[vtkusers] VectorText rotating center

[Cory Quammen]

Hi Dejan,

You'll have to compute the center of the text source (available by getting
the bounds of the m_TextSource) and shifting the actor so that the center
is at the world center, rotate, then shift back.

Hope that helps,
Cory

On Wed, Sep 16, 2015 at 6:11 AM, Dejan Zivkovic <dejan.zivkovic90 at gmail.com>
wrote:

> Hi,
>
> I would like to have VectorText that is rotation around its central
> vertical axis.
>
> I wrote some code like this:
>
> *vtkSmartPointer<vtkVectorText> m_TextSource =
> vtkSmartPointer<vtkVectorText>::New();*
> *m_TextSource->SetText("3DIA");*
> *m_TextSource->Update();*
>
> *vtkSmartPointer<vtkPolyDataMapper> m_Mapper =
> vtkSmartPointer<vtkPolyDataMapper>::New();*
> *m_Mapper->SetInputConnection(m_TextSource->GetOutputPort());*
>
> *vtkSmartPointer<vtkActor> **m_Actor = vtkSmartPointer<vtkActor>::New();*
> *m_Actor->GetProperty()->SetColor(1.0, 1.0, 1.0);*
> *m_Actor->SetMapper(m_Mapper);*
> *m_Actor->RotateY(2.0);*
>
> and this way the text rotates around the world center.
> How to move the center of rotation to the center of the text?
>
> Thanks,
> Dejan Zivkovic
>
>
>
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-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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