enemy.java

实现了 移动 碰撞检测

import javax.microedition.lcdui.*;

public class Enemy
{
	final static int rest1 = 1; //静止的兵
	final static int tank2 = 2; //坦克
	final static int tower3 = 3; //塔
	final static int soldier_small4 = 4;//小远士兵
	final static int soldier_big5 = 5; //近士兵
	final static int plane6 = 6; //飞机
	final static int Hp9 = 9; //药水瓶子
	final static int smallstone10 = 10; //小石头
	final static int bigstone11 = 11; //大石头
	final static int casern12 = 12; //兵库
	final static int supersoj13 = 13; //特种兵
	final static int bus14 = 14; //汽车
	final static int bomb15 = 15; //手雷
	final static int Hp16 = 16; //药水瓶子
	final static int casern19 = 19; //兵库
	final static int casern20 = 20; //兵库
	final static int iteam23 = 23; //物品
	final static int bhouse24 = 24; //房子
	final static int shouse25 = 25; //房子
	final static int grass26 = 26; //草
	final static int coconut27 = 27; //椰子树
	final static int ship28 = 28; //船

	/** ******************精灵的属性********************** */

	int spriteType; //精灵的类型

	protected int hp = 100; //生命值

	protected int execution;//杀伤力
	int spriteX, spriteY; //精灵的位置
	int width, height; //图片的宽和高

	protected int collisionW, collisionH; //检测碰撞的宽和高
	protected int collisionX, collisionY; //检测碰撞区域的起始坐标
	protected int currentFrame; //单前的帧数
	protected int totalFrame; //总帧数

	protected Gameworld gameworld; //Canvas对象的实例

	boolean visible; //是否显示

	private int itemType; //枪支宝物的类型

	/** ******************精灵的各种状态********************** */

	int enemyState; //精灵的状态
	protected int nextState;
	protected int tempState; //临时状态，状态改变时保存前一个状态
	protected int tempFrame; //用来临时保存当前的状态的起始帧
	protected int tempTotalFrame; //用来临时保存当前状态的结束帧

	protected boolean isChangeState;//状态是否更新
	final static int STA_GO_RIGHT = 0;//向右运动
	final static int STA_DEAD = 1;//死亡
	final static int STA_FIRE = 2;//开火
	final static int STA_GO_LEFT = 3;//向左运动
	final static int STA_REST = 4;//静止
	final static int STA_TURN_HEAD = 5;//调转炮头
	final static int STA_IS_FIRED = 8;//被攻击
	final static int STA_FIRE_END = 9;//攻击动作结束，继续播放爆炸效果
	final static int STA_ROLL_RIGHT = 10;//向右翻滚
	final static int STA_ROLL_LEFT = 11;//向左翻滚
	final static int STA_HIDEING = 12;//隐藏中
	final static int STA_SPUER = 13; //无敌状态

	/**
	 * 敌人类型说明 
	 *  01 远景敌人1     		02 坦克1     			03 塔      
	 *  04 近景敌人1（机枪） 	05 近景敌人1（手雷）		06 飞机1
	 *  09 血瓶      		010 小石头      			011 大石头 
	 *  012 兵库     		013 特种兵1     			015 敌人手雷1 	016 血瓶 
	 *  019 兵库     		020 兵库    				021 血瓶
	 *  022 血瓶    			023 掉落的物品			024房子
	 *  026 大汽油罐   		027 小汽油罐  			028 船1 
	 *  14 汽车				17 高射炮炮弹    			18 空袭     
	 *  29 探照灯       		30 障碍球
	 */

	private long time; //子弹发射间隔
	private int frameSpace; //动画帧间隔时间
	private int randomTime; //随机时间
	private boolean isTrigger = false; //触发器控制开关
	private boolean isFisrt = true;

	int seed;//多桢图片随机种子
	private int movedTimes; //已经移动的时间
	private int moveTime; //移动限制时间
	private long lastTime; //时间控制

	boolean isFire;//开火子弹显示控制

	private int addPosition; //画面被撕裂时的位置增量

	//构造
	public Enemy(int w, int h, int type, Gameworld world)
	{
		width = w;
		height = h;
		spriteType = type;
		gameworld = world;
		seed = world.randomNum(3);
	}

	//准确设置生命值
	public final void setHP(int i)
	{
		if (i > 100)
		{
			hp = 100;
		} else if (i < 0)
		{
			i = 0;
		} else
		{
			hp = i;
		}
	}

	//开火
	final void action()
	{
		gameworld.player.killHP(execution);
	}

	//设置精灵位置
	public final void setPosition(int x, int y)
	{
		spriteX = x;
		spriteY = y;
	}

