触摸事件的属性
Paste_Image.png
js中的utf-8符号编码
Paste_Image.png
Paste_Image.png
检测移动端
Paste_Image.png
Paste_Image.png
this.setupMobile = function () {
var container = document.getElementById("container"), hasTouch = !!('ontouchstart' in window), w = window.innerWidth , h = window.innerHeight;
if (hasTouch) {Game.mobile = true;}
if (screen.width >= 1280 || !hasTouch) {return false}
if (w > h) {
alert('旋转屏幕');
w = window.innerWidth; h = window.innerHeight;
}
container.style.height = h * 2 +"px";
window.scrollTo(0, 1);
h = window.innerHeight + 2;
container.style.height = h + 'px';
container.style.width = w + 'px';
container.style.padding = 0;
if (h >= this.canvas.height * 1.75 || w >= this.canvas.height * 1.75) {
this.canvasMultiplier = 2;
this.canvas.width = w / 2;
this.canvas.height = h / 2;
this.canvas.style.width = w + "px";
this.canvas.style.height = h + "px";
} else {
this.canvas.width = w;
this.canvas.height = h;
}
this.canvas.style.position = 'absolute';
this.canvas.style.left = "0px";
this.canvas.style.top = "0px";
}
GamePoints
var GamePoints = function () {
Game.points = 0;
var pointsLength = 8;
this.draw = function (ctx) {
ctx.save();
ctx.font = "bold 18px arial";
ctx.fillStyle = "#fff";
var txt = "" + Game.points;
var i = pointsLength - txt.length, zeros = "";
while (i-- >0) {zeros += "0"}
ctx.fillText(zeros + txt, 10, 20);
ctx.restore();
};
this.step = function (dt) {}
}
TouchControls
var TouchControls = function () {
var gutterWidth = 10;
var unitWidth = Game.width/5;
var blockWidth = unitWidth - gutterWidth;
this.drawSquare = function (ctx, x, y, txt, on) {
ctx.globalAlpha = on ? 0.9 : 0.6;
ctx.fillStyle = "#ccc";
ctx.fillRect(x, y, blockWidth, blockWidth);
ctx.fillStyle = "#fff";
ctx.textAlign = "center";
ctx.globalAlpha = 1.0;
ctx.font = "bold" + (3 * unitWidth/4) + "px arial";
ctx.fillText(txt, x + blockWidth / 2, y + 3* blockWidth/4 + 5);
}
this.draw = function (ctx) {
ctx.save();
var yLoc = Game.canvas.height - unitWidth;
this.drawSquare(ctx, gutterWidth, yLoc, "\u25c0", Game.keys['left']);
this.drawSquare(ctx, unitWidth + gutterWidth, yLoc, "\u25b6", Game.keys['right']);
this.drawSquare(ctx, Game.canvas.width - gutterWidth - unitWidth, yLoc, "A", Game.keys['fire']);
ctx.restore();
};
this.step = function(dt) {};
this.trackTouch = function (e) {
console.log('fuck')
var touch, x;
e.preventDefault();
Game.keys['left'] = false;
Game.keys['right'] = false;
for (var i = 0; i< e.targetTouches.length; i++) {
touch = e.targetTouches[i];
//console.log(Game.canvasMultiplier)
x = touch.pageX / Game.canvasMultiplier - Game.canvas.offsetLeft;
if (x < unitWidth) {
Game.keys['left'] = true;
}
if (x > unitWidth && x < 2 * unitWidth) {
Game.keys['right'] = true;
}
}
//console.log(e.type)
if (e.type == 'touchstart') {
for (var i = 0; i < e.changedTouches.length; i++) {
touch = e.changedTouches[i];
x = touch.pageX / Game.canvasMultiplier - Game.canvas.offsetLeft;
if (x > 4 * unitWidth) {
Game.keys['fire'] = true;
}
}
}
};
Game.canvas.addEventListener('touchstart', this.trackTouch, false);
Game.canvas.addEventListener('touchmove', this.trackTouch, false);
Game.canvas.addEventListener('touchend', this.trackTouch, false);
Game.canvas.addEventListener('touchcancel', this.trackTouch, false);
Game.playerOffset = unitWidth + 20;
//console.log(unitWidth,Game.playerOffset)
}
EnemyMissile
var EnemyMissile = function (x, y) {
