认识HTML5和Canvas
最近我学到了点HTML5和Canvas的东西。说白了，它们就是咱们做网页时经常要用到的那两样工具。HTML5，就是更新后的HTML，有好多好用的新功能；Canvas？也挺厉害的，它是HTML5里面的一环，能让你用 JavaScript 画出各种图形。这样子，大家在做网页的时候就能有更多的创意空间！
var Resource = Class.create();
$.extend(Resource.prototype, {
initialize: function () { },
Images: [
{ path: 'img/bg1.png', x: 0, y: 0, w: 800, h: 480, data: null, type: 61, visible: true },
{ path: 'img/BeiMian.jpg', x: 320, y: 5, w: 100, h: 121, data: null, type: 62, visible: true },
{ path: 'img/btn.jpg', x: 300, y: 281, w: 140, h: 50, data: null, type: 63, visible: true, text: '开始', textX: 366, textY: 310 },
{ x: 0, y: 0, type: 66, isText: true, visible: false },
{ path: 'img/1.jpg', data: null, type: 16, visible: false },
{ path: 'img/2.jpg', data: null, type: 17, visible: false },
{ path: 'img/3.jpg', data: null, type: 3, visible: false, se: 1 },
{ path: 'img/4.jpg', data: null, type: 4, visible: false, se: 1 },
{ path: 'img/5.jpg', data: null, type: 5, visible: false, se: 1 },
{ path: 'img/6.jpg', data: null, type: 6, visible: false, se: 1 },
{ path: 'img/7.jpg', data: null, type: 7, visible: false, se: 1 },
{ path: 'img/8.jpg', data: null, type: 8, visible: false, se: 1 },
{ path: 'img/9.jpg', data: null, type: 9, visible: false, se: 1 },
{ path: 'img/10.jpg', data: null, type: 10, visible: false, se: 1 },
{ path: 'img/11.jpg', data: null, type: 11, visible: false, se: 1 },
{ path: 'img/12.jpg', data: null, type: 12, visible: false, se: 1 },
{ path: 'img/13.jpg', data: null, type: 13, visible: false, se: 1 },
{ path: 'img/14.jpg', data: null, type: 14, visible: false, se: 1 },
{ path: 'img/15.jpg', data: null, type: 15, visible: false, se: 1 },
{ path: 'img/16.jpg', data: null, type: 3, visible: false, se: 4 },
{ path: 'img/17.jpg', data: null, type: 4, visible: false, se: 4 },
{ path: 'img/18.jpg', data: null, type: 5, visible: false, se: 4 },
{ path: 'img/19.jpg', data: null, type: 6, visible: false, se: 4 },
{ path: 'img/20.jpg', data: null, type: 7, visible: false, se: 4 },
{ path: 'img/21.jpg', data: null, type: 8, visible: false, se: 4 },
{ path: 'img/22.jpg', data: null, type: 9, visible: false, se: 4 },
{ path: 'img/23.jpg', data: null, type: 10, visible: false, se: 4 },
{ path: 'img/24.jpg', data: null, type: 11, visible: false, se: 4 },
{ path: 'img/25.jpg', data: null, type: 12, visible: false, se: 4 },
{ path: 'img/26.jpg', data: null, type: 13, visible: false, se: 4 },
{ path: 'img/27.jpg', data: null, type: 14, visible: false, se: 4 },
{ path: 'img/28.jpg', data: null, type: 15, visible: false, se: 4 },
{ path: 'img/29.jpg', data: null, type: 3, visible: false, se: 3 },
{ path: 'img/30.jpg', data: null, type: 4, visible: false, se: 3 },
{ path: 'img/31.jpg', data: null, type: 5, visible: false, se: 3 },
{ path: 'img/32.jpg', data: null, type: 6, visible: false, se: 3 },
{ path: 'img/33.jpg', data: null, type: 7, visible: false, se: 3 },
