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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>David, <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The second example is what I want since I need to assign the caption to certain point in a 3D object. However, in the example, the caption itself does not move when I rotate the sphere. My question is how to make it move along with the 3D object during rotation.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thank you so much.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Xiaopeng<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> David Doria [mailto:daviddoria@gmail.com] <br><b>Sent:</b> Friday, August 26, 2011 8:33 PM<br><b>To:</b> Xiaopeng Yang<br><b>Cc:</b> vtkusers@vtk.org<br><b>Subject:</b> Re: [vtkusers] Put labels onto image<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Fri, Aug 26, 2011 at 3:43 AM, Xiaopeng Yang <<a href="mailto:yxp233@postech.ac.kr">yxp233@postech.ac.kr</a>> wrote:<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'>Hi Wayne,</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'>It works good. Thank you. However, when I rotate the 3D object, the caption which associated with a point on the 3D object should be covered (invisible) when that point is rotated to the backside (invisible). But is always visible and appear on the object, which can mislead the user to know the position of the caption.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'>Do you have any good idea to avoid this happening?</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'>Thanks,</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'>Xiaopeng</span><o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>CaptionActor2D is great for 2D, but for 3D I think you'll want:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal><a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/Follower">http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/Follower</a><o:p></o:p></p></div><div><p class=MsoNormal>or<o:p></o:p></p></div><div><p class=MsoNormal><a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/Widgets/Caption">http://www.vtk.org/Wiki/VTK/Examples/Cxx/Widgets/Caption</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>David <o:p></o:p></p></div></div></div></body></html>