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index.html
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<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=7" />
<meta name="copyright" content= "丁超兵版权所有 Copyright (c) 2011" />
<meta name="viewport" content="minimum-scale=1.0, maximum-scale=1.0, initial-scale=1.0, width=device-width, user-scalable=no">
<title>Battle City 坦克大战 HTML5 复刻版</title>
<style type="text/css">
*{padding:0; margin:0;}
.cRed{ color:#B53120;}
.fb{ font-weight:900;}
.tr{ text-align:right;}
body{ text-align:center; font:100 15px/24px 'Microsoft YaHei'; color:#2b2b2b; background:#FBF9FF;}
body>canvas{ margin:20px 0; }
body>div{ width:46%; padding:15px; margin:0 auto; text-align:left; /* border:2px solid #f3f3f3; -webkit-border-radius: 5px; -moz-border-radius: 5px; border-radius: 5px; */}
body>div>h3{ padding-left:12px; color:#2E8B57;}
body>div label{ padding:2px 6px 2px 2px;}
body>div>p, body>div>table{ padding:6px 12px 12px 12px; margin:0 0 24px 0; border-bottom:1px dotted #ccc;}
body>div>table{ width:70%; padding:0; margin:12px; font-size:13px; border:1px solid #E8E8E8; border-collapse: collapse;}
body>div>table td, body>div>table th{ padding:3px; text-align:center;}
body>div>table td{ color:#666; border-right:1px solid #E8E8E8; border-bottom:1px solid #E8E8E8; background:#fff;}
body>div>table th{ font-size:15px; background:#F2F2F2;}
body>div>ul{ padding:8px 0 0 28px;}
</style>
</head>
<body>
<noscript>
<div class="noscript">
你好，需要浏览器开启 JavaScript 功能才能运行本程序。<br/>
请设置浏览器开启 JavaScript 功能，然后重试。
</div>
</noscript>
<script type="text/javascript">
if(typeof document.createElement('canvas').getContext !== 'function') {
alert('你的浏览器不支持 HTML5 Canvas，不能运行本程序。');
}
</script>
<canvas id="canvas"></canvas>
<div>
<h3>选项：</h3>
<p>
缩放
<label><input type="radio" name="scale" onclick="canvas.setScale(1);" />1.5倍</label>
<label><input type="radio" name="scale" onclick="canvas.setScale(2);" />2倍</label>
<label><input type="radio" name="scale" onclick="canvas.setScale(2.5);" checked="checked" />2.5倍</label>
<label><input type="radio" name="scale" onclick="canvas.setScale(3);" />3倍</label>
<br />
暂停
<label><input type="checkbox" name="pause" onclick="loop.active = this.checked ? false : true" /></label>
</p>
<h3>按键说明：</h3>
<table>
<tr>
<th>键位</th>
<th>说明</th>
</tr>
<tr>
<td>回车键</td>
<td>开始</td>
</tr>
<tr>
<td>H</td>
<td>开火，单发；选关画面跳至上一关</td>
</tr>
<tr>
<td>J</td>
<td>开火，连发；选关画面跳至下一关</td>
</tr>
<tr>
<td>W,S,A,D</td>
<td>分别为上、下、左、右移动</td>
</tr>
</table>
<p> </p>
<h3>介绍：</h3>
<p class="intro"> 精确重现红白机上的经典。复刻制作的过程，是逐步探掘红白机原版游戏设定的过程——子弹的飞行速度、雪地地形打滑的步数都完全照搬不误。做到最后，可以说已经解构了整个游戏。原版的一些有趣的东西，比如打薄砖块卡位这样的经典做法也可以在这个版本完全重现，原版的战术玩法，搬到这里亦照样适用。35 个关卡完整添加。</p>
<h3>运行环境：</h3>
<ul>
<li>Chrome</li>
<li>Opera</li>
<li>Firefox</li>
<li>Safari （需 Quicktime。）</li>
</ul>
<p class="cRed">暂不支持 IE9。</p>
<h3 class="tr" style="color:#EE873A;">作者：重装</h3>
</div>
<script type="text/javascript" src="base/propulsion.js"></script>
<script type="text/javascript" src="base/randomizer.js"></script>
<script type="text/javascript" src="data/stages.js"></script>
