Hi, I've modified the osg billboard example and am examining the pixel size 
computed from one of the billboard's bounding spheres. 

I'm sure I'm missing something fundamental in my understanding of what's going 
on, but I expected the pixel size computed by pixelSize() to correspond to the 
length of the billboard's diagonal as measured on the screen?

Can anyone explain to me the relationship between the pixel size returned from 
the pixelSize() function and the on-screen pixel size (ie. of the billboard) in 
this instance?

Many thanks

Paul

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http://forum.openscenegraph.org/viewtopic.php?p=30598#30598





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