import com.nttdocomo.ui.Graphics;
import com.nttdocomo.ui.Image;

public class Ball extends Object					// ボールの情報を保持
{
	/*   ---   Field   ---   */

	private Image image;

	private int x,y;
	private int vx,vy;

	private int rx,ry;								// 移動可能範囲

	/*   ---   Constructor   ---   */

	public Ball(Image image)
	{
		this.image=image;
	}

	/*   ---   初期化   ---   */

	public void setPosition(int x,int y)
	{
		this.x=x;
		this.y=y;
		
		vx=vy=0;
	}

	public void setRange(int x,int y)
	{
		this.rx=x;
		this.ry=y;
	}

	/*   ---   移動   ---   */

	public void left()
	{
		vx=Math.max(vx-1,-5);
	}

	public void right()
	{
		vx=Math.min(vx+1, 5);
	}

	public void jump()
	{
		if (y+vy==ry)
		{
			vy=-14;
		}
	}

	public void crash(Ball target)
	{
		target.vx=-target.vx+vx/2;
		target.vy=-target.vy+vy/2;
		vx=-vx;
		vy=-vy;
	}

	public void translate()
	{
		if (x+vx<0)
		{
			vx=(0-x);
		}
		else if (x+vx>rx)
		{
			vx=(rx-x);
		}
		vy=vy+2;
		if (y+vy>=ry && vy>0)
		{
			vy=(ry-y);
		}
		
		x+=vx;
		y+=vy;
	}

	/*   ---   情報   ---   */

	public int getX()
	{
		return x;
	}

	public int getY()
	{
		return y;
	}

	public Image getImage()
	{
		return image;
	}

	public boolean isNear(Ball target)
	{
		return (Math.abs((target.x+target.vx)-(x+vx))<image.getWidth () &&
		        Math.abs((target.y+target.vy)-(y+vy))<image.getHeight());
	}

	public boolean isStanding()
	{
		return (y==ry);
	}

	/*   ---   描画処理   ---   */

	public void paint(Graphics g)
	{
		g.drawImage(image,x,y);
	}
}