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

[Dan Lipsa]

Ruggiero,
Attached is the script I used on ParaView master. It saves a 1000x1000 png.
I had to uncomment renderView1.ViewSize and change the magnification for
SaveScreenshot to 1.

Dan



On Thu, Sep 10, 2015 at 9:38 PM, Ruggiero Guida <ruggiero.guida at gmail.com>
wrote:

> Attached. Thanks for checking.
>
> On 11 September 2015 at 09:34, Dan Lipsa <dan.lipsa at kitware.com> wrote:
>
>> If you send me your test.vtk I can try to generate the script on my
>> machine.
>>
>> Dan
>>
>>
>> On Thu, Sep 10, 2015 at 9:10 PM, Ruggiero Guida <ruggiero.guida at gmail.com
>> > wrote:
>>
>>> 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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