Hello,
I’ve made a little changes to the game am working on, and now it’s like this ;
-move with arrow keys
-gun rotate toward mouse
-shoot bullet
now the problem is the bullets doesn’t go to the correct target, plus, they all rotate together, even after the bullet is shot it still change the x and y direction
my board class :
package clickOfGod;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.util.ArrayList;
import javax.swing.JPanel;
public class Board extends JPanel implements Runnable {
// declaration
private Ship ship;
private Bullet bullet;
private Gun gun;
private Control mouse;
private Thread loop;
private ArrayList bullets;
public static int mx, my;
public static double angle;
// constructor
public Board() {
init();
setBackground(Color.lightGray);
setDoubleBuffered(true);
setFocusable(true);
addMouseListener(mouse);
addMouseMotionListener(mouse);
this.addKeyListener(mouse);
}
// initialisation
private void init() {
ship = new Ship();
bullet = new Bullet(0, 0, 0, 0);
gun = new Gun(0, 0);
bullets = gun.getBullets();
angle = 0;
mouse = new Control();
mx = 0;
my = 0;
loop = new Thread(this);
loop.start();
}
// painting
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
// drawing the ship
g2d.draw(ship.getBounds());
// rotating and drawing the gun
g2d.rotate(angle, gun.getX() + 5, gun.getY() + 60);
g2d.drawRect(gun.getX(), gun.getY(), gun.getW(), gun.getH());
// creating the bullets arrayList
ArrayList bs = gun.getBullets();
for (int i = 0; i < bs.size(); i++) {
Bullet tb = (Bullet) bs.get(i);
g2d.draw(tb.getBounds());
}
g.dispose();
}
// game logic
public void play() {
ship.move(); // moving the ship
gun.fire(50);// firing
// placing the gun in the middle of the ship
gun.setX(ship.getX() + ship.getW() / 3);
gun.setY(ship.getY() - ship.getH() / 2);
// calculating the angle rotation of the gun based on mouse coorindates
// (my,mx)
angle = Math.atan2(gun.getY() - my, gun.getX() - mx) - Math.PI / 2;
//moving or removing the bullets
ArrayList bs = gun.getBullets();
for (int i = 0; i < bs.size(); i++) {
Bullet tb = (Bullet) bs.get(i);
if (tb.getTravel()) {
tb.move(mx,my);
} else {
bs.remove(i);
}
}
}
// game loop
public void run() {
while (true) {
repaint();
play();
try {
loop.sleep(5);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
my bullet class :
package clickOfGod;
import java.awt.Rectangle;
public class Bullet {
private int x, y, width, height;
private boolean travel;
public Bullet(int x, int y, int w, int h) {
this.x = x;
this.y = y;
this.width = w;
this.height = h;
travel = true;
}
public void setX(int x) {
this.x = x;
;
}
public void setY(int y) {
this.y = y;
;
}
public int getX(){
return x;
}
public int getY(){
return y;
}
public Rectangle getBounds() {
return new Rectangle(x, y, width, height);
}
public boolean getTravel() {
return travel;
}
public void setTravel(boolean travel) {
this.travel = travel;
}
public void move(float tx, float ty) {
if (x != tx || y != ty) {
float dx = tx - x;
float dy = ty - y;
float len = (float) Math.sqrt(dx * dx + dy * dy);
if (len != 0) {
dx /= len;
dy /= len;
}
float speed = 2f;
dx *= speed;
dy *= speed;
x += dx;
y += dy;
travel = true;
} else {
travel = false;
}
}
}
my gun class
package clickOfGod;
import java.util.ArrayList;
public class Gun {
private int x, y, w, h, life;
private ArrayList bullets;
public Gun(int x, int h) {
define();
}
public void define() {
this.x = x;
this.y = y;
this.h = 60;
this.w = 10;
bullets = new ArrayList();
life = 0;
}
public int getX() {
return x;
}
public int getY() {
return y;
}
public void setX(int x) {
this.x = x;
}
public void setY(int y) {
this.y = y;
}
public int getW() {
return w;
}
public int getH() {
return h;
}
public ArrayList getBullets() {
return bullets;
}
public void fire(int load) {
life += 1;
if (life == load) {
bullets.add(new Bullet(x, y, 10, 10));
life = 0;
}
}
}
i think those are the only classes you need to understand my problem
thank you
