How to prevent RequestData after update pipeline?

Development
1

Hello dear Paraview developers!

I use the following pattern to get the dataset on the client side

  if (filter)
  {
    //[WHAT FOR?]
    filter->UpdatePipeline();
    dataSet = vtkDataSet::SafeDownCast(vtkAlgorithm::SafeDownCast(filter->GetClientSideObject())->GetOutputDataObject(sourcePortNumber));
  }

But I dont want the RequestData to be called by update pipeline
Could you please explain how to do it?

Thank u!

2

I dont want the RequestData to be called by update pipeline

This is what UpdatePipeline does, why are you calling UpdatePipeline in the first place ?

3

I have a custom filter with non-costly RequestDataObject, and very costly RequestData

I create a filter

filter = vtkSrcPrxyPtr::Take(vtkSMSourceProxy::SafeDownCast(proxyManager->NewProxy("filters", "ClientServerMoveData"))

And set the current proxy as the input for it.

And then call update pipeline, because otherwise it does not get any data

But I dont want the UpdatePipeline call requestData for my custom filter!

4

RequestDataObject is not supposed to generate Data, only the DataObject. Why do you want to get only the data obect ?

5

I could have misunderstood the concept

Could you please clarify the difference between Data and DataObject?

6

DataObject → a vtkPolyDatan without any points or cells in it

Data → a vtkPolyData with cells and points in it

7

Does DataObject contain fieldData?

When I get dataset without UpdatePipeline, but with GetCliendSideObject (i have built in mode), it seems there are no fields in the dataset

8

After RequestDataObject, the resulting data object is expected to be fully empty.