[vtkusers] vtkVolumePicker

[Richard Frank]

Hi David,

Thanks for the update. We’re going to migrate over to 7.0 (I presume that’s where your fix will go) as soon as the Renderer issue with LightKit I reported is resolved…


Thanks

Rick


> On Apr 28, 2016, at 2:29 PM, David Gobbi <david.gobbi at gmail.com> wrote:
> 
> Hi Richard,
> 
> I replicated the "transparent pick" bug you reported, and submitted a fix for review:
> https://gitlab.kitware.com/vtk/vtk/merge_requests/1467 <https://gitlab.kitware.com/vtk/vtk/merge_requests/1467>
> 
> The loop got stuck if the pick reached the camera's far clipping plane before
> either 1) finding an opaque voxel or 2) exiting through the rear of the volume.
> 
>  - David
> 
> On Fri, Apr 22, 2016 at 7:25 AM, David Gobbi <david.gobbi at gmail.com <mailto:david.gobbi at gmail.com>> wrote:
> On Fri, Apr 22, 2016 at 7:10 AM, Richard Frank <rickfrank at me.com <mailto:rickfrank at me.com>> wrote:
> 
> I also found an issue where in some cases the Ray trace loop ( in vtkCellPicker ) would get stuck. 
> 
> While ( t1 < tLast ) // something like this
> 
> Etc 
> 
> In the particular instance, which seemed to be a click on an "empty" transparent area, t1 would get stuck at 1.0 " fore ever"  ...
> 
> So I subclassed it to work around and if t1 stays a 1.0 +- tiny e for >200 loops I break out.
> 
> Thanks for the info, there must be a bug.  I'll take a look at that loop.
> 
>  - David 
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtkusers/attachments/20160428/611b4640/attachment.html>