this.setup('enemy_missile', {vy: 200, damage: 10});
this.x = x - this.w / 2;
this.y = y;
}
EnemyMissile.prototype = new Sprite();
EnemyMissile.prototype.step = function (dt) {
this.y += this.vy * dt;
var collision = this.board.collide(this, OBJECT_PLAYER);
if (collision) {
collision.hit(this.damage);
this.board.remove(this);
} else if (this.y > Game.height) {
this.board.remove(this);
}
};
requestAnimationFrame兼容处理
(function() {
var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
window.cancelAnimationFrame =
window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame'];
}
if (!window.requestAnimationFrame)
window.requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function() { callback(currTime + timeToCall); },
timeToCall);
lastTime = currTime + timeToCall;
return id;
};
if (!window.cancelAnimationFrame)
window.cancelAnimationFrame = function(id) {
clearTimeout(id);
};
}());
前三章总结
游戏流程:
- 数据流:
var sprites = {
ship: {sx: 0, sy: 0, w: 37, h: 42, frames: 1},
missile : {sx: 0, sy: 30, w: 2, h: 10, frames: 1},
enemy_purple : {sx: 37, sy: 0, w:42, h: 43, frames: 1},
enemy_bee: {sx: 79, sy: 0, w: 37, h: 43, frames: 1},
enemy_ship: {sx: 116, sy: 0, w: 42, h: 43, frames: 1},
enemy_circle: {sx: 158, sy:0, w: 32, h: 33, frames: 1},
explosion: {sx: 0, sy: 64, w: 64, h: 64, frames: 12},
enemy_missile :{sx: 9, sy: 42, w:3, h: 20, frame: 1}
};
var level1 = [
[0, 4000, 500, 'step'],
[6000, 13000, 800, 'ltr'],
[12000, 16000,400, 'circle'],
[18200, 20000, 500, 'straight', {x: 150}],
[18200, 20000, 500, 'straight', {x: 100}],
[18400, 20000, 500, 'straight', {x: 200}],
[22000, 25000, 400, 'wiggle', {x: 300}],
[22000, 25000, 400, 'wiggle', {x: 200}],
]
var enemies = {
straight: { x: 0, y: -50, sprite: 'enemy_ship', health: 10,
E: 100,firePercentage: 0.001 },
ltr: { x: 0, y: -100, sprite: 'enemy_purple', health: 10,
B: 75, C: 1, E: 100 ,missile:2 },
circle: { x: 250, y: -50, sprite: 'enemy_circle', health: 10,
A: 0, B: -100, C: 1, E: 20, F: 100, G: 1, H: Math.PI/2 },
wiggle: { x: 100, y: -50, sprite: 'enemy_bee', health: 20,
B: 50, C: 4, E: 100, firePercentage: 0.001, missile: 2 },
step: { x: 0, y: -50, sprite: 'enemy_circle', health: 10,
B: 150, C: 1.2, E: 75 }
};
2.文档加载完成，初始化游戏并开始游戏
window.addEventListener("load", function(){Game.initialize("game", sprites, startGame};})
在Game.initialize中完成了画布初始化，移动检测，输入检测，并开始游戏循环逻辑，如果检测为移动设备，则添加触摸检测。加载精灵图。将传入的回调作为加载完成的回调。
3.资源加载完成后，调用回调startGame，绘制星空和标题版块。标题版块中传入回调，其中监听了Game.keys['fire']，即空格按键，当其按下时，调用回调playGame;
4.playGame中调用 了新的对象GameBoard，一个管理着动态游戏对象的类，其中游戏开始时应该出现 的游戏人，和关卡数据。然后将这个对象传入Game中的board进入循环。
5.游戏主体完成，然后就是各个内容的step函数和draw函数随着时间不停的更新和重绘
(function() {
var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
window.cancelAnimationFrame =
window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame'];
}
if (!window.requestAnimationFrame)
window.requestAnimationFrame = function(callback, element) {
var currTime = new Date().getTime();
var timeToCall = Math.max(0, 16 - (currTime - lastTime));
var id = window.setTimeout(function() { callback(currTime + timeToCall); },
timeToCall);
lastTime = currTime + timeToCall;
return id;
};
if (!window.cancelAnimationFrame)
window.cancelAnimationFrame = function(id) {
clearTimeout(id);
};
}());
var OBJECT_PLAYER = 1,
OBJECT_PLAYER_PROJECTILE = 2,
OBJECT_ENEMY = 4,
OBJECT_ENEMY_PROJECTILE = 8,
OBJECT_POWERUP = 16;
