PSTricks
\psset{Decran=50,lightsrc=viewpoint}
\psset{solidmemory}
\psSolid[object=pie,
h=1, %% hauteur
r=1, %% rayon
phi=30, %% angle de debut
theta=300, %% angle de fin
ngrid=36 2, %% maillage horizontal et vertical
fillcolor=yellow,
name=pie1,
action=none,
]%
\psSolid[object=pie,
h=1, %% hauteur
r=1, %% rayon
phi=300, %% angle de debut
theta=390, %% angle de fin
fillcolor=red,
name=pie2,
action=none,
](.3,0,0)%
\psSolid[object=fusion,
base=pie1 pie2
]
\composeSolid
\end{pspicture} #