	//与敌人的碰撞检测,矩形检测
	final boolean isCollision1(Enemy sp, int x, int y)
	{
		if (sp.collisionY + sp.height < y
				|| sp.collisionY > y + collisionH + 10
				|| sp.collisionX + sp.width < x
				|| sp.collisionX > x + collisionW + 10)
		{
			return false;
		}
		return true;
	}

	//移动精灵
	public final void move(int i, int j)
	{
		spriteX += i;
		spriteY += j;
		collisionX += i;
		collisionY += j;

		//移动的敌人如果超出了边界自动消失
		if (this.spriteX >= gameworld.screenWidth - gameworld.offsetX
				|| this.spriteX <= Math.abs(gameworld.offsetX) - this.width)
		{
			this.visible = false;
			gameworld.enemyCount--;
		}
	}

	//计算触发时间
	public final void trigger(int i_time)
	{
		i_time = i_time <= 0 ? 1000 : i_time;
		time += System.currentTimeMillis() - lastTime;
		if (time >= i_time)
		{
			time = 0;
			isTrigger = true;
		} else
		{
			isTrigger = false;
		}
	}

	/**
	 * 被子弹击中后,扣掉生命值
	 * 
	 * @param i_hp
	 *            损伤的生命值
	 */
	public final void killHP(int i_hp)
	{
		if (this.enemyState != Enemy.STA_DEAD)
		{
			hp -= i_hp;
			setHP(hp);
			if (hp <= 0)
			{
				if (gameworld.sound)
				{
					if (spriteType == 2 || spriteType == 3 || spriteType == 6
							|| spriteType == 8 || spriteType == 9
							|| spriteType == 21 || spriteType == 22
							|| spriteType == 28)
					{
						try
						{
							gameworld.soundSFX[1].start();
						} catch (Exception ex)
						{
							ex.printStackTrace();
						}

					}
				}
				changeState(Enemy.STA_DEAD); //改变为死亡状态
				return;
			}
			//特种兵被击中后自动朝屏幕中心滚动
			if (spriteType == 13)
			{
				if ((this.spriteX + gameworld.offsetX >= gameworld.screenWidth / 2))
				{
					nextState = STA_ROLL_LEFT;
				} else
				{
					nextState = STA_ROLL_RIGHT;
				}
			}
		}
	}

	//设置敌人类型和坐标
	public final void init(int x, int type)
	{
		this.visible = true;//设置为可见
		spriteType = type; //保存类型
		spriteX = x;
		isFisrt = true;
		isTrigger = false;
		time = 0;
		lastTime = 0;
		movedTimes = 0;
		moveTime = 0;

		switch (type)
		{
		case 1: //静止的步兵生命为1
			if (gameworld.level > 3 && gameworld.level < 7)
				spriteY = 40;
			else
				spriteY = 80;
			setHP(1);
			width = 52;
			height = 55;
			collisionW = 15;
			collisionH = 15;
			collisionX = spriteX + 3;
			collisionY = spriteY + 5;
			execution = 1; //杀伤力
			enemyState = Enemy.STA_REST; //状态
			nextState = enemyState; //下一个状态
			changeState(enemyState);//改变状态
			randomTime = gameworld.randomNum(6); //随即1-5秒后射击
			break;
		case tank2: //坦克
			spriteY = 120;
			setHP(5);
			width = 95;
			height = 63;
			collisionW = 80;
			collisionH = 60;
			this.collisionX = spriteX+60;
			this.collisionY = spriteY;
			execution = 5;
			enemyState = Enemy.STA_REST;
			nextState = enemyState;
			changeState(enemyState);
			randomTime = 4000; //坦克在4秒后触发
			break;
		case tower3: //塔
			if (gameworld.level < 4)
				spriteY = -5;
			else
				spriteY = 120;

			width = 88;
			height = 120;
			enemyState = Enemy.STA_REST;
			nextState = enemyState;
			changeState(enemyState);

