Add Int3.cpp.

Source/Engine/Core/Math/Int3.cpp

@@ -0,0 +1,56 @@
+// Copyright (c) 2012-2021 Wojciech Figat. All rights reserved.
+
+#include "Int2.h"
+#include "Int3.h"
+#include "Int4.h"
+#include "Vector2.h"
+#include "Vector3.h"
+#include "Vector4.h"
+#include "Engine/Core/Types/String.h"
+
+static_assert(sizeof(Int3) == 12, "Invalid Int3 type size.");
+
+const Int3 Int3::Zero(0);
+const Int3 Int3::One(1);
+const Int3 Int3::Minimum(MIN_int32);
+const Int3 Int3::Maximum(MAX_int32);
+
+Int3::Int3(const Int2& xy, int32 z)
+    : X(xy.X)
+    , Y(xy.Y)
+    , Z(z)
+{
+}
+
+Int3::Int3(const Int4& xyzw)
+    : X(xyzw.X)
+    , Y(xyzw.Y)
+    , Z(xyzw.Z)
+{
+}
+
+Int3::Int3(const Vector2& xy, int32 z)
+    : X(static_cast<int32>(xy.X))
+    , Y(static_cast<int32>(xy.Y))
+    , Z(z)
+{
+}
+
+Int3::Int3(const Vector3& xyz)
+    : X(static_cast<int32>(xyz.X))
+    , Y(static_cast<int32>(xyz.Y))
+    , Z(static_cast<int32>(xyz.Z))
+{
+}
+
+Int3::Int3(const Vector4& xyzw)
+    : X(static_cast<int32>(xyzw.X))
+    , Y(static_cast<int32>(xyzw.Y))
+    , Z(static_cast<int32>(xyzw.Z))
+{
+}
+
+String Int3::ToString() const
+{
+    return String::Format(TEXT("{}"), *this);
+}