Matter. js check if bodies stopped moving

Question

I am using matter. js to create a 2d scene. I apply a force on a body in the scene, this body hits other bodies but eventually all bodies stop moving due to friction and loss of energy.

Somehow I need to detect when all bodies in the scene have stopped moving. I am finding difficulty doing so since after going through the documentation I did not find a built in method to do the check for me. Also I tried iterating through the bodies in the scene and checking some attributes I thought would determine if the object was moving or still, this got me nowhere.

Does anyone know of a clean way to check if all bodies in the scene are not moving anymore?

Answer 1

Did you try to loop through the bodies and check the property

http://brm.io/matter-js/docs/classes/Body.html#property_speed

and

http://brm.io/matter-js/docs/classes/Body.html#property_angularSpeed

if they are close to zero? (Remember that comparing any float to exactly zero will almost never give the behavior that you expect.)