optimization cc.pGetAngle()

quick/cocos/cocos2d/Cocos2d.lua

@@ -74,14 +74,7 @@ function cc.pToAngleSelf(self)
 end
 
 function cc.pGetAngle(self,other)
-    local a2 = cc.pNormalize(self)
-    local b2 = cc.pNormalize(other)
-    local angle = math.atan2(cc.pCross(a2, b2), cc.pDot(a2, b2) )
-    if math.abs(angle) < 1.192092896e-7 then
-        return 0.0
-    end
-
-    return angle
+    return math.atan2(other.y - self.y, other.x - self.x)
 end
 
 function cc.pGetDistance(startP,endP)