java 抛物线_关于java中模拟抛物线轨迹的问题

最新推荐文章于 2023-05-07 11:36:24 发布

原创最新推荐文章于 2023-05-07 11:36:24 发布 · 506 阅读

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#java 抛物线

本文通过一个Java代码示例展示了如何模拟抛物线轨迹，以帮助理解类似游戏的运行机制。代码包括了 Zombies 和 Bullet 类，实现了子弹沿抛物线轨迹击中僵尸的效果。

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看了这套题目感觉很有兴趣，就花了一e69da5e6ba903231313335323631343130323136353331333264623831个中午亲手给你写了一个类似的例子，相信可以帮助你对这个游戏有很好的理解，从右向左那个是僵尸，点一下鼠标就出现植物，我只是起到一个抛砖引玉的作用。代码如下(绝对可以用的代码)：

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.event.MouseEvent;

import java.util.Vector;

import javax.swing.JFrame;

import javax.swing.event.MouseInputAdapter;

public class PlantsAndZombies extends JFrame {

private static final long serialVersionUID = 1L;

public static final int screenWidth=800;

public static final int screenHeight=600;

Printer printer;

Zombies zombies=new Zombies();

Thread T_Zombies;

Bullet bullet=new Bullet();

Thread T_Bullet;

public PlantsAndZombies(){

this.setSize(new Dimension(screenWidth,screenHeight));

this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

this.addMouseListener(new Shoot(this));

this.setVisible(true);

printer=new Printer( this.getGraphics());

printer.Add(zombies);

printer.Add(bullet);

T_Zombies=new Thread(zombies);

T_Zombies.start();

T_Bullet=new Thread(bullet);

T_Bullet.start();

}

public void Shoot(){

bullet.getTarget(zombies);

}

public static void main(String[] args){

PlantsAndZombies game=new PlantsAndZombies();

}

public void run() {

while(true){

}

interface Drawable{

void drawMe(Graphics g);

}

class Zombies implements Drawable,Runnable{

public boolean isLive=true;

public int x=PlantsAndZombies.screenWidth;

public int y=500;

public void run() {

while(true){

if(x>10){

x-=20;

}else x=PlantsAndZombies.screenWidth;

try {

Thread.sleep(500);

} catch (InterruptedException e) {

e.printStackTrace();

}

public void drawMe(Graphics g){

g.drawRect(x,y,20,50);

}

class Bullet implements Drawable,Runnable{

private int x=0;

private int y=500;

private Zombies _z;

private float a,b,c;

private float step;

public void getTarget(Zombies z){

_z=z;

// 用三点确定一个抛物线的方法，计算弹道

int x1=0;

int y1=500;

int x2=(z.x-6*20)/2;

int y2=300; // 抛物线高度200个像素

int x3=z.x-6*20; // 假设击中僵尸用3秒钟，在这3秒钟内僵尸向前移动了6*20个像素

int y3=500;

a=(float)((y2-y1)*(x3-x2)-(y3-y2)*(x2-x1))/(float)((x2*x2-x1*x1)*(x3-x2)-(x3*x3-x2*x2)*(x2-x1));

b=(float)((y2-y1)-a*(x2*x2-x1*x1))/(float)(x2-x1);

c=y1-a*x1*x1-b*x1;

step=(float)(x3-x1)/(float)(3*20);

}

public void run() {

while(true){

try {

x+=step;

y=(int)(a*x*x+b*x+c);

if(y>500){

_z.isLive=false;

}

Thread.sleep(50);

} catch (InterruptedException e) {

e.printStackTrace();

}

public void drawMe(Graphics g) {

g.drawRect(x,y,20,20);

}

class Printer extends Thread{

private Vector v=new Vector();

private Graphics _g;

public Printer(Graphics g){

_g=g;

this.start();

}

public void Add(Drawable o){

v.add(o);

}

public void run(){

while(true){

_g.clearRect(0,0,PlantsAndZombies.screenWidth,PlantsAndZombies.screenHeight);

for(Drawable o:v){

o.drawMe(_g);

}

try {

Thread.sleep(500);

} catch (InterruptedException e) {

e.printStackTrace();

}

class Shoot extends MouseInputAdapter{

private PlantsAndZombies _adaptee;

public Shoot(PlantsAndZombies adaptee){

_adaptee=adaptee;

}

public void mouseClicked(MouseEvent e) {

_adaptee.Shoot();

}