386 lines
8.2 KiB
JavaScript
386 lines
8.2 KiB
JavaScript
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var ctx;//2d画布
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var wallCtx;//地图画布
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var grassCtx;//草地画布
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var tankCtx;//坦克画布
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var overCtx;//结束画布
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var menu = null;//菜单
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var stage = null;//舞台
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var map = null;//地图
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var player1 = null;//玩家1
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var player2 = null;//玩家2
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var prop = null;
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var enemyArray = [];//敌方坦克
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var bulletArray = [];//子弹数组
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var keys = [];//记录按下的按键
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var crackArray = [];//爆炸数组
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var gameState = GAME_STATE_MENU;//默认菜单状态
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var level = 1;
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var maxEnemy = 20;//敌方坦克总数
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var maxAppearEnemy = 5;//屏幕上一起出现的最大数
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var appearEnemy = 0; //已出现的敌方坦克
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var mainframe = 0;
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var isGameOver = false;
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var overX = 176;
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var overY = 384;
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var emenyStopTime = 0;
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var homeProtectedTime = -1;
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var propTime = 300;
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$(document).ready(function(){
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initScreen();
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initObject();
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setInterval(gameLoop,20);
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});
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function initScreen(){
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var canvas = $("#stageCanvas");
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ctx = canvas[0].getContext("2d");
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canvas.attr({"width":SCREEN_WIDTH});
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canvas.attr({"height":SCREEN_HEIGHT});
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wallCtx = $("#wallCanvas")[0].getContext("2d");
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grassCtx = $("#grassCanvas")[0].getContext("2d");
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$("#wallCanvas").attr({"width":SCREEN_WIDTH});
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$("#wallCanvas").attr({"height":SCREEN_HEIGHT});
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$("#grassCanvas").attr({"width":SCREEN_WIDTH});
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$("#grassCanvas").attr({"height":SCREEN_HEIGHT});
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tankCtx = $("#tankCanvas")[0].getContext("2d");
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$("#tankCanvas").attr({"width":SCREEN_WIDTH});
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$("#tankCanvas").attr({"height":SCREEN_HEIGHT});
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overCtx = $("#overCanvas")[0].getContext("2d");
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$("#overCanvas").attr({"width":SCREEN_WIDTH});
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$("#overCanvas").attr({"height":SCREEN_HEIGHT});
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$("#canvasDiv").css({"width":SCREEN_WIDTH});
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$("#canvasDiv").css({"height":SCREEN_HEIGHT});
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$("#canvasDiv").css({"background-color":"#000000"});
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}
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function initObject(){
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menu = new Menu(ctx);
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stage = new Stage(ctx,level);
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map = new Map(wallCtx,grassCtx);
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player1 = new PlayTank(tankCtx);
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player1.x = 129 + map.offsetX;
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player1.y = 385 + map.offsetY;
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player2 = new PlayTank(tankCtx);
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player2.offsetX = 128; //player2的图片x与图片1相距128
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player2.x = 256 + map.offsetX;
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player2.y = 385 + map.offsetY;
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appearEnemy = 0; //已出现的敌方坦克
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enemyArray = [];//敌方坦克
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bulletArray = [];//子弹数组
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keys = [];//记录按下的按键
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crackArray = [];//爆炸数组
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isGameOver = false;
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overX = 176;
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overY = 384;
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overCtx.clearRect(0,0,SCREEN_WIDTH,SCREEN_HEIGHT);
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emenyStopTime = 0;
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homeProtectedTime = -1;
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propTime = 1000;
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}
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function gameLoop(){
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switch(gameState){
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case GAME_STATE_MENU:
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menu.draw();
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break;
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case GAME_STATE_INIT:
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stage.draw();
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if(stage.isReady == true){
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gameState = GAME_STATE_START;
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}
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break;
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case GAME_STATE_START:
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drawAll();
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if(isGameOver ||(player1.lives <=0 && player2.lives <= 0)){
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gameState = GAME_STATE_OVER;
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map.homeHit();
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PLAYER_DESTROY_AUDIO.play();
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}
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if(appearEnemy == maxEnemy && enemyArray.length == 0){
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gameState = GAME_STATE_WIN;
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}
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break;
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case GAME_STATE_WIN:
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nextLevel();
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break;
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case GAME_STATE_OVER:
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gameOver();
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break;
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}
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}
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$(document).keydown(function(e){
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switch(gameState){
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case GAME_STATE_MENU:
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if(e.keyCode == keyboard.ENTER){
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gameState = GAME_STATE_INIT;
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//只有一个玩家
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if(menu.playNum == 1){
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player2.lives = 0;
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}
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}else{
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var n = 0;
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if(e.keyCode == keyboard.DOWN){
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n = 1;
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}else if(e.keyCode == keyboard.UP){
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n = -1;
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}
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menu.next(n);
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}
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break;
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case GAME_STATE_START:
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if(!keys.contain(e.keyCode)){
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keys.push(e.keyCode);
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}
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//射击
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if(e.keyCode == keyboard.SPACE && player1.lives > 0){
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player1.shoot(BULLET_TYPE_PLAYER);
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}else if(e.keyCode == keyboard.ENTER && player2.lives > 0){
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player2.shoot(BULLET_TYPE_ENEMY);
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}else if(e.keyCode == keyboard.N){
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nextLevel();
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}else if(e.keyCode == keyboard.P){
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preLevel();
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}
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break;
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}
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});
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$(document).keyup(function(e){
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keys.remove(e.keyCode);
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});
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function initMap(){
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map.setMapLevel(level);;
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map.draw();
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drawLives();
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}
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function drawLives(){
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map.drawLives(player1.lives,1);
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map.drawLives(player2.lives,2);
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}
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function drawBullet(){
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if(bulletArray != null && bulletArray.length > 0){
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for(var i=0;i<bulletArray.length;i++){
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var bulletObj = bulletArray[i];
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if(bulletObj.isDestroyed){
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bulletObj.owner.isShooting = false;
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bulletArray.removeByIndex(i);
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i--;
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}else{
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bulletObj.draw();
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}
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}
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}
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}
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function keyEvent(){
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if(keys.contain(keyboard.W)){
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player1.dir = UP;
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player1.hit = false;
