Visibility of individual elements, again!

[Paul Hsieh]

Ben: I recall that Will Schroeder mentioned some time ago that he has
unreleased code that can blink out cells in structured grids. You might
check with the vtk authors whether such code would be released.

In the absence of this blinking capability, you might consider two
approaches:
1. Use vtkThreshold to extract those cells you want to keep.
2. Represent your data set as unstructured grid and you can remove
   cells (in your code).
In both cases, you end up working with an unstructured grid. The cells
that you want to make invisible are actually removed.
Good Luck. Paul

Ben Held wrote:
> 
> Hello,
> 
> I am displaying large structued meshes (vtkStructuredGrid) using VTK.  Each
> element may have a different material, and the end-user will want to make
> elements of a certain material invisible.  Must I have a separate vtkActor
> for EACH element so I can make the proper actors invisible?  Or is there
> another, easier way?  If I have to have separate actors, is this going to
> be a major performance issue?


-----------------------------------------------------------------------------
This is the private VTK discussion list.  Please keep messages on-topic.
Check the FAQ at: <http://www.automatrix.com/cgi-bin/vtkfaq>
To UNSUBSCRIBE, send message body containing "unsubscribe vtkusers" to
<majordomo at gsao.med.ge.com>.  For help, send message body containing
"info vtkusers" to the same address.     Live long and prosper.
-----------------------------------------------------------------------------