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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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* 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 "copyright.h" |
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|
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#include "ray.h" |
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|
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#include "paths.h" |
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#include "otypes.h" |
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|
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#include "func.h" |
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|
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|
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static OBJREC *fobj = NULL; /* current function object */ |
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static RAY *fray = NULL; /* current function ray */ |
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|
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static double l_erf(), l_erfc(), l_arg(); |
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static double l_erf(char *), l_erfc(char *), l_arg(char *); |
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|
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|
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MFUNC * |
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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 int ef; |
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int dofwd; |
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extern MFUNC * |
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getfunc( /* get function for this modifier */ |
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OBJREC *m, |
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int ff, |
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unsigned int ef, |
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int dofwd |
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> |
) |
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{ |
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static char initfile[] = INITFILE; |
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char sbuf[MAXSTR]; |
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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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scompile("Kx=$22;Ky=$23;Kz=$24;", NULL, 0); |
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scompile("Lu=$26;Lv=$27;", NULL, 0); |
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funset("arg", 1, '=', l_arg); |
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funset("erf", 1, ':', l_erf); |
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funset("erfc", 1, ':', l_erfc); |
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objerror(m, USER, "too few string arguments"); |
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memerr: |
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error(SYSTEM, "out of memory in getfunc"); |
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return NULL; /* pro forma return */ |
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} |
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|
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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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> |
extern void |
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freefunc( /* free memory associated with modifier */ |
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OBJREC *m |
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) |
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{ |
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register MFUNC *f; |
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register int i; |
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} |
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|
|
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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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> |
extern int |
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> |
setfunc( /* 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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|
{ |
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static unsigned long lastrno = ~0; |
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> |
static RNUMBER 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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funcxf.sca = r->rox->b.sca * f->b->sca; |
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multmat4(funcxf.xfm, r->rox->b.xfm, f->b->xfm); |
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} else |
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copystruct(&funcxf, &r->rox->b); |
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funcxf = r->rox->b; |
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else |
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copystruct(&funcxf, f->b); |
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> |
funcxf = *(f->b); |
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lastrno = r->rno; |
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|
eclock++; /* notify expression evaluator */ |
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return(1); |
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|
} |
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|
|
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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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> |
extern void |
201 |
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loadfunc( /* load definition file */ |
202 |
> |
char *fname |
203 |
> |
) |
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|
{ |
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|
char *ffname; |
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|
|
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if ((ffname = getpath(fname, getlibpath(), R_OK)) == NULL) { |
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if ((ffname = getpath(fname, getrlibpath(), 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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|
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|
|
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|
static double |
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l_arg() /* return nth real argument */ |
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l_arg(char *nm) /* return nth real argument */ |
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|
{ |
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|
register int n; |
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|
|
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|
|
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|
|
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|
static double |
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< |
l_erf() /* error function */ |
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l_erf(char *nm) /* error function */ |
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|
{ |
289 |
– |
extern double erf(); |
290 |
– |
|
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|
return(erf(argument(1))); |
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|
} |
241 |
|
|
242 |
|
|
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|
static double |
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l_erfc() /* cumulative error function */ |
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> |
l_erfc(char *nm) /* cumulative error function */ |
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|
{ |
298 |
– |
extern double erfc(); |
299 |
– |
|
246 |
|
return(erfc(argument(1))); |
247 |
|
} |
248 |
|
|
249 |
|
|
250 |
< |
double |
251 |
< |
chanvalue(n) /* return channel n to calcomp */ |
252 |
< |
register int n; |
250 |
> |
extern double |
251 |
> |
chanvalue( /* return channel n to calcomp */ |
252 |
> |
register int n |
253 |
> |
) |
254 |
|
{ |
255 |
|
if (fray == NULL) |
256 |
|
syntax("ray parameter used in constant expression"); |
258 |
|
if (--n < 0) |
259 |
|
goto badchan; |
260 |
|
|
261 |
< |
if (n < 3) /* ray direction */ |
261 |
> |
if (n <= 2) /* ray direction */ |
262 |
|
|
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|
return( ( fray->rdir[0]*funcxf.xfm[0][n] + |
264 |
|
fray->rdir[1]*funcxf.xfm[1][n] + |
265 |
|
fray->rdir[2]*funcxf.xfm[2][n] ) |
266 |
|
/ funcxf.sca ); |
267 |
|
|
268 |
< |
if (n < 6) /* surface normal */ |
268 |
> |
if (n <= 5) /* surface normal */ |
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|
|
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|
return( ( fray->ron[0]*funcxf.xfm[0][n-3] + |
271 |
|
fray->ron[1]*funcxf.xfm[1][n-3] + |
272 |
|
fray->ron[2]*funcxf.xfm[2][n-3] ) |
273 |
|
/ funcxf.sca ); |
274 |
|
|
275 |
< |
if (n < 9) /* intersection */ |
275 |
> |
if (n <= 8) /* intersection */ |
276 |
|
|
277 |
|
return( fray->rop[0]*funcxf.xfm[0][n-6] + |
278 |
|
fray->rop[1]*funcxf.xfm[1][n-6] + |
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|
if (n == 11) /* scale */ |
291 |
|
return(funcxf.sca); |
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|
|
293 |
< |
if (n < 15) /* origin */ |
293 |
> |
if (n <= 14) /* origin */ |
294 |
|
return(funcxf.xfm[3][n-12]); |
295 |
|
|
296 |
< |
if (n < 18) /* i unit vector */ |
296 |
> |
if (n <= 17) /* i unit vector */ |
297 |
|
return(funcxf.xfm[0][n-15] / funcxf.sca); |
298 |
|
|
299 |
< |
if (n < 21) /* j unit vector */ |
300 |
< |
return(funcxf.xfm[1][n-15] / funcxf.sca); |
299 |
> |
if (n <= 20) /* j unit vector */ |
300 |
> |
return(funcxf.xfm[1][n-18] / funcxf.sca); |
301 |
|
|
302 |
< |
if (n < 24) /* k unit vector */ |
302 |
> |
if (n <= 23) /* k unit vector */ |
303 |
|
return(funcxf.xfm[2][n-21] / funcxf.sca); |
304 |
|
|
305 |
|
if (n == 24) /* single ray (shadow) distance */ |
306 |
|
return((fray->rot+raydist(fray->parent,SHADOW)) * funcxf.sca); |
307 |
+ |
|
308 |
+ |
if (n <= 26) /* local (u,v) coordinates */ |
309 |
+ |
return(fray->uv[n-25]); |
310 |
|
badchan: |
311 |
|
error(USER, "illegal channel number"); |
312 |
+ |
return(0.0); |
313 |
|
} |