{ path: 'img/34.jpg', data: null, type: 8, visible: false, se: 3 },
{ path: 'img/35.jpg', data: null, type: 9, visible: false, se: 3 },
{ path: 'img/36.jpg', data: null, type: 10, visible: false, se: 3 },
{ path: 'img/37.jpg', data: null, type: 11, visible: false, se: 3 },
{ path: 'img/38.jpg', data: null, type: 12, visible: false, se: 3 },
{ path: 'img/39.jpg', data: null, type: 13, visible: false, se: 3 },
{ path: 'img/40.jpg', data: null, type: 14, visible: false, se: 3 },
{ path: 'img/41.jpg', data: null, type: 15, visible: false, se: 3 },
{ path: 'img/42.jpg', data: null, type: 3, visible: false, se: 2 },
{ path: 'img/43.jpg', data: null, type: 4, visible: false, se: 2 },
{ path: 'img/44.jpg', data: null, type: 5, visible: false, se: 2 },
{ path: 'img/45.jpg', data: null, type: 6, visible: false, se: 2 },
{ path: 'img/46.jpg', data: null, type: 7, visible: false, se: 2 },
{ path: 'img/47.jpg', data: null, type: 8, visible: false, se: 2 },
{ path: 'img/48.jpg', data: null, type: 9, visible: false, se: 2 },
{ path: 'img/49.jpg', data: null, type: 10, visible: false, se: 2 },
{ path: 'img/50.jpg', data: null, type: 11, visible: false, se: 2 },
{ path: 'img/51.jpg', data: null, type: 12, visible: false, se: 2 },
{ path: 'img/52.jpg', data: null, type: 13, visible: false, se: 2 },
{ path: 'img/53.jpg', data: null, type: 14, visible: false, se: 2 },
{ path: 'img/54.jpg', data: null, type: 15, visible: false, se: 2 }
]
});
尝试写斗地主Demo
刚搞定HTML5跟Canvas，我就马上试着把demo上的材料拼成了个斗地主小游。有好些按钮啊、文字啥的，还有54张牌，都是做小游戏必不可少的东西。别看我现在的代码还没整理好，但是自己亲手实践学到的东西还是挺让人开心的~
Resource.Images素材数组
Resource.Images这个大宝库里面有很多游戏要用到的稀奇古怪的东西，比如按钮，文字，还有漂亮的背景图和整整54张卡牌！有了它们，我们就能让游戏看起来更炫酷~
var Labels = Class.create();
$.extend(Labels.prototype, {
initialize: function (cxt) {
this.cxt = cxt;
},
setText: function (text, postion) {
this.cxt.font = 'bold 20px serif';
this.cxt.fillStyle = '#000000';
this.cxt.textAlign = 'center';
this.cxt.fillText(text, postion.x, postion.y);
}
});
Lables类介绍
我用Canvas画布画文本就好像做UI展示的帽子，必不可少。有个叫Labels类的小帮手，专门帮你在Canvas上搞文字，设置字体、字号和颜色，想显示啥就显示啥。而它里面的setText方法，就是指挥这些文字按你说的办。
initEvt初始化事件
在Canvas里弄点击事件比普通的DOM元素麻烦点。因为Canvas是用一帧一帧画出来的，不像别的元素那么直观，你得特别一点来处理这个事儿。initEvt就是处理这个事儿的娃，先算出鼠标在Canvas上的大概位置，然后结合每个东西自己的坐标和大小，看点击地方在不在他们里面就对了。
onControlClick处理点击事件
var DdZGame = Class.create();
DdZGame.Statics = { DealedNums: 0, isLeftFirstDeal: true };
$.extend(DdZGame.prototype, {
initialize: function () {
DdZGame.Statics.IsGetLander = false;
DdZGame.Statics.DealTime = 66;
this.leftPokers = [];
this.rightPokers = [];
this.myPokers = [];
this.LastPokers = [];//最后3张牌
this.leftPlays = [];
this.rightPlays = [];
this.myPlays = [];
this.myBtnPostion = { y: 245, x: 162 };
this.isStart = false;
this.Res = new Resource();
this.allPokers = new Array();
this.Lander = 0;//地主,1右边,2My,3左边
this.isGetLander = {};
this.GmCanvas = document.getElementById('gmCanvas');
