code

I got this code for computing a Oriented Bounding Box from www.magic-software.com. Can someone explain to me whats happening and how to use this function.

void Box2::ComputeVertices (Vector2 akVertex[4]) const
{
    Vector2 akEAxis[2] =
    {
        m_afExtent[0]*m_akAxis[0],
        m_afExtent[1]*m_akAxis[1]
    };

    akVertex[0] = m_kCenter - akEAxis[0] - akEAxis[1];
    akVertex[1] = m_kCenter + akEAxis[0] - akEAxis[1];
    akVertex[2] = m_kCenter + akEAxis[0] + akEAxis[1];
    akVertex[3] = m_kCenter - akEAxis[0] + akEAxis[1];
}
 

The code is called MgcBox2.cpp under 2d core.