C++ (Cpp) VirtualProgram::setFunctionMinRangeの例

コード例 #1

ファイル: osgearth_shadercomp.cpp プロジェクト: rhabacker/osgearth

    osg::Group* run(osg::Node* node)
    {
        float radius = osgEarth::SpatialReference::get("wgs84")->getEllipsoid()->getRadiusEquator();

        VirtualProgram* vp = VirtualProgram::getOrCreate(node->getOrCreateStateSet());

        // Install the shader function:
        vp->setFunction("make_it_red", fragShader, ShaderComp::LOCATION_FRAGMENT_LIGHTING);

        // Set a maximum LOD range for the above function:
        vp->setFunctionMinRange( "make_it_red", 500000 );
        vp->setFunctionMaxRange( "make_it_red", 1000000 );

        osg::Group* g = new osg::Group();

        // Install a callback that will convey the LOD range to the shader LOD.
        g->addCullCallback( new RangeUniformCullCallback() );

        g->addChild( node );
        return g;
    }