Hi,
I wrote one a while back and I did it another way.
in the constructor:
this->SetNumberOfInputPorts(2);
add a couple of methods like this:
void vtkBlahFilter::SetDataSet1Connection(vtkAlgorithmOutput* algOutput)
{
this->SetInputConnection(0, algOutput);
}
void vtkBlahFilter::SetDataSet2Connection(vtkAlgorithmOutput* algOutput)
{
this->SetInputConnection(0, algOutput);
}
in request data, the two data set are in the first two information
vector entries:
vtkInformation *inInfo;
inInfo = inputVector[0]->GetInformationObject(0);
dataSet1=vtkBlahDataSet::SafeDownCast(inInfo->Get(vtkDataObject::DATA_OBJECT()));
inInfo = inputVector[1]->GetInformationObject(0);
dataSet2=vtkBlahDataSet::SafeDownCast(inInfo->Get(vtkDataObject::DATA_OBJECT()));
in the filters.xml:
<InputProperty
name="Input"
command="SetDataSet1Connection">
<ProxyGroupDomain name="groups">
<Group name="sources"/>
<Group name="filters"/>
</ProxyGroupDomain>
<DataTypeDomain name="input_type">
<DataType value="vtkBlahDataSet"/>
</DataTypeDomain>
</InputProperty>
<InputProperty
name="Source"
command="SetDataSet2Connection">
<ProxyGroupDomain name="groups">
<Group name="sources"/>
<Group name="filters"/>
</ProxyGroupDomain>
<DataTypeDomain name="input_type">
<DataType value="vtkBlahDataSet"/>
</DataTypeDomain>
</InputProperty>
I think that is all. Not sure it's the best way, but it worked.
Natalie Happenhofer wrote:
Hi!
I´m trying to write a filter with multiple inputs, in my case I need
two datasets as input to this filter. In order to achieve that, I have
the following routine in my code:
int vtkTauFilter::FillInputInformation(int port, vtkInformation* info)
{
info -> Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(),"vtkDataSet");
info -> Set(vtkAlgorithm::INPUT_IS_REPEATABLE(), 1);
return 1;
}
and I put in the /Servers/ServerManager/Resources/filters.xml file the
following:
<SourceProxy name="TauFilter" class="vtkTauFilter" label="TauFilter">
....
<InputProperty name="Input" command="AddInputConnection"
clean_command="RemoveAllInputs" multiple_input="1">
<ProxyGroupDomain name="groups">
<Group name="sources"/>
<Group name="filters"/>
</ProxyGroupDomain>
...
</SourceProxy>
Compiling Paraview works fine, but I get the error:
ERROR: In /ParaView-3.4.0/VTK/Filtering/vtkDemandDrivenPipeline.cxx,
line 732
vtkCompositeDataPipeline (0x357dd50): Input port 0 of algorithm
vtkTauFilter(0x357bff0) has 2 connections but is not repeatable.
Does anyone know what´s could be the problem here?
thx a lot,
Natalie
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