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other versions
- bookworm 2:4.4.3.1-3
- testing 2:4.4.3.1-4
- unstable 2:4.4.3.1-4.1
- experimental 2:4.4.3.1-4.1~exp2
fixatan(3alleg4) | Allegro manual | fixatan(3alleg4) |
NAME¶
fixatan - Fixed point inverse tangent lookup table. Allegro game programming library.
SYNOPSIS¶
#include <allegro.h>
fixed fixatan(fixed x);
DESCRIPTION¶
This function finds the inverse tangent of a value using a lookup table. The input value must be a fixed point radian. The inverse tangent is the value whose tangent is `x'. Example:
fixed result;
/* Sets `result' to binary angle 13. */
result = fixatan(ftofix(0.326));
RETURN VALUE¶
Returns the inverse tangent of a fixed point value, measured as a fixed point binary format angle.
SEE ALSO¶
version 4.4.3 | Allegro |