(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)

Draft

THIS PAGE IS A WORK IN PROGRESS ... Please make edits to this page to improve it!

SDL_acos

Use this function to compute arc cosine of x.

Syntax

double SDL_acos(double x);

Function Parameters

x	floating point value, in radians.

Return Value

Returns arc cosine of x.

Remarks

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

Domain: -1 <= x <= 1

Range: 0 <= y <= Pi

Version

This function is available since SDL 3.0.0.

Code Examples

/* acos(x) = Pi/2 - asin(x) */
SDL_Log("acos(0):\t\t%f", SDL_acos(0));
SDL_Log("Pi/2 - asin(0):\t%f", M_PI / 2 - SDL_asin(0));

/* acos(-x) = Pi  - acos(x) */
SDL_Log("acos(-(-1)):\t%f", SDL_acos(-(-1)));
SDL_Log("Pi - acos(-1):\t%f", M_PI - SDL_acos(-1));

---

CategoryAPI, CategoryStandard, CategoryDraft

---

[ edit | delete | history | feedback | raw ]

[ front page | index | search | recent changes | git repo | offline html ]

All wiki content is licensed under Creative Commons Attribution 4.0 International (CC BY 4.0).
Wiki powered by ghwikipp.