mx_geompropvalue_vector4.osl

void mx_geompropvalue_vector4(string geomprop, vector4 defaultVal, output vector4 out)
{
    float value[4];
    if (getattribute(geomprop, value) == 0)
    {
        out = defaultVal;
    }
    else
    {
        out.x = value[0];
        out.y = value[1];
        out.z = value[2];
        out.w = value[3];
    }
}