WeaponLib 3.0 Java Android (c) xerpi 2011

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

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

public class WeaponLib{
    Bitmap img;
    float time,w,h,c_time;
    LinkedList <Bullet> bullets = new LinkedList<Bullet>();
    int screenW,screenH;

    public WeaponLib(int screenW, int screenH, Bitmap img, float time){
        this.img = img;
        this.w = img.getWidth();
        this.h = img.getHeight();
        this.time = time;
        this.screenW = screenW;
        this.screenH = screenH;
    }
    public boolean checkCollision(Bullet bullet, float x, float y, float w, float h){
        if ( bullet.x >= x && bullet.x <= x+w && bullet.y >= y && bullet.y <= y+h){
            return true;
        }
        return false;
    }
    public boolean outOfScreen(Bullet bullet){
        if (bullet.x > this.screenW  || bullet.x < 0 || bullet.y > this.screenH || bullet.y < 0){
            return true;
        }
//      if (bullet.x > width  || bullet.x < 0 ){
//          bullet.inc_x *= -1;
//      }
//      if (bullet.y > height  || bullet.y < 0 ){
//          bullet.inc_y *= -1;
//      }
        return false;
    }
    public void blit(Canvas canvas, Paint paint, Bitmap img){
        synchronized(this){
            ListIterator<Bullet> a = bullets.listIterator();
            while(a.hasNext()) {
                Bullet i = (Bullet) a.next();
                canvas.save();
                canvas.rotate((float) Math.toDegrees(i.ang),i.x,i.y);
                canvas.drawBitmap(this.img,i.x,i.y,paint);
                canvas.restore();
            }
        }
    }
    public void move(){
        synchronized(this){
            this.c_time++;
            ListIterator<Bullet> a = bullets.listIterator();
            while(a.hasNext()) {
                Bullet i = (Bullet) a.next();
                if (outOfScreen(i) ){
                    a.remove();
                }
                i.y += i.inc_y * i.vel;
                i.x += i.inc_x * i.vel;
            }
        }
    }
    public boolean collison(float x, float y, float w, float h, boolean deadcollision){
        synchronized(this){
            this.c_time++;
            ListIterator<Bullet> a = bullets.listIterator();
            while(a.hasNext()) {
                Bullet i = (Bullet) a.next();
                if (checkCollision(i, x, y, w, h)){
                    if (deadcollision){
                        a.remove();
                    }
                    return true;
                }
            }
        }
        return false;
    }
    public void insertBullet(float vel, float x, float y, float ang){
        this.bullets.add(new Bullet(vel, x, y, ang));
    }
    public void shoot(float vel, float x, float y, float ang){
        synchronized(this){
            if (this.c_time >= this.time){
                this.bullets.add(new Bullet(vel, x, y, ang));
                this.c_time = 0;
            }
        }
    }
    public class Bullet{
        float vel,x,y,ang,inc_x,inc_y;
        public Bullet(float vel, float x, float y, float ang){
            this.vel = vel; this.x = x; this.y = y; this.ang = ang;
            this.inc_x = (float) Math.cos(ang);
            this.inc_y = (float) Math.sin(ang);
        }

    }
}