April 05
Prof. Ismael H. F. Santos -
ismael@tecgraf.puc-rio.br
2
Vantagens das coordenadas homogêneas
(pontos no infinito, exemplo)
A
B
C
D
x
y
O
1
-1
1
2
A’
B’
C’
D’
x
y
O’
infinito
-1
1
1
2
1
1
1
3
0
1
0
1
0
-2
0
0
3
0
1
0
1
0
-2
0
0
=
1
1
1
2
2
1
3
0
1
0
1
0
-2
0
0
=
4
2
2
1
-1
1
3
0
1
0
1
0
-2
0
0
=
1
-1
1
2
-2
1
3
0
1
0
1
0
-2
0
0
=
4
-2
2
2
1
1
=
=
2
-1
1
J
J
J
J