重新定义2维向量的大小比较操作符，暂时去掉3维和4纬向量的比较操作符

source/core/include/math/dvc_vector2.h

@@ -59,6 +59,18 @@ public:
 		return (x != rkVector.x || y != rkVector.y);
 	}
 
+	inline bool operator > (const TVector2& rkVector) const {
+		if (y > rkVector.y) return true;
+		else if (y < rkVector.y) return false;
+		else return x > rkVector.x;
+	}
+
+	inline bool operator < (const TVector2& rkVector) const {
+		if (y < rkVector.y) return true;
+		else if (y > rkVector.y) return false;
+		else return x < rkVector.x;
+	}
+
 public:
 	// Arithmetic operations
 	inline TVector2 operator + (const TVector2& rkVector) const {
@@ -172,14 +184,6 @@ public:
 		return *this;
 	}
 
-	inline bool operator < (const TVector2& rhs) const {
-		return (x < rhs.x && y < rhs.y);
-	}
-
-	inline bool operator > (const TVector2& rhs) const {
-		return (x > rhs.x && y > rhs.y);
-	}
-
 public:
 	inline T length(void) const {
 		return MathUtil::sqrt(x * x + y * y);

source/core/include/math/dvc_vector3.h

@@ -194,14 +194,6 @@ public:
 		return *this;
 	}
 
-	inline bool operator < (const TVector3& rhs) const {
-		return (x < rhs.x && y < rhs.y && z < rhs.z);
-	}
-
-	inline bool operator > (const TVector3& rhs) const {
-		return (x > rhs.x && y > rhs.y && z > rhs.z);
-	}
-
 public:
 	inline T length(void) const {
 		return MathUtil::sqrt(x * x + y * y + z * z);

source/core/include/math/dvc_vector4.h

@@ -210,14 +210,6 @@ public:
 		return *this;
 	}
 
-	inline bool operator < (const TVector4& rhs) const {
-		return (x < rhs.x && y < rhs.y && z < rhs.z && w < rhs.w);
-	}
-
-	inline bool operator > (const TVector4& rhs) const {
-		return (x > rhs.x && y > rhs.y && z > rhs.z && w > rhs.w);
-	}
-
 public:
 
 	inline T dotProduct(const TVector4& vec) const {