[Paraview] howto move an object depending on actual time

[Florian Bruckner]

hi, thanks alot for the fast reply. DATA_TIME_STEP was the variable that 
i was looking for.
here is my "Programmable Filter Script" that is able to translate an 
object into a given direction depending on the actual timestep.

### paraview programmable filter script for translation of object 
depending on timestep

from vtk import vtkDataObject

from paraview.vtk import dataset_adapter as DA


speed = [0.0004, 0.000, 0.000]


# define input and output

pdi = self.GetInputDataObject(0,0)

pdo = self.GetOutputDataObject(0)

pdo.CopyAttributes(pdi)


# get current time-step

step = pdi.GetInformation().Get(vtkDataObject.DATA_TIME_STEP())


# move object

old_pts = inputs[0].Points

new_pts = old_pts

for i in range(3):

new_pts[:,i] = old_pts[:,i] + step * speed[i]


arr = DA.numpyTovtkDataArray(new_pts, 'newpts')

pdo.GetPoints().SetData(arr)



greetings
FloB



On 09/16/2014 02:41 PM, Utkarsh Ayachit wrote:
> I'd suggest using "Programmable Filter" instead of "Python
> Calculator". Refer to vtkTimeToTexConvertor::RequestData() [1] for how
> to access DATA_TIME_STEP value. You can write an equivalent script in
> "Script" part for the Programmable Filter to access the time value.
>
> Utkarsh
>
> [1] https://github.com/Kitware/ParaView/blob/ad70367102a1d9779435e9949d84a576e68a6ee8/ParaViewCore/VTKExtensions/Default/vtkTimeToTextConvertor.cxx
>
>
> On Tue, Sep 16, 2014 at 6:33 AM, Florian Bruckner <e0425375 at gmail.com> wrote:
>> hello,
>>
>> i would like to create an animation of moving objects using the animation
>> view. unfortunately the positions of the objects stored within the data file
>> are stationary, so i have to manually define the movement anyhow.
>>
>> is there a simple method to archive this using the animation inspector? (i
>> am using paraview 4.1.0)
>>
>> alternatively i found a method to use the python calculator to translate the
>> object. if i could access the actual time it would be possible to define the
>> trajectory of the moving particle. is this possible?
>>
>> thanks
>> FloB
>>
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