---
name: "qscale_matrix"
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/qscale_matrix/3alleg4"
---

# qscale\_matrix(3alleg4)

Optimised routine for scaling an already generated matrix. Allegro game programming library.

## NAME

qscale\_matrix, qscale\_matrix\_f - Optimised routine for scaling an already generated matrix. Allegro game programming library.

## SYNOPSIS

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

**void qscale\_matrix(MATRIX \*m, fixed scale);**

**void qscale\_matrix\_f(MATRIX\_f \*m, float scale);**

## DESCRIPTION

Optimised routine for scaling an already generated matrix: this simply  adds in the scale factor, so there is no need to build two temporary  matrices and then multiply them together.

## SEE ALSO

**get\_scaling\_matrix**(3alleg4)