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/* Copyright (c) 1992 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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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* func.c - interface to calcomp functions. |
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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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* 4/7/86 |
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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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#define INITFILE "rayinit.cal" |
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#define REFVNAME "`FILE_REFCNT" |
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#define CALSUF ".cal" |
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#define LCALSUF 4 |
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char REFVNAME[] = "`FILE_REFCNT"; |
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|
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XF unitxf = { /* identity transform */ |
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1.0, 0.0, 0.0, 0.0, |
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0.0, 1.0, 0.0, 0.0, |
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0.0, 0.0, 1.0, 0.0, |
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0.0, 0.0, 0.0, 1.0, |
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{{1.0, 0.0, 0.0, 0.0}, |
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{0.0, 1.0, 0.0, 0.0}, |
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{0.0, 0.0, 1.0, 0.0}, |
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{0.0, 0.0, 0.0, 1.0}}, |
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1.0 |
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}; |
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|
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getfunc(m, ff, ef, dofwd) /* get function for this modifier */ |
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OBJREC *m; |
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int ff; |
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unsigned ef; |
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unsigned int ef; |
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int dofwd; |
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{ |
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extern EPNODE *curfunc; |
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static char initfile[] = INITFILE; |
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char sbuf[MAXSTR]; |
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register char **arg; |
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/* check to see if done already */ |
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if ((f = (MFUNC *)m->os) != NULL) |
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return(f); |
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fobj = NULL; fray = NULL; |
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if (initfile[0]) { /* initialize on first call */ |
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esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_RCONST|E_REDEFW; |
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esupport &= ~(E_OUTCHAN); |
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setcontext(""); |
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scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0); |
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scompile("Nx=$4;Ny=$5;Nz=$6;", NULL, 0); |
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scompile("Px=$7;Py=$8;Pz=$9;", NULL, 0); |
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scompile("T=$10;Rdot=$11;", NULL, 0); |
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scompile("T=$10;Ts=$25;Rdot=$11;", NULL, 0); |
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scompile("S=$12;Tx=$13;Ty=$14;Tz=$15;", NULL, 0); |
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scompile("Ix=$16;Iy=$17;Iz=$18;", NULL, 0); |
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scompile("Jx=$19;Jy=$20;Jz=$21;", NULL, 0); |
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funset("erf", 1, ':', l_erf); |
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funset("erfc", 1, ':', l_erfc); |
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setnoisefuncs(); |
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setprismfuncs(); |
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loadfunc(initfile); |
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initfile[0] = '\0'; |
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} |
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if (i == 1 && arg[ff][0] == '.') |
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setcontext(f->ctx = ""); /* "." means no file */ |
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else { |
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strcpy(sbuf,arg[ff]); /* file name is context */ |
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strcpy(sbuf,arg[ff]); /* file name is context */ |
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if (i > LCALSUF && !strcmp(sbuf+i-LCALSUF, CALSUF)) |
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sbuf[i-LCALSUF] = '\0'; /* remove suffix */ |
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setcontext(f->ctx = savestr(sbuf)); |
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} |
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void |
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freefunc(m) /* free memory associated with modifier */ |
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OBJREC *m; |
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{ |
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freestr(f->ctx); |
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} |
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if (f->b != &unitxf) |
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free((char *)f->b); |
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free((void *)f->b); |
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if (f->f != NULL && f->f != &unitxf) |
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free((char *)f->f); |
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free((char *)f); |
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free((void *)f->f); |
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free((void *)f); |
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m->os = NULL; |
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} |
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int |
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setfunc(m, r) /* set channels for function call */ |
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OBJREC *m; |
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register RAY *r; |
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{ |
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static long lastrno = -1; |
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static unsigned long lastrno = ~0; |
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register MFUNC *f; |
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/* get function */ |
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if ((f = (MFUNC *)m->os) == NULL) |
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error(m, CONSISTENCY, "setfunc called before getfunc"); |
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objerror(m, CONSISTENCY, "setfunc called before getfunc"); |
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/* set evaluator context */ |
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setcontext(f->ctx); |
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/* check to see if matrix set */ |
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} |
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void |
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loadfunc(fname) /* load definition file */ |
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char *fname; |
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{ |
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extern char *libpath; /* library search path */ |
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char *ffname; |
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if ((ffname = getpath(fname, libpath, R_OK)) == NULL) { |
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if ((ffname = getpath(fname, getlibpath(), R_OK)) == NULL) { |
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sprintf(errmsg, "cannot find function file \"%s\"", fname); |
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error(USER, errmsg); |
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} |
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static double |
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l_arg() /* return nth real argument */ |
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{ |
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extern double argument(); |
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register int n; |
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if (fobj == NULL) |
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syntax("arg(n) used in constant expression"); |
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|
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n = argument(1) + .5; /* round to integer */ |
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if (n < 1) |
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chanvalue(n) /* return channel n to calcomp */ |
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register int n; |
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{ |
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double sum; |
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register RAY *r; |
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if (fray == NULL) |
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syntax("ray parameter used in constant expression"); |
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if (--n < 0) |
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goto badchan; |
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fray->rop[2]*funcxf.xfm[2][n-6] + |
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funcxf.xfm[3][n-6] ); |
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if (n == 9) { /* distance */ |
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if (n == 9) /* total distance */ |
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return(raydist(fray,PRIMARY) * funcxf.sca); |
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sum = fray->rot; |
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for (r = fray->parent; r != NULL; r = r->parent) |
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sum += r->rot; |
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return(sum * funcxf.sca); |
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|
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} |
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if (n == 10) /* dot product (range [-1,1]) */ |
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return( fray->rod <= -1.0 ? -1.0 : |
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fray->rod >= 1.0 ? 1.0 : |
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if (n < 24) /* k unit vector */ |
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return(funcxf.xfm[2][n-21] / funcxf.sca); |
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if (n == 24) /* single ray (shadow) distance */ |
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return((fray->rot+raydist(fray->parent,SHADOW)) * funcxf.sca); |
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badchan: |
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error(USER, "illegal channel number"); |
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} |
