[vtkusers] simple vtk application

[Dženan Zukić]

Hundred independent actors is quite normal, the performance problems start
occurring with many thousands of actors.

You don't have to remove actors, you can turn off  their visibility
actor->SetVisibility(0);

On Wed, Aug 24, 2011 at 04:04, Florian Bruckner <e0425375 at gmail.com> wrote:

> ok, but can you tell which one of the 2 designs is more efficient for
> some cases:
>
> In my case i have multiple files that should be displayed at once (say
> max. 16. If I have time-series then there will always be max.16 files
> at a time). These files contain an unstructured grid as well as some
> vector / scalar data. Mainly I want to be able to display the grid and
> then toggle the vectordata (glyph) on and off. The scalar data should
> only change the color. So my intention was to create one mapper/actor
> for the structure and one mapper/actor for the glyph per file.
> Switching glyph on and off is then done by simple adding / removing
> the mapper to the proper renderer (there could be more than one if
> some files should be displayed next to each other). so this
> approximately would give 2*16 actors which are active at a time. do
> you think this could be a performance problem?
>
> if i would use this combine-filter i cannot control the color settings
> of structure and glyph seperately, right? because then this method is
> no option for me. E.g. I would like display the geometry with opacity
> and gray color if the glyph is switched on.
>
> thanks Alex for your fast reply
> FloB
>
>
> On Wed, Aug 24, 2011 at 1:43 AM, Alex Malyushytskyy
> <alexmalvtk at gmail.com> wrote:
> > First, there are a multiple ways you can do things in vtk.
> >
> > Using multiple actors make sense only if you need an ability easy
> > separate object from other objects and might be not efficient
> > if you have large number of objects ( if your data has more than few
> > hundred objects (pieces/files,) I will avoid using one actor per
> > object.
> >
> > You also probably don't need multiple renderers.
> >
> > In my practice mostly often I used 2 designs:
> >
> > 1.  per file: Reader -> filter -> actor
> > One window and one renderer per application
> >
> > 2  per file: Reader -> filter ->
> >
> > every filter(s) output goes to combining filter as an input (for
> > example vtkAppendPolyData)
> >
> > combining filter-> actor ->
> > still one  window and one renderer per application
> >
> >
> >
> >
> >
> > On Tue, Aug 23, 2011 at 3:26 AM, Florian Bruckner <e0425375 at gmail.com>
> wrote:
> >> hi, i'm new to vtk and i have a few design questions. I want to write a
> >> simple visualization tool for our data. It should support multiple input
> >> files and different filters for each input file. Each filter then needs
> >> a mapper and an actor, if I understand that correctly. All those things
> >> should be put into an new class asdf_input.
> >>
> >> Finally there is an renderer window where the data should be displayed.
> >> So I would add the proper actors from the asdf_input object and add them
> >> to multiple renderers. Then these multiple renderers are added to the
> >> renderer window. All these things are put into another class
> >> asdf_output.
> >>
> >> So this is the first plan. But after looking over the vtk class
> >> reference i found vtkView, vtkDataRepresentation, ... and i was
> >> wondering whether there is already something very similar available.
> >>
> >> So my question is whether there is already some top-level class
> >> available, which allows to simplify the handling of multiple
> >> input/filters/renderers.
> >>
> >> greetings
> >> Florian
> >>
> >>
> >> _______________________________________________
> >> 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 VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
> >>
> >> Follow this link to subscribe/unsubscribe:
> >> http://www.vtk.org/mailman/listinfo/vtkusers
> >>
> > _______________________________________________
> > 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 VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
> >
> > Follow this link to subscribe/unsubscribe:
> > http://www.vtk.org/mailman/listinfo/vtkusers
> >
> _______________________________________________
> 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 VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20110824/82069fe8/attachment.htm>