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Source/Engine/Core/Math/Vector2.cpp

@@ -0,0 +1,74 @@
+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#include "Vector2.h"
+#include "Vector3.h"
+#include "Vector4.h"
+#include "Color.h"
+#include "../Types/String.h"
+#include "VectorInt.h"
+
+static_assert(sizeof(Vector2) == 8, "Invalid Vector2 type size.");
+
+const Vector2 Vector2::Zero(0);
+const Vector2 Vector2::One(1);
+const Vector2 Vector2::UnitX(1, 0);
+const Vector2 Vector2::UnitY(0, 1);
+const Vector2 Vector2::Minimum(MIN_float);
+const Vector2 Vector2::Maximum(MAX_float);
+
+Vector2::Vector2(const Int2& v)
+    : X((float)v.X)
+    , Y((float)v.Y)
+{
+}
+
+Vector2::Vector2(const Vector3& v)
+    : X(v.X)
+    , Y(v.Y)
+{
+}
+
+Vector2::Vector2(const Vector4& v)
+    : X(v.X)
+    , Y(v.Y)
+{
+}
+
+Vector2::Vector2(const Color& color)
+    : X(color.R)
+    , Y(color.G)
+{
+}
+
+String Vector2::ToString() const
+{
+    return String::Format(TEXT("{}"), *this);
+}
+
+Vector2 Vector2::Normalize(const Vector2& v)
+{
+    Vector2 result = v;
+    const float length = v.Length();
+    if (!Math::IsZero(length))
+    {
+        const float inv = 1.0f / length;
+        result.X *= inv;
+        result.Y *= inv;
+    }
+    return result;
+}
+
+Int2 Vector2::CeilToInt(const Vector2& v)
+{
+    return Int2(Math::CeilToInt(v.X), Math::CeilToInt(v.Y));
+}
+
+Int2 Vector2::FloorToInt(const Vector2& v)
+{
+    return Int2(Math::FloorToInt(v.X), Math::FloorToInt(v.Y));
+}
+
+float Vector2::TriangleArea(const Vector2& v0, const Vector2& v1, const Vector2& v2)
+{
+    return Math::Abs((v0.X * (v1.Y - v2.Y) + v1.X * (v2.Y - v0.Y) + v2.X * (v0.Y - v1.Y)) / 2);
+}