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

[Léo Pessanha]

Thank you again for your help, Utkarsh!

Your solution worked but it flicks a lot because of the gimbal lock, but I
believe I could not get rid of that. Right?

Thanks in advance!

Leonardo Pessanha
Laboratory of Computational Methods in Engineering
Federal University of Rio de Janeiro - COPPE
Rio de Janeiro, RJ, Brasil


2017-10-25 11:12 GMT-03:00 Utkarsh Ayachit <utkarsh.ayachit at kitware.com>:

> 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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