More precise clipping with implicit functions

[david.pont at forestresearch.co.nz]

John,
     Thanks for the pointer about window clipping, I did wonder about starting
with a larger window!, so I will try that. I am running Windows 98 on a Dell
Inspiron 7000 laptop with a "RAGE LT PRO AGP 2X" display adaptor. I might
twiddle with hardware acceleration settings to see if I can make it behave
better.

No problem for me about your web page. The BCBvtkRenderWindow I downloaded
worked fine, so I am very happy to have vtk so nicely integrated into the C
Builder environment.

Yes I think bounding the subdivision activity will be a very good first step. If
it is just intersection with the SURFACE of the ellipse you are interested in,
maybe you could clip away polydata from the interior too?. Keep me posted, as
eventually we might be able to suggest some useful improvements to the
Subdivision Surface classes.

     regards
          Dave Pont


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