From 85bedf77013717a56c2f189dfd725cb7a797932f Mon Sep 17 00:00:00 2001
From: Andrea Gargaro <andreagargaro_ca@hotmail.com>
Date: Thu, 2 Mar 2023 15:09:57 +0100
Subject: [PATCH] Trackball zoom limit

---
 examples/jsm/controls/TrackballControls.js | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/examples/jsm/controls/TrackballControls.js b/examples/jsm/controls/TrackballControls.js
index 77ef51c48e03ee..038b0c93d3975f 100644
--- a/examples/jsm/controls/TrackballControls.js
+++ b/examples/jsm/controls/TrackballControls.js
@@ -1,5 +1,6 @@
 import {
 	EventDispatcher,
+	MathUtils,
 	MOUSE,
 	Quaternion,
 	Vector2,
@@ -205,8 +206,13 @@ class TrackballControls extends EventDispatcher {
 
 				} else if ( scope.object.isOrthographicCamera ) {
 
-					scope.object.zoom /= factor;
-					scope.object.updateProjectionMatrix();
+						scope.object.zoom = MathUtils.clamp(scope.object.zoom / factor, scope.minDistance, scope.maxDistance);
+						
+						if (lastZoom != scope.object.zoom) {
+
+							scope.object.updateProjectionMatrix();
+							
+						}
 
 				} else {
 
@@ -226,8 +232,13 @@ class TrackballControls extends EventDispatcher {
 
 					} else if ( scope.object.isOrthographicCamera ) {
 
-						scope.object.zoom /= factor;
-						scope.object.updateProjectionMatrix();
+						scope.object.zoom = MathUtils.clamp(scope.object.zoom / factor, scope.minDistance, scope.maxDistance);
+						
+						if (lastZoom != scope.object.zoom) {
+
+							scope.object.updateProjectionMatrix();
+							
+						}
 
 					} else {