
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* A spectral image is given as:
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*
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* modifier specpict name
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* 5+ sfunc sfname 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, except for specdata, which has a "hidden"
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* last variable for the wavelength. The funcs take a single argument
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* for brightdata, three for colordata and colorpict, and two for
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* specdata and specpict to modify interpolated values from the file.
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* The xf is a transform spec to get from the original coordinates to
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* the current coordinates.
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*/
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int
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p_bdata( /* interpolate brightness data */
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OBJREC *m,
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RAY *r
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)
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{
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double bval;
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double pt[MAXDDIM];
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DATARRAY *dp;
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MFUNC *mf;
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int i;
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if (m->oargs.nsargs < 4)
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objerror(m, USER, "bad # arguments");
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dp = getdata(m->oargs.sarg[1]);
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i = (1 << dp->nd) - 1;
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mf = getfunc(m, 2, i<<3, 0);
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setfunc(m, r);
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errno = 0;
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for (i = dp->nd; i-- > 0; ) {
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pt[i] = evalue(mf->ep[i]);
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if ((errno == EDOM) | (errno == ERANGE))
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goto computerr;
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}
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bval = datavalue(dp, pt);
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errno = 0;
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bval = funvalue(m->oargs.sarg[0], 1, &bval);
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if ((errno == EDOM) | (errno == ERANGE))
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goto computerr;
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scalescolor(r->pcol, bval);
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return(0);
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computerr:
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objerror(m, WARNING, "compute error");
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return(0);
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}
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int
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p_cdata( /* interpolate color data */
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OBJREC *m,
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RAY *r
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)
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{
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double col[3];
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COLOR cval;
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double pt[MAXDDIM];
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int nv;
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DATARRAY *dp;
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MFUNC *mf;
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int i;
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if (m->oargs.nsargs < 8)
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objerror(m, USER, "bad # arguments");
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dp = getdata(m->oargs.sarg[3]);
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i = (1 << (nv = dp->nd)) - 1;
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mf = getfunc(m, 6, i<<7, 0);
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setfunc(m, r);
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errno = 0;
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for (i = 0; i < nv; i++) {
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pt[i] = evalue(mf->ep[i]);
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if ((errno == EDOM) | (errno == ERANGE))
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goto computerr;
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}
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col[0] = datavalue(dp, pt);
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for (i = 1; i < 3; i++) {
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if (!strcmp(m->oargs.sarg[3+i], m->oargs.sarg[3])) {
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col[i] = col[0]; /* same data */
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continue;
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}
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dp = getdata(m->oargs.sarg[3+i]);
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if (dp->nd != nv)
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objerror(m, USER, "dimension error");
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col[i] = datavalue(dp, pt);
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}
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errno = 0;
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for (i = 0; i < 3; i++)
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if (i && fundefined(m->oargs.sarg[i]) < 3)
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colval(cval,i) = funvalue(m->oargs.sarg[i], 1, col+i);
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else
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colval(cval,i) = funvalue(m->oargs.sarg[i], 3, col);
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if ((errno == EDOM) | (errno == ERANGE))
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goto computerr;
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smultcolor(r->pcol, cval);
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return(0);
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computerr:
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objerror(m, WARNING, "compute error");
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return(0);
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}
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int
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p_pdata( /* interpolate picture data */
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OBJREC *m,
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RAY *r
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)
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{
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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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MFUNC *mf;
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int i;
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if (m->oargs.nsargs < 7)
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objerror(m, USER, "bad # arguments");
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mf = getfunc(m, 4, 0x3<<5, 0);
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setfunc(m, r);
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errno = 0;
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pt[1] = evalue(mf->ep[0]); /* y major ordering */
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pt[0] = evalue(mf->ep[1]);
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if ((errno == EDOM) | (errno == ERANGE))
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goto computerr;
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dp = getpict(m->oargs.sarg[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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for (i = 0; i < 3; i++)
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if (i && fundefined(m->oargs.sarg[i]) < 3)
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colval(cval,i) = funvalue(m->oargs.sarg[i], 1, col+i);
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else
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colval(cval,i) = funvalue(m->oargs.sarg[i], 3, col);
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if ((errno == EDOM) | (errno == ERANGE))
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goto computerr;
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smultcolor(r->pcol, cval);
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return(0);
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computerr:
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objerror(m, WARNING, "compute error");
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return(0);
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}
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int
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p_spectrum( /* simple constant spectrum */
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OBJREC *m,
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RAY *r
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)
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{
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COLORV *scval;
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if ((scval = (COLORV *)m->os) == NULL) {
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COLORV *sinp;
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double hstep;
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int i;
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if (m->oargs.nfargs < 5)
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objerror(m, USER, "bad # arguments");
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sinp = (COLORV *)malloc(sizeof(COLORV)*(m->oargs.nfargs-2));
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scval = (COLORV *)malloc(sizeof(COLORV)*NCSAMP);
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if ((sinp == NULL) | (scval == NULL))
