devela::_dep::sdl3::sys::stdinc

Function SDL_acosf

pub unsafe extern "C" fn SDL_acosf(x: f32) -> f32
Available on crate feature dep_sdl3 only.
Expand description

Compute the arc cosine of x.

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

Domain: -1 <= x <= 1

Range: 0 <= y <= Pi

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

§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