Hello,<br><br>I want to get value of each point. The data is from vtkVolume16Reader, the typical header frequently seen in vtk, used in vtkMarchingCubes. Below is vtkVolume16Reader from sample code.<br>    vtkVolume16Reader *v16 = vtkVolume16Reader::New();<br>
    v16-&gt;SetDataDimensions(64,64);<br>    v16-&gt;GetOutput()-&gt;SetOrigin(0.0,0.0,0.0);<br>    v16-&gt;SetDataByteOrderToLittleEndian();<br>    v16-&gt;SetFilePrefix(&quot;/.../VTK/VTKData/Data/headsq/quarter&quot;);<br>
    v16-&gt;SetImageRange(1,93);<br>    v16-&gt;SetDataSpacing(3.2,3.2,1.5);<br>    v16-&gt;Update();<br>But how can I get value on each vertex? Please help. Best wishes.<br><br>Cheng<br>