void clearInfoFragment()
    {
        infoDisplayFrag = null;

        InfoFragDisplay fd = (InfoFragDisplay)(Component.FindObjectOfType(typeof(InfoFragDisplay)));
        MeshFilter      mf = (MeshFilter)fd.GetComponent("MeshFilter");

        mf.mesh = null;
    }
    void setInfoFragment(Fragment f)
    {
        if (infoDisplayFrag == f)
        {
            clearInfoFragment();

            return;
        }

        infoDisplayFrag = f;

        InfoFragDisplay fd = (InfoFragDisplay)(Component.FindObjectOfType(typeof(InfoFragDisplay)));
        MeshFilter      mf = (MeshFilter)fd.GetComponent("MeshFilter");

        mf.mesh = f.getModel();
    }