anonymous_namespace{MarkerResource.cpp} Namespace Reference

Functions
osg::Node *	buildImageModel (osg::Image *image)

---

Function Documentation

osg::Node* anonymous_namespace{MarkerResource.cpp}::buildImageModel

(

osg::Image *

image

)

Definition at line 37 of file MarkerResource.cpp.

    {
        float width = image->s();
        float height = image->t();

        osg::Geometry* geometry = new osg::Geometry;

        osg::Vec3Array* verts = new osg::Vec3Array(4);
        (*verts)[0] = osg::Vec3(-width/2.0f, -height/2.0, 0.0f);
        (*verts)[1] = osg::Vec3(width/2.0f, -height/2.0, 0.0f);
        (*verts)[2] = osg::Vec3(width/2.0f, height/2.0, 0.0f);
        (*verts)[3] = osg::Vec3(-width/2.0f,height/2.0, 0.0f);
        geometry->setVertexArray( verts );

        bool flip = image->getOrigin()==osg::Image::TOP_LEFT;

        osg::Vec2Array* texcoords = new osg::Vec2Array(4);
        (*texcoords)[0].set(0.0f,flip ? height-1.0f : 0.0f);
        (*texcoords)[1].set(width-1.0f,flip ? height-1.0f : 0.0f);
        (*texcoords)[2].set(width-1.0f,flip ? 0.0 : height-1.0f);
        (*texcoords)[3].set(0.0f,flip ? 0.0 : height-1.0f);
        geometry->setTexCoordArray(0, texcoords);

        osg::Vec4Array* colors = new osg::Vec4Array(1);
        (*colors)[0].set(1,1,1,1);
        geometry->setColorArray( colors );
        geometry->setColorBinding( osg::Geometry::BIND_OVERALL );

        geometry->addPrimitiveSet( new osg::DrawArrays(GL_QUADS, 0, 4));

        osg::StateSet* stateSet = geometry->getOrCreateStateSet();

        osg::TextureRectangle* texture = new osg::TextureRectangle( image );
        stateSet->setTextureAttributeAndModes(0, texture, osg::StateAttribute::ON);

        stateSet->setMode( GL_BLEND, 1 );
        stateSet->setRenderBinDetails( 95, "RenderBin" );
        stateSet->setAttributeAndModes( new osg::Depth(osg::Depth::ALWAYS,false), 1 );

        osg::Geode* geode = new osg::Geode;
        geode->addDrawable( geometry );

        //PixelAutoTransform* at = new PixelAutoTransform;
        //at->setMinPixelWidth( width );
        osg::AutoTransform* at = new osg::AutoTransform;
        at->setAutoScaleToScreen( true );
        at->setAutoRotateMode( osg::AutoTransform::ROTATE_TO_SCREEN );
        at->addChild( geode );
        return at;
    }

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