Hi all,<br><br>I want to pick some points on the surface nearest to me. <br><br>But when I use vtkPointPicker to pick points, some of them pass through the nearest surface to the next one. <br><br>Could someone tell me the reason and what can I do to prevent it? <br>
<br>Thanks a lot!<br><br><br>                                                                                     <span class="keyword">Julia</span><br><br>                                                                                 <br>