PowerPoint Presentation · 2020-04-25 · 37 n s [0, 100] k a + k d + k s < 1 k a (~0.1) n s k d k...
Transcript of PowerPoint Presentation · 2020-04-25 · 37 n s [0, 100] k a + k d + k s < 1 k a (~0.1) n s k d k...
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P
P
P
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P
N P
L IL
P
V P
P
I p
N = L = V =1
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I
ke
I = ke
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ka
ILa
I = ke+ k
aI
La
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ke ka ILa
I()
ka ILa
I(l) = ka(l)I
La(l)
I R = ka
R ILa
R
I G = ka
G ILa
G
I B = ka
B ILa
B
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kd
IL
N
L
B
I = ke+ k
aI
La+ k
dI
LB _____
= ke+ k
aI
La+ k
dI
LB( )
B =1 if N × L > 0
0 if N × L £ 0
ìíï
îï
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V
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N
I =I
Lif V = R
0 otherwise
ìíï
îï
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R V
ns
(x)+ max(0, x).
ns
Ispecular
~ B(R × V)+
ns
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L V
N H
(x)+ max(0, x).
Ispecular
~ B(N ×H)+
ns
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ks
ns
H L V
V
I = ke+ k
aI
La+ k
dI
LB(N ×L) + k
sI
LB(N ×H)
+
ns
= ke+ k
aI
La+ I
LB k
d(N ×L)+ k
s(N ×H)
+
nsé
ëêùûú
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a b c
2atten
1f
ar br c=
+ +
fatten
=1
r2
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L
S
a L S
b
e
( )2
spot
0 otherwise
e
f ar br ca b
+ +
L S
=
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ka kd
( )( ) ( ), ,2
s
j
j jnj
e a La j L j j d j s j
j j j j j j
e
I k k I I B k ka r b r c
b
+
= + + + + +
L S
N L N H
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L V
kd ks ns
I = ILB k
d(N ×L)+ k
s(N ×H)
+
nsé
ëêùûú
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vi ← v
out cblinn-phong
out vi
c
blinn-phong¬ shade with L,V,N,k
d,k
s,n
s
color ¬ cblinn-phong
p
→vi1,vi
2,vi3
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determine eye, normal, vertex in world coordinates
vi← v
out eyewout nwout vwout vi
→vi
1,vi
2 ,vi
3
( )pw
N n
pwvL
( )w
pev v −V
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ns [0, 100]
ka + kd + ks < 1
ka (~0.1)
ns kd ks
Metal largeSmall, color of metal
Large, color of metal
Plastic mediumMedium, color of plastic
Medium, white
Planet 0 varying 0
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N • L
fr ww
win
fr (win
,wout
) or fr (win®w
out)
fr (win
,wout
)
win
I = ILB k
d(N ×L)+ k
s(N ×L) N ×
L + V
L + V
æ
è
çç
ö
ø
÷÷
+
nsé
ë
êê
ù
û
úú
= ILB(N ×L) k
d+ k
sN ×
L + V
L + V
æ
è
çç
ö
ø
÷÷
+
nsé
ë
êê
ù
û
úú
= ILB(N ×L) f
r(L,V)
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Wool cloth and silk cloth [Irawan and Marschner, 2012]
Hair illuminated from different angles [Marschner et al., 2003]
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