[Paraview] Rendering bug in ParaView-CVS

[Dominik Szczerba]

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
>>
> 


-- 
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