closest point via locators

[Kenneth Wang]

Hi,

This is a simple question about cell locators.  I see that vtkOBBTree
is derived from vtkCellLocator, and I was just wondering if vtkOBBTree
is meant to be used with methods and implementations which are
inherited from vtkCellLocator.  In particular, I've been using
vtkCellLocator's FindClosestPoint methods, and I'm now trying this out
with vtkOBBTree, but the FindClosestPoint methods (again,
implementations inherited from vtkCellLocator) use the
vtkCellLocator::Tree member, which is not set by vtkOBBTree during
instantiation / initialization.  In addition, the Tree types don't
seem interchangeable, and of course accesses to vtkCellLocator::Tree
are distinct from vtkOBBTree::Tree anyway.

So, my question is: Are vtkOBBTree's not meant to be used for closest
point calculation?  If that is the case, how do I know in general if
certain inherited methods are invalid for particular derived classes
in vtk?

Thanks,
Ken



------------------------------------------------------------------------
Kenneth C. Wang			E-mail: kenwang at stanfordalumni.org
Electrical Engineering Dept.	Voice:  (650) 725-0458
Stanford University		Fax:    (650) 725-7731
CIS 214, Stanford, CA 94305	Web:    http://www.stanford.edu/~kenwang
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