From 6ec259a0e71174651bae95d4628138bf6fd68742 Mon Sep 17 00:00:00 2001
From: kj_sh604
Date: Sun, 15 Mar 2026 16:19:35 -0400
Subject: refactor: packages/

---
 packages/excalidraw/gesture.ts | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 packages/excalidraw/gesture.ts

(limited to 'packages/excalidraw/gesture.ts')

diff --git a/packages/excalidraw/gesture.ts b/packages/excalidraw/gesture.ts
new file mode 100644
index 0000000..8ffa6d2
--- /dev/null
+++ b/packages/excalidraw/gesture.ts
@@ -0,0 +1,15 @@
+import type { PointerCoords } from "./types";
+
+export const getCenter = (pointers: Map<number, PointerCoords>) => {
+  const allCoords = Array.from(pointers.values());
+  return {
+    x: sum(allCoords, (coords) => coords.x) / allCoords.length,
+    y: sum(allCoords, (coords) => coords.y) / allCoords.length,
+  };
+};
+
+export const getDistance = ([a, b]: readonly PointerCoords[]) =>
+  Math.hypot(a.x - b.x, a.y - b.y);
+
+const sum = <T>(array: readonly T[], mapper: (item: T) => number): number =>
+  array.reduce((acc, item) => acc + mapper(item), 0);
-- 
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