refactor normalize in Vector4

cocos/deprecated/CCDeprecated.cpp

@@ -534,7 +534,7 @@ Vector4* kmVec4Lerp(Vector4* pOut, const Vector4* pV1, const Vector4* pV2, float
 
 Vector4* kmVec4Normalize(Vector4* pOut, const Vector4* pIn)
 {
-    pIn->normalize(pOut);
+    *pOut = pIn->getNormalize();
     return pOut;
 }
 

cocos/math/Vector4.cpp

@@ -233,39 +233,30 @@ void Vector4::negate()
     w = -w;
 }
 
-Vector4& Vector4::normalize()
+void Vector4::normalize()
 {
-    normalize(this);
-    return *this;
-}
-
-void Vector4::normalize(Vector4* dst) const
-{
-    GP_ASSERT(dst);
-
-    if (dst != this)
-    {
-        dst->x = x;
-        dst->y = y;
-        dst->z = z;
-        dst->w = w;
-    }
-
     float n = x * x + y * y + z * z + w * w;
     // Already normalized.
     if (n == 1.0f)
         return;
-
+    
     n = sqrt(n);
     // Too close to zero.
     if (n < MATH_TOLERANCE)
         return;
-
+    
     n = 1.0f / n;
-    dst->x *= n;
-    dst->y *= n;
-    dst->z *= n;
-    dst->w *= n;
+    x *= n;
+    y *= n;
+    z *= n;
+    w *= n;
+}
+
+Vector4 Vector4::getNormalize() const
+{
+    Vector4 v(*this);
+    v.normalize();
+    return v;
 }
 
 void Vector4::scale(float scalar)

cocos/math/Vector4.h

@@ -273,7 +273,7 @@ public:
      * 
      * @return This vector, after the normalization occurs.
      */
-    Vector4& normalize();
+    void normalize();
 
     /**
      * Normalizes this vector and stores the result in dst.
@@ -284,7 +284,7 @@ public:
      *
      * @param dst The destination vector.
      */
-    void normalize(Vector4* dst) const;
+    Vector4 getNormalize() const;
 
     /**
      * Scales all elements of this vector by the specified value.