Applet Orchard

Java Game Development #4 – Starting Some Buffers

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In this video we learn how to start buffering our game and having our Graphics variable available so we can start drawing stuff onto the screen. If you have any questions then be sure to leave a comment or contact me on twitter; realtutsgml. If you learned something then be sure to leave a like, comment, and favorite.

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25 responses to “Java Game Development #4 – Starting Some Buffers”

  1. Laser Bean Avatar
    Laser Bean

    Mine averages 500fps. lol.

    Reply
  2. dongs sanchez Avatar
    dongs sanchez

    so ur saying is less bufferstrategy would make the buffer slower but makes the game load faster?

    Reply
  3. Lordense Avatar
    Lordense

    It don't recognize image by the g.drawImage. It says I have to create an variable for it.

    Reply
  4. Kamal Ahmad Avatar
    Kamal Ahmad

    can I use this buff strategy on jpane?

    Reply
  5. Eli Holst Avatar
    Eli Holst

    im getting an error. java.awt.Canvas.createBufferStrategy(Unknown Source)

    Reply
  6. Xblazer 101 Avatar
    Xblazer 101

    um…. the buffersrategy thing gives me an error… can someone help me pls?

    Reply
  7. kindpotato Avatar
    kindpotato

    Do you really need to create a new buffer stategy everytime you call render. Also, why would you call render so many times between updating. Seems pointless if nothing has moved.

    Reply
  8. Silas Mcfarlane Avatar
    Silas Mcfarlane

    Hey +RealTutsGML When you do a private coding lesson session, does it cost money and would we use skype or something?

    Reply
  9. Edward Langstrand Avatar
    Edward Langstrand

    Im getting orgasms from this because i have been doing things unclearly and stupid for three years… <3 Thanks alot ^^

    Reply
  10. Nevin Rhymer Avatar
    Nevin Rhymer

    my fps is around 9000 after the drop

    Reply
  11. Timo Steinert Avatar
    Timo Steinert

    BufferStrategy bs = new this.getBufferStrategy(); does not work.

    Reply
  12. Kepler Avatar
    Kepler

    HELP PLEASE

    Exception in thread "Thread-2" java.lang.IllegalStateException: Component must have a valid peer
    at java.awt.Component$FlipBufferStrategy.createBuffers(Component.java:3998)
    at java.awt.Component$FlipBufferStrategy.<init>(Component.java:3972)
    at java.awt.Component$FlipSubRegionBufferStrategy.<init>(Component.java:4495)
    at java.awt.Component.createBufferStrategy(Component.java:3849)
    at java.awt.Canvas.createBufferStrategy(Canvas.java:194)
    at java.awt.Component.createBufferStrategy(Component.java:3773)
    at java.awt.Canvas.createBufferStrategy(Canvas.java:169)
    at com.game.src.main.Game.render(Game.java:89)
    at com.game.src.main.Game.run(Game.java:69)
    at java.lang.Thread.run(Thread.java:745)

    Reply
  13. Notorious Avatar
    Notorious

    for some reason my game screen seems smaller than yours can someone help me?

    Reply
  14. Darragh Walsh Avatar
    Darragh Walsh

    what would happen if i changed the 3 to a 12? (4:50)

    Reply
  15. Fedegas Avatar
    Fedegas

    Amazing videos, man!

    Thanks alot

    Reply
  16. RestLess PvP Avatar
    RestLess PvP

    If your lazy xD
                    package com.game.src.main;

    import java.awt.Canvas;
    import java.awt.Dimension;
    import java.awt.image.BufferStrategy;
    import java.awt.image.BufferedImage;

    import javax.swing.JFrame;

    public class Game extends Canvas implements Runnable {

    private static final long serialVersionUID = 1L;
    public static final int WIDTH = 320;
    public static final int HEIGHT = WIDTH / 12 * 9;
    public static final int SCALE = 2;
    public final String TITLE = "2D Space game";

    private boolean running = false;
    private Thread thread;

    private BufferedImage image = new BufferedImage(WIDTH,HEIGHT,BufferedImage.TYPE_INT_RGB); 

    private synchronized void start(){
    if(running)
    return;

    running = true;
    thread = new Thread(this);
    thread.start();
    }

    private synchronized void stop(){
    if (!running)
    return;

    running = false;
    try {
    thread.join();
    } catch (InterruptedException e) {
    e.printStackTrace();
    }
    System.exit(1);
    }

    public void run(){
    long lastTime = System.nanoTime();
    final double amountOfTicks = 60.0;
    double  ns = 1000000000 / amountOfTicks;
    double delta = 0;
    int updates = 0;
    int frames = 0;
    long timer = System.currentTimeMillis();
    while(running){
    long now = System.nanoTime();
    delta += (now – lastTime) / ns;
    lastTime = now;
    if(delta >= 1){
    tick();
    updates++;
    delta–;
    }
    render();
    frames++;

    if(System.currentTimeMillis() – timer > 1000){
    timer += 1000;
    System.out.println(updates + " Ticks, Fps " + frames);
    updates = 0;
    frames = 0;
    }

    }
    stop();
    }

    private void tick(){

    }

    private void render(){

    BufferStrategy bs = this.getBufferStrategy();

    }

    public static void main (String args[]){
    Game game = new Game();

    game.setPreferredSize(new Dimension(WIDTH * SCALE, HEIGHT * SCALE));
    game.setMaximumSize(new Dimension(WIDTH * SCALE, HEIGHT * SCALE));
    game.setMinimumSize(new Dimension(WIDTH * SCALE, HEIGHT * SCALE));

    JFrame frame = new JFrame(game.TITLE);
    frame.add(game);
    frame.pack();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);;
    frame.setResizable(false);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);

    game.start();
    }

    }

    Reply
  17. Jose Dominguez Avatar
    Jose Dominguez

    I got an error message on line 20.
    Game.java:20: cannot find symbol
    Referring to the "BufferedImage" part. Any idea what I missed?

    Reply
  18. ArcMaster Avatar
    ArcMaster

    Error: Main method not found in class com.game.src.main.game, please
    define the main method as:
    public static void main(String[] args)
    or a JavaFX application class must extend javafx.application.Application

    Help Please

    Reply
  19. Joe Aston Avatar
    Joe Aston

    I got around 2000 FPS after create loop, and now my FPS drop to +/- 800

    Reply
  20. Nhaselton Avatar
    Nhaselton

    This code is just like DesignsbyZephyr's Tutorial. maybe you should credit him

    Reply
  21. Adam Hill Avatar
    Adam Hill

    At the end the 

    g.drawImage(image, 0, 0, getWidth(), getHeight(), this);

    Don't remove it if you have bad eye sight, it will cause tons of flash and cause headaches if you look at it for too long!!! 

    Warning!

    Reply
  22. Stackersaurus Avatar
    Stackersaurus

    wierd, I don't get a black screen, pls help

    Reply
  23. Elias L Avatar
    Elias L

    To clear the screen every frame, should i use g.clearRect or just drawImage?

    Reply
  24. Sarkhamy Avatar
    Sarkhamy

    For some reason it says that BufferedImage doesn't exist. I imported it: import java.awt.*. but it won't load Buffer Image or Buffer strategy.

    Reply
  25. Robert Langford Avatar
    Robert Langford

    anyone's actual program screen not show? RSVP x

    Reply

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