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#include "ray.h" |
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#include "otypes.h" |
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#include "rtotypes.h" |
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+ |
#include "pmapmat.h" |
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|
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/* |
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* This definition of glass provides for a quick calculation |
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#define RINDEX 1.52 /* refractive index of glass */ |
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| 44 |
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|
| 45 |
< |
extern int |
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> |
int |
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m_glass( /* color a ray which hit a thin glass surface */ |
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OBJREC *m, |
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< |
register RAY *r |
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> |
RAY *r |
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) |
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{ |
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COLOR mcolor; |
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double pdot; |
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FVECT pnorm; |
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< |
double rindex, cos2; |
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> |
double rindex=0, cos2; |
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COLOR trans, refl; |
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int hastexture, hastrans; |
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double d, r1e, r1m; |
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double transtest, transdist; |
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double mirtest, mirdist; |
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RAY p; |
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< |
register int i; |
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> |
int i; |
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> |
|
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> |
/* PMAP: skip refracted shadow or ambient ray if accounted for in |
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> |
photon map */ |
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> |
if (shadowRayInPmap(r) || ambRayInPmap(r)) |
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> |
return(1); |
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/* check arguments */ |
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if (m->oargs.nfargs == 3) |
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rindex = RINDEX; /* default value of n */ |
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rindex = m->oargs.farg[3]; /* use their value */ |
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else |
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objerror(m, USER, "bad arguments"); |
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+ |
/* check back face visibility */ |
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+ |
if (!backvis && r->rod <= 0.0) { |
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+ |
raytrans(r); |
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+ |
return(1); |
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+ |
} |
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/* check transmission */ |
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setcolor(mcolor, m->oargs.farg[0], m->oargs.farg[1], m->oargs.farg[2]); |
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if ((hastrans = (intens(mcolor) > 1e-15))) { |
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multcolor(trans, r->pcol); /* modify by pattern */ |
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/* transmitted ray */ |
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if (rayorigin(&p, TRANS, r, trans) == 0) { |
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< |
if (!(r->crtype & SHADOW) && hastexture) { |
| 126 |
< |
for (i = 0; i < 3; i++) /* perturb direction */ |
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< |
p.rdir[i] = r->rdir[i] + |
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< |
2.*(1.-rindex)*r->pert[i]; |
| 125 |
> |
if (!(r->crtype & (SHADOW|AMBIENT)) && hastexture) { |
| 126 |
> |
VSUM(p.rdir, r->rdir, r->pert, 2.*(1.-rindex)); |
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if (normalize(p.rdir) == 0.0) { |
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objerror(m, WARNING, "bad perturbation"); |
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VCOPY(p.rdir, r->rdir); |
| 152 |
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} |
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/* reflected ray */ |
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if (rayorigin(&p, REFLECTED, r, refl) == 0) { |
| 155 |
< |
for (i = 0; i < 3; i++) |
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< |
p.rdir[i] = r->rdir[i] + 2.0*pdot*pnorm[i]; |
| 155 |
> |
VSUM(p.rdir, r->rdir, pnorm, 2.*pdot); |
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|
checknorm(p.rdir); |
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rayvalue(&p); |
| 158 |
|
multcolor(p.rcol, p.rcoef); |
| 159 |
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addcolor(r->rcol, p.rcol); |
| 160 |
< |
if (!hastexture && r->ro != NULL && isflat(r->ro->otype)) { |
| 160 |
> |
if (r->ro != NULL && isflat(r->ro->otype) && |
| 161 |
> |
!hastexture | (r->crtype & AMBIENT)) { |
| 162 |
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mirtest = 2.0*bright(p.rcol); |
| 163 |
|
mirdist = r->rot + p.rt; |
| 164 |
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} |
