[osg-users] Draw Instanced

[Glenn Waldron]

That I do not know. But I do recall that my original DI implementation
tried to use UBOs, and I ditched them in favor of TBOs because of the size
limitations.

Glenn Waldron

On Fri, Apr 15, 2016 at 6:09 PM, sam <brkopac at gmail.com> wrote:

> Would there be a big performance difference between using a TextureBuffer
> Object and a UniformBuffer object?
>
> Thanks, Sam
>
> On Fri, Apr 15, 2016 at 1:15 PM, sam <brkopac at gmail.com> wrote:
>
>> Doh! Thanks, Glenn. Unfortunately I still have some holes in the map but
>> its starting to look considerably better. I will definitely looking to
>> using a TextureBuffer.
>>
>> On Fri, Apr 15, 2016 at 12:50 PM, Glenn Waldron <gwaldron at gmail.com>
>> wrote:
>>
>>> 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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>>>>
>>>
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>>
>
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