[osg-users] HeightField Performance
jean-sebastien.guay at cm-labs.com
Thu Nov 12 17:55:34 PST 2009
> 1. Is this class the appropriate one for what I want to do?
I'm assuming you're using osg::HeightField with osg::ShapeDrawable - you
didn't specify... Please try to be more precise in the future.
In that case, no, it's not appropriate for large height fields. As
Robert has said many times in the past, anything using
osg::ShapeDrawable with an osg::Shape is meant for debugging and
quick-and-dirty tests, not for production use.
> 2. Are there other alternatives to it that would yield better performance
Whenever I've had to use height fields, I've always generated the
geometry myself, it's pretty easy to do. You'll want to use triangle
strips, and batch vertices together (experiment with different batch
sizes per vertex array, for example 1000 or 10000 or 100000 per vertex
array - different sized batches will be better on different generations
of video cards).
There is osgTerrain::HeightFieldLayer, but I'm not sure how much better
than osg::ShapeDrawable that is.
Perhaps others can suggest something else.
Hope this helps,
Jean-Sebastien Guay jean-sebastien.guay at cm-labs.com
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