package code.kalter.longflight.space;

import code.kalter.longflight.Color;
import java.util.Random;
import javax.microedition.lcdui.Graphics;

/**
 * Звёзды...
 *
 * @author KalterFive
 */
class Star {

    private final int screenH;
    private final int COUNT;
    private final int[] positionX;
    private final int[] positionY;
    private final int[] color;

    public Star(int screenW, int screenH) {
        this.screenH = screenH;
        Random random = new Random();
        COUNT = (screenH + screenW) / 3;
        positionX = new int[COUNT];
        positionY = new int[COUNT];
        color = new int[COUNT];
        for (int i = 0; i < COUNT; i++) {
            positionX[i] = random.nextInt(screenH);
            positionY[i] = random.nextInt(screenW);
            int a = random.nextInt(256);
            color[i] = Color.maskRGB(a, a, a);
        }
    }

    public void paint(Graphics graphics) {
        for (int i = 0; i < COUNT; i++) {
            graphics.setColor(color[i]);
            graphics.fillRect(positionX[i], positionY[i], 1, 1);
        }
    }

    public void upd() {
        for (int i = 0; i < COUNT; i++) {
            if ((positionY[i] += ((color[i] & 0x0000FF) / 50)) > screenH) {
                positionY[i] = 0;
            }
        }
    }
}