bissectrice_01.tex

\documentclass{article}
\usepackage{pst-solides3d}
\begin{document}
\pagestyle{empty}
 
\begin{pspicture}(-6,-5)(6,8)%
\psframe*[linecolor=blue!50](-6,-5)(6,7)
\psset{lightsrc=viewpoint,viewpoint=50 30 15,Decran=60}
\psset{solidmemory}
%% definition du plan de projection
\psSolid[object=plan,
   definition=equation,
   args={[1 0 0 0] 90},
   base=-4 4 -3 3,
   fillcolor=white,
   linecolor=yellow,
   plangrid,
   planmarks,
   showBase,
   name=monplan,
]
\psset{plan=monplan}
%% definition du point A
\psProjection[object=point,
   args=-3 1,
   name=A,
   text=A,
   pos=uc,
]
%% definition du point B
\psProjection[object=point,
   args=-1 -2,
   name=B,
   text=B,
   pos=cl,
]
%% definition du point C
\psProjection[object=point,
   args=2 0,
   name=C,
   text=C,
   pos=dc,
]
%% droite (AB) 
\psProjection[object=droite,
   args=A B,
]
\psProjection[object=droite,
   args=B C,
]
%% bissectrice de ABC
\psProjection[object=droite,
   definition=bissectrice,
   args=A B C,
]
\composeSolid
\axesIIID(4,4,2)(5,5,6)
\end{pspicture}
 
\end{document}