<div dir="ltr">Hi Mengda,<div class="gmail_extra"><br></div><div class="gmail_extra">I will suggest to figure out why it is crashing first. Even with only one node, it should still work.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Also, assuming you are using this method vtkContourWidget::Initialize( vtkPolyData * poly, int state = 1, vtkIdList *idList = NULL ), your input poly doesn't have any points?</div><div class="gmail_extra"><br></div><div class="gmail_extra">Yumin</div><div class="gmail_extra"><br></div><div class="gmail_extra"><div class="gmail_quote">On Fri, Jan 22, 2016 at 10:40 AM, Mengda Wu <span dir="ltr"><<a href="mailto:wumengda@gmail.com" target="_blank">wumengda@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr">Hi all,<div><br></div><div> I would like to set the state of vtkContourWidget to Manipulate at initialize and add the nodes programmably instead of interactively. Everything is fine but I have to check the there are at least 2 nodes in the following, otherwise AddNodeOnContour will crash</div><div><br></div><div>So I hope you can change the following function to</div><div><br></div></div></blockquote><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div></div><div>void vtkContourWidget::SelectAction( vtkAbstractWidget *w )<br></div><div>{</div><div><br></div><div>................</div><div>................</div><div><br></div><div><div> switch ( self->WidgetState )</div><div> {</div><div> case vtkContourWidget::Start:</div><div> case vtkContourWidget::Define:</div></div><div><div>................</div><div>................</div></div><div> case vtkContourWidget::Manipulate:<br></div><div><div> {</div><div> if ( rep->ActivateNode( X, Y ) )</div></div><div> {<br></div><div><div>................</div><div>................</div></div><div><div> }</div><div> else if ( rep->GetNumberOfNodes()>1 && rep->AddNodeOnContour( X, Y ) ) //Ensure the number of nodes is at least 2</div><div> {</div></div><div><div><div>................</div><div>................</div></div><div> }</div></div><div><div>................</div><div>................</div></div><div>}</div><div><br></div><div><br></div></div>
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