Balls.java

package com.xerpi.core;

import java.util.LinkedList;
import java.util.ListIterator;
import java.util.Random;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;

public class Balls{
    Random random = new Random();
    public float screenW = 854;
    public float screenH = 480;
    LinkedList <Ball> balls = new LinkedList<Ball>();
    public int deleted;
    public boolean checkCollision(float x, float y, float w, float h, float x2,
            float y2, float w2, float h2) {
        if (x + w >= x2 && x <= x2 + w2 && y + h >= y2 && y <= y2 + h2) {
            return true;
        }
        return false;
    }
    public class Ball {
        public int type;
        public float x,y,inc_x,inc_y,w,h,speed,angle;
        public Bitmap image;
        boolean dead;

        public Ball(int type, Bitmap img){
            this.type = type;
            this.image = img;
            this.speed = 2;
            int num = random.nextInt(4);

            switch (num) {
            case 0:
                this.x = -this.image.getWidth();
                this.y = random.nextInt((int) screenH+this.image.getHeight()*2)-this.image.getHeight();
                break;
            case 1:
                this.x =  random.nextInt((int) screenW+this.image.getWidth()*2)-this.image.getWidth();
                this.y = -this.image.getHeight();
                break;
            case 2:
                this.x = screenW+this.image.getWidth();
                this.y = random.nextInt((int) screenH+this.image.getHeight()*2)-this.image.getHeight();
                break;
            case 3:
                this.x = random.nextInt((int) screenW+this.image.getWidth()*2)-this.image.getWidth();
                this.y = screenH+this.image.getHeight();
                break;
            }
            this.angle = (float) (Math.atan2(screenW/2-this.x,screenH/2-this.y)-1.57);
            this.inc_x = (float) Math.cos(-this.angle);
            this.inc_y = (float) Math.sin(-this.angle);

            if(type == 0){
    //          this.image = BitmapFactory.decodeFile("res/drawable-hdpi/ball1.png");
            }else if(type ==1){
    //          this.image = BitmapFactory.decodeFile("res/drawable-hdpi/ball2.png");
            }
        }
    }


    public void add(int type, Bitmap img){
        this.balls.add(new Ball(type,img));
    }

    public void blit(Canvas canvas, Paint paint){
        for (int i = 0; i < this.balls.size(); i++){
            canvas.drawBitmap(this.balls.get(i-deleted).image,this.balls.get(i-deleted).x,this.balls.get(i-deleted).y,paint);
        }

    }



    public void move() {
//      for (int i = 0; i < this.balls.size(); i++) {
//          this.balls.get(i-deleted).y += this.balls.get(i-deleted).inc_y * this.balls.get(i-deleted).speed;
//          this.balls.get(i-deleted).x += this.balls.get(i-deleted).inc_x * this.balls.get(i-deleted).speed;
//      }
        for(  ListIterator<Ball> a=balls.listIterator(); a.hasNext(); ) {
            Ball i = (Ball) a.next();

            if (checkCollision((float)i.x, (float)i.y,(float) i.image.getWidth(),(float)i.image.getHeight(),(float)screenW/2-10,(float)screenH/2-10,(float)20,(float)20)){
                a.remove();
                GameView.core.score++;

            }

            i.y += i.inc_y * i.speed;
            i.x += i.inc_x * i.speed;
        }
    }

}