Re: Nodes for one particular channel

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Russell Suter (russell++at++ctasim.com)
Mon, 21 Apr 1997 10:11:07 -0700

On Apr 21, 8:22am, Jean BENOIT wrote:
> Subject: Nodes for one particular channel
> I use a multiChannel app. with the same BDD. so I share the scene between
> all my channels. but I need to insert a flt models, in only one of these
> channels, not in the others. how can i do ???
> I think about one no optimize solution : don' t share the scene, and
> duplicate it for all the channels,. but I'm sure that it's not the best
> solution.
>

Look at pfNodeTravMask and pfChanTravMask. From the man page of
pfChanTravMask:

     pfChanTravMask sets chan's drawing mask and is used in conjunction with
     pfNodeTravMask for selective culling and drawing of scene graphs on a
     per-pfChannel basis. During the traversal, the bitwise AND of the
     traversal mask and the node mask is computed. If the result is non-zero,
     the node is culled or drawn as usual. If off (zero), the behavior is as
     follows depending on trav:

          PFTRAV_CULL
               Node is not culled and is considered to be entirely within the
               viewing frustum. The cull traversal traverses the node and its
               children without any view culling.

          PFTRAV_DRAW
               Node is completely ignored. Both cull and draw traversals skip
               the node and its children.

     Node traversal masks are set by pfNodeTravMask. The default pfNode and
     pfChannel masks are 0xffffffff so that a pfChannel culls and draws all
     pfNodes.

> Yo
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>-- End of excerpt from Jean BENOIT

-- 
Russ
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