			break;
		case soldier_small4: //随机出现的步兵
		case soldier_big5: //手雷兵
			if (seed == 0)
				spriteY = 150;
			else
				spriteY = 160;
			setHP(1);
			width = 52;
			height = 56;
			collisionW = 15;
			collisionH = 20;
			collisionX = spriteX + 10;
			collisionY = spriteY + 5;
			execution = 1;
			enemyState = Enemy.STA_GO_RIGHT;
			nextState = enemyState;
			changeState(enemyState);
			break;
		case plane6: //飞机
			if (seed < 2)
				spriteY = 32;
			else
				spriteY = 16;
			setHP(8);
			width = 93;
			height = 48;
			collisionW = 50;
			collisionH = 20;
			collisionX = spriteX + 20;
			collisionY = spriteY + 10;
			execution = 1;
			enemyState = Enemy.STA_GO_RIGHT;
			nextState = enemyState;
			changeState(enemyState);
			break;
		case Hp9: //油桶
			spriteY = 160;
			setHP(1);
			width = 20;
			height = 16;
			this.collisionW = 16;
			this.collisionH = 14;
			collisionX = spriteX - 2;
			collisionY = spriteY - 2;
			enemyState = STA_GO_RIGHT;
			nextState = STA_GO_RIGHT;
			changeState(0);
			break;
		case smallstone10: //小石头
			if (seed < 2)
				spriteY = 144;
			else
				spriteY = 160;
			width = 71;
			height = 32;
			enemyState = STA_GO_RIGHT;
			nextState = STA_GO_RIGHT;
			changeState(0);
			break;
		case bigstone11://大石头
			if (seed == 0)
				spriteY = 130;
			else if (seed == 1)
				spriteY = 140;
			else
				spriteY = 192;
			width = 71;
			height = 32;
			enemyState = STA_GO_RIGHT;
			nextState = STA_GO_RIGHT;
			changeState(0);
			break;
		case casern12:
			spriteY = 100;
			setHP(3);
			width = 115;
			height = 54;
			this.collisionW = 16;
			this.collisionH = 16;
			collisionX = spriteX + 16;
			collisionY = spriteY + 30;
			execution = 2;
			enemyState = Enemy.STA_REST;
			nextState = enemyState;
			changeState(enemyState);
			break;
		case supersoj13: //特种兵
			spriteY = 128;
			setHP(8);
			width = 52;
			height = 54;
			this.collisionW = 20;
			this.collisionH = 20;
			collisionX = spriteX + 10;
			collisionY = spriteY + 5;
			execution = 3;
			enemyState = Enemy.STA_GO_LEFT;
			nextState = enemyState;
			changeState(enemyState);
			break;
		case bus14: //汽车
			if (seed == 0)
				spriteY = 110;
			else
				spriteY = 90;
			setHP(8);
			width = 125;
			height = 72;
			this.collisionW = 70;
			this.collisionH = 30;
			collisionX = spriteX + 20;
			collisionY = spriteY + 20;
			execution = 5;
			this.randomTime = 8;
			enemyState = Enemy.STA_REST;
			nextState = enemyState;
			changeState(enemyState);
			break;
		case bomb15: //敌人手雷
			if (seed == 0)
				spriteY = 150;
			else
				spriteY = 160;
			width = 30;
			height = 30;
			this.collisionW = 5;
			this.collisionH = 5;
			collisionX = spriteX + 5;
			collisionY = spriteY + 5;
			enemyState = STA_GO_RIGHT;
			execution = 2;
			nextState = STA_GO_RIGHT;
			changeState(STA_GO_RIGHT);
			break;
		case Hp16: //医疗箱
			if (seed <2)
				spriteY = 160;
			else
				spriteY = 192;
			height = 12;
			width = 28;
			this.collisionW = 16;
			this.collisionH = 16;
			collisionX = spriteX;
			collisionY = spriteY;
			enemyState = STA_GO_RIGHT;
			nextState = STA_GO_RIGHT;
			changeState(STA_GO_RIGHT);
			break;
		case 21: //血瓶
		case 22:
			if (seed < 2)
				spriteY = 176;
			else
				spriteY = 160;
			setHP(1);
			width = 10;
			height = 16;
			this.collisionW = 8;
			this.collisionH = 14;
			collisionX = spriteX;
			collisionY = spriteY;
			enemyState = STA_GO_RIGHT;
			nextState = STA_GO_RIGHT;
			changeState(STA_GO_RIGHT);
			break;
		case iteam23: //各种宝物
			if (seed < 2)
				spriteY = 144;
			else
				spriteY = 160;
			height = 16;
			width = 16;
			collisionW = 14;
			collisionH = 14;
			collisionX = spriteX;
			collisionY = spriteY - 2;
			enemyState = STA_GO_RIGHT;
			nextState = STA_GO_RIGHT;
			changeState(STA_GO_RIGHT);
			itemType = gameworld.randomNum(3); //随机计算宝物类型1/3几率掉空袭导弹
			break;
		case bhouse24: //大房子
			spriteY = 30;
			width = 168;
			height = 87;
			enemyState = Enemy.STA_REST;
			nextState = enemyState;
			changeState(enemyState);
			break;

		case grass26: //草
			if (seed == 0)
				spriteY = 100;
			else if (seed == 1)
				spriteY = 120;
			else
				spriteY = 140;
			width = 54;
			height = 32;
			enemyState = Enemy.STA_REST;
			nextState = enemyState;
			changeState(enemyState);
			break;

		case coconut27: //椰子
			if (seed == 0)
				spriteY = 10;
			else
				spriteY = 20;
			width = 74;
			height = 143;
			enemyState = Enemy.STA_REST;
			nextState = enemyState;
			changeState(enemyState);