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MathGroup Archive 2007

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v.6 RevolutionPlot3D

  • To: mathgroup at smc.vnet.net
  • Subject: [mg75852] v.6 RevolutionPlot3D
  • From: Helen Read <read at math.uvm.edu>
  • Date: Sat, 12 May 2007 03:00:04 -0400 (EDT)

We just got 6.0 on our site license, and I installed on my computer(s) 
yesterday.

I see that SurfaceOfRevolution (which was in an add on package) has been 
replaced by RevolutionPlot3D. Sounds great, except that RevolutionPlot3D 
only revolves around the vertical axis. We (my calculus students) used 
the old SurfaceOfRevolution all the time for visualizing surfaces of 
revolution for computing volume and surface area, and we need to be able 
to revolve around both the vertical axis and the horizontal axis. This 
was a simple matter of setting RevolutionAxis->{0,0,1} or 
RevolutionAxis->{1,0,0} respectively. Now, I can write a function for 
revolving around the horizontal axis and provide it to the students, but 
I can already foresee the confusion it will cause when they can use a 
built-in function for revolving in one direction, and have to do it a 
different way to revolve in the other direction.

--
Helen Read
University of Vermont


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