Add second year
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273
second/semester2/CT255/Assignments/Assigment-09/AStarMaze.java
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273
second/semester2/CT255/Assignments/Assigment-09/AStarMaze.java
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import java.awt.*;
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import java.awt.event.*;
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import javax.swing.*;
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import java.awt.image.*;
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import java.io.*;
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public class AStarMaze extends JFrame implements Runnable, MouseListener, MouseMotionListener, KeyListener {
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// member data
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private static final Dimension WindowSize = new Dimension(800, 800);
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private boolean isInitialised = false;
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private BufferStrategy strategy;
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private Graphics offscreenBuffer;
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private static boolean map[][] = new boolean[40][40];
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private boolean isGameRunning = false;
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private BadGuy badguy;
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private Player player;
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private String FilePath;
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// constructor
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public AStarMaze() {
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setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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//Display the window, centred on the screen
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Dimension screensize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
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int x = screensize.width/2 - WindowSize.width/2; int y = screensize.height/2 - WindowSize.height/2;
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setBounds(x, y, WindowSize.width, WindowSize.height);
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setVisible(true);
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this.setTitle("A* Pathfinding Demo");
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FilePath = System.getProperty("user.dir") + "/";
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// load raster graphics and instantiate game objects
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ImageIcon icon = new ImageIcon(FilePath+"badguy.png");
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Image img = icon.getImage();
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badguy = new BadGuy(img);
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icon = new ImageIcon(FilePath+"player.png");
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img = icon.getImage();
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player = new Player(img);
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// initialise double-buffering
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createBufferStrategy(2);
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strategy = getBufferStrategy();
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// create and start our animation thread
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Thread t = new Thread(this);
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t.start();
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// register the Jframe itself to receive mouse and keyboard events
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addMouseListener(this);
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addMouseMotionListener(this);
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addKeyListener(this);
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// initialise the map state
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for (x=0;x<40;x++) {
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for (y=0;y<40;y++) {
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map[x][y]=false;
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}
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}
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isInitialised = true;
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}
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// thread's entry point
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public void run() {
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long loops = 0;
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while (true) {
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// 1: sleep for 1/5 sec
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try {
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Thread.sleep(200);
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} catch (InterruptedException e) { }
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// 2: animate game objects
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if (isGameRunning) {
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loops++;
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player.move(map); // player moves every frame
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// recalculating the badguys path every move, highly inefficient but easier to program lol
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badguy.reCalcPath(map, player.x, player.y);
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if (loops%10==0) // badguy moves once every 3 frames
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badguy.move(map,player.x,player.y);
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}
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// 3: force an application repaint
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this.repaint();
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}
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}
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private void loadMaze() {
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String filename = FilePath+"maze.txt";
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String textinput = null;
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try {
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BufferedReader reader = new BufferedReader(new FileReader(filename));
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textinput = reader.readLine();
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reader.close();
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}
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catch (IOException e) { }
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if (textinput!=null) {
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for (int x=0;x<40;x++) {
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for (int y=0;y<40;y++) {
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map[x][y] = (textinput.charAt(x*40+y)=='1');
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}
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}
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}
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}
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private void saveMaze() {
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// pack maze into a string
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String outputtext="";
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for (int x=0;x<40;x++) {
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for (int y=0;y<40;y++) {
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if (map[x][y])
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outputtext+="1";
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else
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outputtext+="0";
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}
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}
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try {
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String filename = FilePath+"maze.txt";
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BufferedWriter writer = new BufferedWriter(new FileWriter(filename));
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writer.write(outputtext);
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writer.close();
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}
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catch (IOException e) { }
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}
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// mouse events which must be implemented for MouseListener
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public void mousePressed(MouseEvent e) {
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if (!isGameRunning) {
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// was the click on the 'start button'?
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int x = e.getX();
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int y = e.getY();
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if (x>=15 && x<=85 && y>=40 && y<=70) {
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isGameRunning=true;
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return;
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}
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// or the 'load' button?
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if (x>=315 && x<=385 && y>=40 && y<=70) {
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loadMaze();
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return;
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}
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// or the 'save' button?
