[vtk-developers] Where did my text go?

[Yves Starreveld]

Hi,

Indeed, that problem has been present on the mac for a few months. Any 
vtkActor2D manifests it.

2D actors were getting rendered in the wrong place on the Z buffer, I 
think.

I was able to work around it with:

> Index: Rendering/vtkOpenGLFreeTypeTextMapper.cxx
> ===================================================================
> RCS file: /cvsroot/VTK/VTK/Rendering/vtkOpenGLFreeTypeTextMapper.cxx,v
> retrieving revision 1.27
> diff -r1.27 vtkOpenGLFreeTypeTextMapper.cxx
> 281a282,283
> >   glDepthFunc(GL_ALWAYS);
> >
> 435a438
> >   glDepthFunc(GL_LEQUAL);

It occurs on all macs, regardless of which graphics card they have.

It causes the failing of ScalarBar-image test (part of the text is 
clipped by the sphere)

Yves
On Saturday, January 18, 2003, at 02:47 PM, Sebastien BARRE wrote:

> At 1/18/2003 02:38 PM, Bill Lorensen wrote:
>> Sebastien,
>>
>> I just committed a file in Hybrid/Testing/Tcl/OverlayTextOnImage.tcl
>>
>> Once we get it to work, we can make it a regression test. It should 
>> display yellow text over the white ellipse.
>
> And indeed, this is what I see on my laptop. So as far as I'm 
> concerned, the test is working.
> This is sort-of a good news, since it probably means that your problem 
> is most likely the same problem as the one we see on the Mac, and Andy 
> is working on it I think.
>
> I've slightly modified your test though, a minor change for 
> color-blind people like me, yellow on white was really difficult to 
> see, so I almost "failed" the test myself :)
>
>
> --
> Sebastien Barre
>
>
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