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<p style="margin-top:0;margin-bottom:0">Hi,</p>

<p style="margin-top:0;margin-bottom:0">I would like to label the keypoint which is closest to the 0, 0, 0 with a marker or label.</p>

<p style="margin-top:0;margin-bottom:0">How can I SetColor to the extracted point?</p>

<p style="margin-top:0;margin-bottom:0"><br>

</p>

<p style="margin-top:0;margin-bottom:0">Below is my code:</p>

<p style="margin-top:0;margin-bottom:0"></p>

<div><span style="white-space:pre"></span>// Find the k closest points to (0,0,0)</div>

<div><span style="white-space:pre"></span>unsigned int k = 1;</div>

<div><span style="white-space:pre"></span>double testPoint[3] = { 0.0, 0.0, 0.0 };</div>

<div><span style="white-space:pre"></span></div>

<div><span style="white-space:pre"></span>vtkSmartPointer<vtkIdList> result =</div>

<div><span style="white-space:pre"></span>vtkSmartPointer<vtkIdList>::New();</div>

<div><span style="white-space:pre"></span>pointTree->FindClosestNPoints(k, testPoint, result);</div>

<div><span style="white-space:pre"></span></div>

<div><span style="white-space:pre"></span>for (vtkIdType i = 0; i < k; i++)</div>

<div><span style="white-space:pre"></span>{</div>

<div><span style="white-space:pre"></span>vtkIdType point_ind = result->GetId(i);</div>

<div><span style="white-space:pre"></span>double p[3];</div>

<div><span style="white-space:pre"></span>point->GetPoint(point_ind, p);</div>

<div><span style="white-space:pre"></span></div>

<div><span style="white-space:pre"></span>std::cout << "Closest point " << i << ": Point "</div>

<div><span style="white-space:pre"></span><< point_ind << ": (" << p[0] << ", " << p[1] << ", " << p[2] << ")" << std::endl;<span style="white-space:pre">

</span></div>

<div><span style="white-space:pre"></span>}</div>

<br>

<p></p>

<p style="margin-top:0;margin-bottom:0">Thank you so much!</p>

<p style="margin-top:0;margin-bottom:0"><br>

</p>

<p style="margin-top:0;margin-bottom:0">Regards,</p>

<p style="margin-top:0;margin-bottom:0">Polly</p>

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