From 3fa9cf2c94081f5d7b71d6339b2c2348de42886c Mon Sep 17 00:00:00 2001
From: Brandon Dyck <brandon@dyck.us>
Date: Sun, 23 Oct 2022 22:40:08 -0600
Subject: [PATCH] Clamp x-axis rotation

---
 panorama-viewer.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/panorama-viewer.js b/panorama-viewer.js
index e29f506..458abcc 100644
--- a/panorama-viewer.js
+++ b/panorama-viewer.js
@@ -159,6 +159,11 @@
 				case "mousemove":
 					θy += event.movementX * 0.005;
 					θx += event.movementY * 0.005;
+					if (θx < -Math.PI / 2) {
+						θx = -Math.PI / 2;
+					} else if (θx > Math.PI / 2) {
+						θx = Math.PI / 2;
+					}
 					break
 			}
 			return PanState.panning;