refactored drawing method

include/engine.hpp

@@ -7,17 +7,13 @@
 
 constexpr int ROW = 15;
 constexpr int COL = 31;
-constexpr int SIZE { 5 };
-
-enum class Direction {
-	NONE, UP, DOWN
-};
+constexpr int SIZE { 3 };
 
 struct vec2 {
-	int a, b;
-	vec2() : b(0), a(0) {};
-	vec2(int x, int y) : a(x), b(y) {};
-	void set(int a1, int b1) { a = a1; b = b1; };
+	int x, y;
+	vec2() : y(0), x(0) {};
+	vec2(int x, int y) : x(x), y(y) {};
+	void set(int a1, int b1) { x = a1; y = b1; };
 	auto operator <=> (const vec2&) const = default;
 };
 
@@ -25,14 +21,14 @@ struct Paddle {
 	Paddle(const vec2 init_pos);
 	std::array<vec2, SIZE> nodes;
 	const char symbol { '|' };
-	enum Direction dir = Direction::NONE;
+	enum class Dir { NONE, UP, DOWN } dir;
 	void move();
 };
 
 struct Window {
 	std::array<std::array<char, COL>, ROW> view = {};
 	void clear_display();
-	void draw_display();
+	void draw_display() const;
 	void update_display(const vec2 &ball, const Paddle &p1, const Paddle &p2);
 };
 
@@ -49,7 +45,7 @@ private:
 	vec2 ball { (COL / 2), (ROW / 2) };
 	vec2 ball_direction { 1, 1 };
 	Paddle p1 { { 1, (ROW / 2) - (SIZE / 2) } };
-	Paddle p2 { { COL - 2, (ROW / 2) - (SIZE / 2) } };
+	Paddle p2 { { COL - 2, (ROW / 2) - (SIZE / 2) - 1 } };
 	std::chrono::steady_clock::time_point last_clock_update;
 
 	bool exit_process();