[vtkusers] Line distance implicit function

[Chris Scharver]

At 11:35 AM +1200 on 04/08/2003, David.Pont at ForestResearch.co.nz wrote:

>    I think you could use vtkImplicitModeller followed by vtkImplicitDataSet
>but this is very inefficient. It seems vtkImplicitModeller is like
>vtkImplicitFunction and vtkSampleFunction rolled up together. It would be
>nice to unroll this: make a class derived from vtkImplicitFunction which
>contains the EvaluatePosition stuff to get the distance functionality. You
>might have to use local differences to get the gradient? Then you could
>pass this new implicit function directly to the clipper. This sounds much
>smarter, and a useful class.

Thanks for the response! Looking at the code in a little more detail, 
it looks like I should be able to just grab the part that I need. 
vtkCell already handles the significant work involved. I'll likel 
have time to implement just what I need for a 
vtkImplicitPolyDataFunction, but once I get that done I'll make it 
available so that it can be polished off and perhaps contributed.

Chris
--
Chris Scharver
Electronic Visualization Laboratory
The University of Illinois at Chicago
Ph: 312-996-3002   FAX: 312-413-7585
<http://www.evl.uic.edu/scharver/>