how to draw the contour lines on a surface

*To*: mathgroup at smc.vnet.net*Subject*: [mg3902] how to draw the contour lines on a surface*From*: goffinet <goffinet at cit-novell.univ-st-etienne.fr>*Date*: Sun, 5 May 1996 23:11:30 -0400*Sender*: owner-wri-mathgroup at wolfram.com

Hello I'm sure the answer lies somewhere inthe Mathematica journal, but I=20 have been unable to find it I want to get an image of a surface (with z=3Dz(x,y) would be a good= =20 start, with an implicit surface it would be even better) with the lines=20 z=3DConstant drawn on it. I don't want to Solve diff=E9rential equations = or=20 such, merely to make use of what is already done in ContourPlot (or=20 ImplicitPlot) and to draw the lines on the surface How can one get the Lines[... , ... , ] which are used by the=20 final display of a ContourPlot?=20 Thank you to anyone of help! =20 goffinet ==== [MESSAGE SEPARATOR] ====