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player1.move();
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}else if(keys.contain(keyboard.S)){
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player1.dir = DOWN;
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player1.hit = false;
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player1.move();
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}else if(keys.contain(keyboard.A)){
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player1.dir = LEFT;
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player1.hit = false;
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player1.move();
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}else if(keys.contain(keyboard.D)){
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player1.dir = RIGHT;
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player1.hit = false;
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player1.move();
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}
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if(keys.contain(keyboard.UP)){
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player2.dir = UP;
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player2.hit = false;
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player2.move();
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}else if(keys.contain(keyboard.DOWN)){
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player2.dir = DOWN;
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player2.hit = false;
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player2.move();
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}else if(keys.contain(keyboard.LEFT)){
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player2.dir = LEFT;
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player2.hit = false;
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player2.move();
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}else if(keys.contain(keyboard.RIGHT)){
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player2.dir = RIGHT;
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player2.hit = false;
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player2.move();
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}
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}
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function addEnemyTank(){
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if(enemyArray == null || enemyArray.length >= maxAppearEnemy || maxEnemy == 0){
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return ;
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}
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appearEnemy++;
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var rand = parseInt(Math.random()*3);
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var obj = null;
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if(rand == 0){
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obj = new EnemyOne(tankCtx);
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}else if(rand == 1){
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obj = new EnemyTwo(tankCtx);
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}else if(rand == 2){
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obj = new EnemyThree(tankCtx);
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}
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obj.x = ENEMY_LOCATION[parseInt(Math.random()*3)] + map.offsetX;
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obj.y = map.offsetY;
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obj.dir = DOWN;
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enemyArray[enemyArray.length] = obj;
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//更新地图右侧坦克数
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map.clearEnemyNum(maxEnemy,appearEnemy);
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}
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function drawEnemyTanks(){
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if(enemyArray != null || enemyArray.length > 0){
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for(var i=0;i<enemyArray.length;i++){
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var enemyObj = enemyArray[i];
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if(enemyObj.isDestroyed){
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enemyArray.removeByIndex(i);
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i--;
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}else{
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enemyObj.draw();
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}
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}
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}
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if(emenyStopTime > 0){
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emenyStopTime --;
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}
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}
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function drawAll(){
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tankCtx.clearRect(0,0,SCREEN_WIDTH,SCREEN_HEIGHT);
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if(player1.lives>0){
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player1.draw();
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}
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if(player2.lives > 0){
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player2.draw();
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}
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drawLives();
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if(appearEnemy<maxEnemy){
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if(mainframe % 100 == 0){
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addEnemyTank();
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mainframe = 0;
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}
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mainframe++;
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}
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drawEnemyTanks();
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drawBullet();
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drawCrack();
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keyEvent();
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if(propTime<=0){
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drawProp();
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}else{
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propTime --;
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}
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if(homeProtectedTime > 0){
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homeProtectedTime --;
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}else if(homeProtectedTime == 0){
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homeProtectedTime = -1;
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homeNoProtected();
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}
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}
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function drawCrack(){
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if(crackArray != null && crackArray.length > 0){
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for(var i=0;i<crackArray.length;i++){
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var crackObj = crackArray[i];
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if(crackObj.isOver){
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crackArray.removeByIndex(i);
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i--;
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if(crackObj.owner == player1){
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player1.renascenc(1);
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}else if(crackObj.owner == player2){
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player2.renascenc(2);
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}
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}else{
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crackObj.draw();
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}
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}
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}
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}
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function gameOver(){
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overCtx.clearRect(0,0,SCREEN_WIDTH,SCREEN_HEIGHT);
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overCtx.drawImage(RESOURCE_IMAGE,POS["over"][0],POS["over"][1],64,32,overX+map.offsetX,overY+map.offsetY,64,32);
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overY -= 2 ;
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if(overY <= parseInt(map.mapHeight/2)){
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initObject();
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//只有一个玩家
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if(menu.playNum == 1){
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player2.lives = 0;
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}
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gameState = GAME_STATE_MENU;
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}
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}
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function nextLevel(){
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level ++;
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if(level == 22){
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level = 1;
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}
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//保存玩家数
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var old_player_num = menu.playNum;
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initObject();
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menu.playNum = old_player_num;
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//只有一个玩家
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if(menu.playNum == 1){
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player2.lives = 0;
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}
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stage.init(level);
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gameState = GAME_STATE_INIT;
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}
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function preLevel(){
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level --;
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if(level == 0){
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level = 21;
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}
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//保存玩家数
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var old_player_num = menu.playNum;
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initObject();
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menu.playNum = old_player_num;
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//只有一个玩家
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if(menu.playNum == 1){
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player2.lives = 0;
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}
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stage.init(level);
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gameState = GAME_STATE_INIT;
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}
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function drawProp(){
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var rand = Math.random();
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if(rand < 0.4 && prop == null){
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prop = new Prop(overCtx);
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prop.init();
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}
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if(prop != null){
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prop.draw();
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if(prop.isDestroyed){
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prop = null;
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propTime = 1000;
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}
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}
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}
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function homeNoProtected(){
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var mapChangeIndex = [[23,11],[23,12],[23,13],[23,14],[24,11],[24,14],[25,11],[25,14]];
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map.updateMap(mapChangeIndex,WALL);
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};
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