<script type="text/javascript">
// 全局变量
var spr = PP.spr, rm = PP.rm, obj = PP.obj, snd = PP.snd, al = PP.al,
global = PP.global, Alarm = PP.Alarm, collision = PP.collision,
draw = PP.draw, init = PP.init, key = PP.key, load = PP.load,
loop = PP.loop, mouse = PP.mouse, physics = PP.physics, Sound = PP.Sound,
snd = PP.snd, Sprite = PP.Sprite, view = PP.view, walkDown = PP.walkDown;
var unitStep = 2, gridLength = unitStep*8, unitLength = gridLength/2, fieldWidth = gridLength*13;
var fieldHeight = fieldWidth, fieldX = 1*gridLength, fieldY = 1*gridLength;
var canvasWidth = fieldWidth+gridLength+2*gridLength, canvasHeight = fieldHeight+2*gridLength;
var fieldColor = 'rgb(0, 0, 0)';
var backgroundColor = 'rgb(127, 127, 127)';
// 设置大小以及缩放
var canvas = document.getElementById('canvas');
canvas.width = canvasWidth;
canvas.height = canvasHeight;
canvas.setScale = function(factor) {
canvas.style.cssText = 'border:1px solid white; width:'+canvas.width*factor+'px; height:'+canvas.height*factor+'px';
}
canvas.setScale(2.5);
init('canvas');
loop.rate = 60;
// 图像资源
spr.tank = {};
spr.terrain = {};
spr.bullet = {};
spr.effect = {};
spr.tank.playerTank_1 = new Sprite('resources/player_tank_1.png', 2, 8, 8);
spr.tank.playerTank_2 = new Sprite('resources/player_tank_2.png', 2, 8, 8);
spr.tank.playerTank_3 = new Sprite('resources/player_tank_3.png', 2, 8, 8);
spr.tank.playerTank_4 = new Sprite('resources/player_tank_4.png', 2, 8, 8);
spr.tank.enemyTank_1 = new Sprite('resources/enemy_tank_1.png', 2, 8, 8);
spr.tank.enemyTank_1_red = new Sprite('resources/enemy_tank_1_red.png', 2, 8, 8);
spr.tank.enemyTank_2 = new Sprite('resources/enemy_tank_2.png', 2, 8, 8);
spr.tank.enemyTank_2_red = new Sprite('resources/enemy_tank_2_red.png', 2, 8, 8);
spr.tank.enemyTank_3 = new Sprite('resources/enemy_tank_3.png', 2, 8, 8);
spr.tank.enemyTank_3_red = new Sprite('resources/enemy_tank_3_red.png', 2, 8, 8);
spr.tank.enemyTank_4a = new Sprite('resources/enemy_tank_4a.png', 2, 8, 8);
spr.tank.enemyTank_4b = new Sprite('resources/enemy_tank_4b.png', 2, 8, 8);
spr.tank.enemyTank_4c = new Sprite('resources/enemy_tank_4c.png', 2, 8, 8);
spr.tank.enemyTank_4_red = new Sprite('resources/enemy_tank_4_red.png', 2, 8, 8);
spr.terrain.brick = new Sprite('resources/terrain_brick.png', 1, 4, 4);
spr.terrain.river = new Sprite('resources/terrain_river.png', 2, 4, 4);
spr.terrain.snow = new Sprite('resources/terrain_snow.png', 1, 4, 4);
spr.terrain.jungle = new Sprite('resources/terrain_jungle.png', 1, 4, 4);
spr.terrain.steel = new Sprite('resources/terrain_steel.png', 1, 4, 4);
spr.terrain.camp = new Sprite('resources/terrain_camp.png', 2, 8, 8);
spr.bullet = new Sprite('resources/bullet.png', 1, 2, 2);
spr.effect.exploding_1 = new Sprite('resources/effect_exploding_1.png', 3, 16, 16);
spr.effect.exploding_2 = new Sprite('resources/effect_exploding_2.png', 6, 16, 16);
spr.effect.born = new Sprite('resources/effect_born.png', 4, 8, 8);
spr.effect.divine = new Sprite('resources/effect_divine.png', 2, 8, 8); // 无敌状态光环
