OrbitControls: Added target distance check in change condition. (#26063)

examples/jsm/controls/OrbitControls.js

@@ -165,6 +165,7 @@ class OrbitControls extends EventDispatcher {
 
 			const lastPosition = new Vector3();
 			const lastQuaternion = new Quaternion();
+			const lastTargetPosition = new Vector3();
 
 			const twoPI = 2 * Math.PI;
 
@@ -278,12 +279,15 @@ class OrbitControls extends EventDispatcher {
 
 				if ( zoomChanged ||
 					lastPosition.distanceToSquared( scope.object.position ) > EPS ||
-					8 * ( 1 - lastQuaternion.dot( scope.object.quaternion ) ) > EPS ) {
+					8 * ( 1 - lastQuaternion.dot( scope.object.quaternion ) ) > EPS ||
+					lastTargetPosition.distanceToSquared( scope.target ) > 0 ) {
 
 					scope.dispatchEvent( _changeEvent );
 
 					lastPosition.copy( scope.object.position );
 					lastQuaternion.copy( scope.object.quaternion );
+					lastTargetPosition.copy( scope.target );
+
 					zoomChanged = false;
 
 					return true;