Merge pull request #6188 from barroij/fix_mesh_clone

Cloning a Mesh might throws an uncaught exception

dist/preview release/what's new.md

@@ -258,6 +258,7 @@
 - Auto Update Touch Action [#5674](https://github.com/BabylonJS/Babylon.js/issues/5674)([Sebavan](https://github.com/Sebavan))
 - Add hemispheric lighting to gizmos to avoid flat look ([TrevorDev](https://github.com/TrevorDev))
 - Fix a bug causing `WebRequest.open` to crash if `WebRequest.CustomRequestHeaders` are set [#6055](https://github.com/BabylonJS/Babylon.js/issues/6055)([susares](https://github.com/susares))
+- Fix a bug causing `Mesh.clone` to crash if no physicsEngineComponent is used  ([barroij](https://github.com/barroij))
 
 ### Viewer
 

src/Meshes/mesh.ts

@@ -400,11 +400,13 @@ export class Mesh extends AbstractMesh implements IGetSetVerticesData {
             }
 
             // Physics clone
-            var physicsEngine = this.getScene().getPhysicsEngine();
-            if (clonePhysicsImpostor && physicsEngine) {
-                var impostor = physicsEngine.getImpostorForPhysicsObject(source);
-                if (impostor) {
-                    this.physicsImpostor = impostor.clone(this);
+            if (scene.getPhysicsEngine) {
+                var physicsEngine = scene.getPhysicsEngine();
+                if (clonePhysicsImpostor && physicsEngine) {
+                    var impostor = physicsEngine.getImpostorForPhysicsObject(source);
+                    if (impostor) {
+                        this.physicsImpostor = impostor.clone(this);
+                    }
                 }
             }