spr.tankCountIco = new Sprite('resources/tank_count_ico.png', 2, 4, 4);
spr.chars = new Sprite('resources/chars.png', 42, 4, 4);
spr.flag = new Sprite('resources/flag.png', 1, 8, 8);
spr.bonus = new Sprite('resources/bonus.png', 6, 8, 8);
spr.gameOver = new Sprite('resources/game_over.png', 1, 62, 40);
spr.points = new Sprite('resources/points.png', 5, 8, 8);
spr.arrow = new Sprite('resources/arrow.png', 1, 4, 4);
spr.logo = new Sprite('resources/logo.png', 1, 0, 0);
snd.begin = new Sound('resources/begin.wav');
snd.enemyDie = new Sound('resources/edie.wav');
snd.playerDie = new Sound('resources/wdie.wav');
snd.fire = new Sound('resources/fire.wav');
snd.get = new Sound('resources/get.wav');
//snd.walk = new Sound('resources/walk.wav');
snd.bulletExplode = new Sound('resources/bullet_explode.wav');
snd.snow = new Sound('resources/snow.wav');
load(function() {
window.clearInterval(loadingBar);
draw.rectangle(0, 0, canvasWidth, canvasHeight, false, 'rgb(0, 0, 0)');
draw.color = 'rgb(255, 255, 255)';
draw.text(canvasWidth/2, canvasHeight/2, 'Loading 100% ...');
global.stage = {
current: 0,
max: 35,
//current: 1,
toString: function() {
return 'stage_'+this.getActualStage();
},
getActualStage: function() {
return this.current%this.max != 0 ? this.current%this.max : this.max;
}
}
global.canChangeStage = false;
/* 全局方法 */
// 方向与夹角的转化。图片资源以东方向为初始方向
global.direction = {
directionAngle: {
up: 3*Math.PI/2,
down: 3*Math.PI/2,
left: 0,
right: 0
},
directionScale: {
up: [1, 1],
down: [-1, 1],
left: [-1, 1],
right: [1, 1]
},
getAngle: function(t) {
return global.direction.directionAngle[t.direction] !== undefined ?
global.direction.directionAngle[t.direction] : false;
},
getScales: function(t) {
return global.direction.directionScale[t.direction] !== undefined ?
global.direction.directionScale[t.direction] : false;
}
};
// 精确到毫秒的时间的生成
global.time = {
getNow: function() {
return Math.round(new Date().getTime());
}
};
global.position = {
setPos: function(t, gridX, gridY) {
t.x = this.getCoordinate(gridX, gridY)[0];
t.y = this.getCoordinate(gridX, gridY)[1];
},
getCoordinate: function(gridX, gridY) {
return [unitLength*gridX+fieldX, unitLength*gridY+fieldY];
}
};
// 分数
global.score = {
playerTank: 0,
getHiScore: function() {
return Math.max(this.playerTank, 20000);
}
};
global.life = {
playerTank: 2,
maxLife: 9
};
global.playerTank = {};
// 关卡结束前保存的画布
global.stageEndShot = null;
/* 坦克 */
obj.tank = {
parent: {
mask: [[-8,-8],[8,-8],[8,8],[-8,8]],
//mask: spr.tank.playerTank_1.mask,
moving: false,
step: 1,
// 已连续移动步数
movedStep: 0,
// 连续移动几步后间歇停止
stepInter: 3,
direction: 'up',
health: 1,
group: 1,
maxBullet: 1,
bullets: [],
shuttleIndex: 0,
lastCasted: 0,
castCd: 200,
lastBulletExploded: 0,
bulletExplodedCd: 50,
frame: 0,
bulletClass: 'slowBullet',
initialize: function(t) {
},
tick: function(t) {
},
// 步进
move: function(t) {
if(t.movedStep < t.stepInter || t.stepInter == 0) {
t.movedStep++;
switch(t.direction) {
case 'up':
t.y -= t.step;
break;
case 'down':
t.y += t.step;
break;
case 'left':
t.x -= t.step;
break;
case 'right':
t.x += t.step;
break;
}
} else {
t.movedStep = 0;
