slowness fix

Slowness is due to units miscalculation

src/Physics/Plugins/babylon.cannonJSPlugin.ts

@@ -9,7 +9,7 @@
         private _fixedTimeStep: number = 1 / 60;
         //See https://github.com/schteppe/cannon.js/blob/gh-pages/demos/collisionFilter.html
         private _currentCollisionGroup = 2;
-        
+
         public constructor(private _useDeltaForWorldStep: boolean = true, iterations: number = 10) {
             if (!this.isSupported()) {
                 Tools.Error("CannonJS is not available. Please make sure you included the js file.");
@@ -29,7 +29,8 @@
         }
 
         public executeStep(delta: number, impostors: Array<PhysicsImpostor>): void {
-            this.world.step(this._fixedTimeStep, this._useDeltaForWorldStep ? delta : 0, 3);
+            // Delta is in seconds, should be provided in milliseconds
+            this.world.step(this._fixedTimeStep, this._useDeltaForWorldStep ? delta * 1000 : 0, 3);
         }
 
         public applyImpulse(impostor: PhysicsImpostor, force: Vector3, contactPoint: Vector3) {
@@ -430,23 +431,23 @@
             impostor.physicsBody.updateMassProperties();
         }
 
-        public getBodyMass(impostor: PhysicsImpostor):number {
+        public getBodyMass(impostor: PhysicsImpostor): number {
             return impostor.physicsBody.mass;
         }
 
-        public getBodyFriction(impostor: PhysicsImpostor):number {
+        public getBodyFriction(impostor: PhysicsImpostor): number {
             return impostor.physicsBody.material.friction;
         }
 
-        public setBodyFriction(impostor: PhysicsImpostor, friction:number) {
+        public setBodyFriction(impostor: PhysicsImpostor, friction: number) {
             impostor.physicsBody.material.friction = friction;
         }
 
-        public getBodyRestitution(impostor: PhysicsImpostor):number {
+        public getBodyRestitution(impostor: PhysicsImpostor): number {
             return impostor.physicsBody.material.restitution;
         }
 
-        public setBodyRestitution(impostor: PhysicsImpostor, restitution:number) {
+        public setBodyRestitution(impostor: PhysicsImpostor, restitution: number) {
             impostor.physicsBody.material.restitution = restitution;
         }
 
@@ -489,25 +490,25 @@
             joint.physicsJoint.motorEquation.minForce = lowerLimit === void 0 ? -upperLimit : lowerLimit;
         }
 
-        public syncMeshWithImpostor(mesh:AbstractMesh, impostor:PhysicsImpostor){
+        public syncMeshWithImpostor(mesh: AbstractMesh, impostor: PhysicsImpostor) {
             var body = impostor.physicsBody;
 
             mesh.position.x = body.position.x;
             mesh.position.y = body.position.y;
             mesh.position.z = body.position.z;
-            
+
             mesh.rotationQuaternion.x = body.quaternion.x;
             mesh.rotationQuaternion.y = body.quaternion.y;
             mesh.rotationQuaternion.z = body.quaternion.z;
             mesh.rotationQuaternion.w = body.quaternion.w;
         }
 
-        public getRadius(impostor: PhysicsImpostor):number{
+        public getRadius(impostor: PhysicsImpostor): number {
             var shape = impostor.physicsBody.shapes[0];
             return shape.boundingSphereRadius;
         }
 
-        public getBoxSizeToRef(impostor: PhysicsImpostor, result:Vector3):void{
+        public getBoxSizeToRef(impostor: PhysicsImpostor, result: Vector3): void {
             var shape = impostor.physicsBody.shapes[0];
             result.x = shape.halfExtents.x * 2;
             result.y = shape.halfExtents.y * 2;
@@ -515,7 +516,7 @@
         }
 
         public dispose() {
-            
+
         }
     }
 }