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<DIV><FONT face=Arial size=2>Dear VTK-Users,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am, at present, writing a new reader which will
take in the colour data and present them to the volume renderer to allow it to
render the data. </FONT><FONT face=Arial size=2>What I have noticed (and
confirmed by this mail-list) is that the volume renderer is not able to handle
data with more than one component.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>However, I now have some questions about the volume
rendering process:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>1) If I cast the image (using vtkImageCast) into
unsigned ints instead of unsigned char/short, nothing is displayed, why is this?
Is it due to the renderer, or the volume mapper?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>2) If I supply the correct colour and opacity
transforms based on those ints (and returning unsigned chars) will the renderer
still show nothing? Will the transform be given those ints, or will they be cast
into chars/shorts in the mapper?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>3) I have been assuming that the renderer is only
supplied with the output of the transforms (the unsigned chars) is this
correct?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thank you for any help you can
give,<BR>Stephen</FONT></DIV></BODY></HTML>