//精灵类，load初化图片，draw负责进行绘制
var SpriteSheet = new function() {
this.map = {};
this.load = function(spriteData, callback) {
this.map = spriteData;
this.image = new Image();
this.image.onload = callback;
this.image.src = 'sprites.png';
};
this.draw = function(ctx, sprite, x, y, frame) {
var s = this.map[sprite];
if (!frame) frame = 0;
ctx.drawImage(this.image, s.sx + frame * s.w, s.sy, s.w, s.h, x, y, s.w, s.h);
}
}
var Sprite = function () {}
Sprite.prototype.setup = function (sprite, props) {
this.sprite = sprite;
this.merge(props);
this.frame = this.frame || 0;
this.w = SpriteSheet.map[sprite].w;
this.h = SpriteSheet.map[sprite].h;
}
Sprite.prototype.merge = function (props) {
if (props) {
for (var prop in props) {
this[prop] = props[prop];
}
}
}
Sprite.prototype.hit = function() {
this.board.remove(this);
}
Sprite.prototype.draw = function (ctx) {
SpriteSheet.draw(ctx, this.sprite, this.x, this.y, this.frame);
}
//游戏类, initialize,融合canvas属性，setupInput检测输入，loop对Game中的boards组件进行循环运行step和draw方法
var Game = new function() {
this.initialize = function(canvasElementId, sprite_data, callback) {
this.canvas = document.getElementById(canvasElementId);
this.canvasMultiplier = 1;
this.playerOffset = 0;
this.setupMobile();
this.width =this.canvas.width;
this.height = this.canvas.height;
this.ctx = this.canvas.getContext && this.canvas.getContext('2d');
if (!this.ctx) {return alert('请升级浏览器');}
this.setupInput();
this.loop();
if (this.mobile) {
this.setBoard(4, new TouchControls());
}
SpriteSheet.load(sprite_data, callback);
}
var KEY_CODES = {37:'left', 39:'right', 32:'fire'};
this.keys = {};
this.setupInput = function(){
window.addEventListener('keydown', function(e){
if (KEY_CODES[e.keyCode]) {
Game.keys[KEY_CODES[e.keyCode]] = true;
e.preventDefault();
}
},false);
window.addEventListener('keyup', function(e){
if (KEY_CODES[e.keyCode]) {
Game.keys[KEY_CODES[e.keyCode]] = false;
e.preventDefault();
}
},false);
};
var boards = [];
// this.loop = function(){
// console.log(boards)
// var dt = 16/1000;
// for (var i = 0;i < boards.length; i ++) {
// if (boards[i]) {
// boards[i].step(dt);
// boards[i] && boards[i].draw(Game.ctx);
// }
// }
// setTimeout(Game.loop, 30);
// };
var lastTime = new Date().getTime();
var maxTime = 1/30;
this.loop = function() {
var curTime = new Date().getTime();
requestAnimationFrame(Game.loop);
var dt = (curTime - lastTime)/1000;
if(dt > maxTime) { dt = maxTime; }
for(var i=0,len = boards.length;i= 1280 || !hasTouch) {return false}
if (w > h) {
alert('旋转屏幕');
w = window.innerWidth; h = window.innerHeight;
}
container.style.height = h * 2 +"px";
window.scrollTo(0, 1);
h = window.innerHeight + 2;
container.style.height = h + 'px';
container.style.width = w + 'px';
container.style.padding = 0;
if (h >= this.canvas.height * 1.75 || w >= this.canvas.height * 1.75) {
this.canvasMultiplier = 2;
this.canvas.width = w / 2;
this.canvas.height = h / 2;
this.canvas.style.width = w + "px";
this.canvas.style.height = h + "px";
} else {
this.canvas.width = w;
this.canvas.height = h;
}
this.canvas.style.position = 'absolute';
this.canvas.style.left = "0px";
this.canvas.style.top = "0px";
}
}
//星空类，组件式，用一个canvas在作为背景来绘制
var Starfield = function(speed, opacity, numStarts, clear){
var stars = document.createElement("canvas");
stars.width = Game.canvas.width;
stars.height = Game.canvas.height;
