Merge branch 'intolerantape-Vector-Angle-Functions-CPP'

Source/Engine/Core/Math/Vector2.h

@@ -614,6 +614,20 @@ public:
     /// <param name="v2">The third triangle vertex.</param>
     /// <returns>The triangle area.</returns>
     static float TriangleArea(const Vector2& v0, const Vector2& v1, const Vector2& v2);
+	
+	/// <summary>
+    /// Calculates the angle (in radians) between from and to. This is always the smallest value.
+    /// </summary>
+    /// <param name="from">The first vector.</param>
+    /// <param name="to">The second vector.</param>
+    /// <returns>The angle (in radians).</returns>
+    static float Angle(const Vector2& from, const Vector2& to)
+    {
+        const float dot = Math::Clamp(Dot(Normalize(from), Normalize(to)), -1.0f, 1.0f);
+        if (Math::Abs(dot) > (1.0f - ZeroTolerance))
+            return dot > 0.0f ? 0.0f : PI;
+        return Math::Acos(dot);
+    }
 };
 
 inline Vector2 operator+(float a, const Vector2& b)

Source/Engine/Core/Math/Vector3.h

@@ -929,6 +929,19 @@ public:
     /// <returns>The triangle area.</returns>
     static float TriangleArea(const Vector3& v0, const Vector3& v1, const Vector3& v2);
 
+    /// <summary>
+    /// Calculates the angle (in radians) between from and to. This is always the smallest value.
+    /// </summary>
+    /// <param name="from">The first vector.</param>
+    /// <param name="to">The second vector.</param>
+    /// <returns>The angle (in radians).</returns>
+    static float Angle(const Vector3& from, const Vector3& to)
+    {
+        const float dot = Math::Clamp(Dot(Normalize(from), Normalize(to)), -1.0f, 1.0f);
+        if (Math::Abs(dot) > (1.0f - ZeroTolerance))
+            return dot > 0.0f ? 0.0f : PI;
+        return Math::Acos(dot);
+    }
 };
 
 inline Vector3 operator+(float a, const Vector3& b)