[vtkusers] Offscreen GPU Volume Rendering Mac OS X generates black images

[Chris Hafey]

No errors on the console.  I will work on a standalone example.  Can you
please clarify whether or not I should be using mesa / osmesa for GPU
rendering on Mac OS X?

Chris

On Thu, Sep 25, 2014 at 7:37 AM, Aashish Chaudhary <
aashish.chaudhary at kitware.com> wrote:

> This is good to know. Do you get any errors on the console? A standalone
> example  will be nice.
>
> - Aashish
>
> On Thu, Sep 25, 2014 at 8:32 AM, Chris Hafey <chafey at gmail.com> wrote:
>
>> I am enabling off screen rendering by calling SetOffScreenRendering(1) on
>> the vtkRenderWindow.  Should I be using osmesa?  I can create a standalone
>> example to reproduce if needed.
>>
>> Chris
>>
>> On Thu, Sep 25, 2014 at 7:21 AM, Aashish Chaudhary <
>> aashish.chaudhary at kitware.com> wrote:
>>
>>> No problem. How did you enable the offscreen?  Can you post your code
>>> somewhere?
>>>
>>> Thanks,
>>> Aashish
>>>
>>> On Thu, Sep 25, 2014 at 8:05 AM, Chris Hafey <chafey at gmail.com> wrote:
>>>
>>>> Hi Aashish,
>>>>   Forgive my ignorance but I don't know much about osmesa or whether I
>>>> am using it.  I am using VTK as built by homebrew and don't see any options
>>>> related to osmesa.  I have not installed osmesa on the machine.  No errors
>>>> or warnings are issued on the console.
>>>>
>>>> Chris
>>>>
>>>> On Thu, Sep 25, 2014 at 6:46 AM, Aashish Chaudhary <
>>>> aashish.chaudhary at kitware.com> wrote:
>>>>
>>>>> Hi Chris,
>>>>>
>>>>> Are you using osmesa for the offscreen rendering? Are you getting any
>>>>> error on the console?
>>>>>
>>>>> Thanks
>>>>>
>>>>>
>>>>> On Thu, Sep 25, 2014 at 7:32 AM, Chris Hafey <chafey at gmail.com> wrote:
>>>>>
>>>>>> VTK 6.1.0
>>>>>> Mac OS X Mavericks 10.9.5
>>>>>> Macbook Pro 2012 Retina with nVidia GeForce GT 650M 1024 MB
>>>>>>
>>>>>> My program uses VTK to do off screen volume rendering of medical
>>>>>> images.  I suspect this is a bug in VTK and not my software because:
>>>>>> 1) GPURenderMode works fine on Windows (both in a VM running on same
>>>>>> Mac and on two other Windows 7 boxes with an nVidia GPUs)
>>>>>> 2) RayCastRenderMode works fine on Mac OS X
>>>>>> 3) TextureRenderMode works fine on Mac OS X
>>>>>>
>>>>>> I tried searching the mailing list and google and couldn't find
>>>>>> anything.  The rendering code is about as basic as it can be - it simply
>>>>>> sets the color, opacity, clip planes and matrix.  Any ideas on what I might
>>>>>> be doing wrong or how I can debug?
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>> Chris Hafey
>>>>>>
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>>>>>
>>>>>
>>>>> --
>>>>>
>>>>>
>>>>>
>>>>> *| Aashish Chaudhary | Technical Leader         | Kitware Inc.
>>>>>     *
>>>>> *| http://www.kitware.com/company/team/chaudhary.html
>>>>> <http://www.kitware.com/company/team/chaudhary.html>*
>>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>>
>>>
>>>
>>> *| Aashish Chaudhary | Technical Leader         | Kitware Inc.
>>>   *
>>> *| http://www.kitware.com/company/team/chaudhary.html
>>> <http://www.kitware.com/company/team/chaudhary.html>*
>>>
>>
>>
>
>
> --
>
>
>
> *| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *
> *| http://www.kitware.com/company/team/chaudhary.html
> <http://www.kitware.com/company/team/chaudhary.html>*
>
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