}
},
// 前进
forward: function(t) {
//snd.walk.play();
if( ! t.detectCollision(t)) {
t.move(t);
}
},
castBullet: function(t) {
if(t.shuttleIndex >= t.maxBullet && t.bullets.length == 0) {
t.shuttleIndex = 0;
} else if(t.shuttleIndex < t.bullets.length) {
t.shuttleIndex = t.bullets.length;
}
if(t.canCast(t)) {
var bullet = obj.bullet[t.bulletClass];
//if(t.bullets.push(bullet)) {
// 最近一次发弹时间
t.lastCasted = global.time.getNow();
var fixX = 0, fixY = 0;
switch(t.direction) {
case 'up':
fixY = -4;
break;
case 'down':
fixY = 4;
break;
case 'left':
fixX = -4;
break;
case 'right':
fixX = 4;
break;
}
bullet = loop.beget(bullet, t.x+fixX, t.y+fixY);
bullet.direction = t.direction;
bullet.host = t;
t.bullets.push(bullet);
//}
}
},
canCast: function(t) {
if(t.lastCasted == 0) {
return true;
}
/* 允许发射的三个条件：已发射炮弹数小于坦克允许同时最大炮弹数（一梭子最多的炮弹数）、
上一次发射时间延迟大于指定值、
如果是第一发炮弹，上一梭子炮弹的爆炸时间延迟大于指定值
*/
return t.bullets.length < t.maxBullet
&& global.time.getNow() - t.lastCasted > t.castCd
&& ((t.shuttleIndex > 0 && t.shuttleIndex < t.maxBullet)
|| (t.shuttleIndex == 0 && global.time.getNow() - t.lastBulletExploded > t.bulletExplodedCd));
},
// 坦克转向时的位置修正，使得坦克总处于布局方格上
fixPosY: function(t) {
if(t.direction == 'up' || t.direction == 'down') {
if(t.y%unitLength >= unitLength/2 && t.y%unitLength < unitLength) {
t.y = t.y + (unitLength-t.y%unitLength);
} else if(t.y%unitLength < unitLength/2 && t.y%unitLength > 0) {
t.y = t.y - t.y%unitLength;
}
return true;
}
return false;
},
fixPosX: function(t) {
if(t.direction == 'left' || t.direction == 'right') {
if(t.x%unitLength >= unitLength/2 && t.x%unitLength < unitLength) {
t.x = t.x + (unitLength-t.x%unitLength);
} else if(t.x%unitLength < unitLength/2 && t.x%unitLength > 0) {
t.x = t.x - t.x%unitLength;
}
return true;
}
return false;
},
detectCollision: function(t) {
var fixX = 0;
var fixY = 0;
// 边界碰撞检测
switch(t.direction) {
case 'up':
fixY = -unitStep;
if(collision.line(t.mask, t.x, t.y, 0, fieldX, fieldY, fieldX+fieldWidth, fieldY)) {
return true;
}
//result = t.y > this.y;
break;
case 'down':
fixY = unitStep;
if(collision.line(t.mask, t.x, t.y, 0, fieldX, fieldY+fieldHeight, fieldX+fieldWidth, fieldY+fieldHeight)) {
return true;
}
//result = t.y < this.y;
break;
case 'left':
fixX = -unitStep;
if(collision.line(t.mask, t.x, t.y, 0, fieldX, fieldY, fieldX, fieldY+fieldHeight)) {
return true;
}
//result = t.x > this.x;
break;
case 'right':
fixX = unitStep;
if(collision.line(t.mask, t.x, t.y, 0, fieldX+fieldWidth, fieldY, fieldX+fieldWidth, fieldY+fieldHeight)) {
return true;
}
//result = t.x < this.x;
break;
}
// 地形碰撞检测
result = false;
units = ['brick', 'river', 'steel', 'camp'];
for(var i=0; i<units.length; i++) {
walkDown(obj.terrain[units[i]], function() {
needDetectCollision = true;
// 两个单位距离大于一定值则不进行碰撞检测
range = 0;
if(units[i] != 'camp') {
range = unitLength+unitLength/2;
} else {
range = unitLength+gridLength/2;
}
if(Math.abs(t.x - this.x) >= range
|| Math.abs(t.y - this.y) >= range) {
needDetectCollision = false;
}
if(needDetectCollision) {
if(collision.masks(t.mask, t.x+fixX, t.y+fixY, 0, this.mask, this.x, this.y, 0)) {
