移动游戏对象

Okey我对编程相对比较陌生（只完成了一个学期的编程），我正在尝试创建我的Space Invaders游戏版本（http://www.aeonity.com/ab/游戏/街机经典/空间invaders.php）。我不想将它编程为applet，而是使用java中的StdDraw库来绘制所有内容。移动游戏对象

现在我已经画好了一切，但是我的“飞船/敌人”的动作有问题我已经想出了如何移动一个敌人，但不能让他们一下子全部移动。

我觉得我的创造敌人的功能并不是那么好，因为我必须自己写下每48个人的位置......我将让我的代码跟随，以便您可以看一看。在此先感谢。

/** Draw Enemies*/ 
public class Enemy{ 
    //yr and xr positions for rectangle 
    private double x1, y1, r1, w, h, xr, yr; 
    private double x2, y2, r2, x3, y3, r3; 
    public Enemy(double x, double y, double r, double width, double height, double xRec, double yRec, 
    double xSec, double ySec, double rSec, double xThird, double yThird, double rThird) 
    {x1 = x; y1 = y; r1 = r; w = width; h = height; xr = xRec; yr = yRec; 
    x2 = xSec; y2 = ySec; r2 = rSec; x3 = xThird; y3 = yThird; r3 = rThird;} 

public void DRAW_ENEMY(){ 
    StdDraw.setPenColor(StdDraw.PINK); 
    StdDraw.filledCircle(x1, y1, r1); 
    StdDraw.filledCircle(x2, y2, r2); 
    StdDraw.filledCircle(x3, y3, r3); 
    StdDraw.filledRectangle(xr, yr, w, h); 
} 
public void MOVE_ENEMY(Enemy e11, Enemy e12) { 
    double vx = 0.005; 

    while(true){ 
     if(e11.x2 > e12.x2 || e11.x1 < 0.004) { 
      vx = -vx; 
     } 
     //Update position 
     e11.x1 = e11.x1 + vx; 
     e11.x2 = e11.x2 + vx; 
     e11.x3 = e11.x3 + vx; 
     e11.xr = e11.xr + vx; 

     // clear the background 
     StdDraw.setPenColor(StdDraw.BLACK); 
     StdDraw.filledRectangle(0.5, 0.67, 0.6,0.18); 

     // draw ball on the screen 
     StdDraw.setPenColor(StdDraw.PINK); 
     e11.DRAW_ENEMY(); 

     // display and pause for 20 ms 
     StdDraw.show(80); 
    } 
} 


//Test client 
public static void main(String[] args){ 
    // create every object 
    Enemy e11 = new Enemy(0.10, 0.84, 0.01, 0.007, 0.022, 0.112, 0.82, 0.124, 0.84, 0.01, 0.112, 0.8, 0.009); 
    e11.DRAW_ENEMY(); 
    Enemy e12 = new Enemy(0.17, 0.84, 0.01, 0.007, 0.022, 0.182, 0.82, 0.194, 0.84, 0.01, 0.182, 0.8, 0.009); 
    e12.DRAW_ENEMY(); 
    Enemy e13 = new Enemy(0.24, 0.84, 0.01, 0.007, 0.022, 0.252, 0.82, 0.264, 0.84, 0.01, 0.252, 0.8, 0.009); 
    e13.DRAW_ENEMY(); 
    Enemy e14 = new Enemy(0.31, 0.84, 0.01, 0.007, 0.022, 0.322, 0.82, 0.334, 0.84, 0.01, 0.322, 0.8, 0.009); 
    e14.DRAW_ENEMY(); 
    Enemy e15 = new Enemy(0.38, 0.84, 0.01, 0.007, 0.022, 0.392, 0.82, 0.404, 0.84, 0.01, 0.392, 0.8, 0.009); 
    e15.DRAW_ENEMY(); 
    Enemy e16 = new Enemy(0.45, 0.84, 0.01, 0.007, 0.022, 0.462, 0.82, 0.474, 0.84, 0.01, 0.462, 0.8, 0.009); 
    e16.DRAW_ENEMY(); 
    Enemy e17 = new Enemy(0.52, 0.84, 0.01, 0.007, 0.022, 0.532, 0.82, 0.544, 0.84, 0.01, 0.532, 0.8, 0.009); 
    e17.DRAW_ENEMY(); 
    Enemy e18 = new Enemy(0.59, 0.84, 0.01, 0.007, 0.022, 0.602, 0.82, 0.614, 0.84, 0.01, 0.602, 0.8, 0.009); 
    e18.DRAW_ENEMY(); 
    Enemy e19 = new Enemy(0.66, 0.84, 0.01, 0.007, 0.022, 0.672, 0.82, 0.684, 0.84, 0.01, 0.672, 0.8, 0.009); 
    e19.DRAW_ENEMY(); 
    Enemy e110 = new Enemy(0.73, 0.84, 0.01, 0.007, 0.022, 0.742, 0.82, 0.754, 0.84, 0.01, 0.742, 0.8, 0.009); 
    e110.DRAW_ENEMY(); 
    Enemy e111 = new Enemy(0.80, 0.84, 0.01, 0.007, 0.022, 0.812, 0.82, 0.824, 0.84, 0.01, 0.812, 0.8, 0.009); 
    e111.DRAW_ENEMY(); 
    Enemy e112 = new Enemy(0.87, 0.84, 0.01, 0.007, 0.022, 0.882, 0.82, 0.894, 0.84, 0.01, 0.882, 0.8, 0.009); 
    e112.DRAW_ENEMY(); 

