src/code/kalter/longflight/space/Star.java

   1 package code.kalter.longflight.space;
   2
   3 import code.kalter.longflight.Color;
   4 import java.util.Random;
   5 import javax.microedition.lcdui.Graphics;
   6
   7 /**
   8  * Звёзды...
   9  *
  10  * @author KalterFive
  11  */
  12 class Star {
  13
  14     private final int screenH;
  15     private final int COUNT;
  16     private final int[] positionX;
  17     private final int[] positionY;
  18     private final int[] color;
  19
  20     public Star(int screenW, int screenH) {
  21         this.screenH = screenH;
  22         Random random = new Random();
  23         COUNT = (screenH + screenW) / 3;
  24         positionX = new int[COUNT];
  25         positionY = new int[COUNT];
  26         color = new int[COUNT];
  27         for (int i = 0; i < COUNT; i++) {
  28             positionX[i] = random.nextInt(screenH);
  29             positionY[i] = random.nextInt(screenW);
  30             int a = random.nextInt(256);
  31             color[i] = Color.maskRGB(a, a, a);
  32         }
  33     }
  34
  35     public void paint(Graphics graphics) {
  36         for (int i = 0; i < COUNT; i++) {
  37             graphics.setColor(color[i]);
  38             graphics.fillRect(positionX[i], positionY[i], 1, 1);
  39         }
  40     }
  41
  42     public void upd() {
  43         for (int i = 0; i < COUNT; i++) {
  44             if ((positionY[i] += ((color[i] & 0x0000FF) / 50)) > screenH) {
  45                 positionY[i] = 0;
  46             }
  47         }
  48     }
  49 }