[Paraview] Programmatically create a Contour filter

[mathieu.westphal at gmail.com]

Hello

The following code give me a segfault, can't find why :

    // input port
    QMap< QString, QList< pqOutputPort* > > input;
    input.insert( QString( "Input" ), arrivalTimes->getOutputPorts() );

    pqObjectBuilder* builder =
        pqApplicationCore::instance()->getObjectBuilder();
    pqPipelineSource* waveFront = builder->createFilter( "filters","Contour", input, server );


    vtkSMProxy * locator = builder->createProxy( "incremental_point_locators", "NonMergingPointLocator", server, "Locator", "WaveFrontLocator" );
    if( waveFront )
    {   
        // Edit other properties
        vtkSMPropertyHelper( waveFront->getProxy(), "SelectInputScalars" ).Set( arrivalTimesOutput.toAscii().data() );
        vtkSMPropertyHelper( waveFront->getProxy(), "ComputeNormals" ).Set( true );
        vtkSMPropertyHelper( waveFront->getProxy(), "ComputeGradients" ).Set( false );
        vtkSMPropertyHelper( waveFront->getProxy(), "ComputeScalars" ).Set( false );
        vtkSMPropertyHelper( waveFront->getProxy(), "GenerateTriangles" ).Set( true );
        vtkSMPropertyHelper( waveFront->getProxy(), "ContourValues" ).Set( 0 );
        vtkSMPropertyHelper( waveFront->getProxy(), "Locator" ).Set( &locator, 1 );
    }   
    return waveFront;