NAME¶

SDL_acos - Compute the arc cosine of x.

SYNOPSIS¶

#include <SDL3/SDL_stdinc.h>

double SDL_acos(double x);

DESCRIPTION¶

The definition of y = acos(x) is x = cos(y).

Domain: -1 <= x <= 1

Range: 0 <= y <= Pi

This function operates on double-precision floating point values, use SDL_acosf for single-precision floats.

This function may use a different approximation across different versions, platforms and configurations. i.e, it can return a different value given the same input on different machines or operating systems, or if SDL is updated.

FUNCTION PARAMETERS¶

x

floating point value.

RETURN VALUE¶

Returns arc cosine of x, in radians.

THREAD SAFETY¶

It is safe to call this function from any thread.

AVAILABILITY¶

This function is available since SDL 3.2.0.

SEE ALSO¶

SDL_acosf(3), SDL_asin(3), SDL_cos(3)