package KinematicSimulator;

import java.awt.Color;
import java.awt.Graphics;

/**
 * A ball is a round Entity.
 *
 * @author Helena
 */

public class Ball extends Entity
{
	private double r;
	private boolean locked;

	protected Ball()
	{
	}

	protected Ball(
		double d,
		double d1,
		double d2,
		double d3,
		double d4,
		Color color1)
	{
		super(d, d1, d2, d3, color1);
		r = d4;
		locked = false;
	}

	public String toString()
	{
		return x + " " + y + " " + r + " " + color;
	}

	public void draw(Graphics g)
	{
		g.setColor(Color.black);
		g.drawOval(
			(int) (x - r),
			(int) (y - r),
			(int) (r * 2D),
			(int) (r * 2D));
		g.setColor(color);
		g.fillOval(
			(int) (x - r),
			(int) (y - r),
			(int) (r * 2D),
			(int) (r * 2D));
	}

	public void lock()
	{
		locked = true;
		xv = 0.0D;
		yv = 0.0D;
	}

	public void unlock()
	{
		locked = false;
	}

	public void move()
	{
		x = x + xv;
		y = y + yv;
	}

	public double pos_x()
	{
		return x;
	}

	public double pos_y()
	{
		return y;
	}

	public void setPos(double d, double d1)
	{
		x = d;
		y = d1;
	}

	public double radius()
	{
		return r;
	}

	public boolean collision(Ball ball)
	{
		double d = x;
		double d1 = y;
		double d2 = ball.x;
		double d3 = ball.y;
		return Math.sqrt(Math.pow(d - d2, 2D) + Math.pow(d1 - d3, 2D))
			< r + ball.r;
	}

	public void accelerate(double d, double d1)
	{
		if (!locked)
		{
			xv = xv + d;
			yv = yv + d1;
		}
	}

}