Source de Fig165bis.tex

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\multido{\rTheta=70+-20}{8}{%
    \parametricplot[plotpoints=3600]{-.16}{0.16}{%
        /R 4 def
        /T 1 def
        /a 6.28 R mul def
        /X a t mul T div def
        /Angle \rTheta\space 360 t mul T div add def
        Angle 89 gt {/Angle 89 def} if
        Angle -89 lt {/Angle -89 def} if
        /Y X Angle dup sin exch cos div mul def
        X Y}
        \psline[linestyle=dashed](4;\rTheta)(-4;\rTheta)
        }
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\psline(0,-4)(0,4)
\end{pspicture}
\end{center}

— Syracuse — Dernière modification : 13 juillet 2002 (0.08s - 3210503 - 6 juillet 2008)