From: Sakns (gaitat++at++yahoo.com)
Date: 05/03/2000 01:39:14
pfHi!
In a scene graph when I ask for the bbox of each of the nodes I
get the bbox of the graph below that node. I would like to get the
accumulated bbox from the top of the tree for each of the nodes,
in a preCull function. So I added a preCull function to several
nodes in my scene graph using node->setTravFuncs. The first
argument to preCull is a pfTraverser whose getMat method returns
the accumulated matrix up to that node. But when I get the matrix
it is wrong. It seems that it is off by one always. If nodes (A B
C D) are children of the same parent, node A has the Identity
matrix, node B has the matrix that corresponds to A, C has that of
B... etc.
If instead of the preCull function I add a postCull function (same
code) then the matrix is correct but nothing get pruned when I
return PFTRAV_PRUNE, because of the order things gets executed.
(reading the pftraverser man pages)
Any suggestions?
pfThanks!
=====
Athanasios Gaitatzes (Saki)
e-mail: gaitat++at++yahoo.com
url: http://www.i.am/gaitatzes
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This archive was generated by hypermail 2b29 : Wed May 03 2000 - 01:39:21 PDT