Inside Macintosh: Operating System Utilities /

Chapter 3 - Mathematical and Logical Utilities / Mathematical and Logical Utilities Reference

Routines / Performing Calculations on Fixed-Point Numbers

FracSqrt

You can use the FracSqrt function to obtain the square root of a Fract number.

FUNCTION FracSqrt (x: Fract): Fract;

x

The Fract number to obtain a square root of. This parameter is interpreted as being unsigned in the range 0 through 4 - 2-30, inclusive. That is, the bit of a Fract number that ordinarily has weight -2 is instead interpreted as having weight 2.

DESCRIPTION

The FracSqrt function returns the square root of the Fract number you supply in the x parameter. The result is unsigned in the range 0 through 2, inclusive.