3 \subsection{Direct definition
}
5 The object
\Lkeyword{rightangle
} allows us to specify and draw a
6 \Index{right angle
}. The syntax is:
\texttt{[object=rightangle,args=$A$
9 \begin{LTXexample
}[width=
7.5cm
]
10 \begin{pspicture
}(-
3,-
2.5)(
3.5,
2.5)
%
11 \psframe*
[linecolor=blue!
50](-
3,-
2.5)(
3.5,
2.5)
12 \psset{lightsrc=viewpoint,viewpoint=
50 30 15,Decran=
40}
14 %% definition du plan de projection
24 \psset{plan=monplan,visibility=false
}
25 %% definition droite d
26 \psProjection[object=droite,
27 definition=horizontale,
30 %% definition du point M
31 \psProjection[object=point,
35 %% definition du point H
36 \psProjection[object=point,
41 %% definition du point H' pour orienter l'angle droit
42 %% et mettre la legende
43 \psProjection[object=point,
48 %% definition d'une ligne
49 \psProjection[object=line,
52 \psProjection[object=rightangle,
55 %\axesIIID(4,4,2)(5,5,6)