<div>Hi Randall, Faith,</div>
<div> </div>
<div>I gave vtkProjectedTetrahedraMapper a try for the first time today but I experienced the longest render times with it out of any of the other mappers. I'm wondering what your input data being rendered is? Mine is a vtkImageData volume with dimensions of 256x256x56. The fixed point mapper or 3d texture mapper give me the fastest results.
<br> </div>
<div>Mark<br> </div>
<div><span class="gmail_quote">On 2/6/06, <b class="gmail_sendername">Randall Hand</b> <<a href="mailto:randall.hand@gmail.com">randall.hand@gmail.com</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">I think the best results will actually come from using the vtkProjectedTetrahedraMapper - <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.vtk.org/doc/release/5.0/html/a01919.html" target="_blank">
http://www.vtk.org/doc/release/5.0/html/a01919.html</a><br><br>I've pretty much tried them all. The vtkVolumeRayCastMapper took about an hour to generate an image for me, the vtkFixedPointRayCastMapper cut it down to about 30 minutes. The vtkProjectedTetrahedraMapper takes the cake, however, at a whopping 5 minutes. Unfortunately, it does take alot more memory as it requires you to "tetrahedralize" your mesh.
<div><span class="e" id="q_10941631a90f2f94_1"><br><br>
<div><span class="gmail_quote">On 2/6/06, <b class="gmail_sendername"><a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:flin@enders.tch.harvard.edu" target="_blank">flin@enders.tch.harvard.edu</a></b>
<<a onclick="return top.js.OpenExtLink(window,event,this)" href="mailto:flin@enders.tch.harvard.edu" target="_blank">flin@enders.tch.harvard.edu </a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">Hello all,<br><br>I need some advice on how much imporvement the<br>vtkFixedPointVolumeRayCastMapper will make vs. regular
<br>vtkVolumeRayCastMapper ? I'm doing volume rendering of roughly<br>250x80x150 voxels, and the speed is unacceptable. Any suggestions on how<br>to speed up? Specifically, how to use hardware to accelerate it?<br><br>
Thanks.<br><br>/faith<br><br><br>_______________________________________________<br>This is the private VTK discussion list.<br>Please keep messages on-topic. Check the FAQ at: <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">
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</a><br></blockquote></div><br><br clear="all"><br></span></div><span class="sg">-- <br>Randall Hand <br>Visualization Scientist, <br>ERDC-MSRC Vicksburg, MS<br>Homepage: <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.yeraze.com/" target="_blank">
http://www.yeraze.com</a> </span><br>_______________________________________________<br>This is the private VTK discussion list.<br>Please keep messages on-topic. Check the FAQ at: <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">
http://www.vtk.org/Wiki/VTK_FAQ</a><br>Follow this link to subscribe/unsubscribe:<br><a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers
</a><br><br><br></blockquote></div><br>