use vector for choose direction

Vector2D.cpp

@@ -0,0 +1,49 @@
+#include "Vector2D.h"
+
+Vector2D::Vector2D(Point point) {
+    point_.x = point.x;
+    point_.y = point.y;
+    lenght_ = sqrt(pow(point.x, 2) + pow(point.y, 2));
+    angle_ = atan2(point.y, point.x);
+}
+
+Vector2D::Vector2D(double lenght, double angle) {
+    lenght_ = lenght;
+    angle_ = angle;
+    point_.x = lenght * cos(angle);
+    point_.y = lenght * sin(angle);
+}
+
+Vector2D::Point Vector2D::CreatePoint(double x, double y) {
+    Point p;
+    p.x = x;
+    p.y = y;
+    return p;
+}
+
+void Vector2D::normalize(double max) {
+    lenght_ = (1/lenght_);
+    point_.x = lenght_ * cos(angle_);
+    point_.y = lenght_ * sin(angle_);
+}
+
+Vector2D Vector2D::reverse() {
+    Point p;
+    p.x = -point_.x;
+    p.y = -point_.y;
+    return Vector2D(p);
+}
+
+Vector2D Vector2D::operator +(Vector2D v) const {
+    Point p;
+    p.x = point_.x + v.x();
+    p.y = point_.y + v.y();
+    return Vector2D(p);
+}
+
+Vector2D Vector2D::operator -(Vector2D v) const {
+    Point p;
+    p.x = point_.x - v.x();
+    p.y = point_.y - v.y();
+    return Vector2D(p);
+}