---
name: "fixtorad_r"
section: "3alleg4"
platform: "linux"
package: "allegro4-doc"
version: "2:4.4.3.1-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/fixtorad_r/3alleg4"
---

# fixtorad\_r(3alleg4)

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**(3alleg4), **radtofix\_r**(3alleg4)