resultForce = resultForce.add(repulsiveForceWall(new Vector2D(x, 0)));
resultForce = resultForce.add(repulsiveForceWall(new Vector2D(x, G.minSize.getY())));
// we only need the impulse
return resultForce.normalize();
}
/**
* Compute the random force.
* We need a random impulse [-RAND_CONSTANT, ..., +RAND_CONSTANT]