// MicroNibbles - Nibbles in 150 Zeilen - (C)2002 Jörg Mensmann import java.awt.*; import java.awt.event.*; import java.awt.image.PixelGrabber; public class MicroNibbles extends java.applet.Applet implements Runnable, KeyListener { Thread thread = null; // Timer-Thread Image offscreen, backgroundimg; // Bitmaps Graphics offgraphics; // Backbuffer-Graphic Font bigFont, mediumFont, smallFont; // Schriftarten int direction, snake_len, snake_num, counter = 0, level = 1; boolean inGame, showCrash, hasWon, gameOver; // Spiellogik int[] snake_x, snake_y; // Positionen der Einzelteile der Schlange int[][] field; // Spielfeld final int FeldX = 64, FeldY = 40, // Größe der Spielfeldes EMPTY = 0, OBSTACLE = 1, SNAKE = 2, NUMBER = 3, // für Spielfeld NORTH = 0, EAST = 1, SOUTH = 2, WEST = 3; // Richtungen public void init() { backgroundimg = getImage(getDocumentBase(), getParameter("bg")); bigFont = new Font("TimesRoman,Times", Font.BOLD, 30); mediumFont = new Font("TimesRoman,Times", 0, 20); smallFont = new Font("Courier New,Courier,Helvetica", 0, 15); snake_x = new int[70]; snake_y = new int[70]; field = new int[FeldX + 1][FeldY + 1]; addKeyListener(this); } public void start() { if (thread == null) { thread = new Thread(this); thread.start(); } } public void stop() { thread = null; } public void run() { // Run-Methode des Thread while (thread != null) { try { Thread.sleep(80); } catch (InterruptedException e){} counter++; if (inGame) moveSnake(); repaint(); } thread = null; } void newNumber() { // Zahl irgendwo auf dem Spielfeld einfügen int x, y; do { x = (int)(Math.random() * (FeldX - 2)) + 1; y = (int)(Math.random() * (FeldY - 2)) + 1; } while (GetField(x, y) != EMPTY); // Leeres Feld suchen SetField(x, y, NUMBER); } int GetField(int x, int y) { return field[x][y]; } void SetField(int x, int y, int w) { field[x][y] = w; } void moveSnake() { SetField(snake_x[snake_len], snake_y[snake_len], EMPTY); // Ende der Schlange entfernen for (int i=snake_len; i >= 2; i--) { // Positionen weitersetzen snake_x[i] = snake_x[i - 1]; snake_y[i] = snake_y[i - 1]; } switch (direction) { // Kopf neu setzen bzw. Crash case NORTH: if (snake_y[1] > 0) snake_y[1]--; else crash(); break; case EAST: if (snake_x[1] < FeldX - 1) snake_x[1]++; else crash(); break; case SOUTH: if (snake_y[1] < FeldY - 1) snake_y[1]++; else crash(); break; case WEST: if (snake_x[1] > 0) snake_x[1]--; else crash(); break; } if (GetField(snake_x[1], snake_y[1]) == NUMBER) { // Nummer? if (--snake_num < 1) { // Level gewonnen? inGame = !(hasWon = true); gameOver = (getParameter("level" + (++level)) == null); if (gameOver) level = 1; } else { newNumber(); // Neue Nummer und Länge der Schlange erhöhen for (int i=snake_len + 1; i <= (snake_len + 10 - snake_num); i++) { snake_x[i] = snake_x[snake_len]; snake_y[i] = snake_y[snake_len]; } snake_len += 10 - snake_num; } } if ((GetField(snake_x[1], snake_y[1]) != EMPTY) && (GetField(snake_x[1], snake_y[1]) != NUMBER)) crash(); else SetField(snake_x[1], snake_y[1], SNAKE); } void crash () { showCrash = true; inGame = false; } public synchronized void update(Graphics g) { if (offscreen == null) { // Erster Durchlauf -> Backbuffer erzeugen offscreen = createImage(getSize().width, getSize().height); offgraphics = offscreen.getGraphics(); } offgraphics.drawImage(backgroundimg, 0, 0, null); // Hintergrund if ((inGame) || (showCrash)) { offgraphics.setColor(Color.red); for (int x=0; x <= FeldX; x++) // Hindernisse for (int y=0; y <= FeldY; y++) if (GetField(x, y) == OBSTACLE) offgraphics.fillRect(x*10, y*10, 10, 10); if (!showCrash || counter % 2 == 0) { // Wenn gecrashed dann blinkend darstellen offgraphics.setColor(Color.green); for (int x=0; x <= FeldX; x++) // Schlange for (int y=0; y <= FeldY; y++) if (GetField(x, y) == SNAKE) offgraphics.fillRect(x*10, y*10, 10, 10); } offgraphics.setFont(smallFont); offgraphics.setColor(Color.white); for (int x=0; x <= FeldX; x++) // Zahl for (int y=0; y <= FeldY; y++) if (GetField(x, y) == NUMBER) offgraphics.drawString("" + snake_num, x*10, y*10 + 10); } if (!inGame) { // Nicht im Spiel -> Text anzeigen offgraphics.setColor(Color.black); offgraphics.setFont(bigFont); offgraphics.drawString("MicroNibbles", 10, 35); offgraphics.setColor(Color.blue); offgraphics.setFont(bigFont); if (counter % 2 == 0 && showCrash) offgraphics.drawString("Crash!", 10, 75); else if ((counter / 7) % 2 == 0 && hasWon) offgraphics.drawString(gameOver ? "You win! - Game Over" : "Level complete!", 10, 75); offgraphics.setFont(mediumFont); offgraphics.drawString("Press SPACE to begin!", 10, 120); } g.drawImage(offscreen, 0, 0, null); // Backbuffer auf den Screen } public void keyPressed(KeyEvent e) { if (!inGame) { if (e.getKeyCode() == KeyEvent.VK_SPACE) initGame(); } else switch (e.getKeyCode()) { case KeyEvent.VK_UP: if (direction != SOUTH) direction = NORTH; break; case KeyEvent.VK_DOWN: if (direction != NORTH) direction = SOUTH; break; case KeyEvent.VK_RIGHT: if (direction != WEST) direction = EAST; break; case KeyEvent.VK_LEFT: if (direction != EAST) direction = WEST; break; } } public void keyTyped(KeyEvent e) { } public void keyReleased(KeyEvent e) { } void initGame() { int[] pixels = new int[FeldX * FeldY]; Image levelimg = getImage(getDocumentBase(), getParameter("level" + level)); PixelGrabber pg = new PixelGrabber(levelimg, 0, 0, FeldX, FeldY, pixels, 0, FeldX); try { pg.grabPixels(); } catch (InterruptedException e) { } for (int x=0; x < FeldX; x++) // Level wird abhängig von for (int y=0; y < FeldY; y++) // der Level-Grafik aufgebaut SetField(x, y, (pixels[x + y*FeldX] != pixels[0]) ? OBSTACLE : EMPTY); direction = 1; snake_num = 9; snake_len = 6; for (int i=1; i <= snake_len; i++) { snake_x[i] = 20 - i; snake_y[i] = 4; SetField(20 - i, 4, SNAKE); } newNumber(); inGame = !(showCrash = hasWon = gameOver = false); } }