[Paraview] Opacity < 1 significantly slows things down

[Utkarsh Ayachit]

Yup, but it's not merely a bit wrong since the order matters at the
primitive level and not merely the the object level. Just simply creating a
sphere source with opacity < 1 and interacting with it will highlight the
issue.

Utkarsh

On Mon, May 11, 2009 at 5:32 PM, David Doria <daviddoria at gmail.com> wrote:

> Yea, that's much better. So what is the problem with leaving this off?
> Sometimes things will look a bit wrong ie. something is in front of
> something it shouldn't be?
>
> Thanks,
>
> David
>
>
>
> On Mon, May 11, 2009 at 4:52 PM, Utkarsh Ayachit <
> utkarsh.ayachit at kitware.com> wrote:
>
>> When objects with opacity < 1 are involved, ParaView uses depth-peeling to
>> ensure that the primitives are rendered in correct order. Depth peeling is a
>> multipass rendering technique which uses frame buffers etc. and hence is
>> slower than rendering without depth peeling at all. To verify that it's
>> depth peeling that's slowing things down, go to "Edit|settings" and in the
>> "Render View" options, uncheck Enable Depth Peeling.
>>
>> Utkarsh
>>
>> On Mon, May 11, 2009 at 4:43 PM, David Doria <daviddoria at gmail.com>wrote:
>>
>>> If I set the opacity of a file with around 50,000 cells to any value < 1,
>>> it goes from working very smoothly to being super super choppy. Is this the
>>> expected behavior? I tried immediate mode rendering on and off with no
>>> apparent difference.
>>>
>>> Thanks,
>>>
>>> David
>>>
>>> _______________________________________________
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Please keep messages on-topic and check the ParaView Wiki at:
>>> http://paraview.org/Wiki/ParaView
>>>
>>> Follow this link to subscribe/unsubscribe:
>>> http://www.paraview.org/mailman/listinfo/paraview
>>>
>>>
>>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://www.paraview.org/mailman/listinfo/paraview
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.paraview.org/pipermail/paraview/attachments/20090511/d5fa604d/attachment.htm>