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fixacos
Langue: en
Version: version 4.2.2 (fedora - 05/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
fixacos - Fixed point inverse cosine lookup table. Allegro game programming library.SYNOPSIS
#include <allegro.h>fixed fixacos(fixed x);
DESCRIPTION
This function finds the inverse cosine of a value using a lookup table. The input value must be a fixed point radian. The inverse cosine is defined only in the domain from `-1' to `1'. Outside of this input range, the function will set `errno' to EDOM and return zero. Example:fixed result; /* Sets `result' to binary angle 128. */ result = fixacos(itofix(-1));
RETURN VALUE
Returns the inverse sine of a fixed point value, measured as fixed point binary format angle, or zero if the input was out of range. All return values of this function will be in the range `0' to `128'.SEE ALSO
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