[osg-users] Draw Instanced

[sam]

Do you have an example of the shader that you used?

On Mon, Apr 18, 2016 at 12:40 PM, Glenn Waldron <gwaldron at gmail.com> wrote:

> 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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