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

[Dan Lipsa]

What version of ParaView do you use? I run the script on a ParaView source
build from git master.


You should be able to do Tools / Start Trace, open your file and then save
it to the desired resolution. The script generated should tell you what
settings you need. You might need to uncomment the setting of the ViewSize.
This is what I had to do.

On Thu, Sep 10, 2015 at 6:41 PM, Ruggiero Guida <ruggiero.guida at gmail.com>
wrote:

> 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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>>
>
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