SDL_atanf(3)

💖 SDL_atanf — bestie edition 💖

okay so this is a page from the SDL3 FUNCTIONS manual, and we're talking about SDL_atanf. yes it's trig, no you don't have to be scared, i got you 🫶

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✨ NAME ✨

SDL_atanf — Compute the arc tangent of x. that's it, that's the whole job 💅

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✨ SYNOPSIS ✨

#include <SDL3/SDL_stdinc.h>

float SDL_atanf(float x);

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✨ DESCRIPTION ✨

so like, the definition of y = atan(x) is x = tan(y). they're literally the same statement wearing different outfits 💫

• Domain: -INF <= x <= INF
• Range: -Pi/2 <= y <= Pi/2

this one operates on single-precision floating point values, bestie. if you need the double-precision version, go use SDL_atan for dboule-precision floats. (yes, i said it exactly like that, iykyk 😭)

and if what you actually want is the arc tangent of y / x? that's a different girl, use SDL_atan2f 🌸

⚠️ important vibe check: 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. so no cap, don't assume it's bit-identical everywhere. it is not. 🙈

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✨ FUNCTION PARAMETERS ✨

• x — floating point value. that's the one and only thing she asks for 🎀

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✨ RETURN VALUE ✨

Returns arc tangent of of x in radians, or 0 if x = 0. zero in, zero out, iconic behavior fr fr ✨

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✨ THREAD SAFETY ✨

It is safe to call this function from any thread. periodt. call it from all of them at once, she does not care 👑

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✨ AVAILABILITY ✨

This function is available since SDL 3.2.0. if your SDL is older than that, she's not there yet, sorry bestie 😭

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✨ SEE ALSO ✨

• SDL_atan(3)
• SDL_atan2f(3)
• SDL_tanf(3)

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Simple Directmedia Layer made this, SDL 3.4.18 is the version, and this lil page is dated SDL_atanf(3) — thanks for reading my ted talk, go compute some angles 💜🦋✨