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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Hi Wayne,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><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.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Do you have any good idea to avoid this happening?<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Xiaopeng<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><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";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> vtkusers-bounces@vtk.org [mailto:vtkusers-bounces@vtk.org] <b>On Behalf Of </b>Wayne Christopher<br><b>Sent:</b> Friday, August 26, 2011 1:03 PM<br><b>To:</b> vtkusers@vtk.org<br><b>Subject:</b> Re: [vtkusers] Put labels onto image<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I think what you need is a vtkCaptionActor2D. It is pretty much what you are describing. <br><br> Wayne<br><br>On 8/25/11 6:25 PM, Xiaopeng Yang wrote: <o:p></o:p></p><p class=MsoNormal>Dear Users,<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>I created several 3D objects, including sphere, cone, cylinder, and box. Then those objects were visualized on the same screen. My question is how to put labels on those objects, such as “Cone” on the cone, and “Cylinder” on the cylinder. And then, if I rotate the objects, the labels are also rotated in a synchronized pattern. <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Could anybody give me any ideas?<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Thank you.<o:p></o:p></p><p class=MsoNormal>Xiaopeng<o:p></o:p></p></div></body></html>