---
name: "fixtorad_r"
section: "3alleg"
platform: "linux"
package: "liballegro-doc"
version: "2:4.2.2-2.2"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/fixtorad_r"
---

# fixtorad\_r(3alleg)

Constant to convert angles in fixed point format to radians. Allegro game programming library.

## NAME

fixtorad\_r - Constant to convert angles in fixed point format to radians. Allegro game programming library.

## SYNOPSIS

**#include \<allegro.h\>**

**extern const fixed fixtorad\_r;**

## 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:

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

## SEE ALSO

[**fixmul**(3alleg)](/fixmul/3alleg.md), [**radtofix\_r**(3alleg)](/radtofix_r/3alleg.md)