[vtkusers] Error in vtkTextActor when creating a vtkScalarBarActor with no title

[David Lonie]

Hi David,

None of those things should be happening -- I'll take a look.

Dave

On Tue, Mar 10, 2015 at 7:34 PM, David Gobbi <david.gobbi at gmail.com> wrote:

> This may sound like a silly, but vtkScalarBarActor is giving me trouble.
> I'm using the master branch.
>
> If I don't call SetTitle, the vtkScalarBarActor gives me this error:
>
>     vtkTextActor::SetInput was passed an uninitialized string
>
> If I call SetTitle("") with an empty string, I get this error:
>
>     vtkOpenGLTexture: No scalar values found for texture input!
>
> Finally, if I call SetTitle(" "), i.e. give it a space character, then
> sometimes
> when I render the program gets stuck for a few seconds in the following
> function:
>
> vtkFreeTypeTools::CalculateBoundingBox<vtkUnicodeString>().
>
> Is there something that makes computing the bounding box of a single
> space character difficult for freetype?  And why does vtkScalarBarActor
> require the user to set a title?
>
>  - David
>
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