1 \section{Lines of
\Index{intersecting planes
}}
3 For every object of the type
\Lcs{psSolid
}, it is possible to draw the lines
4 of intersection between a chosen solid and one or more planes.
6 The numeric argument
\texttt{\Lkeyword{intersectiontype
}=$k$
} (value $-
1$ by default)
7 determines whether or not to draw the intersection lines. Set to $
0$, the
8 intersection lines are drawn.
10 There are three keys to be handled:
14 \item \texttt{\Lkeyword{intersectionplan
}=\
{[$eq_1$
] ...
[$eq_n$
]\
}}
15 defines a list of the equations $eq_i$ of the intersecting planes. The $eq_i$
16 could as well be some objects from the type
\Lkeyword{plan
} (see the related section).
18 ax+by+cz+d=
0 \qquad \text{that would deliver $
[a\, b\, c\, d\,
]$ as one of the $n$ equations
}
21 \item \texttt{\Lkeyword{intersectionlinewidth
}=$w_1$ ... $w_n$
}
22 defines a list of the thickness in picas $w_i$ for each of the intersection lines.
24 \item \texttt{\Lkeyword{intersectioncolor
}=
color$_1$ ...
color$_n$
}
25 defines a list for the colors of the intersection lines.
29 \begin{LTXexample
}[width=
6cm
]
30 \psset{lightsrc=
20 -
20 10,viewpoint=
50 -
20 10 rtp2xyz,Decran=
50}
32 \begin{pspicture*
}(-
5,-
4)(
5,
5)
35 intersectionplan=
{[1 0 .5 2] [1 0 .5 -
1]},
36 intersectionlinewidth=
1 2,
37 intersectioncolor=(bleu) (rouge),
38 RotX=
20,RotY=
90,RotZ=
30,