Fix #5514

src/Physics/babylon.physicsHelper.ts

@@ -418,6 +418,8 @@ module BABYLON {
             }
 
             this._tickCallback = this._tick.bind(this);
+
+            this._prepareCylinder();
         }
 
         /**
@@ -452,6 +454,9 @@ module BABYLON {
          * @param force Specifies if the updraft should be disposed by force
          */
         public dispose(force: boolean = true) {
+            if (!this._cylinder) {
+                return;
+            }
             if (force) {
                 this._cylinder.dispose();
             } else {
@@ -513,8 +518,6 @@ module BABYLON {
         private _intersectsWithCylinder(impostor: PhysicsImpostor): boolean {
             var impostorObject = <AbstractMesh>impostor.object;
 
-            this._prepareCylinder();
-
             this._cylinder.position = this._cylinderPosition;
 
             return this._cylinder.intersectsMesh(impostorObject, true);
@@ -552,6 +555,8 @@ module BABYLON {
             this._origin.addToRef(new Vector3(0, this._height, 0), this._originTop);
 
             this._tickCallback = this._tick.bind(this);
+
+            this._prepareCylinder();
         }
 
         /**
@@ -671,8 +676,6 @@ module BABYLON {
         private _intersectsWithCylinder(impostor: PhysicsImpostor): boolean {
             var impostorObject = <AbstractMesh>impostor.object;
 
-            this._prepareCylinder();
-
             this._cylinder.position = this._cylinderPosition;
 
             return this._cylinder.intersectsMesh(impostorObject, true);