# trame: multiple renderers/renderWindow

**URL:** https://discourse.paraview.org/t/trame-multiple-renderers-renderwindow/10856
**Category:** Web Support
**Created:** [November 24, 2022, 5:23pm UTC](https://discourse.paraview.org/t/trame-multiple-renderers-renderwindow/10856 "2022-11-24T17:23:45Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![albert](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/a/48db29/32.png) [@albert](https://discourse.paraview.org/u/albert)
#### Post date: [November 24, 2022, 5:23pm UTC](https://discourse.paraview.org/t/trame-multiple-renderers-renderwindow/10856/1 "2022-11-24T17:23:45Z")

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Hi all,

I have some doubts about how to handle multiple view of the same file (in local rendering). For example, I wanted to have two different views of the same object side by side (organized with vuetify row/cols). I wrote this code:

```auto
camera_1 = vtkCamera()
camera_1.SetPosition(.........)
camera_1.SetFocalPoint(.........)
camera_1.SetViewUp(.........)
camera_1.SetParallelScale(.........)

camera_2 = vtkCamera()
camera_2.SetPosition(.........)
camera_2.SetFocalPoint(.........)
camera_2.SetViewUp(.........)
camera_2.SetParallelScale(.........)

ren_1 = vtkRenderer()
ren_1.SetActiveCamera(camera_1)
ren_2 = vtkRenderer()
ren_2.SetActiveCamera(camera_2)

renWin_1 = vtkRenderWindow()
renWin_1.AddRenderer(ren_1)
renWin_1.SetWindowName("First")

renWin_2 = vtkRenderWindow()
renWin_2.AddRenderer(ren_2)
renWin_2.SetWindowName("Second")

iren_1 = vtkRenderWindowInteractor()
iren_1.SetRenderWindow(renWin_1)

iren_2 = vtkRenderWindowInteractor()
iren_2.SetRenderWindow(renWin_2)

mapper = vtkDataSetMapper()
mapper.SetInputConnection(reader.GetOutputPort())

actor = vtkActor()
actor.SetMapper(mapper)

ren_1.AddActor(actor)
ren_2.AddActor(actor)

```

Then in trame definition:

```auto
with SinglePageWithDrawerLayout(server) as layout:
    layout.title.set_text("Test")
    with layout.content:
        with vuetify.VRow(classes="fill-height"):   
            with vuetify.VCol(cols = 6):
                view = vtk.VtkLocalView(renWin_1)
            with vuetify.VCol(cols = 6):
                view = vtk.VtkLocalView(renWin_2)

```

But I obtain the same view in each one. Sometimes with the first camera position, sometimes with the second one (it seems to depend on the fact that I added some code, even unrelated to render definition. Strange behaviour…)

Is this the right way to manage this problem? Or am i doing something wrong?

Thanks

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<div class="post-metadata">

### Author: ![jourdain](https://discourse.paraview.org/user_avatar/discourse.paraview.org/jourdain/32/11_2.png) [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [December 1, 2022, 4:16pm UTC](https://discourse.paraview.org/t/trame-multiple-renderers-renderwindow/10856/2 "2022-12-01T16:16:14Z")

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Local rendering currently has an issue with multiple views. Nothing too bad to fix it but I needs to find the time. Hopefully the holiday break will be enough.

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<div class="post-metadata">

### Author: ![jourdain](https://discourse.paraview.org/user_avatar/discourse.paraview.org/jourdain/32/11_2.png) [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [December 4, 2022, 10:22pm UTC](https://discourse.paraview.org/t/trame-multiple-renderers-renderwindow/10856/3 "2022-12-04T22:22:26Z")

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I might have fixed it with `trame-vtk==2.0.10`. You can find [that example](https://github.com/Kitware/trame-vtk/blob/master/examples/validation/ManyViews.py) that test and use multiple views.

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<div class="post-metadata">

### Author: ![albert](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/a/48db29/32.png) [@albert](https://discourse.paraview.org/u/albert)
#### Post date: [December 6, 2022, 1:19pm UTC](https://discourse.paraview.org/t/trame-multiple-renderers-renderwindow/10856/4 "2022-12-06T13:19:56Z")

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Thank you Sebastien. I will look into in a few days