result = this;
}
}
});
if(result) {
return result;
}
}
// 坦克碰撞检测
units = ['playerTank', 'enemyTank_1', 'enemyTank_2', 'enemyTank_3', 'enemyTank_4'];
for(var i=0; i<units.length; i++) {
walkDown(obj.tank[units[i]], function() {
if(this != t) {
needDetectCollision = true;
// 两个单位距离大于一定值则不进行碰撞检测
switch(t.direction) {
case 'up':
case 'down':
if(Math.abs(t.x - this.x) >= gridLength-3*unitStep) {
needDetectCollision = false;
}
break;
case 'left':
case 'right':
if(Math.abs(t.y - this.y) >= gridLength-3*unitStep) {
needDetectCollision = false;
}
break;
}
if(needDetectCollision) {
if(collision.masks(t.mask, t.x, t.y, 0, this.mask, this.x, this.y, 0)) {
switch(t.direction) {
case 'up':
if(t.y > this.y && Math.abs(t.y - this.y) <= gridLength) {
result = true;
}
break;
case 'down':
if(t.y < this.y && Math.abs(t.y - this.y) <= gridLength) {
result = true;
}
break;
case 'left':
if(t.x > this.x && Math.abs(t.x - this.x) <= gridLength) {
result = true;
}
break;
case 'right':
if(t.x < this.x && Math.abs(t.x - this.x) <= gridLength) {
result = true;
}
break;
}
}
}
}
});
}
if(result) {
return result;
}
// 奖励道具碰撞检测
if(typeof t.becomeDivine === 'function') {
units = ['star', 'forklift', 'life', 'bonus', 'hat', 'mine', 'timer'];
for(var i=0; i<units.length; i++) {
walkDown(obj.bonus[units[i]], function() {
if(collision.masks(t.mask, t.x, t.y, 0, this.mask, this.x, this.y, 0)) {
this.beGot(this, t);
}
});
}
}
return result;
},
endTick: function(t) {
},
beHit: function(t, bullet) {
t.health -= 1;
if( ! (t.health > 0)) {
t.over(t, true);
}
},
over: function(t, hasScore) {
loop.beget(obj.effect.exploding_2, t.x, t.y);
if(hasScore) {
s = loop.beget(obj.scorer, t.score, t);
s.delay = 35;
s.setScoreSource(s, t.score, t);
rm.play.scores.push(t);
}
loop.remove(t);
snd.enemyDie.play();
},
draw: function(t) {
angle = global.direction.getAngle(t);
scales = global.direction.getScales(t);
if(t.moving && t.movedStep > 0) {
t.frame = t.sprite.nextFrame(t.frame);
}
t.sprite.draw(t.x, t.y, t.frame, angle, scales[0], scales[1]);
t.drawCovers(t);
},
// 绘制遮蔽物，即森林地形
covers: [],
drawCovers: function(t) {
var covers = [];
walkDown(obj.terrain.jungle, function() {
if(Math.abs(t.x - this.x) <= unitLength/2
&& Math.abs(t.y - this.y) <= unitLength/2+unitLength
|| Math.abs(t.y - this.y) <= unitLength/2
&& Math.abs(t.x - this.x) <= unitLength/2+unitLength) {
covers.push(this);
this.sprite.draw(this.x, this.y);
//draw.line(this.x, this.y, this.x+1, this.y+1, 1, 'rgb(255, 0, 0)');
}
});
t.covers = covers;
}
},
/* 敌人坦克 */
enemyTank: {
// 阵营，玩家为 1，电脑为 2
group: 2,
moving: true,
direction: 'down',
hasBonus: false,
sprite2: {},
defaultSprite: {},
collided: false,
stepInter: 2,
score: 0,
initialize: function(t) {
t.bullets = [];
al.bonus = {};
//global.position.setPos(t, 6, 20);
},
beHit: function(t, bullet) {
t.generateBonus(t);
t.health -= 1;
if( ! (t.health > 0)) {
t.over(t, true);
}
},
generateBonus: function(t) {
if(t.hasBonus) {
t.hasBonus = false;
units = ['life', 'star', 'forklift', 'hat', 'mine', 'timer'];
for(var i=0; i<units.length; i++) {
