Text Outline pixelated on close up

[Rodrigo Dias]

Hi,

I'm creating text objects that lie over the map, indicating the name of some cities. Pure white text was hard to read (the background represents vegetation, so it's colored, but some parts are white). Adding an outline solved that, but on close up, the outline looks pixelated and ugly. Using a drop_shadow also looks fine from a distance, but strange from a small distance, since the black shadow doesn't touch the white text. Is there something I can do to improve the appearance of the outline from close up, or to reduce the distance between the shadow and the text?

osg::Node* createLabel(const osg::Vec3& pos, float size, const std::string& label, osgText::Text::AxisAlignment axisAlignment)
{
    osg::Geode* geode = new osg::Geode();
    {
        osgText::Text* text = new osgText::Text;
        geode->addDrawable( text );
        text->setPosition(pos);
        text->setCharacterSize(size);
        text->setAxisAlignment(axisAlignment);
        text->setAlignment(osgText::Text::CENTER_CENTER);
        text->setBackdropType(osgText::Text::OUTLINE); // DROP_SHADOW_BOTTOM_RIGHT
        text->setBackdropColor(osg::Vec4(0.0f, 0.0f, 0.0f, 0.5f));
        std::string dest = desaxUTF8( label );
        text->setText( dest );
    }
    return geode;
}

Thanks,

Rodrigo.

[OpenSceneGraph Users]

Hi Rodrigo,

From the looks of it you are using the osgText's default font that really is just there as a fallback, it's not intended for normal application usage.  The OSG has support for using true type fronts, this support is provided by the freetype plugin, make sure this is being built (requires the freetype library to be installed) and assign a font to the Text.  See the osgtext example so see how different fonts are set.

Cheers,

Robert.

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[Rodrigo Dias]

Thank you, Robert!

freetype solved it.

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