---
name: "al_invert_transform"
section: "3alleg5"
platform: "linux"
package: "allegro5-doc"
version: "2:5.2.10.1+dfsg-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/al_invert_transform/3alleg5"
---

# al\_invert\_transform(3alleg5)

Allegro 5 API

## NAME

al\_invert\_transform - Allegro 5 API

## SYNOPSIS

-

  ```
  #include <allegro5/allegro.h>
  void al_invert_transform(ALLEGRO_TRANSFORM *trans)
  ```

## DESCRIPTION

Inverts the passed transformation. If the transformation is nearly singular (close to not having an inverse) then the returned transformation may be invalid. Use al\_check\_inverse(3alleg5) to ascertain if the transformation has an inverse before inverting it if you are in doubt.

*Parameters:*

- •

  trans - Transformation to invert

  *Note*: Allegro’s transformation inversion functions work correctly only with 2D transformations.

## SEE ALSO

al\_check\_inverse(3alleg5)