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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='text-autospace:none'>I am using vtkClipPolyData to clip polydata geometry in combination with <span style='font-size:9.5pt;font-family:Consolas'>vtkImplicitPlaneWidget2. It works well but apparently after clipping, the original Ids corresponding to each point (in my case, an atom) in polydata geometry is recomputed. Since I am using the original Ids for picking and highlighting the corresponding residues in another view window, after clipping, the picking and highlighting does not pick the right atom and residue because the Ids are changed after clipping. Is there a way to keep the original Ids after clipping?<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'>Thanks for any pointers on this,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:9.5pt;font-family:Consolas'>Hong<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>