From 535b5aa01f029315bc34b6ad89cebe1523b649af Mon Sep 17 00:00:00 2001
From: Vyacheslav Zeronov <zeronsix@gmail.com>
Date: Fri, 8 Aug 2014 13:46:25 +0600
Subject: [PATCH] Added Matrix3::from_diagonal

Useful for creation of scale matrices.
---
 src/matrix.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/matrix.rs b/src/matrix.rs
index ab07af3..d6a3c20 100644
--- a/src/matrix.rs
+++ b/src/matrix.rs
@@ -208,6 +208,13 @@ Matrix3<S> {
                      _1subc * axis.y * axis.z - s * axis.x,
                      _1subc * axis.z * axis.z + c)
     }
+
+    /// Create a matrix from a non-uniform scale 
+    pub fn from_diagonal(value: &Vector3<S>) -> Matrix3<S> {
+        Matrix3::new(value.x, zero(),  zero(),
+                     zero(),  value.y, zero(),
+                     zero(),  zero(),  value.z)
+    }
 }
 
 impl<S: BaseNum> Matrix4<S> {