[vtkusers] vtkPolyDataMapper::New() returns null for the VTK nightly build

[David Doria]

On Wed, Nov 21, 2012 at 11:07 AM, Bill Lorensen <bill.lorensen at gmail.com>wrote:

> See if this link explains what to do:
> http://vtk.org/Wiki/VTK/Build_System_Migration#Implementation_Modules


Couldn't the factory be made to produce a message saying something similar
to this instead of just silently returning NULL? An error like "Warning:
the factory has returned NULL because you probably need to add a module to
the list of modules in find_package(VTK ...)" would give the user a clue
instead of requiring them to understand that this factory mechanism is
going on behind the scenes.

David
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