z:
0
0

c:
1 0 0
0 1 0
0 0 1

P0:z-c
0 0.125 0.625
0 0.875 0.625

P1:z-c
0.125 0.625 1
0.875 0.625 0

T0:c-c
0.75 0.25 0
0.25 0.75 0.75
0 0 0.25

T1:c-c
0.25 0 0
0.75 0.75 0.25
0 0.25 0.75