**Unformatted text preview: **Interactive Computer Graphics:
Lecture 13
"
Radiosity
! Graphics Lecture 13: Slide 2! Graphics Lecture 13: Slide 3! The reﬂectance equation
The reﬂectance equation The reﬂectance equation"
NB. updated slides and notes!
NB. updated slides and notes!
Recall reﬂectance equation: models reﬂected light from a a
Recall the reﬂectance equation: models light from
Recall• thethe reﬂectance equation: models reﬂected reﬂected light
surface:
surface:from a surface: !
Iref lected k +ak (n · n ·Il) Iincidentk (rs ·(v)qv)q Iincident
Iref!lected = = k + kd ( l) incident + + k r · Iincident
a
s
d
Iincident : Incident light intensity
Iincident : Incident light intensity
k{a,d,s} control amounts of:
k{a,d,s} control amounts of:
I k : ambient light
I ka : a
ambient light
I k : di↵use reﬂection
I kd : d ↵use reﬂection
di
I ks , q : specular reﬂection
I ks , q : specular reﬂection Graphics Lecture 13: Slide 4! . 2./ 29 2 / 29 The reﬂectance equation
The reﬂectance equation The reﬂectance equation"
NB. updated slides and notes!
NB. updated slides and notes!
Recall reﬂectance equation: models reﬂected light from a a
Recall the reﬂectance equation: models light from
Recall• thethe reﬂectance equation: models reﬂected reﬂected light
surface:
surface:from a surface: !
Iref lected k +ak (n · n ·Il) Iincidentk (rs ·(v)qv)q Iincident
Iref lected = = k + kd ( l) incident + + k r · Iincident
a
s
d • Iincident: light intensity !
Iincident : Incident light intensity
Iincident : Incident light intensity
k{a,d,s} control amounts of:
k{a,d,s} control amounts of:
I k : ambient light
I ka : a
ambient light
I k : di↵use reﬂection
I kd : d ↵use reﬂection
di
I ks , q : specular reﬂection
I ks , q : specular reﬂection Graphics Lecture 13: Slide 5! . 2./ 29 2 / 29 The reﬂectance equation
The reﬂectance equation The reﬂectance equation"
NB. updated slides and notes!
NB. updated slides and notes!
Recall reﬂectance equation: models reﬂected light from a a
Recall the r...

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