public class Rect {
	private double left, top, right, bottom;
	private static final double DEFAULT_SIZE = 0.5;

	public Rect() {
		left = -DEFAULT_SIZE;
		top = DEFAULT_SIZE;
		right = DEFAULT_SIZE;
		bottom = -DEFAULT_SIZE;
	}

	public Rect(double left, double top, double right, double bottom) {
		this.left = left;
		this.top = top;
		this.right = right;
		this.bottom = bottom;
	}

	public void translateRect(double vx, double vy) {
		left += vx;
		top += vy;
		right += vx;
		bottom += vy;
	}

	public void rotateRect90graus() {
		double halfWidth = this.getWidth() / 2;
		double halfHeight = this.getHeight() / 2;
		double cx = this.getXCenter();
		double cy = this.getYCenter();

		left = cx - halfHeight;
		top = cy + halfWidth;
		right = cx + halfHeight;
		bottom = cy - halfWidth;

	}

	/*
	 * public void rotateRect90graus() { left = this.getXCenter() -
	 * (this.getHeight()/2); top = this.getYCenter() + (this.getWidth()/2);
	 * right = this.getXCenter() + (this.getHeight()/2); bottom =
	 * this.getYCenter() - (this.getWidth()/2); }
	 */

	public double getLeft() {
		return left;
	}

	public double getRight() {
		return right;
	}

	public double getTop() {
		return top;
	}

	public double getBottom() {
		return bottom;
	}

	public double getHeight() {
		return top - bottom;
	}

	public double getWidth() {
		return right - left;
	}

	public double getPerimeter() {
		double width = getWidth();
		double height = getHeight();

		return (2 * width) + (2 * height);
	}

	public double getArea() {
		return this.getWidth() * this.getHeight();
	}

	public double getXCenter() {
		return left + (this.getWidth() / 2);
	}

	public double getYCenter() {
		return bottom + (this.getHeight() / 2);
	}

	public boolean ptInRect(double x, double y) {
		return x >= left && x <= right && y <= top && y >= bottom;
	}

	public boolean rectInRect(Rect b) {
		return b.getLeft() >= left && b.getRight() <= right && b.getTop() <= top && b.getBottom() >= bottom;
	}

}