All,
I was wanting some feedback for those who have used osgSim in querying VPB database info such has HAT, LOS, etc., during runtime. I'm seeing some performance issues when using osgSim::HeightAboveTerrain::computeHeightAboveTerrain(.) to get the HAT value for a particular location in the database. At times, we need multiple HAT values per frame which seems to bog the performance down. I would surmise that LOS calculations are probably worse since multiple intersections are computed. My question is, is how efficient is the osgSim HAT function? Is the process of retrieving HAT a slow one? If so, is there a way to improve performance if one or more HAT requests are issued on a per frame basis? Thanks in advance, -Shayne
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