Java 2D 贪吃蛇游戏项目源码

import javafx.animation.Animation; import javafx.animation.KeyFrame; import javafx.animation.Timeline; import javafx.util.Duration; import java.util.ArrayList; import java.util.Random; public class AI extends Player { Timeline timer; Food food; ArrayList<Player> players; //boolean foodIsUp, foodIsRight; public AI(int stepSize, String colour, int playerNum, ArrayList<Player> players) { super(stepSize, colour, playerNum); this.players = players; // randomAI(); } public int findFoodDirectionY() { SnakePiece head = getSnake().getFirst(); if(food.getPosY() != head.getPosY()) { if(head.getPosY() - food.getPosY() < 0) { // negative ; go down return 1; } else { // positive; go up return 0; } } else { // return -1 means it is on the correct axis already return -1; } } public int findFoodDirectionX() { SnakePiece head = getSnake().getFirst(); if(food.getPosX() != head.getPosX()) { if(head.getPosX() - food.getPosX() < 0) { // negative; go right return 2; } else { // positive; go left return 3; } } else { // return -1 means it is on the correct axis already return -1; } } public void timerTick() { if(!wallCollisionDetection()) { // continue with whatever direction the wallCollisionDetection() set if it was true if(!snakeCollisionDetection()) { int directionX = findFoodDirectionX(); if(directionX == -1) { turn(findFoodDirectionY()); } else { turn(directionX); } } } } public boolean snakeCollisionDetection() { SnakePiece head = getSnake().getFirst(); int direction = getSnake().getDirection(); int[] result = expectedPosition(head.getPosX(), head.getPosY(), direction); int newPosX = result[0]; int newPosY = result[1]; for (Player checkee : players) { if (checkee.snake.getAlive()) { for (SnakePiece piece : checkee.snake) { if (!head.equals(piece)) { // make sure it isn't colliding with its own head... if (newPosX == piece.getPosX() && newPosY == piece.getPosY()) { // they may collide; take evasive action if(direction == 2 || direction == 3) { // move up or down turn(findFoodDirectionY()); } else { // move left or right turn(findFoodDirectionX()); } return true; } } } } } return false; } private int[] expectedPosition(int currentPosX, int currentPosY, int direction) { int increment = 10; int newPosX = 0; int newPosY = 0; switch(direction) { case 0: newPosY = currentPosY - increment; newPosX = currentPosX; break; case 1: newPosY = currentPosY + increment; newPosX = currentPosX; break; case 2: newPosX = currentPosX + increment; newPosY = currentPosY; break; case 3: newPosX = currentPosX - increment; newPosY = currentPosY; break; default: break; } int[] result = {newPosX, newPosY}; return result; } public boolean wallCollisionDetection() { int currentDirection = getSnake().getDirection(); int posX = getSnake().getFirst().getPosX(); int posY = getSnake().getFirst().getPosY(); if((posX == 390 && currentDirection == 2) || (posX == 10 && currentDirection == 3)) { // about to smash into wall // need to move up or down getSnake().setDirection(0); // at least try to go up turn(findFoodDirectionY()); return true; } else if ((posY == 390 && currentDirection == 1) || (posY == 10 && currentDirection == 0)) { // need to move left or right getSnake().setDirection(3); turn(findFoodDirectionX()); return true; } else { return false; } } public void turn(int newDirection) { // 0 = up; 1 = down; 2 = right; 3 = left int oldDirection = getSnake().getDirection(); switch(newDirection) { case 0: // up if(oldDirection != 0) { // not already up if(oldDirection == 1) { // down - need to move on X axis first instead turn(findFoodDirectionX()); } else { // left or right getSnake().setDirection(0); } } break; case 1: // down if(oldDirection != 1) { // not already down if(oldDirection == 0) { // up - need to move on X axis first instead turn(findFoodDirectionX()); } else { // left or right getSnake().setDirection(1); } } break; case 2: // right if(oldDirection != 2) { // not already right if(oldDirection == 3) { // left - need to move on Y axis first instead turn(findFoodDirectionY()); } else { // up or down getSnake().setDirection(2); } } break; case 3: // left if(oldDirection != 3) { // not already left if (oldDirection == 2) { // right - need to move on Y axis first instead turn(findFoodDirectionY()); } else { // up or down getSnake().setDirection(3); } } break; } } public void randomAI() { timer = new Timeline((new KeyFrame( Duration.millis(100), event -> randomAITimerTick()))); timer.setCycleCount(Animation.INDEFINITE); timer.play(); } public void randomAITimerTick() { Random rng = new Random(); snake.setDirection(rng.nextInt(3)); } public Food getFood() { return food; } public void setFood(Food food) { this.food = food; } }