From b0f418c481af8ce20ddde19a429413e7605052de Mon Sep 17 00:00:00 2001
From: Lynix <lynix680@gmail.com>
Date: Tue, 26 May 2015 23:38:06 +0200
Subject: [PATCH] Math/Matrix4: Add GetSquaredScale() method

Former-commit-id: c1ce74560b735dbcd5a4c377a7577a9d2c1bae09
---
 include/Nazara/Math/Matrix4.hpp |  1 +
 include/Nazara/Math/Matrix4.inl | 13 ++++++++++---
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/include/Nazara/Math/Matrix4.hpp b/include/Nazara/Math/Matrix4.hpp
index ac142f4f1..3e97846b6 100644
--- a/include/Nazara/Math/Matrix4.hpp
+++ b/include/Nazara/Math/Matrix4.hpp
@@ -49,6 +49,7 @@ class NzMatrix4
 		//NzMatrix3 GetRotationMatrix() const;
 		NzVector4<T> GetRow(unsigned int row) const;
 		NzVector3<T> GetScale() const;
+		NzVector3<T> GetSquaredScale() const;
 		NzVector3<T> GetTranslation() const;
 		void GetTransposed(NzMatrix4* dest) const;
 
diff --git a/include/Nazara/Math/Matrix4.inl b/include/Nazara/Math/Matrix4.inl
index e3d172c32..694ef446a 100644
--- a/include/Nazara/Math/Matrix4.inl
+++ b/include/Nazara/Math/Matrix4.inl
@@ -485,9 +485,16 @@ NzVector4<T> NzMatrix4<T>::GetRow(unsigned int row) const
 template<typename T>
 NzVector3<T> NzMatrix4<T>::GetScale() const
 {
-	return NzVector3<T>(std::sqrt(m11*m11 + m21*m21 + m31*m31),
-						std::sqrt(m12*m12 + m22*m22 + m32*m32),
-						std::sqrt(m13*m13 + m23*m23 + m33*m33));
+	NzVector3<T> squaredScale = GetSquaredScale();
+	return NzVector3<T>(std::sqrt(squaredScale.x), std::sqrt(squaredScale.y), std::sqrt(squaredScale.z));
+}
+
+template<typename T>
+NzVector3<T> NzMatrix4<T>::GetSquaredScale() const
+{
+	return NzVector3<T>(m11*m11 + m21*m21 + m31*m31,
+	                    m12*m12 + m22*m22 + m32*m32,
+	                    m13*m13 + m23*m23 + m33*m33);
 }
 
 template<typename T>