---
name: "al_fixtorad_r"
section: "3"
platform: "linux"
package: "allegro"
version: "5.2.11.3-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/al_fixtorad_r"
---

# al\_fixtorad\_r(3)

Allegro 5 API

## NAME

al\_fixtorad\_r - Allegro 5 API

## SYNOPSIS

-

  ```
  #include <allegro5/allegro.h>
  const al_fixed al_fixtorad_r = (al_fixed)1608;
  ```

## DESCRIPTION

This constant gives a ratio which can be used to convert a fixed point number in binary angle format to a fixed point number in radians.

Example:

-

  ```
  al_fixed rad_angle, binary_angle;
  /* Set the binary angle to 90 degrees. */
  binary_angle = 64;
  /* Now convert to radians (about 1.57). */
  rad_angle = al_fixmul(binary_angle, al_fixtorad_r);
  ```

## SEE ALSO

[al\_fixmul(3)](/al_fixmul/3.md), [al\_radtofix\_r(3)](/al_radtofix_r/3.md).