<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi ParaView Community,<br><br>I'm programming a filter, and I would like to call the vtkExtractEdges filter from it. Since my filter acts on vtkPolyData, it extends vtkPolyDataAlgorithm.<br><br>The problem is, the requestData() method of all filters are made protected, so that only derived classes are able to call it. Hence, I can't see how can I call this method from inside the body of my filter's code. <br><br>What's the usual way to do things such this ? <br><br>Thanks in advance,<br>Rafael March.<br></td></tr></table><br>