diff --git a/cocos/2d/CCSprite.cpp b/cocos/2d/CCSprite.cpp
index 181a60b0ca..7357db7f7f 100644
--- a/cocos/2d/CCSprite.cpp
+++ b/cocos/2d/CCSprite.cpp
@@ -617,25 +617,30 @@ void Sprite::draw(void)
 // Culling function from cocos2d-iphone CCSprite.m file
 bool Sprite::culling() const
 {
-    Size s = Director::getInstance()->getWinSize();
-    float hcsx = _contentSize.width * 0.5f;
-    float hcsy = _contentSize.height * 0.5f;
+    // half size of the screen
+    Size screen_half = Director::getInstance()->getWinSize();
+    screen_half.width /= 2;
+    screen_half.height /= 2;
+
+    float hcsx = _contentSize.width / 2;
+    float hcsy = _contentSize.height / 2;
 
     // convert to world coordinates
     float x = hcsx * _modelViewTransform.mat[0] + hcsy * _modelViewTransform.mat[4] + _modelViewTransform.mat[12];
     float y = hcsx * _modelViewTransform.mat[1] + hcsy * _modelViewTransform.mat[5] + _modelViewTransform.mat[13];
 
     // center of screen is (0,0)
-    x -= s.width/2;
-    y -= s.height/2;
+    x -= screen_half.width;
+    y -= screen_half.height;
 
     // convert content size to world coordinates
     float wchw = hcsx * fmaxf(fabsf(_modelViewTransform.mat[0] + _modelViewTransform.mat[4]), fabsf(_modelViewTransform.mat[0] - _modelViewTransform.mat[4]));
     float wchh = hcsy * fmaxf(fabsf(_modelViewTransform.mat[1] + _modelViewTransform.mat[5]), fabsf(_modelViewTransform.mat[1] - _modelViewTransform.mat[5]));
 
+    // compare if it in the positive quarter of the screen
     float tmpx = (fabsf(x)-wchw);
     float tmpy = (fabsf(y)-wchh);
-    return (tmpx < s.width/2 && tmpy < s.height/2);
+    return (tmpx < screen_half.width && tmpy < screen_half.height);
 }
 
 // Node overrides