var starCtx = stars.getContext('2d');
var offset = 0;
//绘制黑色背景
if (clear) {
starCtx.fillStyle = "#000";
starCtx.fillRect(0,0, stars.width, stars.height);
}
starCtx.fillStyle = "#FFF";
starCtx.globalAlpha = opacity;
for (var i = 0; i < numStarts; i ++) {
starCtx.fillRect(Math.floor(Math.random()*stars.width), Math.floor(Math.random()*stars.height), 2, 2);
}
this.draw = function(ctx){
var intOffset = Math.floor(offset);
var remaining = stars.height - intOffset;
if (intOffset > 0) {
ctx.drawImage(stars,0, remaining, stars.width, intOffset, 0, 0, stars.width, intOffset);
}
if (remaining > 0 ) {
ctx.drawImage(stars, 0, 0, stars.width, remaining, 0, intOffset, stars.width, remaining);
}
}
//console.log(offset)
this.step = function(dt) {
offset += dt * speed;
//console.log(dt)
offset = offset % stars.height;
}
}
var PlayerShip = function() {
this.setup('ship', {vx: 0, frame: 0, reloadTime: 0.25, maxVel: 200});
// this.w = SpriteSheet.map['ship'].w;
// this.h = SpriteSheet.map['ship'].h;
this.x = Game.canvas.width / 2 - this.w / 2;
this.y = Game.canvas.height - Game.playerOffset - 10 - this.h;
// this.vx = 0;
//重装弹间隔
// this.reloadTime = 0.1;
this.reload = this.reloadTime;
// this.maxVel = 200;
this.step = function(dt) {
if (Game.keys['left']) {this.vx = -this.maxVel; }
else if (Game.keys['right']) {this.vx = this.maxVel;}
else { this.vx = 0;}
this.x += this.vx * dt;
if (this.x < 0) {this.x = 0;}
else if (this.x > Game.width - this.w) {
this.x = Game.width - this.w;
}
this.reload -= dt;
//在发射时检测是否到达冷却时间
if (Game.keys['fire'] && this.reload < 0) {
Game.keys['fire'] = false;
this.reload = this.reloadTime;
this.board.add(new PlayerMissile(this.x, this.y + this.h / 2));
this.board.add(new PlayerMissile(this.x + this.w, this.y + this.h / 2));
}
}
// this.draw = function(ctx) {
// SpriteSheet.draw(ctx, 'ship', this.x, this.y, 0);
// }
}
PlayerShip.prototype = new Sprite();
PlayerShip.prototype.type = OBJECT_PLAYER;
PlayerShip.prototype.hit = function() {
this.board.remove(this);
this.board.add(new Explosion(this.x +this.w/2 , this.y + this.h/2,loseGame))
;}
//object[],cnt[],removed[]
var GameBoard = function() {
var board = this;
this.objects = [];
this.cnt = [];
this.add = function(obj){
obj.board = this;
this.objects.push(obj);
this.cnt[obj.type] = (this.cnt[obj.type] || 0) + 1;
return obj;
};
this.remove = function(obj) {
var wasStillAlive = this.removed.indexOf(obj) == -1;
//console.log(wasStillAlive)
if (wasStillAlive) {
this.removed.push(obj);
}
return wasStillAlive;
}
this.iterate = function(funcName){
var args = Array.prototype.slice.call(arguments, 1);
for (var i = 0, len = this.objects.length; i < len; i++) {
var obj = this.objects[i];
obj[funcName].apply(obj, args);
}
};
this.detect = function(func){
for (var i= 0, val = null, len = this.objects.length; i < len; i ++) {
if (func.call(this.objects[i])) return this.objects[i];
}
return false;
}
this.step = function(dt) {
//console.log('sdf')
this.resetRemoved();
this.iterate('step', dt);
this.finalizeRemoved();
}
this.draw = function(ctx) {
this.iterate('draw', ctx);
}
this.overlap = function(o1, o2) {
return !((o1.y + o1.h -1 < o2.y) || (o1.y > o2.y + o2.h - 1) || (o1.x + o1.w -1 < o2.x) || (o1.x > o2.x + o2.w -1));
}
this.collide = function(obj, type) {
return this.detect(function(){
if (obj != this) {
var col = (!type || this.type & type) && board.overlap(obj, this)
