class AbstractProjection implements Projection {

    public void setModelCenter(Vector3d modelCenter)
    {
        myModelCenter = modelCenter;
        if (!Utilities.sameInstance(modelCenter, Vector3d.ORIGIN))
        {
            myModelViewAdjustment = new Matrix4d();
            myModelViewAdjustment.setTranslation(myModelCenter);
        }
        else
        {
            myModelViewAdjustment = null;
        }
    }

}