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<DIV><SPAN class=862313015-28062004></SPAN><FONT face=Arial><FONT
color=#008000>Hi Lisa,</FONT></FONT></DIV>
<DIV><FONT face=Arial><FONT color=#008000></FONT></FONT> </DIV>
<DIV><FONT><FONT><FONT face=Arial><FONT color=#008000>T<SPAN
class=862313015-28062004>hanks for pointing out these two different functions
which I did not notice. vtkVolumeRaycastMapper->SetSampleDistance(0.2) solved
the problem. What is the range and default value for the sample distance?
Thanks. Yang</SPAN></FONT></FONT></FONT></FONT></DIV>
<DIV><FONT><FONT><FONT face=Arial><FONT color=#008000><SPAN
class=862313015-28062004></SPAN></FONT></FONT></FONT></FONT> </DIV>
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<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Lisa Avila
[mailto:lisa.avila@kitware.com] <BR><B>Sent:</B> Monday, June 28, 2004 10:21
AM<BR><B>To:</B> Xianjin Yang<BR><B>Subject:</B> Re: [vtkusers] Volume Rendering
with vtkVolumeRaycastMapper<BR><BR></FONT></DIV>Hi Yang,<BR><BR>Did you change
the SampleDistance (not ImageSampleDistance)? <BR><BR>Lisa<BR><BR><BR>At 10:01
AM 6/28/2004, you wrote:<BR><BR>
<BLOCKQUOTE class=cite cite="" type="cite"><FONT size=2></FONT> <BR><FONT
size=2>Hi vtkusers,</FONT> <BR><BR><FONT size=2>I did volume rendering with
vtkVolumeRaycastMapper and the volume image looks fine (see the left image in
the attachment). I set the color opacity to 0 to turn the color below orange
transparent and expected a smooth "isosurface". The problem is that the image
surface looked jagged like the image rendered with vtkVolumeTextureMapper2D
(the right image). I tried finer data grid, lights, and ImageSampleDistance,
but no use. Will someone please tell me if I missed anything?
<BR></FONT><BR><FONT size=2>Thanks a lot.</FONT> <BR><BR><FONT
size=2>Yang</FONT> <BR><BR><FONT face="Arial, Helvetica"
size=2><<raycast.jpg>>
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