Hi Eldar
Only the second way is good,
but create an uniform with 5 element and not 20.
in your "for loop" be sure sz == 5.
Otherwise all is good in the code you show us.
HTH
David
2012/5/8 Eldar Insafutdinov <e.insafutdi...@gmail.com>
> Hi
>
> I am trying to use uniform arrays with OSG, but it fails. Here are the
> snippets of code that a'm using:
>
>
> Code:
>
> osg::StateSet *ss = node->getOrCreateStateSet();
>
> // one way of populating uniform array that I tried
> for(int i = 0; i < sz; ++i)
> {
> char buf[30];
> sprintf(buf, "colourPoints[%d]", i);
> osg::Vec3 colour = osg::Vec3(1.0, 0.0, 1.0);
> ss->addUniform(new osg::Uniform(buf, osg::Vec4(colour, 1.0)));
> }
>
> // another way
> osg::Uniform *colourPoints = new osg::Uniform(osg::Uniform::FLOAT_VEC4,
> "colourPoints", 20);
> for(int i = 0; i < sz; ++i)
> {
> osg::Vec3 colour = osg::Vec3(1.0, 0.0, 1.0);
> colourPoints->setElement(i, osg::Vec4(colour, 1.0));
> }
> ss->addUniform(colourPoints);
>
> // and glsl
> uniform vec4 colourPoints[5];
>
> void main(void)
> {
> vec4 col = colourPoints[1];
> gl_FragColor = col;
> }
>
>
>
>
> I tried to set up uniforms both ways but neither of them worked and all I
> get is a black colour. It must be something obvious that I am missing..
>
> Cheers,
> Eldar
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=47598#47598
>
>
>
>
>
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