bulletssprite.java

tank游戏

package src;

import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;

public class BulletsSprite extends Sprite implements Runnable {

	private int fx;// 子弹方向

	private int sd;// 子弹速度

	public int user;

	private boolean lift = false;

	int row, column;

	// Sprite sprite;

	public BulletsSprite(Image image, int frameWidth, int frameHeight) {
		super(image, frameWidth, frameHeight);
	}

	public void start(int mx, int my, int mfx, int msd, int master) {// 坦克坐标（mx,my）定位子弹坐标，mfx为子弹方向，msd为子弹速度
		if (!lift) {
			setPosition(mx + 6, my + 6);
			fx = mfx;
			sd = msd;
			user = master;
			lift = true;
			setVisible(lift);

			Thread thread = new Thread(this);
			thread.start();
		}
	}

	public void run() {

		while (lift) {
			// long times_s = System.currentTimeMillis();
			forward(sd, fx);
			// 检测子弹碰撞！
			bullettick();
			// long times_e = System.currentTimeMillis();
			// long times = times_e - times_s;

			// if (times > 20) {
			// times = 20;
			// }
			try {
				Thread.sleep(20);
			} catch (InterruptedException ie) {
				ie.printStackTrace();
			}
		}
	}

	public void forward(int b_sd, int b_fx) {
		if (b_fx == 1) {
			bulletsMove(b_sd, 0);
		} else if (b_fx == 2) {
			bulletsMove(b_sd, 0);
		} else if (b_fx == 3) {
			bulletsMove(0, b_sd);
		} else if (b_fx == 4) {
			bulletsMove(0, b_sd);
		}
	}

	public void bullettick() {

		if (this.collidesWith(TankCanvas.groundBoard, true)) {
			row = (this.getX() + 1) / 15; // 15是每张贴图（小砖块）的像素（长=宽=14)
			column = (this.getY() + 1) / 15;
			// MicroTankCanvas.explosion.start(this.getX(),this.getY());//调用爆炸方法
			try {
				TankCanvas.groundBoard.setCell(row, column, 0);
				// TankCanvas.groundBoard.setCell(column + 1, row, 0);
				// TankCanvas.groundBoard.setCell(column + 1, row + 1, 0);
				// TankCanvas.groundBoard.setCell(column - 1, row - 1, 0);
				// TankCanvas.groundBoard.setCell(column - 1, row, 0);
				// TankCanvas.groundBoard.setCell(column, row + 1, 0);
				// TankCanvas.groundBoard.setCell(column, row + -1, 0);
			} catch (Exception e) {
				// TODO: handle exception
			}
			setVisible(false);
			this.lift = false;
			// Thread.yield();
		}else if ( (this.collidesWith(TankCanvas.enemytanksprite, true)) && (user==1))
		 {
			//TankCanvas.explosion.start(getX(),getY());//调用爆炸方法

		 TankCanvas.enemytanksprite.elift=false;
		 TankCanvas.enemytanksprite.setVisible(false);
		 TankCanvas.tankLayermanager.remove(TankCanvas.enemytanksprite);
		 
		  TankCanvas.enemytanksprite.stop();

		 this.setVisible(false);
		 this.lift=false;
		  TankCanvas.enum=TankCanvas.enum-1;
		  Thread.yield();
		 
		 if (TankCanvas.enum>0)
		{ TankCanvas.createEnemyTank();
		}else{

//		进入下一关

		}

		} else if ((collidesWith(TankCanvas.playerTank, true)) && (user == 0)) {// MicroTankCanvas.explosion.start(getX(),getY());//调用爆炸方法
			TankCanvas.enemytanksprite.setVisible(false);
			TankCanvas.tankLayermanager.remove(TankCanvas.enemytanksprite);
			this.setVisible(false);
			this.lift = false;
			TankCanvas.num = TankCanvas.num - 1;
			Thread.yield();
			if (TankCanvas.num > 0) {
				TankCanvas.createTank();
			
		} else {

			// 结束游戏

			TankCanvas.gameover = true;
		}
	}
	}
	public void stop() {

		Thread.yield();

	}

	private void bulletsMove(int kx, int ky) {

		int bx = getX();
		int by = getY();
		bx += kx;
		by += ky;
		if (by < 0 || by > TankCanvas.canvasWidth) {
			this.setVisible(false);
			lift = false;
			Thread.yield();
		}
		if (bx < 0 || bx > TankCanvas.canvasWidth) {
			this.setVisible(false);
			lift = false;
			Thread.yield();
		}
		setPosition(bx, by);

	}
}