[Paraview] Rendering bug in ParaView-CVS

[Michael Wild]

True, but you could write a small utility which directly operates on  
your output data and scales it there... Better than this very  
irritating behavior nothing.

Michael

On 14. Aug, 2009, at 15:09, Dominik Szczerba wrote:

> That's what I thought. PV and more specifically VTK probably  
> hardcodes float representation. I once raised this issue with no  
> resonance.
> I think the single/double should be respected (visualization for  
> micro/nano). Of course one can scale, but this slows things down for  
> large transient datasets.
>
> - Dominik
>
> Michael Wild wrote:
>> It actually the data set you gave me for testing the Ogg/Theora  
>> stuff.  I just noticed that this only happens with your data set (I  
>> do not  have such small stuff normally ;-))
>> It really seems to be the size. If I scale with a factor of 35,   
>> everything is fine. All smaller integer scaling factors result in  
>> this  effect (more pronounced the smaller the factor).
>> Michael
>> On 14. Aug, 2009, at 14:36, Dominik Szczerba wrote:
>>> Can you post your dataset for a test?
>>>
>>> I have observed a similar problems with whole actors disappearing   
>>> (the same way, as if gradually cut by something) for very small   
>>> datasets. I suspect this may have to do with single precision   
>>> accuracy somewhere.
>>>
>>> - Dominik
>>>
>>>
>>> Michael Wild wrote:
>>>> Hi all
>>>> In current CVS there seems to be a rendering problem with the    
>>>> crosshairs displayed at the rotation centre. Whenever the x-y  
>>>> plane  is  becoming close to normal to the view-vector (i.e.  
>>>> parallel to  the  camera-plane), these markers simply disappear.  
>>>> Funny thing is,  they  seem to be gradually "cut off" from left  
>>>> to right (or right  to left,  depending on which way x-y is  
>>>> tilted).
>>>> To illustrate the problem, I created a small animation which   
>>>> sweeps  the camera from left to right: https://www.ifd.mavt.ethz.ch/people/wild/personal/files/sweep.mp4
>>>> - The first frame shows the partially cut-off crosshairs
>>>> - As the x-y plane becomes close to parallel with the view- 
>>>> plane,  it  completely disappears
>>>> - Towards the end, the crosshairs gradually appear again
>>>> I see this problem both on Mac OS X 10.5.7 and OpenSUSE 10.3.
>>>> Am I the only one with this issue?
>>>> Michael
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>
>
> -- 
> d o m i n i k   s z c z e r b a ,   p h d . . . . . . . . . . .
> c o m p u t a t i o n a l   l i f e   s c i e n c e   g r o u p
> . . . . . . . i t ' i s   r e s e a r c h   f o u n d a t i o n
> . . . . . . . . . . . . . . . . . . . . http://www.itis.ethz.ch
>