RE: Performance Problems with Billboards

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Jenny Zhao (zhz++at++dandan.engr.sgi.com)
Fri, 19 Feb 1999 10:03:48 -0800

Eric Webster wrote:
> For better
> performance, you should normally have multiple
> GeoSets per billboard node.

This is exactly right.

Sibylle, take a look at /usr/share/Performer/src/lib/libpfdu/pfdBillboard.c
it implements the function pfdCombineBillboards(pfNode *node, int sizeLimit)
which traverses the scene under node and combines GeoSets from multiple
billboards and put them under one billboard.
If you don't want to write your own combine code at construction time,
then just call pfdCombineBillboards on
your myScene node after it is fully constructed.
You need to experiment with the value for sizeLimit.

Jenny Zhao zhz++at++engr.sgi.com 650 933-5091

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