d-point calculations are faster than the corresponding floating-point math, so if you want to optimize your code, you should use the GEOS fixed-point structures with the GEOS math routines.</P>
<P CLASS="figTitle">
Code Display 5-2 GEOS Data Structures</P>
<PRE><A NAME="IX_Fixed point numbers"> </A>/* Fixed-Point Structures
 *    The following structures are used to represent fixed-point numbers:
 *    numbers with a fractional portion and an integral portion. Notice that
 *    there are several formats of 