\documentclass{article} \usepackage{pst-solides3d} \begin{document} \pagestyle{empty} \begin{pspicture}(-6,-5)(6,8)% \psframe*[linecolor=blue!50](-6,-5)(6,7) \psset{lightsrc=viewpoint,viewpoint=50 30 15,Decran=60} \psset{solidmemory} %% definition du plan de projection \psSolid[object=plan, definition=equation, args={[1 0 0 0] 90}, base=-4.2 4.2 -3.2 3.2, name=monplan, fillcolor=white, linecolor=gray!40, plangrid, planmarks, showBase, ] \psset{plan=monplan} %% definition du point A \psProjection[object=point, args=-2 1, name=A, text=A, pos=uc, ] %% definition du point B \psProjection[object=point, args=1 0, name=B, text=B, pos=uc, ] ] %% definition du cercle C1 \psProjection[object=cercle, args=A 2, range=0 360, name=C1, ] %% definition du cercle C2 \psProjection[object=cercle, args=B 2, range=0 360, name=C2, ] %% intersection des cercles C1 et C2 \psProjection[object=point, definition=intercercle, args=C1 C2, name=E, text=E, pos=dl, ] \psProjection[object=point, args=E0, text=F, pos=ur, ] \composeSolid %\axesIIID(4,4,2)(5,5,6) \end{pspicture} \end{document}