oneall.java

计算机图形学中的一笔画长方形的java实现

//<applet code=NewOne width=700 height=400></applet>

import java.awt.*;
import java.applet.*;
import java.util.*;

public class OneAll extends Applet{
	int x0,y0,x1,y1;
	int width,height;
	int dgree;
	int length;
	int sleeptime;
	public void init(){
		sleeptime=100;		//一笔画后的停留时间
		dgree=15;			//分点数
		x0=100;				//左边中点坐标
		y0=200;	
		width=dgree*25;			//长方形边长
		height=200;			//长方形高
		x1=x0+width;
		y1=y0;
		length=width/dgree;//每一小段长度
		this.resize(600,600);
		this.setBackground(Color.black);
	}
	public void paint(Graphics g){
		g.setColor(Color.green);
		if(dgree%2!=0)
		for(int i=0;i<=width;i+=length){
			g.drawLine(x0, y0, x0+i, y0-height/2);
			try{
				Thread.sleep(sleeptime);
			}
			catch(InterruptedException e){
				
			}
			
			g.drawLine(x0+i, y0-height/2,x1,y1);
			try{
				Thread.sleep(sleeptime);
			}
			catch(InterruptedException e){
				
			}
			g.drawLine(x1,y1,x0+i,y0+height/2);
			try{
				Thread.sleep(sleeptime);
			}
			catch(InterruptedException e){
				
			}
			g.drawLine(x0+i,y0+height/2,x0,y0);
			try{
				Thread.sleep(sleeptime);
			}
			catch(InterruptedException e){
				
			}
		}
	}
}