版本1.6
功能:
将敌人坦克击毙
分析:一颗子弹击中敌人坦克
步骤:
Missile中加入hitTank(Tank)方法,返回布尔类型
碰撞检测的辅助类Rectangle
为Tank和Missile都加入getRect方法
当击中敌人坦克时,坦克被打死,子弹也死去
增加控制Tank生死的量live
如果死去就不画了
注意:
不要照抄代码
沿着思路往里加入代码
版本1.7
功能:
加入爆炸
步骤:
添加爆炸类
用不同直径的圆模拟爆炸
加入live
加入位置属性
加入draw方法
爆炸应该存在于集合类中
TankClient加入集合
将集合中的爆炸逐一画出(如果死去就去除)
击毙一辆坦克后应产生爆炸
hitTank时应产生爆炸
版本1.8
功能:
添加多辆坦克
步骤:
用容器来装敌人的Tank
向容器中装入多辆敌人的Tank
画出来
运行,不能打掉
添加hitTanks方法,打一些列Tank
TankClient里面每发子弹都打tanks
import java.awt.*; import java.awt.event.*; import java.util.List; import java.util.ArrayList; public class TankClient extends Frame { public static final int GAME_WIDTH = 800; public static final int GAME_HEIGHT = 600; Tank myTank = new Tank(50, 50, true, this); List<Tank> tanks = new ArrayList<Tank>(); List<Explode> explodes = new ArrayList<Explode>(); List<Missile> missiles = new ArrayList<Missile>(); Image offScreenImage = null; public void paint(Graphics g) { g.drawString("missiles count:" + missiles.size(), 50, 50); g.drawString("explodes count:" + explodes.size(), 80, 80); g.drawString("tanks count:" + tanks.size(), 50, 90); for(int i=0;i<missiles.size();i++){ Missile m = missiles.get(i); m.hitTanks(tanks); //if(!m.isLive()) //missiles.remove(m); //else m.draw(g); } for(int i=0;i<explodes.size();i++){ Explode e = explodes.get(i); e.draw(g); } for(int i=0;i<tanks.size();i++){ Tank t = tanks.get(i); t.draw(g); } myTank.draw(g); } public void update(Graphics g) { if(offScreenImage == null) { offScreenImage = this.createImage(GAME_WIDTH, GAME_HEIGHT); } Graphics gOffScreen = offScreenImage.getGraphics(); Color c = gOffScreen.getColor(); gOffScreen.setColor(Color.GREEN); gOffScreen.fillRect(0, 0, GAME_WIDTH, GAME_HEIGHT); gOffScreen.setColor(c); paint(gOffScreen); g.drawImage(offScreenImage, 0, 0, null); } public void lauchFrame() { for(int i=0;i<10;i++){ tanks.add(new Tank((50+40*(i+1)), 50, false, this)); } this.setLocation(300, 50); this.setSize(GAME_WIDTH, GAME_HEIGHT); this.setTitle("TankWar"); this.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); this.setResizable(false); this.setBackground(Color.GREEN); this.addKeyListener(new KeyMonitor()); setVisible(true); new Thread(new PaintThread()).start(); } public static void main(String[] args) { TankClient tc = new TankClient(); tc.lauchFrame(); } private class PaintThread implements Runnable { public void run() { while(true) { repaint(); try { Thread.sleep(50); } catch (InterruptedException e) { e.printStackTrace(); } } } } private class KeyMonitor extends KeyAdapter { public void keyReleased(KeyEvent e) { myTank.keyReleased(e); } public void keyPressed(KeyEvent e) { myTank.keyPressed(e); } } }
import java.awt.*; import java.awt.event.*; public class Tank { public static final int XSPEED = 5; public static final int YSPEED = 5; public static final int WIDTH = 30; public static final int HEIGHT = 30; private boolean live = true; public boolean isLive() { return live; } public void setLive(boolean live) { this.live = live; } TankClient tc = null; private boolean good; private int x, y; private boolean bL=false, bU=false, bR=false, bD = false; enum Direction {L, LU, U, RU, R, RD, D, LD, STOP}; private Direction dir = Direction.STOP; private Direction ptDir = Direction.D; public Tank(int x, int y, boolean good) { this.x = x; this.y = y; this.good = good; } public Tank(int x, int y, boolean good, TankClient tc) { this(x, y, good); this.tc = tc; } public void draw(Graphics g) { if(!live) { if(!good){ tc.tanks.remove(this); } return; } Color c = g.getColor(); if(good) g.setColor(Color.RED); else g.setColor(Color.BLUE); g.fillOval(x, y, WIDTH, HEIGHT); g.setColor(c); switch(ptDir) { case L: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT/2); break; case LU: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y); break; case U: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x+Tank.WIDTH/2, y); break; case RU: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x+Tank.WIDTH, y); break; case R: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x+Tank.WIDTH, y + Tank.HEIGHT/2); break; case RD: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x+Tank.WIDTH, y + Tank.HEIGHT); break; case