纯Java开发的游戏引擎V0.4--DEMO2 -- 物理引擎

文章由LinuxBoy分享于2019-04-01 07:04:26热评（307）

纯Java开发的游戏引擎V0.4--DEMO2 -- 物理引擎

项目命名： JPhysicalEngine
项目目的：自己爱好/毕业设计
项目人员： http://blog.csdn.net/kakashi8841
运行机器： Intel P8600 2.4GHz、2G内存、Intel GMA X4500 HD
开发环境： Linux Ubuntu 10.10
开发语言： Java
开发工具： Eclipse

项目描述：使用Java开发的2D游戏物理引擎，可以使得以后开发类似愤怒的小鸟、雷电等物理、碰撞、动作类游戏可以更快速、更方便。

项目进度：

    【已实现】
        版本完成日期       实现功能
        V0.1 [2011-04-07] 大致框架
        V0.2 [2011-04-11] 基本动画
        V0.3 [2011-04-15] 恒力和AABB碰撞检测
        V0.4 [2011-04-22] 框架优化、简单粒子系统

    【待实现】
        版本计划完成日期    实现功能
        V0.5 [2011-05-05] 更精确的OBB碰撞检测
        V0.6 [2011-05-10] 变力
        V0.7 [2011-05-12] 更完善的粒子系统
        V0.8 [2011-05-17] 弹力、引力
        V0.9 [2011-05-20] 框架优化、简单的输入输出操作

