How to check for boundary conditions
package com.codegym.task.task22.task2213;
import java.awt.event.KeyEvent;
/**
* The Tetris class contains the basic functionality of the game.
*/
public class Tetris {
private Field field; // Game field
private GamePiece gamePiece; // Game piece
private boolean isGameOver; // Indicates whether the game is over
public Tetris(int width, int height) {
field = new Field(width, height);
gamePiece = null;
}
/**
* Getter for the field variable.
*/
public Field getField() {
return field;
}
/**
* Getter for the gamePiece variable.
*/
public GamePiece getGamePiece() {
return gamePiece;
}
/**
* The program's main loop.
* This is where all the important actions happen
*/
public void run() throws Exception {
// Create a KeyboardObserver object and start it.
KeyboardObserver keyboardObserver = new KeyboardObserver();
keyboardObserver.start();
// Set the initial value of isGameOver to false
isGameOver = false;
// Create the first game piece in the middle at the top: x = half of the width, y = 0.
gamePiece = GamePieceFactory.createRandomGamePiece(field.getWidth()/2, 0);
// The game is not over yet
while (!isGameOver) {
// Does the observer have any key events?
if (keyboardObserver.hasKeyEvents()) {
// Get the first event from the queue
KeyEvent event = keyboardObserver.getEventFromTop();
// If 'q', then exit the game.
if (event.getKeyChar() == 'q') return;
// If "left arrow", then move the game piece to the left
if (event.getKeyCode() == KeyEvent.VK_LEFT)
gamePiece.left();
// If "right arrow", then move the game piece to the right
else if (event.getKeyCode() == KeyEvent.VK_RIGHT)
gamePiece.right();
// If the key code is 12 ("5 on the numeric keypad), rotate the game piece
else if (event.getKeyCode() == 12)
gamePiece.rotate();
// If it's a space, then drop the game piece at top speed
else if (event.getKeyCode() == KeyEvent.VK_SPACE)
gamePiece.downMaximum();
}
step(); // Take a step
field.print(); // Display the field
Thread.sleep(300); // Pause 300 milliseconds (about 1/3 of a second)
}
// Display "Game Over"
System.out.println("Game Over");
}
public void step() {
// Drop the game piece lower
gamePiece.down();
// If the game piece can't be placed in the current location
if (!gamePiece.isCurrentPositionAvailable()) {
gamePiece.up(); // Put it back
gamePiece.land(); // Land it
isGameOver = gamePiece.getY () <= 1; // If the game piece lands at the very top, then the game is over
field.removeFullLines(); // Remove the completed lines
gamePiece = GamePieceFactory.createRandomGamePiece(field.getWidth()/2, 0); // Create a new game piece
}
}
/**
* Setter for gamePiece
*/
public void setGamePiece(GamePiece gamePiece) {
this.gamePiece = gamePiece;
}
/**
* Setter for field
*/
public void setField(Field field) {
this.field = field;
}
public static Tetris game;
public static void main(String[] args) throws Exception {
game = new Tetris(10, 20);
game.run();
}
}