D: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x+Tank.WIDTH/2, y + Tank.HEIGHT); break; case LD: g.drawLine(x + Tank.WIDTH/2, y + Tank.HEIGHT/2, x, y + Tank.HEIGHT); break; } move(); } void move() { switch(dir) { case L: x -= XSPEED; break; case LU: x -= XSPEED; y -= YSPEED; break; case U: y -= YSPEED; break; case RU: x += XSPEED; y -= YSPEED; break; case R: x += XSPEED; break; case RD: x += XSPEED; y += YSPEED; break; case D: y += YSPEED; break; case LD: x -= XSPEED; y += YSPEED; break; case STOP: break; } if(this.dir != Direction.STOP) ptDir = dir; if(x < 0) x = 0; if(y < 28) y = 28; if(x + Tank.WIDTH > TankClient.GAME_WIDTH) x = TankClient.GAME_WIDTH - Tank.WIDTH; if(y + Tank.HEIGHT > TankClient.GAME_HEIGHT) y = TankClient.GAME_HEIGHT - Tank.HEIGHT; } public void keyPressed(KeyEvent e) { int key = e.getKeyCode(); switch(key) { case KeyEvent.VK_LEFT : bL = true; break; case KeyEvent.VK_UP : bU = true; break; case KeyEvent.VK_RIGHT : bR = true; break; case KeyEvent.VK_DOWN : bD = true; break; } locateDirection(); } void locateDirection() { if(bL && !bU && !bR && !bD) dir = Direction.L; else if(bL && bU && !bR && !bD) dir = Direction.LU; else if(!bL && bU && !bR && !bD) dir = Direction.U; else if(!bL && bU && bR && !bD) dir = Direction.RU; else if(!bL && !bU && bR && !bD) dir = Direction.R; else if(!bL && !bU && bR && bD) dir = Direction.RD; else if(!bL && !bU && !bR && bD) dir = Direction.D; else if(bL && !bU && !bR && bD) dir = Direction.LD; else if(!bL && !bU && !bR && !bD) dir = Direction.STOP; } public void keyReleased(KeyEvent e) { int key = e.getKeyCode(); switch(key) { case KeyEvent.VK_CONTROL: fire(); break; case KeyEvent.VK_LEFT : bL = false; break; case KeyEvent.VK_UP : bU = false; break; case KeyEvent.VK_RIGHT : bR = false; break; case KeyEvent.VK_DOWN : bD = false; break; } locateDirection(); } public Missile fire(){ int x = this.x + Tank.WIDTH/2 - Missile.WIDTH; int y = this.y + Tank.HEIGHT/2 - Missile.HEIGHT; Missile m = new Missile(x , y, ptDir, this.tc); tc.missiles.add(m); return m; } public Rectangle getRect() { return new Rectangle(x, y, WIDTH, HEIGHT); } }
import java.awt.*; import java.util.List; public class Missile { public static final int XSPEED = 10; public static final int YSPEED = 10; public static final int WIDTH = 10; public static final int HEIGHT = 10; int x, y; Tank.Direction dir; private boolean Live = true; private TankClient tc; public boolean isLive() { return Live; } public Missile(int x, int y, Tank.Direction dir) { this.x = x; this.y = y; this.dir = dir; } public Missile(int x, int y, Tank.Direction dir, TankClient tc) { this(x, y, dir); this.tc = tc; } public void draw(Graphics g){ if(!Live){ tc.missiles.remove(this); return; } Color c = g.getColor(); g.setColor(Color.BLACK); g.fillOval(x, y, WIDTH, HEIGHT); g.setColor(c); move(); } private void move(){ switch(dir) { case L: x -= XSPEED; break; case LU: x -= XSPEED; y -= YSPEED; break; case U: y -= YSPEED; break; case RU: x += XSPEED; y -= YSPEED; break; case R: x += XSPEED; break; case RD: x += XSPEED; y += YSPEED; break; case D: y += YSPEED; break; case LD: x -= XSPEED; y += YSPEED; break; } if(x <0 || y < 0 || x > TankClient.GAME_WIDTH || y > TankClient.GAME_HEIGHT){ Live = false; } } public Rectangle getRect() { return new Rectangle(x, y, WIDTH, HEIGHT); } public boolean hitTank(Tank t) { if(this.getRect().intersects(t.getRect()) && t.isLive()) { t.setLive(false); this.Live = false; Explode e = new Explode(x, y, tc); tc.explodes.add(e); return true; } return false; } public boolean hitTanks(List<Tank> tanks){ for(int i=0;i<tanks.size();i++){ if(hitTank(tanks.get(i))){ return true; } } return false; } }
import java.awt.*; public class Explode { int x, y; private boolean live = true; private TankClient tc; int[] diameter = {4, 7, 12, 18, 26, 32, 49, 30, 14, 6}; int step = 0; public Explode(int x, int y, TankClient tc){ this.x = x; this.y = y; this.tc = tc; } public void draw(Graphics g){ if(!live) { tc.explodes.remove(this); return; } if(step == diameter.length){ live = false; step = 0; return; } Color c = g.getColor(); g.setColor(Color.ORANGE); g.fillOval(x, y, diameter[step], diameter[step]); step++; } }