I want to create a game similar to SpaceInvaders, but instead of getting to the bottom of the screen, the aliens shoot projectiles. One type of aliens I wanted to create(in the code below), turns to 45 degree and back. I tried it with affine transform, but everytime they turn the game slows down to half of the speed. The player and the projectiles are moving at half the speed then. The code below is the class that creates a JPanel and draws everything.
import javax.swing.Timer;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.*;
import java.util.*;
import javax.swing.JPanel;
import javax.imageio.*;
import java.awt.image.BufferedImage;
import java.net.URL;
import java.io.IOException;
import javax.swing.*;
public class WELTZEICHNER2 extends JPanel implements ActionListener ,
KeyListener
{
Player p;
Timer t = new Timer (5, this);
ArrayList<ANGRIFF> ziele = new ArrayList<ANGRIFF>();
ArrayList<ANGRIFF> ziele2 = new ArrayList<ANGRIFF>();
ArrayList<ALIEN1> aliens1 = new ArrayList<ALIEN1>();
private boolean left,right,space;
private int lastshot = 100;
private int score =0;
BufferedImage image;
BufferedImage image2;
BufferedImage image3;
BufferedImage image4;
int count = 0;
int count2 = 0;
int d = 0;
public WELTZEICHNER2()
{
setDoubleBuffered(true);
p = new Player(500,900,100000);
t.start();
addKeyListener(this);
setFocusable(true);
URL resource = getClass().getResource("alien2.png");
URL resource2 = getClass().getResource("background.png");
URL resource3 = getClass().getResource("raumschifftest.png");
URL resource4 = getClass().getResource("kreislertest.png");
try {
image = ImageIO.read(resource);
} catch (IOException e) {
e.printStackTrace();
}
try {
image2 = ImageIO.read(resource2);
} catch (IOException e) {
e.printStackTrace();
}
try {
image3 = ImageIO.read(resource3);
} catch (IOException e) {
e.printStackTrace();
}
try {
image4 = ImageIO.read(resource4);
} catch (IOException e) {
e.printStackTrace();
}
for (int i= 0;i < 20;i++)
{
for (int j =0;j <5;j++)
{
aliens1.add(new ALIEN1(70+i*90,80+j*70,1));
}
}
}
public void erzeugeANGRIFF()
{
ANGRIFF b = new ANGRIFF(p.getxN() + 11, p.getyN(),true);
ziele2.add(b);
}
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g.drawImage(image2,1,1,this); //background image
g.drawImage(image3,p.getxN(),p.getyN(),this); //player image
for (ANGRIFF b : ziele)
{
g2.setColor(Color.RED);
g2.fill( new Ellipse2D.Double(b.getxN(),b.getyN(),5,10)); //alien´s projectiles
}
for (ANGRIFF b : ziele2)
{
g2.setColor(Color.GREEN);
g2.fill( new Ellipse2D.Double(b.getxN(),b.getyN(),5,10)); // player´s projectiles
}
for (ALIEN1 i : aliens1) //draw alien images
{
if(count2 > 10000)
{
AffineTransform trans = new AffineTransform();
trans.rotate(Math.toRadians(45), image4.getWidth() / 2, image4.getHeight() / 2);
BufferedImage rotated = new BufferedImage(image4.getWidth(),
image4.getHeight(), BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D g3 = rotated.createGraphics();
g3.drawImage(image4, trans, null);
g2.drawImage(rotated,i.getxN(),i.getyN(),null);
}
else
{
g.drawImage(image4,i.getxN(),i.getyN(),this);
}
}
g2.setColor(Color.RED);
g2.drawString("Score:"+ score,5,15);
g2.drawString("Health:"+ p.health,5,30);
g2.drawString("Count:"+ count,5,45);
if(p.health == 0) //Game Over screen
{
g2.setColor(Color.BLACK);
g2.fill(new Rectangle2D.Double(1,1,1920,1080));
g2.setColor(Color.RED);
String text = "Game Over";
Font endtext = new Font("TimesNewRoman",Font.PLAIN, 200 );
g2.setFont(endtext);
g2.drawString(text,450,540);
}
}
public void actionPerformed(ActionEvent e)
{
if ( right == true)
{
p.right();
}
if (left == true)
{
p.left();
}
if(space == true && lastshot < 0)
{
erzeugeANGRIFF();
lastshot = 100;
}
lastshot -=1;
int bulletCount =ziele.size();
int bulletCount2 =ziele2.size();
int Alien1Count = aliens1.size();
ArrayList<Integer> remANGRIFF= new ArrayList<Integer>();
ArrayList<Integer> remANGRIFF2= new ArrayList<Integer>();
ArrayList<Integer>remAlien1=new ArrayList<Integer>();
for( int i = 0; i < bulletCount2;i++)
{
ANGRIFF b = ziele2.get(i);
b.bewegeANGRIFF();
if (b.getyN() >1000 )
{
remANGRIFF2.add(i);
}
for (int j =0;j< Alien1Count;j++ )
{
ALIEN1 n = aliens1.get(j);
if (b.checkCollision(n) && b.player == true)
{
n.health -=1;
score +=50;
if (n.health <= 0)
{
remAlien1.add(j);
score +=100;
}
remANGRIFF2.add(i);
}
}
}
for( int i = 0; i < bulletCount;i++)
{
ANGRIFF b = ziele.get(i);
b.bewegeANGRIFF();
if (b.getyN() < -100 )
{
remANGRIFF.add(i);
}
if (b.checkCollision(p) && b.player == false)
{
p.health -=50;
if (p.health <= 0)
{
p.health = 0;
}
remANGRIFF.add(i);
}
}
for (ALIEN1 i : aliens1)
{
// i.Bewegungsmuster();
count2++;
if(count2 > 20000)
{
count2 = 0;
}
if (i.newANGRIFF())
{
ziele.add(new ANGRIFF(i.getxN()+50,i.getyN()+50,false));
}
}
for (int i: remANGRIFF)
{
if(i < ziele.size())
{
ziele.remove(i);
}
}
for (int i: remANGRIFF2)
{
if(i < ziele2.size())
{
ziele2.remove(i);
}
}
for (int i: remAlien1)
{
if (i<aliens1.size())
{
aliens1.remove(i);
}
}
repaint();
}
public void keyPressed(KeyEvent e)
{
int code = e.getKeyCode();
if ( code == KeyEvent.VK_RIGHT)
{
right = true;
}
if ( code == KeyEvent.VK_LEFT)
{
left = true;
}
if ( code == KeyEvent.VK_SPACE)
{
space = true;
}
}
public void keyReleased(KeyEvent e)
{
int code = e.getKeyCode();
if ( code == KeyEvent.VK_RIGHT)
{
right = false;
}
if ( code == KeyEvent.VK_LEFT)
{
left = false;
}
if ( code == KeyEvent.VK_SPACE)
{
space = false;
lastshot =0;
}
}
public void keyTyped(KeyEvent e)
{
int code = e.getKeyCode();
if ( code == KeyEvent.VK_SPACE)
{
erzeugeANGRIFF();
}
}
}
This is the class that starts the game.
import javax.swing.*;
public class start
{
public static void main(String[] args)
{
//System.setProperty("sun.java2d.d3d", "true");
//System.setProperty("sun.java2d.noddraw", "false");
//-Dsun.java2d.noddraw=false;
JFrame f = new JFrame();
WELTZEICHNER2 d = new WELTZEICHNER2();
f.setSize(1920,1080);
f.setTitle("BlueJ Space Invader");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(d);
f.setVisible(true);
}
}
Any help is appreciated.
