[vtkusers] Display Differences in Hardware and Software Volume Rendering (pictures)

[Lisa Avila]

Hi Alex,

Something has gone wrong - either in your code or in the VolumePro mapper 
(which we don't test anymore). The images should looks very similar. You 
can test this - if you go to the Kitware web site and download VolView 1.3 
(make sure you don't get 2.0 - this doesn't support VolumePro). You should 
be able to load your data and switch between software and hardware 
rendering to compare the images.

Lisa


At 11:58 AM 6/18/2004, Alex Lear wrote:
>I have recently added a VP1000 to my development workstation.  I am
>surprised to see the difference in the look of volumes using the
>hardware compared to the software.  I have my program set up to switch
>the mapper from vtkVolumeRayCastMapper
>(vtkVolumeRayCastCompositeFunction) to vtkVolumeProMapper.  I am
>surprised to see the differences in color given the same
>vtkVolumeProperty color function.
>
>I'd like to know if this is the correct behavior for the hardware volume
>renderering? and if there is a way for them to function more like the
>software mapper.  Perhaps the scalar values used in the volume need to
>be a different range when using the two mappers.  Ideally, I'd like
>computers equipped with VolumePro hardware to behave the same as the
>computers that are using a software mapper.
>
>The following pictures are screenshots of the rendering while only
>switching the mapper.
>
>Software Rendering:
>http://www.attackforums.com/Screenshots/SoftwareVolumeRendering.jpg
>
>Hardware Rendering:
>http://www.attackforums.com/Screenshots/HardwareVolumeRendering.jpg
>
>Thanks,
>Alex
>
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