par-solidescreux.tex

\section {\' Evider un solide}
 
Certains des solides prédéfinis ont un solide  ``{\sl creux}'' qui lui
est naturellement associé (le cône, le tronc de cône, le cylindre,
le prisme et la calotte sphérique). Pour ceux là, une option
\Cadre{[hollow=$boolean$]} est prévue. Positionné à
\textsl{false}, on a le solide habituel; positionné à \textsl{true} on
a la version creuse.
\newpage
\subsubsection {Exemple 1 : cylindre et cylindre creux}
\begin{LTXexample}[width=5cm]
\psset{unit=0.5}
\psset{lightsrc=viewpoint,viewpoint=50 60 25 rtp2xyz,Decran=50}
\begin{pspicture}(-2,-3)(6,6)
\psSolid[object=cylindre,h=6,r=2,
   fillcolor=yellow,
      ](0,4,0)
\end{pspicture}
\end{LTXexample}
 
\begin{LTXexample}[width=5cm]
\psset{unit=0.5}
\psset{lightsrc=viewpoint,viewpoint=50 60 25 rtp2xyz,Decran=50}
\begin{pspicture}(-2,-3)(6,6)
\psSolid[object=cylindre,h=6,r=2,
   fillcolor=yellow,incolor=red,
   hollow](0,4,0)
\end{pspicture}
\end{LTXexample}
 
 
\newpage
\subsubsection {Exemple 2 : prisme et prisme creux}
 
\begin{LTXexample}[width=8.7cm]
\psset{unit=0.5}
\psset{lightsrc=viewpoint,viewpoint=50 60 25 rtp2xyz,Decran=50}
\begin{pspicture}(-9,-4)(4,8)
\defFunction{F}(t){t cos 3 mul}{t sin 3 mul}{}
\defFunction{G}(t){t cos}{t sin}{}
\psSolid[object=grille,base=-6 6 -4 4,action=draw]%
\psSolid[object=prisme,
    h=8,fillcolor=yellow,
    RotX=90,ngrid=8 18,
    base=0 180 {F} CourbeR2+
         180 0 {G} CourbeR2+](0,4,0)
\axesIIID(3,4,3)(8,6,7)
\end{pspicture}
\end{LTXexample}
 
\begin{LTXexample}[width=8.7cm]
\psset{unit=0.5}
\psset{lightsrc=viewpoint,viewpoint=50 60 25 rtp2xyz,Decran=50}
\begin{pspicture}(-9,-4)(3,8)
\defFunction{F}(t){t cos 3 mul}{t sin 3 mul}{}
\defFunction{G}(t){t cos}{t sin}{}
\psSolid[object=grille,base=-6 6 -4 4,action=draw]%
\psSolid[object=prisme,
    h=8,fillcolor=yellow,incolor=red,
    RotX=90,hollow,ngrid=8 18,
    base=0 180 {F} CourbeR2+
         180 0 {G} CourbeR2+](0,4,0)
\axesIIID(3,4,3)(8,6,7)
\end{pspicture}
\end{LTXexample}
 
\newpage
 
\subsubsection {Exemple 3 : calotte sphérique et calotte sphérique creuse}
 
\begin{LTXexample}[width=7.5cm]
\psset{unit=0.5}
\psset{lightsrc=10 20 30,viewpoint=50 60 25 rtp2xyz,Decran=50}
\begin{pspicture}(-7,-4)(5,7)
\psSolid[object=grille,
    base=-5 5 -5 5,
    action=draw]%
\psSolid[object=calottesphere,
    r=3,ngrid=16 18,
    fillcolor=cyan!50,
    incolor=yellow,
    theta=45,phi=-30](0,0,1.5)%
\axesIIID(3,3,3.6)(6,6,5)
\end{pspicture}
\end{LTXexample}
 
\begin{LTXexample}[width=7.5cm]
\psset{unit=0.5}
\psset{lightsrc=10 20 30,viewpoint=50 60 25 rtp2xyz,Decran=50}
\begin{pspicture}(-7,-5)(7,5)
\psSolid[object=calottesphere,
    r=3,ngrid=16 18,
    fillcolor=cyan!50,
    incolor=yellow,
    theta=45,phi=-30,
    hollow,
    RotY=-80]%
\axesIIID(0,3,3)(6,5,4)
\end{pspicture}
\end{LTXexample}
 
 
\endinput