[osg-users] #pragmatic composition : setDefine

[Trajce Nikolov NICK]

Thanks Sebastian,

I thought it would be that easy

Cheers,
Nick

On Tue, Apr 21, 2015 at 7:33 AM, Sebastian Messerschmidt <
sebastian.messerschmidt at gmx.de> wrote:

>  Hi Nick,
>
>        Hi Robert, all,
>
>  I finally ported all my shaders to the this new thing. I have a question.
> Probably simple but will go anyway
>
>  in my shader I have something like
>
>  #define MYDEFINE
>  .. do stuff here ...
>  #endif
>
>  at the root of the scene I have
>  stateSet->setDefine("MYDEFINE");
>
>  how can I fornid this define somewhere down the tree ? Simple removing it
> is not helping (as expected I guess).
>
> Do you mean "unsetting"?
> Then simply do setDefines("MYDEFINE", osg::StateAttribute::OFF) where you
> like it to have it disabled.
> The rules for the overriding / protecting apply to this as well.
>
>
>  Any sample how the defines with Values set works?
>
> Simply by setDefine("MY_VALUE_DEFINE", "42", osg::StateAttribute::ON)
>
> or Roberts example defining a function:
>
> stateset->setDefine("VERTEX_FUNC(v)" , "vec4(v.x, v.y, v.z *
> sin(osg_SimulationTime), v.w)");
>
>
>  Thanks a bunch !
>
>  Nick
>
> --
> trajce nikolov nick
>
>
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-- 
trajce nikolov nick
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