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

[Ruggiero Guida]

I am using the 4.3.1 binary version downloaded from the website. I
generated my script starting from the trace as you suggest. Uncommenting
the ViewSize on your script works. The fact is that it does not work on
mine and i really don't understand why. I guess it is related to the
settings of the camera.

Have you tried to run my script on your machine? I would expect to have a
square image with the data fitted perfectly into it, but as soon as I
increase the ViewSize above 855x855, only the horizontal size increases. As
you can see from the VTK the source data is 24x24.

Thanks



On 11 September 2015 at 08:51, Dan Lipsa <dan.lipsa at kitware.com> wrote:

> 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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