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

[Utkarsh Ayachit]

Afraid not. One potential work around would be you build the
transformation matrix and set that on the camera. You can build the
matrix yourself by changing the order of rotations.

Utkarsh

On Fri, Nov 24, 2017 at 1:43 PM, Léo Pessanha
<leonardopessanha74 at gmail.com> wrote:
> 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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>>
>