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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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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* Routines for light-redirecting materials and |
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* their associated virtual light sources |
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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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|
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#include "ray.h" |
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|
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#include "otypes.h" |
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|
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#include "source.h" |
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|
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#include "func.h" |
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|
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/* |
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* The arguments for MAT_DIRECT1 are: |
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* |
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*/ |
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|
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|
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extern double varvalue(); |
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static int dir_proj(); |
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|
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int dir_proj(); |
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VSMATERIAL direct1_vs = {dir_proj, 1}; |
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VSMATERIAL direct2_vs = {dir_proj, 2}; |
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|
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#define fndx(m) ((m)->otype == MAT_DIRECT1 ? 4 : 8) |
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#define getdfunc(m) ( (m)->otype == MAT_DIRECT1 ? \ |
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getfunc(m, 4, 0xf, 1) : \ |
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getfunc(m, 8, 0xff, 1) ) |
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|
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|
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static |
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dir_check(m) /* check arguments and load function file */ |
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register OBJREC *m; |
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{ |
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register FULLXF *mxf; |
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register int ff; |
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|
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ff = fndx(m)+1; |
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if (ff > m->oargs.nsargs) |
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objerror(m, USER, "too few arguments"); |
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if (m->os == NULL) { |
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mxf = (FULLXF *)malloc(sizeof(FULLXF)); |
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if (mxf == NULL) |
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error(SYSTEM, "out of memory in dir_check"); |
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if (fullxf(mxf, m->oargs.nsargs-ff, m->oargs.sarg+ff) != |
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m->oargs.nsargs-ff) |
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objerror(m, USER, "bad transform"); |
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if (mxf->f.sca < 0.0) |
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mxf->f.sca = -mxf->f.sca; |
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if (mxf->b.sca < 0.0) |
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mxf->b.sca = -mxf->b.sca; |
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m->os = (char *)mxf; |
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} |
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} |
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|
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< |
|
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> |
int |
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m_direct(m, r) /* shade redirected ray */ |
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register OBJREC *m; |
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register RAY *r; |
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{ |
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/* check if source ray */ |
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if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
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< |
return; /* got the wrong guy */ |
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< |
dir_check(m); |
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> |
return(1); /* got the wrong guy */ |
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/* compute first projection */ |
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if (m->otype == MAT_DIRECT1 || |
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(r->rsrc < 0 || source[r->rsrc].sa.sv.pn == 0)) |
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if (m->otype == MAT_DIRECT2 && |
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(r->rsrc < 0 || source[r->rsrc].sa.sv.pn == 1)) |
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redirect(m, r, 1); |
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return(1); |
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} |
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|
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|
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int |
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redirect(m, r, n) /* compute n'th ray redirection */ |
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OBJREC *m; |
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RAY *r; |
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int n; |
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{ |
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< |
register char **sa; |
