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/* Copyright (c) 1991 Regents of the University of California */ |
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|
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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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/* |
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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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|
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#include "ray.h" |
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|
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#include "data.h" |
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|
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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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|
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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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|
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setfunc(m, r); |
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|
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sa = m->oargs.sarg; |
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|
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if (m->oargs.nsargs < 4) |
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objerror(m, USER, "bad # arguments"); |
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funcfile(sa[2]); |
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errno = 0; |
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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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pt[nv] = varvalue(sa[nv+3]); |
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} |
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if (errno) |
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goto computerr; |
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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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|
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dimerr: |
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objerror(m, USER, "dimension error"); |
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|
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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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|
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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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|
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setfunc(m, r); |
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|
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sa = m->oargs.sarg; |
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|
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if (m->oargs.nsargs < 8) |
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objerror(m, USER, "bad # arguments"); |
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funcfile(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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|
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dimerr: |
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objerror(m, USER, "dimension error"); |
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|
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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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|
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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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|
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setfunc(m, r); |
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|
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sa = m->oargs.sarg; |
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|
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if (m->oargs.nsargs < 7) |
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objerror(m, USER, "bad # arguments"); |
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funcfile(sa[4]); |
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errno = 0; |
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pt[1] = varvalue(sa[5]); /* y major ordering */ |
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pt[0] = varvalue(sa[6]); |
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if (errno) |
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goto computerr; |
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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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|
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computerr: |
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objerror(m, WARNING, "compute error"); |
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return; |
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} |
