package?convexHull;

import?java.awt.*;
import?java.awt.event.WindowAdapter;
import?java.awt.event.WindowEvent;
import?java.awt.image.BufferedImage;
import?java.util.linkedList;
import?java.util.PriorityQueue;



public?class?ConvexHull?{
	private?frame?f?=?new?frame（“CovexHull“）;
	private?final?int?num?=?60;
	private?MyPoint[]?p?=?new?MyPoint[num];
	private?PriorityQueue?p1Queue?=?new?PriorityQueue（）;
	private?PriorityQueue?p2Queue?=?new?PriorityQueue（）;
	BufferedImage?image?=?new?BufferedImage（800?600?BufferedImage.TYPE_INT_RGB）;
	Graphics?g?=?image.getGraphics（）;
	private?Color?foreColor?=?new?Color（25500）;
	private?MyCanvas?drawArea?=?new?MyCanvas（）;
	public?void?init（）{
		g.fillRect（0?0?800?600）;
		g.setColor（foreColor）;
		
		drawArea.setPreferredSize（new?Dimension（800600））;
		f.addWindowListener（new?MyListener（））;
		f.add（drawArea）;
		f.pack（）;
		f.setVisible（true）;
	}
	public?void?createPoint（）{
		int?i;
		p[0]=new?MyPoint（）;
		p[0].x=50;
		p[0].y=300;
		g.fillOval（p[0].x-3?p[0].y-3?6?6）;
		for（i=1;i			p[i]=new?MyPoint（）;
			p[i].x=100+600/num*i;
			p[i].y=50+（int）（Math.random（）*500）;
			g.fillOval（p[i].x-3?p[i].y-3?6?6）;
		}
		//i--;
		p[i]=new?MyPoint（）;
		p[i].x=750;
		p[i].y=300;
		g.fillOval（p[i].x-3?p[i].y-3?6?6）;
		drawArea.repaint（）;
		g.drawLine（p[0].x?p[0].y?p[num-1].x?p[num-1].y）;
		//for（i=0;i		//	g.drawLine（p[i].x?p[i].y?p[i+1].x?p[i+1].y）;
		//}
	}
	public?void?upHull（linkedList?sint?maxPriorityQueue?queue）{
		linkedList?s1?=?new?linkedList（）s2?=?new?linkedList（）;
		int?i=0divtemp1=0;
		MyPoint?temp;
		if（s.get（max）.x>0）{
			g.drawLine（s.getFirst（）.x?s.getFirst（）.y?s.get（max）.x?s.get（max）.y）;
			g.drawLine（s.get（max）.x?s.get（max）.y?s.getLast（）.x?s.getLast（）.y）;
		}
		else{
			g.drawLine（-s.getFirst（）.x?-s.getFirst（）.y?-s.get（max）.x?-s.get（max）.y）;
			g.drawLine（-s.get（max）.x?-s.get（max）.y?-s.getLast（）.x?-s.getLast（）.y）;
		}
		try?{
			Thread.sleep（1000）;
			drawArea.repaint（）;
		}?catch?（InterruptedException?e）?{
			//?TODO?Auto-generated?catch?block
			e.printStackTrace（）;
		}
		queue.add（s.get（max））;
		System.out.println（s.get（max））;
		//g.fillOval（s.get（max）.x?s.get（max）.y?10?10）;
		if（max>1）{
			while（i<=max）{
				
				s1.offerLast（s.get（i++））;
				
			}
			temp=s1.getFirst（）;
			for（i=1;i				
				div=s1.getFirst（）.x*（s1.getLast（）.y-s1.get（i）.y）+s1.getLast（）.x*（s1.get（i）.y-s1.getFirst（）.y）
						+s1.get（i）.x*（s1.getFirst（）.y-s1.getLast（）.y）;
				div*=-1;
				if（div>0）{
					if（div>temp1）{
						temp1=div;
						temp=s1.get（i）;	
					}
					i++;
				}
				else{
					s1.remove（i）;
					//System.out.println（i+“?“+s1.size（））;
				}
			}
			
			upHull（s1s1.indexOf（temp）queue）;
		}
		if（max			i=max;
			while（i				s2.offer（new?MyPoint（