52 |
|
FVECT pnorm; |
53 |
|
double rindex, cos2; |
54 |
|
COLOR trans, refl; |
55 |
< |
int hastexture; |
55 |
> |
int hastexture, hastrans; |
56 |
|
double d, r1e, r1m; |
57 |
|
double transtest, transdist; |
58 |
|
double mirtest, mirdist; |
65 |
|
rindex = m->oargs.farg[3]; /* use their value */ |
66 |
|
else |
67 |
|
objerror(m, USER, "bad arguments"); |
68 |
< |
|
68 |
> |
/* check transmission */ |
69 |
|
setcolor(mcolor, m->oargs.farg[0], m->oargs.farg[1], m->oargs.farg[2]); |
70 |
< |
|
70 |
> |
if ((hastrans = (intens(mcolor) > 1e-15))) { |
71 |
> |
for (i = 0; i < 3; i++) |
72 |
> |
if (colval(mcolor,i) < 1e-15) |
73 |
> |
colval(mcolor,i) = 1e-15; |
74 |
> |
} else if (r->crtype & SHADOW) |
75 |
> |
return(1); |
76 |
|
/* get modifiers */ |
77 |
|
raytexture(r, m->omod); |
78 |
|
if (r->rod < 0.0) /* reorient if necessary */ |
89 |
|
/* angular transmission */ |
90 |
|
cos2 = sqrt( (1.0-1.0/(rindex*rindex)) + |
91 |
|
pdot*pdot/(rindex*rindex) ); |
92 |
< |
setcolor(mcolor, pow(colval(mcolor,RED), 1.0/cos2), |
93 |
< |
pow(colval(mcolor,GRN), 1.0/cos2), |
94 |
< |
pow(colval(mcolor,BLU), 1.0/cos2)); |
92 |
> |
if (hastrans) |
93 |
> |
setcolor(mcolor, pow(colval(mcolor,RED), 1.0/cos2), |
94 |
> |
pow(colval(mcolor,GRN), 1.0/cos2), |
95 |
> |
pow(colval(mcolor,BLU), 1.0/cos2)); |
96 |
|
|
97 |
|
/* compute reflection */ |
98 |
|
r1e = (pdot - rindex*cos2) / (pdot + rindex*cos2); |
99 |
|
r1e *= r1e; |
100 |
|
r1m = (1.0/pdot - rindex/cos2) / (1.0/pdot + rindex/cos2); |
101 |
|
r1m *= r1m; |
102 |
< |
/* compute transmittance */ |
103 |
< |
for (i = 0; i < 3; i++) { |
104 |
< |
d = colval(mcolor, i); |
105 |
< |
colval(trans,i) = .5*(1.0-r1e)*(1.0-r1e)*d/(1.0-r1e*r1e*d*d); |
106 |
< |
colval(trans,i) += .5*(1.0-r1m)*(1.0-r1m)*d/(1.0-r1m*r1m*d*d); |
107 |
< |
} |
108 |
< |
multcolor(trans, r->pcol); /* modify by pattern */ |
102 |
> |
/* compute transmission */ |
103 |
> |
if (hastrans) { |
104 |
> |
for (i = 0; i < 3; i++) { |
105 |
> |
d = colval(mcolor, i); |
106 |
> |
colval(trans,i) = .5*(1.0-r1e)*(1.0-r1e)*d / |
107 |
> |
(1.0-r1e*r1e*d*d); |
108 |
> |
colval(trans,i) += .5*(1.0-r1m)*(1.0-r1m)*d / |
109 |
> |
(1.0-r1m*r1m*d*d); |
110 |
> |
} |
111 |
> |
multcolor(trans, r->pcol); /* modify by pattern */ |
112 |
|
/* transmitted ray */ |
113 |
< |
if (rayorigin(&p, TRANS, r, trans) == 0) { |
114 |
< |
if (!(r->crtype & SHADOW) && hastexture) { |
115 |
< |
for (i = 0; i < 3; i++) /* perturb direction */ |
116 |
< |
p.rdir[i] = r->rdir[i] + |
113 |
> |
if (rayorigin(&p, TRANS, r, trans) == 0) { |
114 |
> |
if (!(r->crtype & SHADOW) && hastexture) { |
115 |
> |
for (i = 0; i < 3; i++) /* perturb direction */ |
116 |
> |
p.rdir[i] = r->rdir[i] + |
117 |
|
2.*(1.-rindex)*r->pert[i]; |
118 |
< |
if (normalize(p.rdir) == 0.0) { |
119 |
< |
objerror(m, WARNING, "bad perturbation"); |
118 |
> |
if (normalize(p.rdir) == 0.0) { |
119 |
> |
objerror(m, WARNING, "bad perturbation"); |
120 |
> |
VCOPY(p.rdir, r->rdir); |
121 |
> |
} |
122 |
> |
} else { |
123 |
|
VCOPY(p.rdir, r->rdir); |
124 |
+ |
transtest = 2; |
125 |
|
} |
126 |
< |
} else { |
127 |
< |
VCOPY(p.rdir, r->rdir); |
128 |
< |
transtest = 2; |
126 |
> |
rayvalue(&p); |
127 |
> |
multcolor(p.rcol, p.rcoef); |
128 |
> |
addcolor(r->rcol, p.rcol); |
129 |
> |
transtest *= bright(p.rcol); |
130 |
> |
transdist = r->rot + p.rt; |
131 |
|
} |
117 |
– |
rayvalue(&p); |
118 |
– |
multcolor(p.rcol, p.rcoef); |
119 |
– |
addcolor(r->rcol, p.rcol); |
120 |
– |
transtest *= bright(p.rcol); |
121 |
– |
transdist = r->rot + p.rt; |
132 |
|
} |
123 |
– |
|
133 |
|
if (r->crtype & SHADOW) { /* skip reflected ray */ |
134 |
|
r->rt = transdist; |
135 |
|
return(1); |
145 |
|
if (rayorigin(&p, REFLECTED, r, refl) == 0) { |
146 |
|
for (i = 0; i < 3; i++) |
147 |
|
p.rdir[i] = r->rdir[i] + 2.0*pdot*pnorm[i]; |
148 |
+ |
checknorm(p.rdir); |
149 |
|
rayvalue(&p); |
150 |
|
multcolor(p.rcol, p.rcoef); |
151 |
|
addcolor(r->rcol, p.rcol); |