Hi Peter,
To use the vtkDebugMacro, do a "this->DebugOn()" in your constructor.
You could just use cerr if you are Linux/mac and launch
paraview/pvserver from a terminal. Doing a "output->Print(cerr);" at
the end of request data would prove that you did what you think.
You could use vtkErrorMacro to get stuff into PV 's window.
Burlen
Peter Schmitt wrote:
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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