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I want to hide the parallelepiped with the grid of the cylindre.<br><br>\begin{center}<br>\psset{unit=1}<br>\psset{lightsrc=20 20 19,viewpoint=15 15 9,Decran=10}<br>\begin{pspicture}(-2,-2)(4,3)<br>\psSolid[%<br>action=draw*,%<br>object=cylindre,%<br>fillcolor=Maroon!10,%<br>incolor=Maroon!10,%<br>h=6,%<br>r=6%<br>](0,0,0)<br>%%%<br>\psSolid[%<br>action=draw**,%<br>object=parallelepiped,%<br>fillcolor=Gray!30,%<br>a=3,%<br>b=6,%<br>c=.4<br>](0,0,0)<br>%%<br>\psPoint(0,8,0){P1}<br>\psPoint(0,8,6){P2}<br>\pcline(P1)(P2)<br>\ncput*{$h$}<br>\psPoint(0,3,.2){P11}<br>\psPoint(0,6,6){P21}<br>\pcline[linestyle=dashed](P1)(P11)<br>\pcline[linestyle=dashed](P2)(P21)<br>%\axesIIID(0,0,0)(8,8,8)<br>\end{pspicture}<br>\end{center}<br><BR>Thanks, Ernesto.<BR> <BR><br><br><br> <BR> </div></body>
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