New particle system

yay
Because lookAt has been used more often than that. In general I would try
to not add more methods to the current API and try to use what's already
there. We can add methods later if we see a real need for it but for now I
would keep changes to a minimum.

On Thu, Sep 25, 2014 at 10:22 PM, guycalledfrank <notifications@github.com>
wrote:

> In src/scene/scene_graphnode.js:
>
> > @@ -1078,6 +1115,37 @@ pc.extend(pc.scene, function () {
> >              }
> >          }(),
> >
>
> Well, I just looked at how lookAt was implemented in the engine, and saw
> it in both mat4 and graphnode, so I thought that's the way to add. So the
> question then is: why lookAt has to be in graphnode and not only in mat4?
>
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