[vtkusers] vtkProgressBar attached to an actor

[Andrea Gavana]

Hi David,

On Mon, 3 Dec 2018 at 17.34, David Gobbi <david.gobbi at gmail.com> wrote:

> Hi Andrea,
>
> A generic way of doing this is to write a callback for vtkRenderer's
> StartEvent.  Then every time the renderer is preparing to render the scene,
> it will call your callback, and your callback can set the position of the
> 2D actors.  The vtkCoordinate class provides a convenient way of converting
> from 3D to 2D coordinates.
>
> Other than callbacks, I don't think there's any way to do it.  The VTK
> label actors can be used to automatically position text at 3D locations,
> but there don't seem to be any classes for placing an arbitrary 2D actor at
> a 3D location.
>


Thank you for your answer. I’ll give it a go and see if I can make it work.

Andrea.


>
>   David
>
> On Mon, Dec 3, 2018 at 9:09 AM Andrea Gavana <andrea.gavana at gmail.com>
> wrote:
>
>> Hello everyone,
>>
>>     I’ve been googling around without much success until now, so I am
>> turning to this kind mailing list for suggestions.
>>
>> I have a 3D scene with multiple unstructured grids and some STL actors at
>> defined positions (in 3D). I would like to be able to “attach” a progress
>> bar to each of these STL actors - as my scene in rendered in a time
>> dependent way, with the user able to go back and forth in time, it would
>> make a nice touch for what I’m showing.
>>
>> Now, it seems to me vtkProgressBarWidget is a 2D animal, so I’m unclear
>> how I can place it below the STL actor and anche it there even if the user
>> zooms/pans the 3D window.
>>
>> Maybe what I’m trying to accomplish is simply not possible, but I’m open
>> to all suggestions you may have.
>>
>> Thank you in advance.
>>
>> Andrea.
>>
>
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