From e1c3732c51f9099bed10d36805b738015adc8f47 Mon Sep 17 00:00:00 2001
From: Pavel Rojtberg <rojtberg@gmail.com>
Date: Fri, 11 Jan 2019 02:50:43 +0100
Subject: [PATCH] Main: Quaternion - inline several trivial member functions

---
 OgreMain/include/OgreQuaternion.h | 37 ++++++++++++++++++++-------
 OgreMain/src/OgreQuaternion.cpp   | 42 -------------------------------
 2 files changed, 28 insertions(+), 51 deletions(-)

diff --git a/OgreMain/include/OgreQuaternion.h b/OgreMain/include/OgreQuaternion.h
index ec9ac89f0af..136b72f22e4 100644
--- a/OgreMain/include/OgreQuaternion.h
+++ b/OgreMain/include/OgreQuaternion.h
@@ -178,11 +178,16 @@ namespace Ogre {
         }
         Quaternion operator+ (const Quaternion& rkQ) const;
         Quaternion operator- (const Quaternion& rkQ) const;
-        Quaternion operator* (const Quaternion& rkQ) const;
-        Quaternion operator* (Real fScalar) const;
-        _OgreExport friend Quaternion operator* (Real fScalar,
-            const Quaternion& rkQ);
-        Quaternion operator- () const;
+        Quaternion operator*(const Quaternion& rkQ) const;
+        Quaternion operator*(Real s) const
+        {
+            return Quaternion(s * w, s * x, s * y, s * z);
+        }
+        _OgreExport friend Quaternion operator*(Real s, const Quaternion& q)
+        {
+            return q * s;
+        }
+        Quaternion operator-() const { return Quaternion(-w, -x, -y, -z); }
         inline bool operator== (const Quaternion& rhs) const
         {
             return (rhs.x == x) && (rhs.y == y) &&
@@ -194,11 +199,19 @@ namespace Ogre {
         }
         // functions of a quaternion
         /// Returns the dot product of the quaternion
-        Real Dot (const Quaternion& rkQ) const;
+        Real Dot(const Quaternion& rkQ) const
+        {
+            return w * rkQ.w + x * rkQ.x + y * rkQ.y + z * rkQ.z;
+        }
         /// Returns the normal length of this quaternion.
-        Real Norm () const;
+        Real Norm() const { return Math::Sqrt(w * w + x * x + y * y + z * z); }
         /// Normalises this quaternion, and returns the previous length
-        Real normalise(void); 
+        Real normalise(void)
+        {
+            Real len = Norm();
+            *this = 1.0f / len * *this;
+            return len;
+        }
         Quaternion Inverse () const;  /// Apply to non-zero quaternion
         Quaternion UnitInverse () const;  /// Apply to unit-length quaternion
         Quaternion Exp () const;
@@ -245,7 +258,13 @@ namespace Ogre {
         @remark Both equals() and orientationEquals() measure the exact same thing.
                 One measures the difference by angle, the other by a different, non-linear metric.
         */
-        bool equals(const Quaternion& rhs, const Radian& tolerance) const;
+        bool equals(const Quaternion& rhs, const Radian& tolerance) const
+        {
+            Real d = Dot(rhs);
+            Radian angle = Math::ACos(2.0f * d*d - 1.0f);
+
+            return Math::Abs(angle.valueRadians()) <= tolerance.valueRadians();
+        }
         
         /** Compare two quaternions which are assumed to be used as orientations.
         @remark Both equals() and orientationEquals() measure the exact same thing.
diff --git a/OgreMain/src/OgreQuaternion.cpp b/OgreMain/src/OgreQuaternion.cpp
index b8dc4d820a6..9682ab66733 100644
--- a/OgreMain/src/OgreQuaternion.cpp
+++ b/OgreMain/src/OgreQuaternion.cpp
@@ -271,32 +271,6 @@ namespace Ogre {
         );
     }
     //-----------------------------------------------------------------------
-    Quaternion Quaternion::operator* (Real fScalar) const
-    {
-        return Quaternion(fScalar*w,fScalar*x,fScalar*y,fScalar*z);
-    }
-    //-----------------------------------------------------------------------
-    Quaternion operator* (Real fScalar, const Quaternion& rkQ)
-    {
-        return Quaternion(fScalar*rkQ.w,fScalar*rkQ.x,fScalar*rkQ.y,
-            fScalar*rkQ.z);
-    }
-    //-----------------------------------------------------------------------
-    Quaternion Quaternion::operator- () const
-    {
-        return Quaternion(-w,-x,-y,-z);
-    }
-    //-----------------------------------------------------------------------
-    Real Quaternion::Dot (const Quaternion& rkQ) const
-    {
-        return w*rkQ.w+x*rkQ.x+y*rkQ.y+z*rkQ.z;
-    }
-    //-----------------------------------------------------------------------
-    Real Quaternion::Norm () const
-    {
-        return Math::Sqrt(w * w + x * x + y * y + z * z);
-    }
-    //-----------------------------------------------------------------------
     Quaternion Quaternion::Inverse () const
     {
         Real fNorm = w*w+x*x+y*y+z*z;
@@ -395,14 +369,6 @@ namespace Ogre {
 		return v + uv + uuv;
 
     }
-    //-----------------------------------------------------------------------
-	bool Quaternion::equals(const Quaternion& rhs, const Radian& tolerance) const
-	{
-        Real d = Dot(rhs);
-        Radian angle = Math::ACos(2.0f * d*d - 1.0f);
-
-		return Math::Abs(angle.valueRadians()) <= tolerance.valueRadians();
-	}
     //-----------------------------------------------------------------------
     Quaternion Quaternion::Slerp (Real fT, const Quaternion& rkP,
         const Quaternion& rkQ, bool shortestPath)
@@ -489,14 +455,6 @@ namespace Ogre {
         Quaternion kSlerpQ = Slerp(fT, rkA, rkB);
         return Slerp(fSlerpT, kSlerpP ,kSlerpQ);
     }
-    //-----------------------------------------------------------------------
-    Real Quaternion::normalise(void)
-    {
-        Real len = Norm();
-        Real factor = 1.0f / len;
-        *this = *this * factor;
-        return len;
-    }
     //-----------------------------------------------------------------------
 	Radian Quaternion::getRoll(bool reprojectAxis) const
 	{