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if (x>=415 && x<=485 && y>=40 && y<=70) {
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saveMaze();
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return;
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}
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}
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// determine which cell of the gameState array was clicked on
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int x = e.getX()/20;
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int y = e.getY()/20;
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// toggle the state of the cell
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map[x][y] = !map[x][y];
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// throw an extra repaint, to get immediate visual feedback
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this.repaint();
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// store mouse position so that each tiny drag doesn't toggle the cell
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// (see mouseDragged method below)
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prevx=x;
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prevy=y;
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}
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public void mouseReleased(MouseEvent e) {}
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public void mouseEntered(MouseEvent e) {}
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public void mouseExited(MouseEvent e) {}
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public void mouseClicked(MouseEvent e) {}
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//
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// mouse events which must be implemented for MouseMotionListener
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public void mouseMoved(MouseEvent e) {}
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// mouse position on previous mouseDragged event
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// must be member variables for lifetime reasons
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int prevx=-1, prevy=-1;
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public void mouseDragged(MouseEvent e) {
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// determine which cell of the gameState array was clicked on
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// and make sure it has changed since the last mouseDragged event
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if (e.getX() < 800 && e.getX() >= 0 && e.getY() < 800 && e.getY() >= 0) {
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int x = e.getX()/20;
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int y = e.getY()/20;
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if (x!=prevx || y!=prevy) {
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// toggle the state of the cell
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map[x][y] = !map[x][y];
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// throw an extra repaint, to get immediate visual feedback
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this.repaint();
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// store mouse position so that each tiny drag doesn't toggle the cell
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prevx=x;
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prevy=y;
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}
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}
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badguy.reCalcPath(map, player.x, player.y);
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}
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// Keyboard events
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public void keyPressed(KeyEvent e) {
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if (e.getKeyCode()==KeyEvent.VK_LEFT)
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player.setXSpeed(-1);
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else if (e.getKeyCode()==KeyEvent.VK_RIGHT)
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player.setXSpeed(1);
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else if (e.getKeyCode()==KeyEvent.VK_UP)
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player.setYSpeed(-1);
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else if (e.getKeyCode()==KeyEvent.VK_DOWN)
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player.setYSpeed(1);
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}
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public void keyReleased(KeyEvent e) {
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if (e.getKeyCode()==KeyEvent.VK_LEFT || e.getKeyCode()==KeyEvent.VK_RIGHT)
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player.setXSpeed(0);
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else if (e.getKeyCode()==KeyEvent.VK_UP || e.getKeyCode()==KeyEvent.VK_DOWN)
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player.setYSpeed(0);
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}
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public void keyTyped(KeyEvent e) { }
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// application's paint method
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public void paint(Graphics g) {
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if (!isInitialised)
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return;
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// g = offscreenBuffer; // draw to offscreen buffer
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g = strategy.getDrawGraphics();
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// clear the canvas with a big black rectangle
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g.setColor(Color.BLACK);
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g.fillRect(0, 0, 800, 800);
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// redraw the map
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g.setColor(Color.WHITE);
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for (int x=0;x<40;x++) {
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for (int y=0;y<40;y++) {
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if (map[x][y]) {
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g.fillRect(x*20, y*20, 20, 20);
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}
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}
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}
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// redraw the player and badguy
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// paint the game objects
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player.paint(g);
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badguy.paint(g);
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if (!isGameRunning) {
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// game is not running..
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// draw a 'start button' as a rectangle with text on top
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// also draw 'load' and 'save' buttons
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g.setColor(Color.GREEN);
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g.fillRect(15, 40, 70, 30);
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g.fillRect(315, 40, 70, 30);
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g.fillRect(415, 40, 70, 30);
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g.setFont(new Font("Times", Font.PLAIN, 24));
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g.setColor(Color.BLACK);
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g.drawString("Start", 22, 62);
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g.drawString("Load", 322, 62);
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g.drawString("Save", 422, 62);
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}
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// flip the buffers
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strategy.show();
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}
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// application entry point
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public static void main(String[] args) {
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AStarMaze w = new AStarMaze();
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}
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}
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