[sldev] Questions on avatars and distances

[Dale Glass]

Ok, since the llOwnerSay idea bumped into a limitation, I'm back to trying to 
add an avatar scanner into the client. I'm making some progress:

http://daleglass.net/images/screenshots/scanner.jpg

It's going pretty well, but rather slowly due to other things to do. I'll be 
releasing a patch as soon as I have something prettier and usable.

Now some questions:

What's the difference between LLVector3 and LLVector3d?

And related to that, why does gAgent.getPositionGlobal() return LLVector3d, 
while LLVOAvatar::getCharacterPosition returns a LLVector3 and must be 
converted to LLVector3d to find the distance between me and somebody else?

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