01/23/2003
15-462 Graphics I
17
Map to Representations
•w = a1 v1 + a2 v2 + a3 v3 , aT = [a1 a2 a3]
•w = b1 u1 + b2 u2 + b3 u3 , bT = [b1 b2 b3]
•So
a = MT b
and b = (MT)-1 a
•Suffices
for rotation and scaling, not translation
