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<DIV><FONT face=&#23435;&#20307; size=2>Here's some code I got from the list 
before:</FONT></DIV>
<DIV><FONT face=&#23435;&#20307; size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=&#23435;&#20307; 
size=2>********************************************</FONT></DIV>
<DIV>vtk3DSImporter* importer = 
vtk3DSImporter::New();<BR>importer-&gt;ComputeNormalsOn();<BR>importer-&gt;SetFileName("747.3DS");<BR>importer-&gt;Read();<BR>vtkRenderWindow 
*renWin = vtkRenderWindow::New();<BR>renWin = 
importer-&gt;GetRenderWindow();<BR>renWin-&gt;SetNumberOfLayers(2);<BR>vtkRenderer 
*ren = vtkRenderer::New();<BR>ren-&gt;InteractiveOn();<BR>vtkBMPReader *reader = 
vtkBMPReader::New();<BR>reader-&gt;SetFileName("test24BIT.bmp");<BR>reader-&gt;Update();<BR>vtkImageData 
*imageData = reader-&gt;GetOutput();<BR>int a[3];<BR>int numCols;<BR>int 
numRows;<BR>int z;<BR>imageData-&gt;GetDimensions(a);<BR>numCols = 
a[0];<BR>numRows = a[1];<BR>z = a[2];<BR>// scan [[reader GetOutput] 
GetDimensions] "%d %d %d" numCols numRows z<BR><BR>vtkImageActor *actor = 
vtkImageActor::New();<BR>actor-&gt;SetInput(reader-&gt;GetOutput());<BR>ren1-&gt;AddActor(actor);<BR>ren1-&gt;InteractiveOff();<BR>ren1-&gt;GetActiveCamera()-&gt;ParallelProjectionOn();<BR>ren1-&gt;GetActiveCamera()-&gt;SetParallelScale(numRows/2);<BR><BR>renWin-&gt;SetSize(numCols,numRows);<BR>renWin-&gt;AddRenderer(ren1);<BR>ren1-&gt;SetLayer(1);<BR>ren-&gt;SetLayer(0);<BR>vtkRenderWindowInteractor 
*iren = 
vtkRenderWindowInteractor::New();<BR><BR>iren-&gt;SetRenderWindow(renWin);<BR><BR>iren-&gt;Initialize();<BR>iren-&gt;Start();<BR><FONT 
face=&#23435;&#20307; size=2>*********************************************</FONT></DIV>
<DIV><FONT face=&#23435;&#20307; size=2></FONT>&nbsp;</DIV>
<DIV>VTK 
v4.2.4:<BR>-----------<BR>self.renwin.AddRenderer(self.axisRenderer)<BR>self.renwin.SetNumberOfLayers(2)<BR>self.main.ren.SetLayer(1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
# &lt;--<BR>self.axisRenderer.SetLayer(0)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; # 
&lt;--<BR><BR>VTK 
v4.5.0:<BR>-----------<BR>self.renwin.AddRenderer(self.axisRenderer)<BR>self.renwin.SetNumberOfLayers(2)<BR>self.main.ren.SetLayer(0)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
# &lt;--<BR>self.axisRenderer.SetLayer(1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; # 
&lt;--<BR></DIV></BODY></HTML>