SDL_atan - Man Page

Defined in SDL3/SDL_stdinc.h

#include "SDL3/SDL.h"

double SDL_atan(double x);

The definition of y=atan(x) is x=tan(y) .

Domain: -INF<=x<=INF Range: -Pi/2<=y<=Pi/2 This function operates on double-precision floating point values, use

SDL_atanf
for single-precision floats.

To calculate the arc tangent of y / x, use SDL_atan2 .

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.

x

floating point value.

Returns arc tangent of of x in radians, or 0 if x=0 .

It is safe to call this function from any thread.

This function is available since SDL 3.2.0.

·(3), SDL_atanf(3), ·(3), SDL_atan2(3), ·(3), SDL_tan(3)

SDL_atan2(3), SDL_atan2f(3), SDL_atanf(3), SDL_tan(3).