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objerror(m, SYSTEM, "out of memory");
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for (i = m->oargs.nfargs-2; i--; )
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sinp[i] = (COLORV)m->oargs.farg[i+2];
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hstep = 0.5 * (m->oargs.farg[1] - m->oargs.farg[0]) /
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(m->oargs.nfargs-3.0);
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convertscolorcol(scval, sinp, m->oargs.nfargs-2,
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m->oargs.farg[0]-hstep, m->oargs.farg[1]+hstep);
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free(sinp);
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m->os = (void *)scval;
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}
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smultscolor(r->pcol, scval);
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return(0);
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}
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int
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p_specfile( /* constant spectrum from 1-D data file */
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OBJREC *m,
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RAY *r
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)
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{
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COLORV *scval;
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if ((scval = (COLORV *)m->os) == NULL) {
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DATARRAY *dp;
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COLORV *sinp;
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int n;
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double step;
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if (m->oargs.nsargs != 1)
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objerror(m, USER, "bad # arguments");
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dp = getdata(m->oargs.sarg[0]);
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if (dp->nd != 1)
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objerror(m, USER, "data file must be 1-dimensional");
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n = (dp->dim[0].p == NULL) ? dp->dim[0].ne : 2*dp->dim[0].ne;
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sinp = (COLORV *)malloc(sizeof(COLORV)*n);
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scval = (COLORV *)malloc(sizeof(COLORV)*NCSAMP);
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if ((sinp == NULL) | (scval == NULL))
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objerror(m, SYSTEM, "out of memory");
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step = dp->dim[0].siz / (n - 1.0);
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while (n--) {
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double wl = dp->dim[0].org + n*step;
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sinp[n] = (COLORV)datavalue(dp, &wl);
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}
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convertscolorcol(scval, sinp, dp->dim[0].ne,
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dp->dim[0].org-.5*step,
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dp->dim[0].org+dp->dim[0].siz+.5*step);
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free(sinp);
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m->os = (void *)scval;
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}
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smultscolor(r->pcol, scval);
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return(0);
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}
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int
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p_specdata( /* varied spectrum from (N+1)-D file */
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OBJREC *m,
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RAY *r
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| 287 |
)
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| 288 |
{
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| 289 |
SCOLOR scval;
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| 290 |
COLORV *scdat;
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| 291 |
double pt[MAXDDIM];
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| 292 |
DATARRAY *dp;
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MFUNC *mf;
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double step;
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int i;
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if (m->oargs.nsargs < 4)
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objerror(m, USER, "bad # arguments");
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dp = getdata(m->oargs.sarg[1]);
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if (dp->nd < 2)
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objerror(m, USER, "need at least 2-dimensional data");
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i = (1 << (dp->nd-1)) - 1;
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mf = getfunc(m, 2, i<<3, 0);
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setfunc(m, r);
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errno = 0;
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| 306 |
for (i = dp->nd-1; i-- > 0; ) {
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| 307 |
pt[i] = evalue(mf->ep[i]);
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| 308 |
if ((errno == EDOM) | (errno == ERANGE))
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| 309 |
goto computerr;
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}
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| 311 |
dp = datavector(dp, pt); /* interpolate spectrum */
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| 312 |
step = dp->dim[0].siz / (dp->dim[0].ne - 1.0);
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| 313 |
scdat = (COLORV *)malloc(sizeof(COLORV)*dp->dim[0].ne);
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| 314 |
if (scdat == NULL)
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| 315 |
objerror(m, SYSTEM, "out of memory");
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for (i = dp->dim[0].ne; i-- > 0; ) {
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pt[1] = dp->dim[0].org + i*step;
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pt[0] = datavalue(dp, pt+1);
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errno = 0;
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scdat[i] = funvalue(m->oargs.sarg[0], 2, pt);
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| 321 |
if ((errno == EDOM) | (errno == ERANGE))
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| 322 |
goto computerr;
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}
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| 324 |
convertscolorcol(scval, scdat, dp->dim[0].ne,
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| 325 |
dp->dim[0].org-.5*step,
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dp->dim[0].org+dp->dim[0].siz+.5*step);
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free(scdat);
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free(dp);
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smultscolor(r->pcol, scval);
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return(0);
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| 331 |
computerr:
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objerror(m, WARNING, "compute error");
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return(0);
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| 334 |
}
|
| 335 |
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| 336 |
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int
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p_specpict( /* interpolate hyperspectral image data */
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| 339 |
OBJREC *m,
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| 340 |
RAY *r
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| 341 |
)
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| 342 |
{
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| 343 |
SCOLOR scdat, scval;
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| 344 |
double pt[2];
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| 345 |
DATARRAY *dp;
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| 346 |
MFUNC *mf;
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| 347 |
double step;
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| 348 |
int i;
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| 349 |
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| 350 |
if (m->oargs.nsargs < 5)
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| 351 |
objerror(m, USER, "bad # arguments");
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| 352 |
mf = getfunc(m, 2, 0x3<<3, 0);
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| 353 |
setfunc(m, r);
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| 354 |
errno = 0;
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| 355 |
pt[1] = evalue(mf->ep[0]); /* y major ordering */
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| 356 |
pt[0] = evalue(mf->ep[1]);
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| 357 |
if ((errno == EDOM) | (errno == ERANGE))
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| 358 |
goto computerr;
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| 359 |
/* interpolate spectrum */
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| 360 |
dp = datavector(getspec(m->oargs.sarg[1]), pt);
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| 361 |
step = dp->dim[0].siz / (dp->dim[0].ne - 1.0);
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| 362 |
for (i = dp->dim[0].ne; i-- > 0; ) {
|
| 363 |
pt[1] = dp->dim[0].org + i*step;
|
| 364 |
pt[0] = dp->arr.d[i]; /* datavalue(dp, pt+1); */
|
| 365 |
errno = 0;
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| 366 |
scdat[i] = funvalue(m->oargs.sarg[0], 2, pt);
|
| 367 |
if ((errno == EDOM) | (errno == ERANGE))
|
| 368 |
goto computerr;
|
| 369 |
}
|
| 370 |
convertscolorcol(scval, scdat, dp->dim[0].ne,
|
| 371 |
dp->dim[0].org-.5*step,
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| 372 |
dp->dim[0].org+dp->dim[0].siz+.5*step);
|
| 373 |
free(dp);
|
| 374 |
smultscolor(r->pcol, scval);
|
| 375 |
return(0);
|
| 376 |
computerr:
|
| 377 |
objerror(m, WARNING, "compute error");
|
| 378 |
return(0);
|
| 379 |
}
|
