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 {

test/unit/dvt_unit_vector2.cpp

@@ -75,6 +75,36 @@ TEST(Math_Vector2, Basic)
 		EXPECT_TRUE(v1 != v2);
 	}
 
+	{
+		fVector2 v1(TWO_RANDOM_FLOAT), v2(v1);
+
+		EXPECT_FALSE(v2 > v1);
+		EXPECT_FALSE(v1 > v2);
+		EXPECT_FALSE(v2 < v1);
+		EXPECT_FALSE(v1 < v2);
+
+		v2.y += 1.f;
+		EXPECT_GT(v2, v1);
+		EXPECT_LT(v1, v2);
+
+		v2 = v1;
+		v2.x += 1.f;
+		EXPECT_GT(v2, v1);
+		EXPECT_LT(v1, v2);
+
+		v2 = v1;
+		v2.x += 1.f;
+		v2.y += 1.f;
+		EXPECT_GT(v2, v1);
+		EXPECT_LT(v1, v2);
+
+		v2 = v1;
+		v2.x += 1.f;
+		v2.y -= 1.f;
+		EXPECT_LT(v2, v1);
+		EXPECT_GT(v1, v2);
+	}
+
 	{
 		float a = 0.f;
 		while (a == 0.f) { a = _randomFloat(); }
@@ -190,16 +220,6 @@ TEST(Math_Vector2, Basic)
 		v3 /= a;
 		EXPECT_TRUE(v3 == v1 / a);
 	}
-
-	{
-		fVector2 v1(TWO_RANDOM_FLOAT), v2(v1);
-		
-		v2 += 1.f;
-		EXPECT_TRUE(v2 > v1);
-
-		v2 -= 2.f;
-		EXPECT_TRUE(v2 < v1);
-	}
 }
 
 //-------------------------------------------------------------------------------------

test/unit/dvt_unit_vector3.cpp

@@ -238,16 +238,6 @@ TEST(Math_Vector3, Basic)
 		v3 /= a;
 		EXPECT_TRUE(v3 == v1 / a);
 	}
-
-	{
-		fVector3 v1(THREE_RANDOM_FLOAT), v2(v1);
-
-		v2 += 1.f;
-		EXPECT_TRUE(v2 > v1);
-
-		v2 -= 2.f;
-		EXPECT_TRUE(v2 < v1);
-	}
 }
 
 //-------------------------------------------------------------------------------------

test/unit/dvt_unit_vector4.cpp

@@ -234,16 +234,6 @@ TEST(Math_Vector4, Basic)
 		v3 /= a;
 		EXPECT_TRUE(v3 == v1 / a);
 	}
-
-	{
-		fVector4 v1(FOUR_RANDOM_FLOAT), v2(v1);
-
-		v2 += 1.f;
-		EXPECT_TRUE(v2 > v1);
-
-		v2 -= 2.f;
-		EXPECT_TRUE(v2 < v1);
-	}
 }