From 4b86ec3eaa5a201abfe782dba1109d720d7399a2 Mon Sep 17 00:00:00 2001
From: Lorenzo <lol.9@libero.it>
Date: Wed, 15 Apr 2020 20:59:35 +0200
Subject: [PATCH] test multi touch

---
 public/js/whiteboard.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/public/js/whiteboard.js b/public/js/whiteboard.js
index 4a2fe50..d324a58 100644
--- a/public/js/whiteboard.js
+++ b/public/js/whiteboard.js
@@ -87,6 +87,10 @@ var whiteboard = {
                 return;
             }
 
+            if(e.touches.length > 1) {
+                return; // if more than one fingers are touching the screen, dont draw
+            }
+
             _this.drawFlag = true;
             _this.prevX = (e.offsetX || e.pageX - $(e.target).offset().left) + 1;
             _this.prevY = (e.offsetY || e.pageY - $(e.target).offset().top) + 1;