public void setEField(float intensity, Vector3f direction) {
		if (intensity > ZERO) {
			if (eField == null)
				eField = new EField();
			eField.setIntensity(intensity);
			if (direction != null)
				eField.setDirection(direction.x, direction.y, direction.z);
		} else {
			eField = null;
		}
	}