return col ? this : false;
}
});
};
this.resetRemoved = function(){this.removed = [];}
this.finalizeRemoved = function () {
for (var i = 0, len = this.removed.length; i < len; i ++) {
var idx = this.objects.indexOf(this.removed[i]);
if (idx != -1) {
this.cnt[this.removed[i].type]--;
this.objects.splice(idx, 1);
}
}
}
}
var PlayerMissile = function(x, y) {
this.setup('missile', {vy: -700, damage: 10})
// this.w = SpriteSheet.map['missile'].w;
// this.h = SpriteSheet.map['missile'].h;
this.x = x - this.w / 2;
this.y = y -this.h;
// this.vy = -700;
};
PlayerMissile.prototype = new Sprite();
PlayerMissile.prototype.type = OBJECT_ENEMY_PROJECTILE;
PlayerMissile.prototype.step = function(dt) {
this.y += this.vy * dt;
var collision = this.board.collide(this, OBJECT_ENEMY);
if (collision) {
collision.hit(this.damage);
this.board.remove(this);
} else if (this.y < -this.h) {
this.board.remove(this);
}
if (this.y < - this.h) {
this.board.remove(this);
}
};
var TitleScreen = function (title, subtitle, callback) {
this.step = function (dt) {
if (Game.keys['fire'] && callback) callback();
};
this.draw = function (ctx) {
ctx.fillStyle = "#fff";
ctx.textAlign = "center"
ctx.font = "bold 40px bangers";
ctx.fillText(title, Game.width/2, Game.height/2);
ctx.font = "bold 20px bangers";
ctx.fillText(subtitle, Game.width/2, Game.height/2 + 40);
}
}
var Enemy = function (blueprint, override) {
this.merge(this.baseParameters);
this.setup(blueprint.sprite, blueprint);
this.merge(override);
var baseParameters = {A: 0, B: 0, C: 0, D: 0, E: 0, F: 0, G: 0, H: 0};
// for (var prop in baseParameters) {
// this[prop] = baseParameters[prop];
// }
// for (var prop in blueprint) {
// this[prop] = blueprint[prop];
// }
// if (override) {
// for (prop in override) {
// this[prop] = override[prop];
// }
// }
// console.log(this.sprite)
// this.w = SpriteSheet.map[this.sprite].w;
// this.h = SpriteSheet.map[this.sprite].h;
// this.t = 0;
}
Enemy.prototype = new Sprite();
Enemy.prototype.type = OBJECT_ENEMY;
Enemy.prototype.baseParameters = {A: 0, B: 0, C: 0, D: 0, E: 0, F: 0, G: 0, H: 0, t: 0,firePercentage: 0.01, reloadTime: 0.75, reload: 0};
Enemy.prototype.step = function (dt) {
this.t += dt;
this.vx = this.A + this.B * Math.sin(this.C * this.t + this.D);
this.vy = this.E + this.F * Math.sin(this.G * this.t + this.H);
this.x += this.vx * dt;
this.y += this.vy * dt;
var collision = this.board.collide(this, OBJECT_PLAYER);
if (collision) {
collision.hit(this.damage);
this.hit(10);
}
if (this.reload <= 0 && Math.random() < this.firePercentage) {
this.reload = this.reloadTime;
if (this.missiles == 2) {
this.board.add(new EnemyMissile(this.x + this.w/2, this.y + this.h/2))
}else{
this.board.add(new EnemyMissile(this.x + this.w/2, this.y + this.h));
};
}
this.reload -= dt;
if (this.y > Game.canvas.height || this.x < -this.w || this.x > Game.canvas.width) {
this.board.remove(this);
}
}
Enemy.prototype.hit = function(damage) {
this.health -= damage;
if (this.health <= 0) {
if (this.board.remove(this)) {
Game.points += this.points || 100;
this.board.add(new Explosion(this.x + this.w/2, this.y +this.h/2));
}
}
}
// Enemy.prototype.draw = function (ctx) {
// SpriteSheet.draw(ctx, this.sprite, this.x, this.y);
// }
var Explosion = function (centerX, centerY, callback) {
this.setup('explosion', {frame: 0});