    Enemy e21 = new Enemy(0.10, 0.74, 0.01, 0.007, 0.022, 0.112, 0.72, 0.124, 0.74, 0.01, 0.112, 0.7, 0.009); 
    e21.DRAW_ENEMY(); 
    Enemy e22 = new Enemy(0.17, 0.74, 0.01, 0.007, 0.022, 0.182, 0.72, 0.194, 0.74, 0.01, 0.182, 0.7, 0.009); 
    e22.DRAW_ENEMY(); 
    Enemy e23 = new Enemy(0.24, 0.74, 0.01, 0.007, 0.022, 0.252, 0.72, 0.264, 0.74, 0.01, 0.252, 0.7, 0.009); 
    e23.DRAW_ENEMY(); 
    Enemy e24 = new Enemy(0.31, 0.74, 0.01, 0.007, 0.022, 0.322, 0.72, 0.334, 0.74, 0.01, 0.322, 0.7, 0.009); 
    e24.DRAW_ENEMY(); 
    Enemy e25 = new Enemy(0.38, 0.74, 0.01, 0.007, 0.022, 0.392, 0.72, 0.404, 0.74, 0.01, 0.392, 0.7, 0.009); 
    e25.DRAW_ENEMY(); 
    Enemy e26 = new Enemy(0.45, 0.74, 0.01, 0.007, 0.022, 0.462, 0.72, 0.474, 0.74, 0.01, 0.462, 0.7, 0.009); 
    e26.DRAW_ENEMY(); 
    Enemy e27 = new Enemy(0.52, 0.74, 0.01, 0.007, 0.022, 0.532, 0.72, 0.544, 0.74, 0.01, 0.532, 0.7, 0.009); 
    e27.DRAW_ENEMY(); 
    Enemy e28 = new Enemy(0.59, 0.74, 0.01, 0.007, 0.022, 0.602, 0.72, 0.614, 0.74, 0.01, 0.602, 0.7, 0.009); 
    e28.DRAW_ENEMY(); 
    Enemy e29 = new Enemy(0.66, 0.74, 0.01, 0.007, 0.022, 0.672, 0.72, 0.684, 0.74, 0.01, 0.672, 0.7, 0.009); 
    e29.DRAW_ENEMY(); 
    Enemy e210 = new Enemy(0.73, 0.74, 0.01, 0.007, 0.022, 0.742, 0.72, 0.754, 0.74, 0.01, 0.742, 0.7, 0.009); 
    e210.DRAW_ENEMY(); 
    Enemy e211 = new Enemy(0.80, 0.74, 0.01, 0.007, 0.022, 0.812, 0.72, 0.824, 0.74, 0.01, 0.812, 0.7, 0.009); 
    e211.DRAW_ENEMY(); 
    Enemy e212 = new Enemy(0.87, 0.74, 0.01, 0.007, 0.022, 0.882, 0.72, 0.894, 0.74, 0.01, 0.882, 0.7, 0.009); 
    e212.DRAW_ENEMY(); 

