[sldev] Client FPS & LLQuaternions

[Kent Quirk (Q Linden)]

A quaternion can be used as a way of expressing a 3D rotation. Second  
Life uses unit quaternions, which would normally be expressed as four  
real numbers.

As far as I can tell, the Message_Layout page is correct -- it should  
be 16 bytes, or four F32 values.

What makes you say it's only 12? The AgentUpdate message is zerocoded  
-- are you perhaps getting misled because zero values are compressed?

	Q



On Feb 17, 2008, at 8:19 PM, Thomas Grimshaw wrote:

> Secondly, LLQuaternions
>
> Could somebody please update this wiki page:
>
> http://wiki.secondlife.com/wiki/Message_Layout
>
> to describe the correct LLQuaternion specification. That page  
> describes it as 16 bytes, however it seems both the official client  
> and LibSL sends 12 bytes in the AgentUpdate packet. What gives?