Perfectly Elastic Ball Loses Velocity After Bounces in Zero Gravity Environment about rapier HOT 2 CLOSED

    //rescale the velocities of all bodies to correct the total energy to its expected value 
    pub fn restore_energy(&mut self, handle: rapier::RigidBodyHandle, expected_energy: f32) {
        let body = self.rigid_body_set.get_mut(handle).unwrap();
        let current_energy = body.linvel().norm_squared() * body.mass();
        let scale = (expected_energy / current_energy).sqrt();
        body.set_linvel(body.linvel() * scale, true);
    }