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

Ruggiero Guida ruggiero.guida at gmail.com
Mon Sep 14 19:59:08 EDT 2015 

I have noticed that if I run the script in paraview python shell the size
settings are ignored and the UI settings are used instead - in my case
648x639. If I run it from pvpython with paraview closed then the size will
be 1000x855 or whatever horizontal resolution i specify x 855.

Thanks
Ruggiero

On 15 Sep 2015, at 05:47, Dan Lipsa <dan.lipsa at kitware.com> wrote:

I was wandering because I thought you used a different script than what I
sent. If you only changed the palette it should not make a difference. I am
on Linux. Maybe there is a problem with screenshot saving on MacOS. Maybe
someone else with a mac could try this. If not, I am in the process of
getting a mac laptop, I'll try to remember to try this out when I get my
new laptop.

Dan


On Mon, Sep 14, 2015 at 5:43 PM, Ruggiero Guida <ruggiero.guida at gmail.com>
wrote:

> Not sure I said that I'm on Mac OS X.
>
> Re: palette. No reason, I prefer a white background and I was
> experimenting with the colour mappings from colorbrewer
>
>
> Sent from Outlook <http://aka.ms/Ox5hz3>
>
>
>
>
> On Mon, Sep 14, 2015 at 9:51 AM -0700, "Dan Lipsa" <dan.lipsa at kitware.com>
> wrote:
>
> Hmm,
>> I tried
>> ~/ParaView-4.3.1-Linux-64bit/bin/pvpython test.py
>>
>> and still created the right png - see attached.
>> I notice you have a different color palette. Why is that?
>>
>>
>> On Mon, Sep 14, 2015 at 8:11 AM, Ruggiero Guida <ruggiero.guida at gmail.com
>> > wrote:
>>
>>> Thanks Dan.
>>>
>>> Run you script through pvpython. No modifications apart from the
>>> filenames. I still have an image with 1000x855 size (see attached).
>>>
>>> I will try to build paraview from source to see if this changes.
>>>
>>> Thanks
>>>
>>> <image.png>
>>>
>>> On 12 September 2015 at 02:04, Dan Lipsa <dan.lipsa at kitware.com> wrote:
>>>
>>>> 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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