From 376e1a7f9207fffb1ec3027ac1e7f32db5de4922 Mon Sep 17 00:00:00 2001
From: Matthew Kosarek <mattkae@protonmail.com>
Date: Sat, 6 Feb 2021 18:39:48 -0500
Subject: Initial commit

---
 frontend/_rigidbody/vec2.js | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 frontend/_rigidbody/vec2.js

(limited to 'frontend/_rigidbody/vec2.js')

diff --git a/frontend/_rigidbody/vec2.js b/frontend/_rigidbody/vec2.js
new file mode 100644
index 0000000..3b24371
--- /dev/null
+++ b/frontend/_rigidbody/vec2.js
@@ -0,0 +1,41 @@
+function vec2(x = 0, y = 0) {
+    return { x: x, y: y};
+}
+
+function addVec2(v1, v2) {
+    return {
+        x: v1.x + v2.x,
+        y: v1.y + v2.y
+    };
+}
+
+function subVec2(v1, v2) {
+    return {
+        x: v1.x - v2.x,
+        y: v1.y - v2.y
+    };
+}
+
+function scaleVec2(v, s) {
+    return {
+        x: v.x * s,
+        y: v.y * s
+    };
+}
+
+function dot2(v1, v2) {
+    return v1.x * v2.x + v1.y * v2.y;
+}
+
+function length2(v) {
+    return Math.sqrt(v.x * v.x + v.y * v.y);
+}
+
+function normalize2(v) {
+    const lLength = 1.0 / length2(v);
+    return { x: v.x * lLength, y: v.y * lLength };
+}
+
+function vec2str(v) {
+    return `(${v.x.toFixed(2)}, ${v.y.toFixed(2)})`;
+}
\ No newline at end of file
-- 
cgit v1.2.1