125 |
> |
MFUNC *mf; |
126 |
> |
register EPNODE **va; |
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> |
FVECT nsdir; |
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RAY nr; |
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double coef; |
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register int j; |
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/* set up function */ |
132 |
< |
setmap(m, r, &((FULLXF *)m->os)->b); |
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< |
funcfile(m->oargs.sarg[fndx(m)]); |
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< |
sa = m->oargs.sarg + 4*n; |
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> |
mf = getdfunc(m); |
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> |
setfunc(m, r); |
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/* assign direction variable */ |
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> |
if (r->rsrc >= 0) { |
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> |
register SRCREC *sp = source + source[r->rsrc].sa.sv.sn; |
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> |
|
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> |
if (sp->sflags & SDISTANT) |
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> |
VCOPY(nsdir, sp->sloc); |
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else { |
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for (j = 0; j < 3; j++) |
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nsdir[j] = sp->sloc[j] - r->rop[j]; |
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normalize(nsdir); |
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} |
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multv3(nsdir, nsdir, funcxf.xfm); |
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varset("DxA", '=', nsdir[0]/funcxf.sca); |
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> |
varset("DyA", '=', nsdir[1]/funcxf.sca); |
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> |
varset("DzA", '=', nsdir[2]/funcxf.sca); |
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> |
} else { |
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> |
varset("DxA", '=', 0.0); |
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varset("DyA", '=', 0.0); |
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> |
varset("DzA", '=', 0.0); |
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> |
} |
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/* compute coefficient */ |
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errno = 0; |
156 |
< |
coef = varvalue(sa[0]); |
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> |
va = mf->ep + 4*n; |
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> |
coef = evalue(va[0]); |
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if (errno) |
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goto computerr; |
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if (coef <= FTINY || rayorigin(&nr, r, TRANS, coef) < 0) |
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return(0); |
162 |
< |
/* compute direction */ |
163 |
< |
errno = 0; |
164 |
< |
for (j = 0; j < 3; j++) |
165 |
< |
nr.rdir[j] = varvalue(sa[j+1]); |
166 |
< |
if (errno) |
167 |
< |
goto computerr; |
168 |
< |
multv3(nr.rdir, nr.rdir, ((FULLXF *)m->os)->f.xfm); |
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> |
va++; /* compute direction */ |
163 |
> |
for (j = 0; j < 3; j++) { |
164 |
> |
nr.rdir[j] = evalue(va[j]); |
165 |
> |
if (errno) |
166 |
> |
goto computerr; |
167 |
> |
} |
168 |
> |
if (mf->f != &unitxf) |
169 |
> |
multv3(nr.rdir, nr.rdir, mf->f->xfm); |
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if (r->rox != NULL) |
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multv3(nr.rdir, nr.rdir, r->rox->f.xfm); |
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if (normalize(nr.rdir) == 0.0) |
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|
rayvalue(&nr); |
178 |
|
scalecolor(nr.rcol, coef); |
179 |
|
addcolor(r->rcol, nr.rcol); |
180 |
+ |
if (r->ro != NULL && isflat(r->ro->otype)) |
181 |
+ |
r->rt = r->rot + nr.rt; |
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|
return(1); |
183 |
|
computerr: |
184 |
|
objerror(m, WARNING, "compute error"); |
186 |
|
} |
187 |
|
|
188 |
|
|
189 |
+ |
static int |
190 |
|
dir_proj(pm, o, s, n) /* compute a director's projection */ |
191 |
|
MAT4 pm; |
192 |
|
OBJREC *o; |
194 |
|
int n; |
195 |
|
{ |
196 |
|
RAY tr; |
197 |
< |
register OBJREC *m; |
198 |
< |
char **sa; |
197 |
> |
OBJREC *m; |
198 |
> |
MFUNC *mf; |
199 |
> |
EPNODE **va; |
200 |
|
FVECT cent, newdir, nv, h; |
201 |
< |
double olddot, newdot, od; |
201 |
> |
double coef, olddot, newdot, od; |
202 |
|
register int i, j; |
143 |
– |
/* get material arguments */ |
144 |
– |
m = vsmaterial(o); |
145 |
– |
dir_check(m); |
146 |
– |
sa = m->oargs.sarg + 4*n; |
203 |
|
/* initialize test ray */ |
204 |
|
getmaxdisk(cent, o); |
205 |
|
if (s->sflags & SDISTANT) |
219 |
|
olddot = DOT(tr.rdir, nv); |
220 |
|
if (olddot <= FTINY && olddot >= -FTINY) |
221 |
|
return(0); /* old dir parallels plane */ |
222 |
+ |
tr.rmax = 0.0; |
223 |
|
rayorigin(&tr, NULL, PRIMARY, 1.0); |
224 |
|
if (!(*ofun[o->otype].funp)(o, &tr)) |
225 |
|
return(0); /* no intersection! */ |
226 |
|
/* compute redirection */ |
227 |
< |
setmap(m, &tr, &((FULLXF *)m->os)->b); |
228 |
< |
funcfile(m->oargs.sarg[fndx(m)]); |
227 |
> |
m = vsmaterial(o); |
228 |
> |
mf = getdfunc(m); |
229 |
> |
setfunc(m, &tr); |
230 |
> |
varset("DxA", '=', 0.0); |
231 |
> |
varset("DyA", '=', 0.0); |
232 |
> |
varset("DzA", '=', 0.0); |
233 |
|
errno = 0; |
234 |
< |
if (varvalue(sa[0]) <= FTINY) |
235 |
< |
return(0); /* insignificant */ |
234 |
> |
va = mf->ep + 4*n; |
235 |
> |
coef = evalue(va[0]); |
236 |
|
if (errno) |
237 |
|
goto computerr; |
238 |
< |
for (i = 0; i < 3; i++) |
239 |
< |
newdir[i] = varvalue(sa[i+1]); |
240 |
< |
if (errno) |
241 |
< |
goto computerr; |
242 |
< |
multv3(newdir, newdir, ((FULLXF *)m->os)->f.xfm); |
238 |
> |
if (coef <= FTINY) |
239 |
> |
return(0); /* insignificant */ |
240 |
> |
va++; |
241 |
> |
for (i = 0; i < 3; i++) { |
242 |
> |
newdir[i] = evalue(va[i]); |
243 |
> |
if (errno) |
244 |
> |
goto computerr; |
245 |
> |
} |
246 |
> |
if (mf->f != &unitxf) |
247 |
> |
multv3(newdir, newdir, mf->f->xfm); |
248 |
|
/* normalization unnecessary */ |
249 |
|
newdot = DOT(newdir, nv); |
250 |
|
if (newdot <= FTINY && newdot >= -FTINY) |