Method inset

src/main/java/field/utility/Rect.java:129–131

(float by)

	}

	public Rect inset(float by) {
		return new Rect(x+by, y+by, w-by*2, h-by*2);
	}

	public boolean intersectsX(double x) {
		return (x>=this.x && x<this.x+this.w);