[vtkusers] Re: Delete Cells from vtkPolyData

[Goodwin Lawlor]

Mike Jackson wrote:
> So, just how do I actually delete a cell from a vtkPolyData? 
<snip>
> I did read some archive threads where it was suggested to just build a 
> new vtkPolyData object instead of trying to change the first vtkPolyData 
> Object. Is there truth to that?

That's correct - the cells/points list aren't random access so when you 
pluck a cell out of the middle of the list you have to reorder the list 
after that point.

You can have a look at this class to get an idea:

http://vtkbioeng.cvs.sourceforge.net/*checkout*/vtkbioeng/vtkbioeng/vtkCellsFilter.cxx

Basically, vtkPolyData::CopyCells(vtkPolyData, vtkCellList) does a lot 
of the work for you.

hth,

Goodwin