this.x = centerX - this.w / 2;
this.y = centerY - this.h / 2;
this.subFrame = 0;
this.callback = callback;
}
Explosion.prototype = new Sprite();
Explosion.prototype.step = function (dt) {
this.frame = Math.floor((this.subFrame++) / 3);
if (this.subFrame >= 36) {
this.board.remove(this);
if (this.callback) this.callback();
}
}
var Level = function (levelData, callback) {
this.levelData = [];
for (var i = 0; i < levelData.length; i ++) {
this.levelData.push(Object.create(levelData[i]));
}
this.t = 0;
this.callback = callback;
}
Level.prototype.step = function (dt) {
//console.log(this.levelData)
var idx = 0, remove = [], curShip = null;
this.t += dt * 1000;
while ((curShip = this.levelData[idx]) && (curShip[0] < this.t + 2000)) {
if (this.t > curShip[1]) {
remove.push(curShip);
} else if (curShip[0] < this.t) {
var enemy = enemies[curShip[3]], override = curShip[4];
this.board.add(new Enemy(enemy, override));
curShip[0] += curShip[2];
}
//console.log(curShip)
idx++;
}
for (var i = 0,len = remove.length; i< len; i++) {
var idx = this.levelData.indexOf(remove[i]);
if (idx != -1) this.levelData.splice(idx,1);
}
if (this.levelData.length === 0 && this.board.cnt[OBJECT_ENEMY] === 0) {
if (this.callback) this.callback();
}
}
Level.prototype.draw = function(ctx) {}
var GamePoints = function () {
Game.points = 0;
var pointsLength = 8;
this.draw = function (ctx) {
ctx.save();
ctx.font = "bold 18px arial";
ctx.fillStyle = "#fff";
var txt = "" + Game.points;
var i = pointsLength - txt.length, zeros = "";
while (i-- >0) {zeros += "0"}
ctx.fillText(zeros + txt, 10, 20);
ctx.restore();
};
this.step = function (dt) {}
}
var TouchControls = function () {
var gutterWidth = 10;
var unitWidth = Game.width/5;
var blockWidth = unitWidth - gutterWidth;
this.drawSquare = function (ctx, x, y, txt, on) {
ctx.globalAlpha = on ? 0.9 : 0.6;
ctx.fillStyle = "#ccc";
ctx.fillRect(x, y, blockWidth, blockWidth);
ctx.fillStyle = "#fff";
ctx.textAlign = "center";
ctx.globalAlpha = 1.0;
ctx.font = "bold" + (3 * unitWidth/4) + "px arial";
ctx.fillText(txt, x + blockWidth / 2, y + 3* blockWidth/4 + 5);
}
this.draw = function (ctx) {
ctx.save();
var yLoc = Game.canvas.height - unitWidth;
this.drawSquare(ctx, gutterWidth, yLoc, "\u25c0", Game.keys['left']);
this.drawSquare(ctx, unitWidth + gutterWidth, yLoc, "\u25b6", Game.keys['right']);
this.drawSquare(ctx, Game.canvas.width - gutterWidth - unitWidth, yLoc, "A", Game.keys['fire']);
ctx.restore();
};
this.step = function(dt) {};
this.trackTouch = function (e) {
console.log('fuck')
var touch, x;
e.preventDefault();
Game.keys['left'] = false;
Game.keys['right'] = false;
for (var i = 0; i< e.targetTouches.length; i++) {
touch = e.targetTouches[i];
//console.log(Game.canvasMultiplier)
x = touch.pageX / Game.canvasMultiplier - Game.canvas.offsetLeft;
if (x < unitWidth) {
Game.keys['left'] = true;
}
if (x > unitWidth && x < 2 * unitWidth) {
Game.keys['right'] = true;
}
}
//console.log(e.type)
if (e.type == 'touchstart') {
for (var i = 0; i < e.changedTouches.length; i++) {
touch = e.changedTouches[i];
x = touch.pageX / Game.canvasMultiplier - Game.canvas.offsetLeft;
if (x > 4 * unitWidth) {
Game.keys['fire'] = true;
}
}
}
};
Game.canvas.addEventListener('touchstart', this.trackTouch, false);
Game.canvas.addEventListener('touchmove', this.trackTouch, false);
