TexturePMObs* PrimitiveObs::getTexturePMObs()
{
    static TexturePMObs* _texturePMObs = NULL; // init to NULL
    return _texturePMObs;
}

void PrimitiveObs::setTexturePMObs(TexturePMObs* texturePMObs)
{
    static TexturePMObs _texturePMObs = NULL; // need this or else te linker will give an error about undefined reference
    PrimitiveObs::_texturePMObs = texturePMObs;
}