Computer Aided Engineering Design

238 COMPUTER AIDED ENGINEERING DESIGN

rB( , 1) = [uuuu 1]

2–2 1 1

–3 3 –2 –1

00 10

10 00

(1, 0, 0)

(1, 0.5, 1)

(0, 0, 1)

(0, 1, 0)

32

⎡

⎣

⎢

⎢

⎢

⎢

⎤

⎦

⎥

⎥

⎥

⎥

⎡

⎣

⎢

⎢

⎢

⎢

⎤

⎦

⎥

⎥

⎥

⎥

Figure 7.28 A Composite surface with four Coon’s patches

0

0.25

0.5

0.75

1 0.5

0.75

1

1.25

1.5

0

0.2

0.4 0 0.25

0.5 0.75

1

1

0.75

0.5

0.25

0

(a) Surface A (b) surface B

1

0.75

0.5

0.25

0

1

1.2

1.4

0.5

0.75

1

1.25

1.5

0

0.25

0.5

0.75

1

0

0.2

0.4^1 1.2 1.4

(c) Surface C (d) Surface D

0

0.5

1

1.5

1

0.75

0.5

0.25

0

0

0.5

1

1.5

(e) Complete surface