03/26/2002
15-462 Graphics I
25
Barycentric Coordinates in 2D
•Given
3 points instead of 2
•Define
3 barycentric coordinates, a, b, g
•p
= a p1 + b p2 + g p3
•p
inside triangle iff 0 · a, b,
g ·
1
•How do
we calculate a, b, g
given p?
p1
p2
p3
p