src/code/kalter/longflight/game/Bullet.java

   1 package code.kalter.longflight.game;
   2
   3 import code.kalter.longflight.Loader;
   4 import code.kalter.longflight.game.bullet.Collisionable;
   5 import code.kalter.longflight.game.bullet.Gun;
   6 import java.io.IOException;
   7 import javax.microedition.lcdui.Graphics;
   8 import javax.microedition.lcdui.Image;
   9
  10 /**
  11  * Пули!
  12  *
  13  * @author KalterFive
  14  */
  15 public class Bullet implements Gun {
  16
  17     private final int SIZE = 128;
  18     private final int screenH;
  19
  20     private final Image[] gfx;
  21
  22     private final int[] positionX;
  23     private final int[] positionY;
  24     private final int[] type;
  25
  26     private Collisionable[] object;
  27
  28     public Bullet(int screenH) throws IOException {
  29         this.screenH = screenH;
  30         positionX = new int[SIZE];
  31         positionY = new int[SIZE];
  32         type = new int[SIZE];
  33         Loader imageLoader = Loader.getInstance();
  34         gfx = new Image[]{
  35             imageLoader.getImage("/gfx/bullet/0.png"),
  36             imageLoader.getImage("/gfx/bullet/1.png")
  37         };
  38     }
  39
  40     // магия - все пули исчезают
  41     public void setNull() {
  42         for (int i = 0; i < SIZE; i++) {
  43             type[i] = NULL;
  44         }
  45     }
  46
  47     public void setCollisionable(Collisionable[] object) {
  48         this.object = object;
  49     }
  50
  51     public void update() {
  52         for (int i = 0; i < SIZE; i++) {
  53             if (type[i] == NULL) {
  54                 continue;
  55             }
  56             collision(i);
  57             positionY[i] += (type[i] * 2 - 1) * 5;
  58             if ((positionY[i] < -10) || (positionY[i] > screenH)) {
  59                 type[i] = NULL;
  60             }
  61         }
  62     }
  63
  64     public void paint(Graphics graphics) {
  65         for (int i = 0; i < SIZE; i++) {
  66             if (type[i] == NULL) {
  67                 continue;
  68             }
  69             graphics.drawImage(gfx[type[i]], positionX[i], positionY[i], 0);
  70         }
  71     }
  72
  73     // override
  74     public void fire(int type, int positionX, int positionY) {
  75         for (int i = 0; i < SIZE; i++) {
  76             if (this.type[i] != NULL) {
  77                 continue;
  78             }
  79             this.type[i] = type;
  80             this.positionX[i] = positionX;
  81             this.positionY[i] = positionY;
  82             break;
  83         }
  84     }
  85
  86     private void collision(int i) {
  87         for (int j = 0; j < object.length; j++) {
  88             if (type[i] == object[j].getType()) {
  89                 continue;
  90             }
  91             if (object[j].isCollisionOfBullet(positionX[i], positionY[i])) {
  92                 object[j].boomOfBullet();
  93                 type[i] = NULL;
  94                 break;
  95             }
  96         }
  97     }
  98 }