[osg-users] Draw Instanced

[Glenn Waldron]

Sam,
I think you are not calling setNumElements() on your uniform array. You
could also do that in the osg::Uniform constructor.

Anyway, a uniform array of matrices is going to be limiting in terms of
scale and speed -- I'd recommend a buffer object instead. (osgEarth uses an
osg::TextureBuffer.)


Glenn Waldron

On Fri, Apr 15, 2016 at 2:35 PM, sam <brkopac at gmail.com> wrote:

> Hi All,
>
> I'm having some trouble getting my code to use hardware instancing. I've
> referenced OSGEarth, DrawInstanced example, and a few different code
> samples on the web. I've gotten pretty close but I seem to be at a bit of
> an impasse.
>
> This screenshot shows what the map looks like with the default rendering:
>
> http://imgur.com/fKvunfd
>
> This screenshot shows what the map looks like after I apply my instance
> rendering code to it:
>
> http://imgur.com/zZCzurr
>
> The map is composed of a lot of little nodes. I figured instanced
> rendering would be helpful in this case. The map has ~4000 individual
> nodes. Two of the nodes are repeated 465 and 266 times. I have trimmed down
> my code and it is posted here:
>
> http://pastebin.com/ifSVSzD6
>
> From what it looks like. Its rendering one copy of every nodes but not
> anymore that that. I have commented out lines 215 to 224 as it doesn't work
> at all. Any insight or help would be greatly appreciated.
>
> Thanks, Sam
>
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