StationaryGunMotorSystem process

protected void process(Entity e) {
        // TODO if baseBody was destroyed then disable rotation
        StationaryGunMotorComponent gunComponent = components.get(e);
        Box2dBodyComponent bodyComponent = Box2dBodySystem.components.get(e);

        float desiredWorldAngle = gunComponent.getDesiredWorldAngleRads();
        float currWorldAngle = MathUtilsExt.absRadians(bodyComponent.body.getAngle());
        float angleDelta = MathUtilsExt.diffAbsoluteRadians(currWorldAngle, desiredWorldAngle);
        if (MathUtilsExt.areDecimalsEqual(angleDelta, 0)) {
            return;
        }

        // act motor
        Box2dMotorJointActionComp motorJointActionComp = Box2dMotorJointActionSystem.components.create(e);
        motorJointActionComp.force = (angleDelta / Math.abs(angleDelta)) * FORCE_DELTA;
    }