Hi ParaViewers, (Sorry if this double-posts!)
I am writing a ParaView Reader Plugin to get my data into ParaView via a vtkStructuredGrid object. I can load my plugin into ParaView via "Manage Plugins". My file type shows up in the "File-> Open" dialog. When PV_PLUGIN_DEBUG is set, the "Output Messages" window shows that the library was loaded successfully. When I select a file and click "Apply" in the object inspector, Paraview thinks for a split second before returning to an interactive state. However, no data appears & the "Information" tab of the object inspector sets nCells = 0; nPoints = 0; Memory = 0 MB and the X,Y,Z extents are "NA". My plugin reader derives from "vtkStructuredGridReader" and implements: * SetFileName * GetFileName * CanReadFile * RequestInformation, where I set the extents via: outInfo->Set(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),extent,6); * RequestData, where I obtain a vtkStructuredGrid via: vtkStructuredGrid *output = vtkStructuredGrid::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT())); I am not sure why the "Information" tab is showing an empty structured grid. My questions are: 1. How can I print debugging messages to stdout or Paraview's own "Output Messages" window? Specifically, I'd like to make sure that my X,Y,Z extents are being read properly from file. I tried vtkDebugMacro, but the data isn't being printed. 2. Have I implemented the appropriate functions that derive from vtkStructuredGridReader? 3. Should I derive instead from another class? When I derive from vtkStructuredGridAlgorithm, I get three error messages from vtkCompositeDataPipeline: "Input port 0 of algorithm vtkLFMReader(0x11f98a720) has 0 connections but is not optional". Can you offer any hints of how I can proceed to debug my reader? Thanks! Pete
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