diff --git a/cocos/base/CCDirector.cpp b/cocos/base/CCDirector.cpp
index 5ecc2ad8f6..f7df18644e 100644
--- a/cocos/base/CCDirector.cpp
+++ b/cocos/base/CCDirector.cpp
@@ -707,7 +707,7 @@ void Director::purgeCachedData(void)
 
 float Director::getZEye(void) const
 {
-    return (_winSizeInPoints.height / 1.1566f);
+    return (_winSizeInPoints.height / 1.154700538379252f);//(2 * tanf(M_PI/6))
 }
 
 void Director::setAlphaBlending(bool on)