Dr Colin Bridgewater (crccobr++at++nocrc.abb.no)
Thu, 20 Nov 1997 15:47:21 +0100
Michael T. Jones wrote:
> 2. disable geometric cull testing for that node **AND ALL
> OF IT'S PARENTS UP TO THE ROOT**. this is necessarially
> so since the cull testing is hierarchical in nature.
Just curious about why Steve used PFTRAV_CONT and not PFTRAV_PRUNE to
alter the behaviour of the cull traversal. Otherwise his answer to the
original posting was very helpful, as per usual.
The reason I asked was because the node in question may be a group node
representing an assembly of components. If so, there will be a lot of
child nodes to leave alone as well. I wasn't too sure what would happen
in that case and so thought PFTRAV_PRUNE might have been better than
writing a node traversal function for each child as well.
> Not a good flag to set on the root node, methinks.
Just my warped sense of humour, I'm afraid. Should have put a smiley or
something after it (grin).
Regards
Colin
PS I don't have access to a machine to try things out on at the moment
so I'm really just thinking out loud.....
_______________________________________________________________________
Dr Colin Bridgewater crccobr++at++nocrc.abb.no Marine Oil and Gas Dept
ABB Teknologi AS, Bergerveien 12, PO Box 91, N-1361 BILLINGSTAD, Norway
work tel: +47 66 84 35 36, fax: +47 66 84 35 41, home: +44 1189 671713
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