From 6a9272d3af202274dfbced245f0ba20b263fcd8b Mon Sep 17 00:00:00 2001
From: a1xd <68629610+a1xd@users.noreply.github.com>
Date: Fri, 3 Sep 2021 18:09:00 -0400
Subject: refactor vec2/math

---
 common/math-vec2.hpp | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 common/math-vec2.hpp

(limited to 'common/math-vec2.hpp')

diff --git a/common/math-vec2.hpp b/common/math-vec2.hpp
new file mode 100644
index 0000000..2622926
--- /dev/null
+++ b/common/math-vec2.hpp
@@ -0,0 +1,36 @@
+#pragma once
+
+#define _USE_MATH_DEFINES
+#include <math.h>
+
+template <typename T>
+struct vec2 {
+    T x;
+    T y;
+};
+
+using vec2d = vec2<double>;
+
+inline vec2d direction(double degrees)
+{
+    double radians = degrees * M_PI / 180;
+    return { cos(radians), sin(radians) };
+}
+
+constexpr vec2d rotate(const vec2d& v, const vec2d& direction)
+{
+    return {
+        v.x * direction.x - v.y * direction.y,
+        v.x * direction.y + v.y * direction.x
+    };
+}
+
+inline double magnitude(const vec2d& v)
+{
+    return sqrt(v.x * v.x + v.y * v.y);
+}
+
+inline double lp_distance(const vec2d& v, double p)
+{
+    return pow(pow(v.x, p) + pow(v.y, p), 1 / p);
+}
-- 
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