[osg-users] Paint splashes / How do I decal?

[Sebastian Messerschmidt]

Hi Johny
> And why not a geometry approach?
You can totally use 3d models, but that might induce z-fighting, sorting 
problems etc. Another option is of course using a world-space spanning 
texture per object-instance and managing drawing to this texture at the 
right spots. This isn't very memory friendly however.

It seemed to me, that you have a multipass-shader implementation anyways 
so using screen space decals might be the best option. (And I've got 
good experiences using it)

Cheers
Sebastian
>
>
> SMesserschmidt wrote:
>> Hi Johny,
>>
>>
>>> Here's Johny!
>>>
>>> I'd like to know how to pick a 3d point in my model onto which a decal will nearly wrap itself around to. Am I using the right word here, or does Open Scene Graph not have this feature? Before I'm rigging my app with a custom decal, I'd like to know what's available, or what tools I can already work with.
>>>
>> There is no specific API, but you can use projective texturing or
>> screenspace decals (using FBO and shaders).
>>
>> Cheers
>> Sebastian
>>
>>>
>>> Thank is great.
>>>
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