On 4/10/2016 1:37 PM, Bald Eagle wrote:
> The coordinate system is a static "thing"  It doesn't "do" anything.
> Look_at just determines what direction the camera is pointing when it's at a
> given location ("vector").

Just one thing to mention. There are two coordinate systems*, Y up and Z 
up. Depends if you are a mathematician or an engineer. Moray used Z up. 
There is also left hand and right hand versions too.
One of the reasons I use a modeller I cannot visualise scenes well 
enough to be a true Pover.


* Not counting all the fancy ones like Polar, Plücker, cylindrical etc.

-- 

Regards
     Stephen

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