this.cxt = this.GmCanvas.getContext('2d');
this.Lbl = new Labels(this.cxt);
this.init();
this.initEvt();
},
initEvt: function () {
this.GmCanvas.onclick = $.proxy(function (e) {
var box = this.GmCanvas.getBoundingClientRect();
DdZGame.Statics.MousePostion = { x: e.pageX - box.left, y: e.pageY - box.top };
this.onControlClick();
}, this);
},
onControlClick: function () {
var isClick = false;
for (var i = 0; i = c.x && postion.x = c.y && postion.y <= c.y + c.h) {
c.onClick();
isClick = true;
break;
}
}
}
if (!isClick) {
for (var i = 0; i = c.x && postion.x = c.y && postion.y <= c.y + c.h) {
c.onClick();
isClick = true;
break;
}
}
}
}
},
loadImages: function (callback) {
var loadedNums = 0;
var totalNums = this.Res.Images.length - 1;
this.Controls = [];
$.each(this.Res.Images, $.proxy(function (i, o) {
if (!o.path) {
return true;
}
o.data = new Image();
o.data.src = o.path;
o.data.onload = $.proxy(function () {
if (o.type = totalNums) {
callback.call(this);
}
}, this);
}, this));
},
drawImage: function (callback, isUnVisibleLast) {//isVisibleLast 是否让底牌不可见
$.each(this.Controls, $.proxy(function (i, o) {
if (!o.visible)
return true;
if (o.type == 62) {
var x = 0;
for (var i = 0; i 0) {
var o = arry[0];
var x = 0, y = 0;
if (!DdZGame.Statics[direction]) {
DdZGame.Statics[direction] = this[direction];
}
if (!o.x) {
x = DdZGame.Statics[direction].x;
y = DdZGame.Statics[direction].y;
o.x = this[direction].x;
o.y = this[direction].y;
}
else {
x = o.x;
y = o.y;
}
if (!o.visible) {
return true;
}
o.w = 18;
o.h = 129;
if (arry.length == 1) {
o.w = 105;
o.h = 150;
}
var img = o.data;
if (isBeiMian) {
img = beiMain.data;
}
else if (direction == 'myPannel') {
o.onClick = $.proxy(function () {
if (!this.isStart)
return;
if (!o.isPlay) {
o.isPlay = true;
o.y -= 30;
}
else {
o.isPlay = false;
o.y += 30;
}
DdZGame.Statics.DealTime = 0;
this.drawImage();
}, this);
}
this.cxt.drawImage(img, x, y);
DdZGame.Statics[direction][axis] += identiy;
arry.splice(0, 1);
if (DdZGame.Statics.DealTime > 0)
DdZGame.Statics[direction + 'handle'] = setTimeout($.proxy(function () {
DrawPokers.call(this, arry, direction, isBeiMian, identiy, axis);
}, this), DdZGame.Statics.DealTime);
else
DrawPokers.call(this, arry, direction, isBeiMian, identiy, axis);
}
else if (DdZGame.Statics[direction + 'handle'] || DdZGame.Statics.DealTime == 0) {
clearTimeout(DdZGame.Statics[direction + 'handle']);
if (direction == 'leftPannel' && copyLeftPokers.length == 0) {
isDealEndLeft = true;
}
if (direction == 'rightPannel' && copyRightPokers.length == 0) {
isDealEndRight = true;
}
if (direction == 'myPannel' && copyMyPokers.length == 0) {
isDealEndMy = true;
}
if (direction == 'lastPannel' && copyLastPokers.length == 0) {
isDealEndLast = true;
}
if (isDealEndLeft && isDealEndRight && isDealEndMy && isDealEndLast) {
/*发牌完毕*/
/*抢地主*/
