<div dir="ltr"><span style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif">Deal all, </span><br style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif"><br style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif">
<span style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif">I'm trying to build depth map of my volume data.</span><div style="font-family:arial,sans-serif;font-size:14px"><span style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif"><br>
</span></div><div style="font-family:arial,sans-serif;font-size:14px"><span style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif"><br></span></div><div style="font-family:arial,sans-serif;font-size:14px">
<font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif">I followed the example here: </font></div><div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif"><br>
</font></div><div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif"><a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/Utilities/ZBuffer" target="_blank">http://www.vtk.org/Wiki/VTK/Examples/Cxx/Utilities/ZBuffer</a> to visualize the zbuffer.</font></div>
<div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif"><br></font></div><div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif">This works fine in polyData case.</font></div>
<div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif"><br></font></div><div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif"><br>
</font></div><div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif"><br></font></div><div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif">But I got empty map when volume rendering case.</font></div>
<div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif"><br></font></div><div style="font-family:arial,sans-serif;font-size:14px"><font face="Verdana, Geneva, Helvetica, Arial, sans-serif" color="#ff0000"><b>I need depth map for getting 3D position of the outer surface of the volume.</b></font></div>
<div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif"><br></font></div><div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif">And I have to use vtkOpenGLGPUVolumeRayCastMapper for rendering.</font></div>
<div style="font-family:arial,sans-serif;font-size:14px"><font color="#000000" face="Verdana, Geneva, Helvetica, Arial, sans-serif"><br></font></div><div style="font-family:arial,sans-serif;font-size:14px"><span style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif"><br>
</span></div><div style="font-family:arial,sans-serif;font-size:14px"><span style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif"><br></span></div><div style="font-family:arial,sans-serif;font-size:14px">
<br style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif"><span style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif">Does vtk provide any methods to achieve this? Or there is any examples I can follow? </span><br style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif">
<br style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif"><span style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif">Many thanks in advance. I look forward to hearing from you. </span><br style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif">
<br style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif"><span style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif">All bests </span><br style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif">
<span style="font-size:13px;font-family:Verdana,Geneva,Helvetica,Arial,sans-serif">Jeonghun Lim</span></div></div>