walkDown(obj.bonus[units[i]], function() {
if(this.registered) {
loop.remove(this);
}
});
}
lifeRate = 0.1;
if(global.life.playerTank >= 1) {
lifeRate = 0.1;
} else {
lifeRate = 0.15;
}
if(rand(200) < 100*lifeRate) {
loop.register(obj.bonus.life);
} else {
loop.register(obj.bonus[Math.choose('star', 'forklift', 'hat', 'mine', 'timer')]);
}
//loop.register(obj.bonus['hat']);
}
},
tick: function(t) {
/* 敌方坦克的人工智能 */
// 坦克转向几率因子
if( ! rm.play.enemyFreeze) {
var factor = 1.6;
if(t.collided) {
// 发生碰撞则将转向几率调高
factor *= 0.15;
}
if(rand(factor*loop.rate) == 1) {
if( ! t.fixPosY(t)) {
t.fixPosX(t);
}
hOrV = Math.choose('h', 'v');
factor = 100;
// 向我方本营移动的倾向
if(hOrV == 'h') {
walkDown(obj.terrain.camp, function() {
angle = Math.pointDirection(this.x, this.y, t.x, t.y);
if(angle >= Math.PI && angle < Math.PI*3/2) {
leftOdds = 0.3;
} else {
leftOdds = 0.7;
}
});
if(rand(factor) < factor*leftOdds) {
t.direction = 'left';
} else {
t.direction = 'right';
}
} else if(hOrV == 'v') {
downOdds = 0.83;
if(rand(factor) < factor*downOdds) {
t.direction = 'down';
} else {
t.direction = 'up';
}
}
//t.direction = Math.choose('left', 'right');
}
t.moving = true;
t.forward(t);
// 坦克发炮弹几率因子
var factor = 0.9;
if(t.collided) {
// 发生碰撞则将转向发弹几率调高
factor *= 0.9;
// 如果方向为下，并且碰到砖头，发弹几率大幅调高
if(t.direction == 'down'
&& typeof t.collided == 'object'
&& t.collided.hasOwnProperty('masks')) {
factor *= 0.4;
}
}
/*
walkDown(obj.tank.playerTank, function() {
if(Math.abs(this.x - t.x) < unitLength
|| Math.abs(this.y - t.y) < unitLength) {
factor = 0.1;
}
});
*/
if(rand(factor*loop.rate) == 1) {
t.castBullet(t);
}
} else {
t.moving = false;
}
},
// 前进
forward: function(t) {
if( ! (collided = t.detectCollision(t))) {
t.move(t);
t.collided = false;
} else {
t.collided = collided;
}
},
setBonus: function(t) {
t.hasBonus = true;
al.bonus = new Alarm(function() {
if(t.hasBonus) {
tmp = t.sprite;
t.sprite = t.sprite2;
t.sprite2 = tmp;
this.time = loop.rate*.3;
} else {
this.stop();
t.sprite = t.defaultSprite;
}
});
al.bonus.time = 0;
}
},
enemyTank_1: {
sprite: spr.tank.enemyTank_1,
defaultSprite: spr.tank.enemyTank_1,
sprite2: spr.tank.enemyTank_1_red,
stepInter: 1,
score: 100
},
enemyTank_2: {
sprite: spr.tank.enemyTank_2,
defaultSprite: spr.tank.enemyTank_2,
sprite2: spr.tank.enemyTank_2_red,
stepInter: 0,
score: 200
},
enemyTank_3: {
sprite: spr.tank.enemyTank_3,
defaultSprite: spr.tank.enemyTank_3,
sprite2: spr.tank.enemyTank_3_red,
stepInter: 1,
score: 300,
bulletClass: 'fastBullet'
},
enemyTank_4: {
sprite: spr.tank.enemyTank_4a,
defaultSprite: spr.tank.enemyTank_4a,
sprite2: spr.tank.enemyTank_4_red,
stepInter: 1,
health: 4,
score: 400,
flashFlag: 0,
bulletClass: 'slowBullet',
initialize: function(t) {
t.defaultSprite = {};
},
beginTick: function(t) {
if( ! t.hasBonus) {
switch(t.health) {
case 4:
t.sprite = t.flashFlag == 0 ?
spr.tank.enemyTank_4a : spr.tank.enemyTank_4c;
t.updateFlashFlag(t);
break;
case 3:
t.sprite = t.flashFlag == 0 ?
spr.tank.enemyTank_4a : spr.tank.enemyTank_4b;
t.updateFlashFlag(t);
break;
case 2:
t.sprite = t.flashFlag == 0 ?