if (callback)
callback();
}
}
};
DrawPokers.call(this, copyLeftPokers, 'leftPannel', true, 26, 'y');
DrawPokers.call(this, copyRightPokers, 'rightPannel', true, 26, 'y');
DrawPokers.call(this, copyMyPokers, 'myPannel', false, 19, 'x');
DrawPokers.call(this, copyLastPokers, 'lastPannel', isUnVisibleLast, 126, 'x');
},
init: function () {
this.loadImages(this.drawImage);
},
Dealing: function () {//发牌
this.leftPannel = { x: 5, y: 18 };
this.rightPannel = { x: 691, y: 18 };
this.myPannel = { x: 198, y: 330 };
this.lastPannel = { x: 243, y: 5 };
if (DdZGame.Statics.DealedNums >= 51) { //发牌完毕
$.each(this.allPokers, $.proxy(function (i, o) {
o.visible = true;
this.LastPokers.push(o);
}, this));
this.myPokers.sort(function (a, b) {
if (a.type != b.type)
return b.type - a.type;
return b.se - a.se;
});
$.grep(this.Res.Images, $.proxy(function (o, i) { return o.type == 62; }, this))[0].visible = false;
this.drawImage($.proxy(function () { this.GetLander(); }, this), true);
}
else {
/*1、left*/
var index = Math.floor(Math.random() * (this.allPokers.length - 1) + 0);
var c = this.allPokers.splice(index, 1);
c[0].visible = true;
this.leftPokers.push(c[0]);
DdZGame.Statics.DealedNums++;
/*2、right*/
index = Math.floor(Math.random() * (this.allPokers.length - 1) + 0);
c = this.allPokers.splice(index, 1);
c[0].visible = true;
this.rightPokers.push(c[0]);
DdZGame.Statics.DealedNums++;
index = Math.floor(Math.random() * (this.allPokers.length - 1) + 0);
c = this.allPokers.splice(index, 1);
c[0].visible = true;
this.myPokers.push(c[0]);
DdZGame.Statics.DealedNums++;
this.Dealing();
}
},
GetLander: function (firstGet, minScore, curScore) {
/*随机出谁先叫地主*/
//if (curScore && !this.isGetLander[1] && !this.isGetLander[2] && !this.isGetLander[3]) {
// //**Game Over !
// alert('无人抢地主');
// return;
//}
var postion = { 1: { y: 100, x: 640 }, 3: { y: 100, x: 126 }, 2: { x: 216, y: 297 } };
if (!curScore) {
if (!minScore)
minScore = 1;
if (!firstGet)
firstGet = Math.floor(Math.random() * (3 - 1 + 1) + 1);
if (firstGet == 1 || firstGet == 3) { //电脑抢地主
if (this.isGetLander[firstGet] == -1 || this.isGetLander[firstGet]) {
$.each(this.Controls, $.proxy(function (i, o) {
if (o.Lander) {
o.visible = false;
}
}, this));
var max = 0;
if (this.isGetLander[1] > this.isGetLander[2]) {
max = this.isGetLander[1];
this.Lander = 1;
}
else {
max = this.isGetLander[2];
this.Lander = 2;
}
if (max this.isGetLander[2]) {
max = this.isGetLander[1];
this.Lander = 1;
}
else {
max = this.isGetLander[2];
this.Lander = 2;
}
if (max this.isGetLander[2]) {
max = this.isGetLander[1];
this.Lander = 1;
}
else {
max = this.isGetLander[2];
this.Lander = 2;
}
if (max < this.isGetLander[3]) {
max = this.isGetLander[3];
this.Lander = 3;
}
if (max == 0) {
alert('Game Over !');
return;
}
var txt = max + '分';
var t = {};
var tObj = $.grep(this.Res.Images, function (o, i) { return o.type == 66; })[0];
