1 files changed, 14 insertions, 0 deletions
diff --git a/frontend/_rigidbody/vec2.js b/frontend/_rigidbody/vec2.js
index 3b24371..2db42e0 100644
--- a/frontend/_rigidbody/vec2.js
+++ b/frontend/_rigidbody/vec2.js
@@ -38,4 +38,18 @@ function normalize2(v) {
 
 function vec2str(v) {
     return `(${v.x.toFixed(2)}, ${v.y.toFixed(2)})`;
+}
+
+function getPerp2(v) {
+    return {
+        x: -v.y,
+        y: v.x
+    };
+}
+
+function negate2(v) {
+    return {
+        x: -v.x,
+        y: -v.y
+    };
 }
 \ No newline at end of file