public Vector3D getVertex(int index) {
        tmpV.setX(cornerX.get(index));
        tmpV.setY(cornerY.get(index));
        tmpV.setZ(cornerZ.get(index));
        calcG();
        return tmpV;
    }
public Vector3D getVertex ( int index ) { tmpV . setX ( cornerX . get ( index ) ) ; tmpV . setY ( cornerY . get ( index ) ) ; tmpV . setZ ( cornerZ . get ( index ) ) ; calcG ( ) ; return tmpV ; }
Gets the corner of Polygon.

@param index The index number of the corner.
@return The coordinates of the corner.