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* Routines for mirror material supporting 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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> |
#include "copyright.h" |
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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 "rtotypes.h" |
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#include "source.h" |
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|
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/* |
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* part of the direct calculation. |
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*/ |
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|
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+ |
static int mir_proj(MAT4 pm, OBJREC *o, SRCREC *s, int n); |
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+ |
static void mirrorproj(MAT4 m, FVECT nv, double offs); |
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|
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– |
static int mir_proj(), mirrorproj(); |
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– |
|
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VSMATERIAL mirror_vs = {mir_proj, 1}; |
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|
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|
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int |
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m_mirror(m, r) /* shade mirrored ray */ |
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register OBJREC *m; |
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register RAY *r; |
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> |
m_mirror( /* shade mirrored ray */ |
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> |
OBJREC *m, |
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> |
RAY *r |
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) |
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{ |
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COLOR mcolor; |
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RAY nr; |
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int rpure = 1; |
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register int i; |
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> |
int i; |
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/* check arguments */ |
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if (m->oargs.nfargs != 3 || m->oargs.nsargs > 1) |
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objerror(m, USER, "bad number of arguments"); |
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/* check for substitute material */ |
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< |
if (m->oargs.nsargs > 0 && |
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< |
(r->rsrc < 0 || source[r->rsrc].so != r->ro)) { |
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> |
/* but avoid double-counting */ |
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> |
if ( m->oargs.nsargs > 0 && |
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> |
(r->rsrc < 0 || source[r->rsrc].so != r->ro) && |
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> |
!(r->crtype & (AMBIENT|SPECULAR) && r->rod > 0.) ) { |
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if (!strcmp(m->oargs.sarg[0], VOIDID)) { |
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raytrans(r); |
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return(1); |
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if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
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return(1); |
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|
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< |
if (r->rod < 0.) /* back is black */ |
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> |
if (r->rod < 0.) { /* back is black */ |
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> |
if (!backvis) |
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> |
raytrans(r); /* unless back visibility is off */ |
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return(1); |
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+ |
} |
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/* get modifiers */ |
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raytexture(r, m->omod); |
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/* assign material color */ |
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multcolor(mcolor, r->pcol); |
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/* compute reflected ray */ |
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if (r->rsrc >= 0) { /* relayed light source */ |
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< |
rayorigin(&nr, r, REFLECTED, 1.); |
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> |
rayorigin(&nr, REFLECTED, r, mcolor); |
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/* ignore textures */ |
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for (i = 0; i < 3; i++) |
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nr.rdir[i] = r->rdir[i] + 2.*r->rod*r->ron[i]; |
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FVECT pnorm; |
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double pdot; |
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|
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< |
if (rayorigin(&nr, r, REFLECTED, bright(mcolor)) < 0) |
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> |
if (rayorigin(&nr, REFLECTED, r, mcolor) < 0) |
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|
return(1); |
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< |
if (DOT(r->pert,r->pert) > FTINY*FTINY) { |
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> |
if (!(r->crtype & AMBIENT) && |
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> |
DOT(r->pert,r->pert) > FTINY*FTINY) { |
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|
pdot = raynormal(pnorm, r); /* use textures */ |
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for (i = 0; i < 3; i++) |
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|
nr.rdir[i] = r->rdir[i] + 2.*pdot*pnorm[i]; |
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|
for (i = 0; i < 3; i++) |
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|
nr.rdir[i] = r->rdir[i] + 2.*r->rod*r->ron[i]; |
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|
} |
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+ |
checknorm(nr.rdir); |
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|
rayvalue(&nr); |
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< |
multcolor(nr.rcol, mcolor); |
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> |
multcolor(nr.rcol, nr.rcoef); |
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> |
copycolor(r->mcol, nr.rcol); |
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|
addcolor(r->rcol, nr.rcol); |
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+ |
r->rmt = r->rot; |
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if (rpure && r->ro != NULL && isflat(r->ro->otype)) |
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< |
r->rt = r->rot + nr.rt; |
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> |
r->rmt += r->rot + raydistance(&nr); |
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|
return(1); |
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|
} |
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|
|
| 109 |
|
|
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|
static int |
| 111 |
< |
mir_proj(pm, o, s, n) /* compute a mirror's projection */ |
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< |
MAT4 pm; |
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< |
register OBJREC *o; |
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< |
SRCREC *s; |
| 115 |
< |
int n; |
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> |
mir_proj( /* compute a mirror's projection */ |
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> |
MAT4 pm, |
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> |
OBJREC *o, |
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> |
SRCREC *s, |
| 115 |
> |
int n |
| 116 |
> |
) |
| 117 |
|
{ |
| 118 |
+ |
double corr = 1.; |
| 119 |
|
FVECT nv, sc; |
| 120 |
< |
double od; |
| 121 |
< |
register int i, j; |
| 120 |
> |
double od, offs; |
| 121 |
> |
int i; |
| 122 |
|
/* get surface normal and offset */ |
| 123 |
< |
od = getplaneq(nv, o); |
| 124 |
< |
/* check for extreme point for behind */ |
| 123 |
> |
offs = od = getplaneq(nv, o); |
| 124 |
> |
if (s->sflags & SDISTANT) |
| 125 |
> |
offs = 0.; |
| 126 |
> |
/* check for extreme point behind */ |
| 127 |
> |
if (s->sflags & SCIR) { |
| 128 |
> |
if (s->sflags & (SFLAT|SDISTANT)) |
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> |
corr = 1.12837917; /* correct setflatss() */ |
| 130 |
> |
else |
| 131 |
> |
corr = 1.0/0.7236; /* correct sphsetsrc() */ |
| 132 |
> |
} |
| 133 |
|
VCOPY(sc, s->sloc); |
| 134 |
|
for (i = s->sflags & SFLAT ? SV : SW; i >= 0; i--) |
| 135 |
< |
if (DOT(nv, s->ss[i]) > 0.) |
| 136 |
< |
for (j = 0; j < 3; j++) |
| 173 |
< |
sc[j] += s->ss[i][j]; |
| 135 |
> |
if (DOT(nv, s->ss[i]) > offs) |
| 136 |
> |
VSUM(sc, sc, s->ss[i], corr); |
| 137 |
|
else |
| 138 |
< |
for (j = 0; j < 3; j++) |
| 139 |
< |
sc[j] -= s->ss[i][j]; |
| 177 |
< |
if (DOT(sc, nv) <= (s->sflags & SDISTANT ? FTINY : od+FTINY)) |
| 138 |
> |
VSUM(sc, sc, s->ss[i], -corr); |
| 139 |
> |
if (DOT(sc, nv) <= offs+FTINY) |
| 140 |
|
return(0); |
| 141 |
|
/* everything OK -- compute projection */ |
| 142 |
|
mirrorproj(pm, nv, od); |
| 144 |
|
} |
| 145 |
|
|
| 146 |
|
|
| 147 |
< |
static int |
| 148 |
< |
mirrorproj(m, nv, offs) /* get mirror projection for surface */ |
| 149 |
< |
register MAT4 m; |
| 150 |
< |
FVECT nv; |
| 151 |
< |
double offs; |
| 147 |
> |
static void |
| 148 |
> |
mirrorproj( /* get mirror projection for surface */ |
| 149 |
> |
MAT4 m, |
| 150 |
> |
FVECT nv, |
| 151 |
> |
double offs |
| 152 |
> |
) |
| 153 |
|
{ |
| 154 |
< |
register int i, j; |
| 154 |
> |
int i, j; |
| 155 |
|
/* assign matrix */ |
| 156 |
|
setident4(m); |
| 157 |
|
for (j = 0; j < 3; j++) { |
