[vtkusers] Annotating an image with text

[Jérôme]

You are right. Writing a rendering process for annotating an image makes no
sense. The vtkTextActor is not the solution. However, the vtkTextSource
produces a vtkPolyData. I think that you can use this polydata through a
vtkPolyDataToImageStencil in order to mask the image according to the text.

HTH

Jerome

2009/12/9 David Doria <daviddoria+vtk at gmail.com <daviddoria%2Bvtk at gmail.com>
>

> On Wed, Dec 9, 2009 at 2:29 PM, Jérôme <jerome.velut at gmail.com> wrote:
> > You can use SetPosition in vtkTextActor to place a string everywhere in
> the
> > image. For file writing, why not using vtkWindowToImageFilter?
> >
> > BTW, I sent a mail mentioning a segfault caused by vtkTextActor
> > ("vtkTextActor segfaults my render window"). Did you try to use it? Am I
> the
> > only one?
> >
> > Jerome
>
> Jerome,
>
> If there is not already a window then it is quite a process to add
> renders, etc, etc. It seems like there should just be a way to insert
> a string directly into image pixels as vtkImageCanvasSource2D does for
> geometric objects.
>
> To answer your question - this works fine for me:
> http://www.cmake.org/Wiki/Display_text
>
> Thanks,
>
> David
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