    Enemy e31 = new Enemy(0.10, 0.64, 0.01, 0.007, 0.022, 0.112, 0.62, 0.124, 0.64, 0.01, 0.112, 0.6, 0.009); 
    e31.DRAW_ENEMY(); 
    Enemy e32 = new Enemy(0.17, 0.64, 0.01, 0.007, 0.022, 0.182, 0.62, 0.194, 0.64, 0.01, 0.182, 0.6, 0.009); 
    e32.DRAW_ENEMY(); 
    Enemy e33 = new Enemy(0.24, 0.64, 0.01, 0.007, 0.022, 0.252, 0.62, 0.264, 0.64, 0.01, 0.252, 0.6, 0.009); 
    e33.DRAW_ENEMY(); 
    Enemy e34 = new Enemy(0.31, 0.64, 0.01, 0.007, 0.022, 0.322, 0.62, 0.334, 0.64, 0.01, 0.322, 0.6, 0.009); 
    e34.DRAW_ENEMY(); 
    Enemy e35 = new Enemy(0.38, 0.64, 0.01, 0.007, 0.022, 0.392, 0.62, 0.404, 0.64, 0.01, 0.392, 0.6, 0.009); 
    e35.DRAW_ENEMY(); 
    Enemy e36 = new Enemy(0.45, 0.64, 0.01, 0.007, 0.022, 0.462, 0.62, 0.474, 0.64, 0.01, 0.462, 0.6, 0.009); 
    e36.DRAW_ENEMY(); 
    Enemy e37 = new Enemy(0.52, 0.64, 0.01, 0.007, 0.022, 0.532, 0.62, 0.544, 0.64, 0.01, 0.532, 0.6, 0.009); 
    e37.DRAW_ENEMY(); 
    Enemy e38 = new Enemy(0.59, 0.64, 0.01, 0.007, 0.022, 0.602, 0.62, 0.614, 0.64, 0.01, 0.602, 0.6, 0.009); 
    e38.DRAW_ENEMY(); 
    Enemy e39 = new Enemy(0.66, 0.64, 0.01, 0.007, 0.022, 0.672, 0.62, 0.684, 0.64, 0.01, 0.672, 0.6, 0.009); 
    e39.DRAW_ENEMY(); 
    Enemy e310 = new Enemy(0.73, 0.64, 0.01, 0.007, 0.022, 0.742, 0.62, 0.754, 0.64, 0.01, 0.742, 0.6, 0.009); 
    e310.DRAW_ENEMY(); 
    Enemy e311 = new Enemy(0.80, 0.64, 0.01, 0.007, 0.022, 0.812, 0.62, 0.824, 0.64, 0.01, 0.812, 0.6, 0.009); 
    e311.DRAW_ENEMY(); 
    Enemy e312 = new Enemy(0.87, 0.64, 0.01, 0.007, 0.022, 0.882, 0.62, 0.894, 0.64, 0.01, 0.882, 0.6, 0.009); 
    e312.DRAW_ENEMY(); 

