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.javapackage 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();}@Overridepublic 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{@Overridepublic void keyTyped(KeyEvent e) {}@Overridepublic 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;}}@Overridepublic 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();}}@Overridepublic 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);}}}}