Re: [osg-users] OSGEarth precision

2009-02-04 Thread Robert Osfield
Hi David, I haven't dived into the source code of osgEarth, but I do know that it utilises osgTerrain, and osgTerrain internally uses double to locate tiles in their geocentric position (the class that does this is the osgTerrain::Locator). When the geometry for rendering is generated on demand

Re: [osg-users] OSGEarth precision

2009-02-04 Thread Glenn Waldron
David, I'll just chime in for the record to echo Robert's correct assessment -- osgEarth uses osgTerrain under the hood, and osgTerrain solves the precision issue by localizing each tile at each level of detail with a double-precision matrix. Glenn Waldron : Pelican Mapping :

[osg-users] OSGEarth precision

2009-02-03 Thread David Karlsson
Hi, Is OSGEarth suitable to use, as a part of a terrain simulator, together with objects that needs to be positioned with about cm precision - or will I run into problems with precision? I found this page about how they handled it in NASA's World Wind: