Hi Matt,

On Mon, Nov 22, 2010 at 4:00 PM, Matt Klingensmith <matthewk1989@aol.com> wrote:
> Unfortunately the code you gave me produces the same results in cturtle (a
> diagonal line in the xz plane at a 45 degree angle). I thought that it might
> have been an issue with tf, so I used static_transform_publisher to publish
> the points to the origin at zero rotation, and still had the same results.

I'm not sure what the issue is. I'm getting the expected results under
cturtle as well.
The following images show the iso-surface at different distances, for
a line of points on the y axis. As expected, they are cylinders of
growing diameter.

http://www-clmc.usc.edu/~kalakris/ros/df1.png
http://www-clmc.usc.edu/~kalakris/ros/df2.png
http://www-clmc.usc.edu/~kalakris/ros/df3.png

If you can send me a minimal node that I can compile that reproduces
your problem, I'd be happy to look at it.

- Mrinal