[Paraview] Paraview 4.3.1 Python - Screenshot of specific size and ratio

[Ruggiero Guida]

Thanks Dan.

The image saved is 648 x 639 (see attached). What I am not understanding is
the relation between ViewSize, camera settings and actual image size in
pixels.

I would like to use paraview to render some textures that I will be using
in my code and I need the image ti fit perfectly the content.

On 10 September 2015 at 23:19, Dan Lipsa <dan.lipsa at kitware.com> wrote:

> Ruggiero,
> The following script saves a 100x100 sphere.
> I created it using the trace option in ParaView.
>
>
> On Thu, Sep 10, 2015 at 5:07 AM, Ruggiero Guida <ruggiero.guida at gmail.com>
> wrote:
>
>> I am trying to create a screenshot of a specific size from a [VTK
>> file][1].
>> This is the code I am using
>>
>>     from paraview.simple import *
>>     paraview.simple._DisableFirstRenderCameraReset()
>>     rad_map = LegacyVTKReader(FileNames=['test.vtk'])
>>
>>     # get active view
>>     renderView1 = GetActiveViewOrCreate('RenderView')
>>     dpi = 70
>>     heigth = 24.39846235421442
>>     width = 24.398462354214413
>>     width_p = int(width * dpi)
>>     heigth_p = int(heigth * dpi)
>>     renderView1.ViewSize = [width_p, heigth_p]
>>
>>     # reset view to fit data
>>     #renderView1.ResetCamera()
>>
>>     # current camera placement for renderView1
>>     renderView1.CameraParallelProjection = 1
>>     renderView1.CameraPosition = [5, 5, 1000]
>>     renderView1.CameraFocalPoint = [5, 5, 0.0]
>>     renderView1.CameraViewUp = [0.0, 1.0, 0.0]
>>     scale = (heigth) / 2.0
>>     renderView1.CameraParallelScale = scale
>>
>>     Render()
>>     SaveScreenshot("/Users/ruggiero/dev/test.png", magnification=1)
>>
>> The problem is that the `ViewSize` seems to be ignored and I keep having
>> images of fixed size 1707 × 855. The height 855 seems to be a kind of
>> limit; the only way to get what I want is to limit the `ViewSize` to
>> 855x855.
>>
>> I have checked [this][2] question and [this][3] question, but with no
>> success.
>>
>> Any idea? I am not very confident in the settings for the camera. Could
>> this be the issue?
>>
>>
>>   [1]: https://dl.dropboxusercontent.com/u/1342856/test.vtk
>>   [2]:
>> http://stackoverflow.com/questions/31930448/in-python-script-for-paraview-can-i-specify-the-resolution-when-i-do-a-savescre
>>   [3]:
>> http://stackoverflow.com/questions/27430588/paraview-python-command-to-save-picture-of-defined-size
>>
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