$.extend(t, tObj);//复制对象
if (this.CurScore == 4) {
txt = '不抢';
}
t.text = txt;
t.x = postion[this.Lander].x;
t.y = postion[this.Lander].y;
t.visible = true;
this.Controls.push(t);
//DdZGame.Statics.DealTime = 0;
//this.drawImage($.proxy(function () { this.Play(this.Lander, '抢地主啊'); }, this), false);
this.FanDiPai(this.Lander);
return;
}
//if (DdZGame.Statics.IsGetLander) {
// return;
//}
//DdZGame.Statics.IsGetLander = true;//是否在抢地主
console.log('我抢地主');
var btnObj = $.grep(this.Res.Images, $.proxy(function (o, i) {
return o.type == 63;
}, this))[0];
if (!this.CurScore) {
this.CurScore = 0;
}
var txtX = 0;
for (var i = 1; i this.CurScore) {
var btn = {};
$.extend(btn, btnObj);
btn.text = i + '分';
btn.x = this.myBtnPostion.x;
btn.y = this.myBtnPostion.y;
btn.visible = true;
btn.type = 63;
btn.textX = this.myBtnPostion.x + 30;
btn.textY = 286;
btn.h = 50;
btn.w = 81;
btn.Lander = true;
btn.onClick = (function (i, obj) { return function () { obj.GetLander(3, i + 1, i); }; })(i, this)
DdZGame.Statics.DealTime = 0;
this.Controls.push(btn);
this.myBtnPostion.x += btn.w + 10;
}
}
if (DdZGame.Statics.DealTime == 0) {
var btn = {};
$.extend(btn, btnObj);
btn.text = '不抢';
btn.x = this.myBtnPostion.x;
btn.y = this.myBtnPostion.y;
btn.visible = true;
btn.type = 63;
btn.textX = this.myBtnPostion.x + 30;
btn.textY = 286;
btn.h = 50;
btn.w = 81;
btn.Lander = true;
btn.onClick = $.proxy(function () { this.GetLander(3, minScore, 4); }, this);
this.Controls.push(btn);
this.drawImage(null, true);
}
},
FanDiPai: function (lander) {//翻底牌
DdZGame.Statics.DealTime = 0;
var p = '';
if (lander == 1) {
p = 'rightPokers';
}
else if (lander == 2) {
p = 'myPokers';
}
else if (lander == 3) {
p = 'leftPokers';
}
/*谁抢到地主,底牌归谁*/
$.each(this.LastPokers, $.proxy(function (i, o) {
var c = {};
$.extend(c, o);
c.x = null;
c.y = null;
this[p].push(c);
test = c.path;
}, this));
if (lander == 2) {
this.myPokers.sort(function (a, b) {
a.x = null;
a.y = null;
b.x = null;
b.y = null;
if (a.type != b.type)
return b.type - a.type;
return b.se - a.se;
});
this.myPannel = { x: 198, y: 330 };
DdZGame.Statics['myPannel'] = null;
}
this.drawImage($.proxy(function () { this.isStart = true; this.Play(lander, '是地主啊'); }, this), false);
},
Play: function (lander, msg) {//出牌
//alert('');
}
});
好，这个onControlClick函数就是看你在哪儿点，然后看看那里有什么东西。如果有个能被点击的东西（虽然不是真正意义上的DOM事件），而且还定义了onclick函数的话，那就把定义在那个元素里头的onclick函数给叫出来干活啰！这样咱们就可以在Canvas里玩点交互游戏咯。
loadImages加载图片资源
“loadImages”这个程序就是我们装载游戏要用到的那些漂亮图片的。等这些图片全装好了，就可以开始在那个Canvas画板上弄点最初级的东西了。不过得先等图片装满了内存，这样我们才能保证玩游戏时能看见图片，然后在Canvas上实现我们的想象力画图了。
init初始化操作
最后是Init函数，它会先叫LoadImages把我们要用的图全给传进来，等图全好了再去画初始那些元素到Canvas里面。这样的话，所有图肯定都到位了，初始化的活也都搞定了，就可以开始一步步玩游戏！
学了HTML5和Canvas，尝试用Demo上的资源搞个斗地主，真是感觉到技术实战的紧密关系。虽然现在的代码还没整好，试过几次都碰壁，不过我知道，只要慢慢摸索、多想想，总会进步的，也能尽可能把这个小玩意弄好点。
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