32-bit signed integer coordinates double won't be able to handle
2048-bit (64 * 32) integers as they will overflow its exponent. On the
gcc compiler it's possible to use 80-bit long doubles for both fpt
types, however this is not supported by MSVC compiler.</li>
        <li>efpt_type and to_efpt_converter_type are not used to construct Voronoi diagram of points (mocks will work fine).</li>
        <li>
For an example of the user defined coordinate type traits
see <a href="voronoi_advanced_tutorial.htm">adva