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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* mx_data.c - routine for stored mixtures. |
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*/ |
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|
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/* ==================================================================== |
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* The Radiance Software License, Version 1.0 |
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* |
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* 11/2/88 |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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*/ |
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#include "ray.h" |
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#include "func.h" |
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/* |
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* A stored mixture is specified: |
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* A stored mixture is specified: |
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* |
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* modifier mixdata name |
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* 6+ foremod backmod 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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* A picture mixture is specified as: |
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* |
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* modifier mixpict name |
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* 7+ foremod backmod func 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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* |
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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. Dfname is the data file. |
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* (Pfname is a picture file.) |
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* The dimensions of the data files and the number |
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* of variables must match. The func is a single argument |
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* function which returns the corrected data value given the |
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* function in the case of mixdata (three argument in the case |
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* of mixpict), which returns the corrected data value given the |
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* interpolated value 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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coef = datavalue(dp, pt); |
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errno = 0; |
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coef = funvalue(m->oargs.sarg[2], 1, &coef); |
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if (errno) |
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goto computerr; |
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if (raymixture(r, mod[0], mod[1], coef)) { |
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if (m->omod != OVOID) |
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objerror(m, USER, "inappropriate modifier"); |
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return(1); |
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} |
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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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|
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|
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mx_pdata(m, r) /* interpolate mixture picture */ |
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register OBJREC *m; |
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RAY *r; |
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{ |
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OBJECT obj; |
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double col[3], coef; |
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double pt[MAXDIM]; |
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DATARRAY *dp; |
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OBJECT mod[2]; |
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register MFUNC *mf; |
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register int i; |
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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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obj = objndx(m); |
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for (i = 0; i < 2; i++) |
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if (!strcmp(m->oargs.sarg[i], VOIDID)) |
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mod[i] = OVOID; |
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else if ((mod[i] = lastmod(obj, m->oargs.sarg[i])) == OVOID) { |
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sprintf(errmsg, "undefined modifier \"%s\"", |
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m->oargs.sarg[i]); |
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objerror(m, USER, errmsg); |
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} |
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dp = getpict(m->oargs.sarg[3]); |
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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) |
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goto computerr; |
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for (i = 0; i < 3; i++) /* get pixel from picture */ |
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col[i] = datavalue(dp+i, pt); |
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errno = 0; /* evaluate function on pixel */ |
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coef = funvalue(m->oargs.sarg[2], 3, col); |
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if (errno) |
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goto computerr; |
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if (raymixture(r, mod[0], mod[1], coef)) { |