    Enemy e41 = new Enemy(0.10, 0.54, 0.01, 0.007, 0.022, 0.112, 0.52, 0.124, 0.54, 0.01, 0.112, 0.5, 0.009); 
    e41.DRAW_ENEMY(); 
    Enemy e42 = new Enemy(0.17, 0.54, 0.01, 0.007, 0.022, 0.182, 0.52, 0.194, 0.54, 0.01, 0.182, 0.5, 0.009); 
    e42.DRAW_ENEMY(); 
    Enemy e43 = new Enemy(0.24, 0.54, 0.01, 0.007, 0.022, 0.252, 0.52, 0.264, 0.54, 0.01, 0.252, 0.5, 0.009); 
    e43.DRAW_ENEMY(); 
    Enemy e44 = new Enemy(0.31, 0.54, 0.01, 0.007, 0.022, 0.322, 0.52, 0.334, 0.54, 0.01, 0.322, 0.5, 0.009); 
    e44.DRAW_ENEMY(); 
    Enemy e45 = new Enemy(0.38, 0.54, 0.01, 0.007, 0.022, 0.392, 0.52, 0.404, 0.54, 0.01, 0.392, 0.5, 0.009); 
    e45.DRAW_ENEMY(); 
    Enemy e46 = new Enemy(0.45, 0.54, 0.01, 0.007, 0.022, 0.462, 0.52, 0.474, 0.54, 0.01, 0.462, 0.5, 0.009); 
    e46.DRAW_ENEMY(); 
    Enemy e47 = new Enemy(0.52, 0.54, 0.01, 0.007, 0.022, 0.532, 0.52, 0.544, 0.54, 0.01, 0.532, 0.5, 0.009); 
    e47.DRAW_ENEMY(); 
    Enemy e48 = new Enemy(0.59, 0.54, 0.01, 0.007, 0.022, 0.602, 0.52, 0.614, 0.54, 0.01, 0.602, 0.5, 0.009); 
    e48.DRAW_ENEMY(); 
    Enemy e49 = new Enemy(0.66, 0.54, 0.01, 0.007, 0.022, 0.672, 0.52, 0.684, 0.54, 0.01, 0.672, 0.5, 0.009); 
    e49.DRAW_ENEMY(); 
    Enemy e410 = new Enemy(0.73, 0.54, 0.01, 0.007, 0.022, 0.742, 0.52, 0.754, 0.54, 0.01, 0.742, 0.5, 0.009); 
    e410.DRAW_ENEMY(); 
    Enemy e411 = new Enemy(0.80, 0.54, 0.01, 0.007, 0.022, 0.812, 0.52, 0.824, 0.54, 0.01, 0.812, 0.5, 0.009); 
    e411.DRAW_ENEMY(); 
    Enemy e412 = new Enemy(0.87, 0.54, 0.01, 0.007, 0.022, 0.882, 0.52, 0.894, 0.54, 0.01, 0.882, 0.5, 0.009); 
    e412.DRAW_ENEMY(); 
    e11.MOVE_ENEMY(e11,e12); 

} 
}

来源

2013-01-03 gthb7

参见[这里]（http://stackoverflow.com/questions/13999506/threads-with-key-bindings/14001011＃14001011）对于一些示例游戏逻辑和[this]（http://stackoverflow.com/questions/13825515/java-rectangle-collision-detection-confusion/13827649#13827649）变异和[另一个]（http://stackoverflow.com/questions/13739693/java-swing-ba sed-game-framework-any-advice/13740162＃13740162）and lastly [here]（http://stackoverflow.com/questions/13791614/lag-spike-when-moving-player/13792012#13792012） –

你应该重新格式化您的代码让我们更容易阅读 – Daniel

一些提示：将所有物品（至少是所有的敌人）放入'Collection' -vg一个'java.util.ArrayList'-将它们一起处理。此外，你的代码不会显示除“e11”之外的任何东西，如果你不改变其他敌人的值，它们将不会单独改变。 – SJuan76

首先让我们将它们实例化一点。

List<Enemy> enemies = new ArrayList<Enemy>(); 

for(int y = 0; y < 4; y++) { 
    for(int x = 0; x < 12; x++) { 
    Enemy enemy = new Enemy(x,y); //all other variables can be coded in constructor 
    enemies.add(enemy); 
    } 
}

现在，他们都在一个列表，可以更新他们

for(Enemy e : enemies) { 
    e.update(); //move a single enemy in the usual pattern ignoring his buddies 
}

，然后绘制

for(Enemy e : enemies) { 
    e.draw(); 
}

来源

2013-01-03 17:33:17 AbstractChaos

移动游戏对象

回答

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