added vector2d

src/helpers/Vector2D.cpp

@@ -0,0 +1,19 @@
+#include "Vector2D.hpp"
+
+Vector2D::Vector2D(double xx, double yy) {
+    x = xx;
+    y = yy;
+}
+
+Vector2D::Vector2D() { x = 0; y = 0; }
+Vector2D::~Vector2D() {}
+
+double Vector2D::normalize() {
+    // get max abs
+    const auto max = abs(x) > abs(y) ? abs(x) : abs(y);
+
+    x /= max;
+    y /= max;
+
+    return max;
+}