-4 2 setxrange
-2 3 setyrange
25 setxunit
3 10 6 SetCamPos
0 0 0 SetCamView
qplanxy
2 setlinejoin 
10 setresolution

newpath
   pi 0 smoveto
   pi 0 {Sin 2 mul} Courbe_
currentcpathpointstable -2 rollparray 0 2 [2] newprismedroit
drawsolid