目前引用自制引擎做的DEMO2：

代码只需200+行：

* org.ubird.demo.Demo2.java
package org.ubird.demo;
import java.awt.Image;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.IOException;
import javax.imageio.ImageIO;
import org.ubird.app.SimpleGame;
import org.ubird.scene.ImageNode;
import org.ubird.scene.Node;
import org.ubird.scene.particle.ParticleNode;
import org.ubird.scene.particle.ParticleSystem;
/**
* 测试类2
* @author junhong.c
* @version 1.0
* @date 2011-4-23
*/
public class Demo2 extends SimpleGame{
private Node player;
private ParticleNode bomb = ParticleSystem.getParticles(500,15,15,10);
private Node[] bullets = new ImageNode[40];
private int currentBullet = 0;
private long delay; //子弹延时
private boolean fire;
private boolean fire2;
private boolean fire3;
private boolean down;
private boolean up;
private boolean right;
private boolean left;
public Demo2() {
super("Java2D游戏引擎 V0.4.0 -- By John.Cha");
}
public static void main(String[] args) throws IOException {
SimpleGame game = new Demo2();
game.setFPS(60);
game.setStageBackground("resources/bg.png");
game.setStageSize(1000,600);
game.start();
}
@Override
public void initWorld() {
initScene();
initNode();
initEvent();
}
/**
* 事件
*/
private void initEvent() {
addKeyListener(new MyKeyListener());
}
/**
* 定义自己的事件监听
* @author junhong.c
* @version 1.0
* @date 2011-4-22
*/
private class MyKeyListener implements KeyListener{
@Override
public void keyTyped(KeyEvent e) {}
@Override
public void keyReleased(KeyEvent e) {
switch(e.getKeyCode()){
case KeyEvent.VK_UP :
up=false;
break;
case KeyEvent.VK_DOWN:
down=false;
break;
case KeyEvent.VK_RIGHT:
right=false;
break;
case KeyEvent.VK_LEFT:
left=false;
break;
case KeyEvent.VK_A:
fire=false;
break;
case KeyEvent.VK_S:
fire2=false;
break;
case KeyEvent.VK_D:
fire3=false;
break;
}
}
@Override
public void keyPressed(KeyEvent e) {
if(fire && e.getKeyCode()==KeyEvent.VK_A) return;
if(fire2 && e.getKeyCode()==KeyEvent.VK_S) return;
if(fire3 && e.getKeyCode()==KeyEvent.VK_D) return;
if(up && e.getKeyCode()==KeyEvent.VK_UP) return;
if(down && e.getKeyCode()==KeyEvent.VK_DOWN) return;
if(left && e.getKeyCode()==KeyEvent.VK_LEFT) return;
if(right && e.getKeyCode()==KeyEvent.VK_RIGHT) return;
switch(e.getKeyCode()){
case KeyEvent.VK_UP :
up=true;
break;
case KeyEvent.VK_DOWN:
down=true;
break;
case KeyEvent.VK_RIGHT:
right=true;
break;
case KeyEvent.VK_LEFT:
left=true;
break;
case KeyEvent.VK_B:
bomb.start(player.getLocation().getIntX()-player.getWidth()/2-3,player.getLocation().getIntY()-player.getHeight());
break;
case KeyEvent.VK_A:
fire=true;
break;
case KeyEvent.VK_S:
fire2=true;
break;
case KeyEvent.VK_D:
fire3=true;
break;
}
getProcessThread().start();
}
}
/**
* 场景
*/
private void initScene() {
add(bomb);
}
/**
* 处理按键的线程
* @return
*/
public Thread getProcessThread(){
return new Thread(){
public void run(){
try {
while(up||down||left||right||fire||fire2||fire3){
Thread.sleep(1000/60);
float v = 0.2f;
if(up)
player.getVelocity().setY(-v);
else if(down)
player.getVelocity().setY(v);
if(left)
player.getVelocity().setX(-v);
else if(right)
player.getVelocity().setX(v);
if(!(up||down))
player.getVelocity().setY(0);
if(!(left||right))
player.getVelocity().setX(0);
if( fire ){
if(delay <= System.currentTimeMillis()){
for(int i=0; i<2; i++){
bullets[currentBullet].getVelocity().setY(-v*2f);
bullets[currentBullet].getVelocity().setX(0);
int fix = i == 0 ? -15 : 15;
float x = player.getLocation().getX()+(player.getWidth() - bullets[currentBullet].getWidth())*0.5f;
bullets[currentBullet].setLocation(fix+x, player.getLocation().getY()-bullets[currentBullet].getHeight());
currentBullet = ++currentBullet%bullets.length;
}
delay = System.currentTimeMillis()+80;
}
}
if(fire2){
if(delay <= System.currentTimeMillis()){
for(int i=0; i<3; i++){
bullets[currentBullet].getVelocity().setY(-v*2f);
int fix = i == 0 ? -15 : i==2 ? 15 : 0;
float vx = i==0 ? -v/4 : i==1 ? 0 : v/4;
bullets[currentBullet].getVelocity().setX(vx);
float x = player.getLocation().getX()+(player.getWidth() - bullets[currentBullet].getWidth())*0.5f;
bullets[currentBullet].setLocation(fix+x, player.getLocation().getY()-bullets[currentBullet].getHeight());
currentBullet = ++currentBullet%bullets.length;
}
delay = System.currentTimeMillis()+100;
}
}
if(fire3){
for(int i=0; i<bullets.length; i++){
bullets[currentBullet].getVelocity().setY(-v*2f);
int fix = i == 0 ? -15 : i==2 ? 15 : 0;
float vx = (float) (v*Math.cos(6.28*i/bullets.length));
float vy = (float) (v*Math.sin(6.28*i/bullets.length));
bullets[currentBullet].getVelocity().setX(vx);
bullets[currentBullet].getVelocity().setY(vy);
bullets[currentBullet].setLocation(fix+player.getLocation().getX()-player.getWidth()/2+2,player.getLocation().getY()-player.getHeight());
bullets[currentBullet].setDelay(currentBullet);
currentBullet = ++currentBullet%bullets.length;
}
fire3=false;
}
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
}
/**
*
*/
private void initNode() {
/**
* 初始化子弹
*/
try {
Image image = ImageIO.read(getClass().getClassLoader().getResource("resources/bullet.png"));
for(int i=0; i<bullets.length; i++){
bullets[i] = new ImageNode(image,i%6*35,0,35,35);
bullets[i].setSize(30,30);
bullets[i].setLocation(-500,-500);
add(bullets[i]);
}
player = new ImageNode(image,70,35,35,35); //平抛--图像结点
player.setSize(35,35);
player.setLocation((getStageWidth()-player.getWidth())/2,getStageHeight()-player.getHeight());
player.setMass(10);
add(player);
} catch (IOException e1) {
e1.printStackTrace();
}
}
@Override
public void updateWorld(long time) {
player.update(time);
bomb.update(time);
for(int i=0; i<bullets.length; i++){
if(bullets[i]!=null){
bullets[i].update(time);
}
}
}
}

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