From f0824fdebc79fbf3843c2053522107c33e3ce2a3 Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Mon, 7 Mar 2022 20:20:18 +0100
Subject: refactor: move directions to vector2 & make vector2 hashable

---
 src/engine/data/vector2.cpp | 37 +++++++++++++++++++++++++++++++++++++
 src/engine/data/vector2.hpp | 29 +++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+)

(limited to 'src/engine/data')

diff --git a/src/engine/data/vector2.cpp b/src/engine/data/vector2.cpp
index 6dcd7d6..c182fba 100644
--- a/src/engine/data/vector2.cpp
+++ b/src/engine/data/vector2.cpp
@@ -1,5 +1,7 @@
 #include "vector2.hpp"
 
+#include "util/hash.hpp"
+
 Vector2::Vector2(const Vector2Options &options) : _x(options.x), _y(options.y) {}
 
 int32_t Vector2::get_x() const noexcept
@@ -37,3 +39,38 @@ const Vector2 &Vector2::operator-=(const Vector2 &vector2) noexcept
 
 	return *this;
 }
+
+bool Vector2::operator==(const Vector2 &vector2) const noexcept
+{
+	return _x == vector2._x && _y == vector2._y;
+}
+
+Vector2 Vector2::up()
+{
+	return Vector2({.x = 0, .y = 1});
+}
+
+Vector2 Vector2::down()
+{
+	return Vector2({.x = 0, .y = -1});
+}
+
+Vector2 Vector2::left()
+{
+	return Vector2({.x = -1, .y = 0});
+}
+
+Vector2 Vector2::right()
+{
+	return Vector2({.x = 1, .y = 0});
+}
+
+std::size_t Vector2Hasher::operator()(const Vector2 &vector2) const
+{
+	std::size_t result_hash = 0;
+
+	hash_combine(result_hash, vector2.get_x());
+	hash_combine(result_hash, vector2.get_y());
+
+	return result_hash;
+}
diff --git a/src/engine/data/vector2.hpp b/src/engine/data/vector2.hpp
index acfe11f..dff548c 100644
--- a/src/engine/data/vector2.hpp
+++ b/src/engine/data/vector2.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cstdint>
+#include <functional>
 
 struct Vector2Options
 {
@@ -27,7 +28,35 @@ public:
 	const Vector2 &operator+=(const Vector2 &vector2) noexcept;
 	const Vector2 &operator-=(const Vector2 &vector2) noexcept;
 
+	bool operator==(const Vector2 &vector2) const noexcept;
+
+	/**
+	 *  Returns Vector2({.x = 0, .y = 1})
+	 */
+	static Vector2 up();
+
+	/**
+	 *  Returns Vector2({.x = 0, .y = -1})
+	 */
+	static Vector2 down();
+
+	/**
+	 *  Returns Vector2({.x = -1, .y = 0})
+	 */
+	static Vector2 left();
+
+	/**
+	 *  Returns Vector2({.x = 1, .y = 0})
+	 */
+	static Vector2 right();
+
 private:
 	int32_t _x;
 	int32_t _y;
 };
+
+class Vector2Hasher
+{
+public:
+	std::size_t operator()(const Vector2 &vector2) const;
+};
-- 
cgit v1.2.3-18-g5258