package cse1030.test2;

import cse1030.drawing.Point2D;

/**
 * A circle shape. Each circle is defined by its radius
 * and the position of its center point. The bounding box for
 * the circle is the square with length equal to twice
 * the radius.
 * 
 * @author CSE1030_F13_14
 *
 */
public class Circle extends Shape {

	/**
	 * Create a circle of radius <code>r</code> and center point <code>p</code>.
	 * 
	 * @param r the radius of the circle
	 * @param p the center point of the circle
	 */
	public Circle(double r, Point2D p) {
		super(2. * r, 2. * r, p);
	}
	
	/**
	 * Get the radius of the circle.
	 * 
	 * @return the radius of the circle
	 */
	public double getRadius() {
		return 0.5 * this.getWidth();
	}
	
	/**
	 * Get the area of the circle. The area of the circle is
	 * &pi; * radius * radius
	 * 
	 * @return the area of the circle
	 * @see cse1030.test2.Shape#getArea()
	 */
	@Override
	public double getArea() {
		double r = 0.5 * this.getWidth();
		return Math.PI * r * r;
	}
}