From 527804e49cda9a546760c7caafdfb3aecc59edea Mon Sep 17 00:00:00 2001
From: Virt <41426325+VirtCode@users.noreply.github.com>
Date: Wed, 10 Jul 2024 15:16:17 +0200
Subject: [PATCH] fix: div by zero on rotate if cursor starts at 0;0

when the plugin is loaded whilst the cursor pos is at 0;0, the `end`
vector is being normalized allthough it will contain 0;0. this will
produce a division by zero, causing the rotation to be set to NaN,
ultimately causing the cursor not to render because of a NaN'd
projection matrix

thanks for reporting and testing @RGBCube
---
 src/mode/ModeRotate.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mode/ModeRotate.cpp b/src/mode/ModeRotate.cpp
index 90c2b31..fc26983 100644
--- a/src/mode/ModeRotate.cpp
+++ b/src/mode/ModeRotate.cpp
@@ -19,6 +19,8 @@ SModeResult CModeRotate::update(Vector2D pos) {
 
     // normalize
     double size = end.size();
+    if (size == 0) size = 1; // do not divide by 0
+
     end.x /= size;
     end.y /= size;