Game.canvas.addEventListener('touchend', this.trackTouch, false);
Game.canvas.addEventListener('touchcancel', this.trackTouch, false);
Game.playerOffset = unitWidth + 20;
//console.log(unitWidth,Game.playerOffset)
}
var EnemyMissile = function (x, y) {
this.setup('enemy_missile', {vy: 200, damage: 10});
this.x = x - this.w / 2;
this.y = y;
}
EnemyMissile.prototype = new Sprite();
EnemyMissile.prototype.step = function (dt) {
this.y += this.vy * dt;
var collision = this.board.collide(this, OBJECT_PLAYER);
if (collision) {
collision.hit(this.damage);
this.board.remove(this);
} else if (this.y > Game.height) {
this.board.remove(this);
}
};
var sprites = {
ship: {sx: 0, sy: 0, w: 37, h: 42, frames: 1},
missile : {sx: 0, sy: 30, w: 2, h: 10, frames: 1},
enemy_purple : {sx: 37, sy: 0, w:42, h: 43, frames: 1},
enemy_bee: {sx: 79, sy: 0, w: 37, h: 43, frames: 1},
enemy_ship: {sx: 116, sy: 0, w: 42, h: 43, frames: 1},
enemy_circle: {sx: 158, sy:0, w: 32, h: 33, frames: 1},
explosion: {sx: 0, sy: 64, w: 64, h: 64, frames: 12},
enemy_missile :{sx: 9, sy: 42, w:3, h: 20, frame: 1}
};
var level1 = [
[0, 4000, 500, 'step'],
[6000, 13000, 800, 'ltr'],
[12000, 16000,400, 'circle'],
[18200, 20000, 500, 'straight', {x: 150}],
[18200, 20000, 500, 'straight', {x: 100}],
[18400, 20000, 500, 'straight', {x: 200}],
[22000, 25000, 400, 'wiggle', {x: 300}],
[22000, 25000, 400, 'wiggle', {x: 200}],
]
var playGame = function () {
//Game.setBoard(3, new PlayerShip());
var board = new GameBoard();
board.add(new PlayerShip());
//board.add(new Player)
board.add(new Level(level1, winGame));
// board.add(new Enemy(ememies.basic));
// board.add(new Enemy(ememies.basic, {x: 200}));
Game.setBoard(5, new GamePoints(0));
Game.setBoard(3, board);
}
var winGame = function() {
Game.setBoard(3, new TitleScreen('你赢了','点击重新游戏', playGame));
}
var loseGame = function () {
Game.setBoard(3, new TitleScreen("你输了",'点击重新游戏',playGame))
}
// var ememies = {basic: {x:100, y: -50, sprite: 'enemy_purple',B: 100, C: 2, E: 100, health: 20}};
// var enemies = {
// straight: {x: 0, y: -50, sprite: 'enemy_ship', health: 10, E: 100},
// 'ltr': {x: 0, y: -100, sprite: 'enemy_purple', health: 10, B: 200, C: 1, E: 200},
// circle: {x: 400, y:-50, sprite: 'enemy_circle', health: 10, A: 0, B: -200, C: 1, E: 20, F: 200, G: 1, H: Math.PI/2},
// wiggle: {x: 0, y: -50, sprite: 'enemy_bee', health: 20, B: 100, C: 4, E :100},
// step: {x: 0, y:-50, sprite: 'enemy_circle', health: 10, B:300, C: 1.5, E: 60}
// }
var enemies = {
straight: { x: 0, y: -50, sprite: 'enemy_ship', health: 10,
E: 100,firePercentage: 0.001 },
ltr: { x: 0, y: -100, sprite: 'enemy_purple', health: 10,
B: 75, C: 1, E: 100 ,missile:2 },
circle: { x: 250, y: -50, sprite: 'enemy_circle', health: 10,
A: 0, B: -100, C: 1, E: 20, F: 100, G: 1, H: Math.PI/2 },
wiggle: { x: 100, y: -50, sprite: 'enemy_bee', health: 20,
B: 50, C: 4, E: 100, firePercentage: 0.001, missile: 2 },
step: { x: 0, y: -50, sprite: 'enemy_circle', health: 10,
B: 150, C: 1.2, E: 75 }
};
var startGame = function() {
//SpriteSheet.draw(Game.ctx, "ship", 100, 100, 0);
Game.setBoard(0, new Starfield(20, 0.4, 100, true));
Game.setBoard(1, new Starfield(50, 0.6, 100));
Game.setBoard(2, new Starfield(100, 1, 50));
Game.setBoard(3, new TitleScreen("打飞机", "单击开始", playGame))
}
window.addEventListener("load", function(){
Game.initialize("game", sprites, startGame);
});