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person.js
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person.js
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/**
* Created by wuguoyuan on 2016/6/22.
*/
function person(option) {
this._init(option);
}
person.prototype = {
_init: function (option) {
//五个键位
this.left = option.left,
this.up = option.up,
this.right = option.right,
this.down = option.down,
this.fireKey = option.fireKey,
this.width = option.width;//绘制小人图片的宽度
this.height = option.height;//绘制小人图片的高度
this.x = option.x;//小人初始化坐标
this.y = option.y;
this.imgSrc = option.imgSrc;//小人图片
this.speed = option.speed;//速度
this.dirNum = 0;//方向标识，即纵向人物图片切换索引
this.step = option.step;//步长
this.stepX = 0;//水平方向已走的路程
this.stepY = 0;//垂直方向已走的路程
this.fImg = option.fImg;//子弹图片
},
render: function (ctx) {
var img = new Image();
var _this = this;
img.src = this.imgSrc;
img.onload = function () {
var index = 0;//是横向人物图片切换索引
var originX = _this.x;
var originY = _this.y;
setInterval(function () {
ctx.beginPath();
ctx.clearRect(_this.x, _this.y, _this.width, _this.height);
_this.x = originX + _this.stepX;
_this.y = originY + _this.stepY;
ctx.drawImage(
img,
_this.width * index,
_this.height * _this.dirNum,
_this.width,
_this.height,
_this.x,
_this.y,
_this.width,
_this.height
);
index++;
index %= 4;
}, 1000 / _this.speed)
}
this.anKey(_this.left,_this.up,_this.right,_this.down,_this.fireKey);
},
anKey: function (a,b,c,d,f) {
var _this = this;
document.addEventListener('keydown',function (e) {
//对于偶尔出现的人物跑出界，是按键延时，图片尺寸和步长的倍数不等于canvas的尺寸
var e = e || window.event;
if (e && (e.keyCode == a)) {
_this.move(1, 'x', 0)
}
if (e && (e.keyCode == b)) {
_this.move(3, 'y', 0)
}
if (e && (e.keyCode == c)) {
_this.move(2, 'x', 600)
}
if (e && (e.keyCode == d)) {
_this.move(0, 'y', 600)
}
if (e && (e.keyCode == f)) {
_this.fire(_this.fImg);
}
})
},
//dirNum方向标识，即纵向人物图片切换索引,flag标记是x轴还是y轴的移动，size是边界的位置,tank表示是坦克移动
move: function (dirNum, flag, size,tank) {
this.dirNum = dirNum;
if (dirNum === 1 || dirNum === 3) {
if (flag === 'x') {
if (this.x <= size) {
console.log(this.x);
if(tank =='tank'){
dirNum++;
}
return;
}
this.stepX -= this.step;
}
if (flag === 'y') {
if (this.y <= size) {
console.log(this.y);
return;
}
this.stepY -= this.step;
}
}
if (dirNum === 0 || dirNum === 2) {
if (flag === 'x') {
if (this.x + this.width >= size) {
console.log(this.x + this.width)
return;
}
this.stepX += this.step;
}
if (flag === 'y') {
if (this.y + this.height >= size) {
console.log(this.y + this.height)
return;
}
this.stepY += this.step;
}
}
},
fire: function (fImg) {
var bullet = new Image();
bullet.src = fImg;
var _this = this;
bullet.onload = function () {
_this.fireMove(bullet, 5);
}
},
fireMove: function (bullet,speed) {
var bulletX = this.x;
var bulletY = this.y;
var _this = this;
var timer;
var k = 0;
var bWidth = bullet.width/4;
var padiingX = (_this.width-bWidth)/2;//子弹与人物x轴的距离
var padiingY = (_this.height-bullet.height)/2;//子弹与人物y轴的距离
if (_this.dirNum === 1) {
timer = setInterval(function () {
ctx.clearRect(bulletX - bWidth, bulletY+padiingY, bWidth, bullet.height);
bulletX -= speed;
ctx.drawImage(
bullet,
(bWidth) * k,
0,
bWidth,
bullet.height,
bulletX - bWidth,
bulletY+padiingY,
bWidth,
bullet.height
);
k++;
k %= 4;
if (bulletX - bWidth <= 0) {
clearInterval(timer);
ctx.clearRect(bulletX - bWidth, bulletY+padiingY, bWidth, bullet.height)
}
}, 10)
}
if(_this.dirNum ===3){
timer = setInterval(function () {
ctx.clearRect(bulletX+padiingX, bulletY-bullet.height, bWidth, bullet.height);
bulletY -= speed;
ctx.drawImage(
bullet,
(bWidth) * k,
0,
bWidth,
bullet.height,
bulletX+padiingX,
bulletY-bullet.height,
bWidth,
bullet.height
);
k++;
k %= 4;
if (bulletY-bullet.height <= 0) {
clearInterval(timer);
ctx.clearRect(bulletX+padiingX, bulletY-bullet.height, bWidth, bullet.height)
}
}, 10)
}
if(_this.dirNum ===2){
timer = setInterval(function () {
ctx.clearRect(bulletX + _this.width, bulletY+padiingY, bWidth, bullet.height);
bulletX += speed;
ctx.drawImage(
bullet,
(bWidth) * k,
0,
bWidth,
bullet.height,
bulletX + _this.width,
bulletY+padiingY,
bWidth,
bullet.height
);
k++;
k %= 4;
if (bulletX + _this.width+bWidth >= 600) {
console.log(bulletX + _this.width+bWidth)
clearInterval(timer);
ctx.clearRect(bulletX + _this.width, bulletY+padiingY, bWidth, bullet.height)
}
}, 10)
}
if(_this.dirNum ===0){
timer = setInterval(function () {
ctx.clearRect(bulletX+padiingX, bulletY+_this.height, bWidth, bullet.height);
bulletY += speed;
ctx.drawImage(
bullet,
(bWidth) * k,
0,
bWidth,
bullet.height,
bulletX+padiingX,
bulletY+_this.height,
bWidth,
bullet.height
);
k++;
k %= 4;
if (bulletY+_this.height+bullet.height >= 600) {
console.log(bulletY + _this.height + bullet.height);
clearInterval(timer);
ctx.clearRect(bulletX+padiingX, bulletY+_this.height, bWidth, bullet.height)
}
}, 10)
}
}
}