[vtkusers] Recent vtkAssembly Changes

[Bill Lorensen]

John,
         Check with Will. He's reworked vtkAssembly,

Bill

At 10:13 PM 6/25/00 +0100, John Biddiscombe wrote:
>I have a custom vtkAssembly subclass which slices terrain data
>into 1km tiles, creates a mapper and applies a texture to each
>piece, combining the lot into a nice assembly.
>
>After doing a CVS checkout, it no longer works, and I need to
>supply an "Update" method so that it will rebuild itself when the
>terrain (or images) are changed.
>
>Previously I overrided RenderOpaqueGeometry (which was a kludge in
>my view) and I'm tempted now to override UpdatePaths as this gives
>me a perfect opportunity to rebuild my assembly. Is there a
>correct place to intercept the update mechanism and if so, why no
>virtual methods?
>
>If I've understood the chain of events alright, then I'll make
>UpdatePaths virtual and use that. OK?
>
>John B