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<DIV><FONT size=2><FONT face=Arial><SPAN class=912391010-16122002>I am having a
hard time trying to understand the multiple data fields approach. From
what I can gather I <SPAN class=159373410-16122002>do the
following</SPAN></SPAN></FONT></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT size=2><FONT face=Arial><SPAN class=912391010-16122002>Set The
</SPAN>F<SPAN class=912391010-16122002>ile Name</SPAN></FONT></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=912391010-16122002>Set Reader to the
field I want.</SPAN></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=912391010-16122002>Read it into a
vtkDataArray</SPAN></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=912391010-16122002>Change where Reader
is set</SPAN></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=912391010-16122002>Read the next
DataArray and repeat until all the data is read.</SPAN></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=912391010-16122002>Then use
vtkAssignAttribute to choose the active arrays, build whatever I need and create
actors and associated mappers</SPAN></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=912391010-16122002>Then change the
attribute and repeat for the next data array until I have all the actors and
mappers</SPAN></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=912391010-16122002>Then render
them.</SPAN></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT size=2><FONT face=Arial><SPAN class=912391010-16122002>Problem - my
data is huge<SPAN class=159373410-16122002>,</SPAN> when I create the DataArrays
do they live in memory, or or does it just set up a pointer to a file which is
read when needed.<SPAN class=159373410-16122002> It just doesn't feel right to
have a huge (12M+) hunk of data just sitting in
memory</SPAN></SPAN></FONT></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=912391010-16122002>Before I discovered
Assign Attribute I was thinking of having two readers working from the same file
- would this work?</SPAN></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=912391010-16122002>Thanks</SPAN></FONT></DIV>
<DIV><SPAN class=912391010-16122002></SPAN><FONT face=Arial
size=2> </FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=912391010-16122002>Brenton</SPAN></FONT></DIV></DIV></BODY></HTML>