[Paraview] Python Scripting - Acess vtkOpenGL cameras from .pvx files information

[Utkarsh Ayachit]

Leo,

To handle 90-degree pitch or elevation, do the following:

camera.Pitch(90)
camera.OrthogonalizeViewUp()
Render()

Utkarsh


On Tue, Oct 24, 2017 at 2:50 PM, Léo Pessanha <leonardopessanha74 at gmail.com>
wrote:

> Thanks Utkarsh!
>
> This change would take a build right? Can't do it right now =/
>
> My goal is to know what should I do after a
>
> cameraInstance.Pitch(90)
>>
>
> and before a
>
> Render()
>>
>
> In order not to get the warning
>
> Resetting view-up since view plane normal is parallel
>>
>
> I've tried
>
> cameraInstance.ComputeViewPlaneNormal()
>>
>
> but with no sucess...
>
> Do you know why and can explain me the reason of this warning ?
> More important, how to get rid of it? hahaha
> My goal trying to print the camera attributes was to debug this info!
>
> Thanks in advance!
>
>
>
> Leonardo Pessanha
> Laboratory of Computational Methods in Engineering
> Federal University of Rio de Janeiro - COPPE
> Rio de Janeiro, RJ, Brasil
>
>
> 2017-10-23 13:01 GMT-02:00 Utkarsh Ayachit <utkarsh.ayachit at kitware.com>:
>
>> Leo,
>>
>> You can't access it in Python since the Python script is not run on the
>> server side. If your goal is to debug what thet camera is set to, you can
>> put cout's to print the camera in `vtkCaveSynchronizedRenderers::HandleStartRender`.
>> That's where the local camera on each rank is "prepped" for rendering a
>> frame.
>>
>> Utkarsh
>>
>> On Mon, Oct 23, 2017 at 9:20 AM, Léo Pessanha <
>> leonardopessanha74 at gmail.com> wrote:
>>
>>> Hi!
>>>
>>> I would like to know if there's a way to acess the
>>> information/attributes of the cameras there are created trough a .pvx file
>>>
>>> To acess the attributes in the camera of the active Layout/RenderView  I
>>> do:
>>>
>>> 1 - Open Python Shell
>>> 2 - camera = GetActiveCamera()
>>> 3 - print(camera)
>>>
>>> And the output is:
>>>
>>> vtkOpenGLCamera (0x4a45e80)
>>>
>>> Debug: Off
>>>
>>> Modified Time: 405029
>>>
>>> Reference Count: 5
>>>
>>> Registered Events:
>>>
>>> Registered Observers:
>>>
>>> (none)
>>>
>>> ClippingRange: (1.63277, 5.56498)
>>>
>>> DirectionOfProjection: (0.526409, 0.492965, -0.692733)
>>>
>>> Distance: 3.37001
>>>
>>> EyeAngle: 2
>>>
>>> FocalDisk: 1
>>>
>>> FocalPoint: (0, 0, 0)
>>>
>>> ViewShear: (0, 0, 1)
>>>
>>> ParallelProjection: Off
>>>
>>> ParallelScale: 0.872667
>>>
>>> Position: (-1.77401, -1.6613, 2.33452)
>>>
>>> Stereo: Off
>>>
>>> Left Eye: 1
>>>
>>> Thickness: 3.93221
>>>
>>> ViewAngle: 30
>>>
>>> UseHorizontalViewAngle: 0
>>>
>>> UserTransform: (none)
>>>
>>> (none)
>>>
>>> FreezeFocalPoint: (none)
>>>
>>> ViewPlaneNormal: (-0.526409, -0.492965, 0.692733)
>>>
>>> ViewUp: (-0.0865543, 0.841596, 0.533127)
>>>
>>> WindowCenter: (0, 0)
>>>
>>> UseOffAxisProjection: (0)
>>>
>>> ScreenBottomLeft: (-0.5, -0.5, -0.5)
>>>
>>> ScreenBottomRight: (0.5, -0.5, -0.5)
>>>
>>> ScreenTopRight: (0.5, 0.5, -0.5)
>>>
>>> EyeSeparation: (0.06)
>>>
>>> WorldToScreenMatrix: (0x4a457c0
>>>
>>> Debug: Off
>>>
>>> Modified Time: 155883
>>>
>>> Reference Count: 1
>>>
>>> Registered Events: (none)
>>>
>>> Elements:
>>>
>>> 1 0 0 0
>>>
>>> 0 1 0 0
>>>
>>> 0 0 1 0
>>>
>>> 0 0 0 1
>>>
>>> )
>>>
>>> EyeTransformMatrix: (0x4a458b0
>>>
>>> Debug: Off
>>>
>>> Modified Time: 155885
>>>
>>> Reference Count: 1
>>>
>>> Registered Events: (none)
>>>
>>> Elements:
>>>
>>> 1 0 0 0
>>>
>>> 0 1 0 0
>>>
>>> 0 0 1 0
>>>
>>> 0 0 0 1
>>>
>>> )
>>>
>>> ModelTransformMatrix: (0x4a459a0
>>>
>>> Debug: Off
>>>
>>> Modified Time: 155887
>>>
>>> Reference Count: 1
>>>
>>> Registered Events: (none)
>>>
>>> Elements:
>>>
>>> 1 0 0 0
>>>
>>> 0 1 0 0
>>>
>>> 0 0 1 0
>>>
>>> 0 0 0 1
>>>
>>> )
>>>
>>> ProjectionTransform: (0x4a46280
>>>
>>> Debug: Off
>>>
>>> Modified Time: 405415
>>>
>>> Reference Count: 1
>>>
>>> Registered Events: (none)
>>>
>>> Inverse: (0)
>>>
>>> Matrix: (0x4a46330)
>>>
>>> Debug: Off
>>>
>>> Modified Time: 405416
>>>
>>> Reference Count: 1
>>>
>>> Registered Events: (none)
>>>
>>> Elements:
>>>
>>> 3.76067 0 0 0
>>>
>>> 0 3.73205 0 0
>>>
>>> 0 0 -1.83046 -4.62147
>>>
>>> 0 0 -1 0
>>>
>>> Input: (0)
>>>
>>> InverseFlag: 0
>>>
>>> NumberOfConcatenatedTransforms: 1
>>>
>>> 0: vtkSimpleTransform at 0x6ecdae0
>>>
>>> )
>>>
>>>
>>> *How to get these informations of the cameras created from a .pvx file?*
>>>
>>>
>>>
>>> Thanks in advance,
>>> Leonardo Pessanha
>>> Laboratory of Computational Methods in Engineering
>>> Federal University of Rio de Janeiro - COPPE
>>> Rio de Janeiro, RJ, Brasil
>>>
>>>
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>>
>
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