Re: add arrow to ContourPlot3D

*To*: mathgroup at smc.vnet.net*Subject*: [mg121161] Re: add arrow to ContourPlot3D*From*: Patrick Scheibe <pscheibe at trm.uni-leipzig.de>*Date*: Thu, 1 Sep 2011 06:03:50 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <j3ieg4$sd3$1@smc.vnet.net> <201108311005.GAA12139@smc.vnet.net>

It just doesn't do what you want it to do because "Epilog is an option for graphics functions which gives a list of graphics primitives to be rendered *after* the main part of the graphics is rendered." In the case of 3d-graphics this means *after* the projection of the 3d-model was projected onto the 2d drawing window: "In three-dimensional graphics, two-dimensional graphics primitives can be specified by the Epilog option. The graphics primitives are rendered in a 0,1 coordinate system. " Cheers Patrick On Wed, 2011-08-31 at 06:05 -0400, Alan wrote: > Well, I can use Show to do this. So my question change to: why was it > wrong to use Epilog? > > Thanks, > Alan Isaac >