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flybird.html
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flybird.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>笨鸟先飞</title>
</head>
<body>
<canvas id="canvas" width="400px" height="600px"></canvas>
<button id="btn">暂停游戏</button>
<script>
//-------------------------插入小鸟-----------------------------------------------------------------------------------
var birdArr = ["images/0.gif", "images/1.gif", "images/2.gif"];
function Bird(x, y, width, height, img_srcs) {
this.bx = x;
this.by = y;
this.bw = width;
this.bh = height;
this.imgs = img_srcs;
this.draw = flybird;
}
var i = 0;
function flybird() {
i++;
i = i % 3;
var birds = new Image();
birds.src = this.imgs[i];
console.log(birds.src);
canvas.drawImage(birds, this.bx, this.by, this.bw, this.bh);//bird 小鸟的路径 150 250 小鸟的起始位置
}
var bird = new Bird(150, 250, 40, 40, birdArr);
//---------------------------------------------插入管子（上）-------------------------------------------
function ShangPipe(x, y, width, height, img_src) {
this.px = x;
this.py = y;
this.pwidth = width;
this.pheight = height;
var imag = new Image();
imag.src = img_src;
this.img = imag;
this.draw = drawShangPipe;
}
function drawShangPipe() {
canvas.drawImage(this.img, 150, 500, 150, 800, this.px, this.py, this.pwidth, this.pheight);
}
var shang_pipe = new ShangPipe(0, 0, 100, 200, "images/pipe.png");//上管道
//---------------------------------插入管子（下）------------------------------
//var downPipe = 400;
function XiaPipe(x, y, width, height, img_src) {
this.px = x;
this.py = y;
this.pwidth = width;
this.pheight = height;
var imag = new Image();
imag.src = img_src;
this.img = imag;
this.draw = drawXiaPipe;
}
function drawXiaPipe() {
canvas.drawImage(this.img, 0, 500, 150, 500, this.px, this.py, this.pwidth, this.pheight);
}
var xia_pipe = new XiaPipe(0, 400, 100, 200, "images/pipe.png");//下管道
//------------------------------------------地面---------------------------------------
function Background(x, y, width, height, img_src) {
this.bgx = x;
this.bgy = y;
this.bgwidth = width;
this.bgheight = height;
var image = new Image(); //图片对象
image.src = img_src;
this.img = image;
this.draw = function () {
// drawImage() 绘制图片
// 第一个参数：绘制的image对象
// 第2~5个参数：绘制的位置和大小
canvas.drawImage(this.img, this.bgx, this.bgy, this.bgwidth, this.bgheight);
}
}
var ground = new Background(0, 550, 400, 200, "images/ground.png"); //地面
//----------------------------------获取画布 插入背景图片-------------------------------------------------
var canvas = document.getElementById("canvas").getContext("2d");
var image1 = new Image();
image1.src = "images/bg.png";
function grounddraw() {
canvas.drawImage(image1, 0, 0, 400, 600);//400 600 压缩图片大小
}
//---------------------------------设置上下管道的长度变化----------------------------------------------------
/*
var pipe_height = 200；
上管道和下管道的 x 是一样的
up_pipe.px = 400;
down_pipe.px = 400;
上管道的height + 中间差距200 = 下管道的 y 位置 down_pipe.py = up_pipe.pheight + pipe_height;
所以下管道的高度为 down_pipe.pheight = 600 - down_pipe.py;
*/
var v = 20;//管道移动速度
var pipe_height = 200;//管道中间的间距
function Guandao() {
if (shang_pipe.px + shang_pipe.pwidth > 0) {
shang_pipe.px -= v;
xia_pipe.px -= v;
} else {
shang_pipe.px = 400;
xia_pipe.px = 400;
shang_pipe.pheight = 100 + 200 * Math.random();
//100~300随机数
xia_pipe.py = shang_pipe.pheight + pipe_height;
xia_pipe.pheight = 600 - xia_pipe.py;
isScore = true;
}
}
//------------------------------------设置小鸟下降---------------------------------------------
var v1 = 10;
var v2 = 0;
var a = 2;
var s = 0;
function birddown() {
v2 = v1 + a;
bird.by += (v1 + v2) / 2;
}
//------------------------------------设置点击空格小鸟上升---------------------------------------------
window.onkeydown = function onkey(event) {
var e = event || window.event;
if (e.keyCode == 32) {
bird.by -= 80;
}
};
//------------------------------------------小鸟碰撞检测-------------------------------------
var tid;
function gameover() {//鸟碰到上管道//鸟碰到地面//鸟碰到天空
if (bird.by + bird.bh > ground.bgy
|| bird.by < 0
|| ((bird.bx + bird.bw > shang_pipe.px) && (bird.bx < shang_pipe.px + shang_pipe.pwidth) && (bird.by < shang_pipe.py + shang_pipe.pheight) && (bird.by + bird.bh > shang_pipe.py))
|| ((bird.bx + bird.bw > xia_pipe.px) && (bird.by + bird.bh > xia_pipe.py) && (bird.bx < xia_pipe.px + xia_pipe.pwidth) && (bird.by < xia_pipe.py + xia_pipe.pheight))) {
clearInterval(tid);
canvas.fillStyle = "rgb(135,250,205)";
canvas.font = "30px Accent";
canvas.fillText("score is：" +score, 160, 150);
return;
}
Guandao();//管道移动
birddown();//移动小鸟
Score();
}
//-----------------------------设置得分----------------------------------------------------------
var score = 0;
var isScore = false;
function Score() {
if (isScore && bird.bx > shang_pipe.px + shang_pipe.pwidth) {
score++;
isScore = false;
if (score > 0 && score % 12 == 0) {
v=v+13; //成绩每过10分就加速一次
}
}
canvas.fillStyle = "rgb(135,250,205)";
canvas.font = "30px Accent";
if (score > 0) {
canvas.fillText(score, 160, 150);
}
}
var but = document.getElementById("btn");
but.onclick = function(){
console.log("定时器" +tid +"已暂停");
clearInterval(tid);
}
//------------------------------整体函数----------------------------------------------------------------
function draw() {
canvas.clearRect(0, 0, 400, 600);
grounddraw();//画地面
shang_pipe.draw();//画上管道
xia_pipe.draw();//画下管道
bird.draw();//画小鸟
ground.draw();//画地面
gameover();// 碰撞检测 （内置 管道移动和小鸟移动）
}
tid = setInterval(draw, 100);
</script>
</body>
</html>