spr.tank.enemyTank_4b : spr.tank.enemyTank_4c;
t.updateFlashFlag(t);
break;
case 1:
t.sprite = spr.tank.enemyTank_4a;
break;
}
}
},
updateFlashFlag: function(t) {
t.flashFlag = t.flashFlag == 0 ? 1 : 0;
},
beHit: function(t, bullet) {
t.generateBonus(t);
t.health -= 1;
switch(t.health) {
case 3:
t.sprite = spr.tank.enemyTank_4b;
t.defaultSprite = spr.tank.enemyTank_4b;
break;
case 2:
t.sprite = spr.tank.enemyTank_4c;
t.defaultSprite = spr.tank.enemyTank_4c;
break;
case 1:
t.sprite = spr.tank.enemyTank_4a;
t.defaultSprite = spr.tank.enemyTank_4a;
break;
}
if( ! (t.health > 0)) {
t.over(t, true);
}
}
},
// 玩家坦克
playerTank: {
//persistant: true,
group: 1,
level: 0,
sprite: spr.tank.playerTank_1,
divineAlarm: null,
depth: 0,
bulletClass: 'slowBullet',
divine: false,
//divine: true,
divineShield: {},
/* 打滑参数。玩家坦克在雪地地形上会打滑 */
// 打滑步数
slided: 0,
// 是否打滑
sliding: false,
initialize: function(t) {
t.divineShield = {};
t.bullets = [];
t.direction = 'up';
t.becomeDivine(t, 3);
},
tick: function(t) {
if(rm.play.isGameOver) {
t.moving = false;
return ;
}
t.moving = true;
// 移动
if(key.up.down || key.w.pressed) {
t.fixPosX(t);
t.direction = 'up';
} else if(key.down.down || key.s.pressed) {
t.fixPosX(t);
t.direction = 'down';
} else if(key.left.down || key.a.pressed) {
t.fixPosY(t);
t.direction = 'left';
} else if(key.right.down || key.d.pressed) {
t.fixPosY(t);
t.direction = 'right';
} else {
t.moving = false;
}
if(t.sliding == true && t.slided < 2*gridLength && t.isCollidedSnow(t)) {
t.slided++;
if(t.slided == 1) {
snd.snow.play();
}
} else {
t.sliding = false;
}
if(t.moving || t.sliding) {
if(t.moving && ! t.sliding) {
t.slided = 0;
}
t.forward(t);
} else {
// 检测雪地碰撞，是则设置为打滑状态
if(t.isCollidedSnow(t)) {
t.sliding = true;
}
}
// 发射炮弹
if(key.h.down || key.j.pressed) {
t.castBullet(t);
}
// 如果处于无敌状态，光环随坦克移动
if(t.divine && t.divineShield.hasOwnProperty('registered') && t.divineShield.registered) {
t.divineShield.x = t.x;
t.divineShield.y = t.y;
}
},
beHit: function(t, bullet) {
if( ! t.divine) {
t.health -= 1;
}
if( ! (t.health > 0)) {
t.over(t);
}
},
isCollidedSnow: function(t) {
var collisionCount = 0;
walkDown(obj.terrain.snow, function() {
if(Math.abs(this.x-t.x) < gridLength && Math.abs(this.y-t.y) < gridLength
&& collision.masks([[-7, -7], [7, -7], [7, 7], [-7, 7]], t.x, t.y, 0, this.mask, this.x, this.y, 0)) {
collisionCount++;
}
});
return collisionCount >= 4;
},
castBullet: function(t) {
if(t.shuttleIndex >= t.maxBullet && t.bullets.length == 0) {
t.shuttleIndex = 0;
} else if(t.shuttleIndex < t.bullets.length) {
t.shuttleIndex = t.bullets.length;
}
if(t.canCast(t)) {
var bullet = obj.bullet[t.bulletClass];
//if(t.bullets.push(bullet)) {
// 最近一次发弹时间
t.lastCasted = global.time.getNow();
var fixX = 0, fixY = 0;
switch(t.direction) {
case 'up':
fixY = -4;
break;
case 'down':
fixY = 4;
break;
case 'left':
fixX = -4;
break;
case 'right':
fixX = 4;
break;
}
bullet = loop.beget(bullet, t.x+fixX, t.y+fixY);
if(snd.begin.ended) {
snd.fire.play();
}
bullet.direction = t.direction;
bullet.host = t;
t.bullets.push(bullet);
//}
}
},
over: function(t) {
loop.remove(t);
loop.beget(obj.effect.exploding_2, t.x, t.y);
snd.playerDie.play();
global.playerTank = {};
if(global.life['playerTank'] > 0) {
global.life['playerTank'] -= 1;
new Alarm(function() {
generator = loop.beget(obj.tankGenerator.playerTankGenerator, 9, 25);
}).time = loop.rate*0.75;
} else {
rm.play.gameOver();
}