前端开发者web前端开发工作条件 前端开发工作的展开 前端开发找工作群
颜色差距会随着正确次数越多而逐渐缩小。
html 代码
<html>
<head>
<title>找不同色块的游戏 不限时 总共60关</title>
<style>
body {
padding: 0;
margin: 0;
width: 100%;
height: 100%;
background-color: #f3f3f3;
overflow: hidden;
display: table;
}
div {
display: table-cell;
vertical-align: middle;
text-align: center;
}
</style>
</head>
<body>
<div>
<canvas id=’canvas’>您的浏览器不支持canvas</canvas>
</div>
<script>
canvas = document.getElementById(‘canvas’)
size = window.innerWidth < window.innerHeight ? window.innerWidth : window.innerHeight
canvas.width = size
canvas.height = size
ctx = canvas.getContext(‘2d’)
var rank = 0, n = 2
targetX = parseInt(Math.random() * n)
targetY = parseInt(Math.random() * n)
addRect()
canvas.onclick = function (e) {
bcr = canvas.getBoundingClientRect()
clickX = e.clientX – bcr.left * (canvas.width / bcr.width)
clickY = e.clientY – bcr.top * (canvas.height / bcr.height)
if (checkArea(clickX, clickY)) {
rank++
ctx.clearRect(0, 0, size, size)
if (rank >= 60) {
alert(“天才，你已经通关了，得分为” + rank + “分”)
rank = 0
n = 2
} else if (n < 8) {
n++
}
} else {
alert(“游戏结束，你的分数为：” + rank + “分”)
ctx.clearRect(0, 0, size, size)
rank = 0
n = 2
}
targetX = parseInt(Math.random() * n)
targetY = parseInt(Math.random() * n)
addRect()
}
//判断点击的位置是否为不同色块所在区域
function checkArea(clickX, clickY) {
beginX = size * targetX / n
endX = size * (targetX + 1) / n
beginY = size * targetY / n
endY = size * (targetY + 1) / n
if (clickX >= beginX && clickX <= endX && clickY >= beginY && clickY <= endY) {
return true
} else {
return false
}
}
//向canvas添加多个矩形
function addRect() {
itemSize = size / n
rectSize = itemSize – size * 0.06 / n
rectPadding = size * 0.03 / n
rectRadius = size * 0.1 / n
colorArr = setColor()
color = colorArr.color
scolor = colorArr.scolor
for (var x = 0; x < n; x++) {
for (var y = 0; y < n; y++) {
if (x != targetX || y != targetY) {
drawRect(color, x * itemSize + rectPadding, y * itemSize + rectPadding, rectSize, rectSize, rectRadius)
} else {
drawRect(scolor, x * itemSize + rectPadding, y * itemSize + rectPadding, rectSize, rectSize, rectRadius)
}
}
}
}
//画圆角矩形，r为圆角半径
function drawRect(color, x, y, w, h, r) {
ctx.beginPath()
ctx.moveTo(x – r, y)
ctx.arcTo(x + w, y, x + w, y + h, r)
ctx.arcTo(x + w, y + h, x, y + h, r)
ctx.arcTo(x, y + h, x, y, r)
ctx.arcTo(x, y, x + r, y, r)
ctx.fillStyle = color
ctx.fill()
}
//颜色配置
function setColor() {
rgbArr = [parseInt(Math.random() * 100 + 150), parseInt(Math.random() * 250), parseInt(Math.random() * 200)]
rgbArr.sort(randomsort);
red = rgbArr[0]
green = rgbArr[1]
blue = rgbArr[2]
//设置颜色数字变化范围
if (Math.random() > 0.5) {
index = parseInt((100 – rank) / 5)
} else {
index = -parseInt((100 – rank) / 5)
}
color = “rgb(” + red + “, ” + green + “, ” + blue + “)”
scolor = “rgb(” + (red + index) + “, ” + (green + index) + “, ” + (blue + index) + “)”
return {
color: color,
scolor: scolor
}
}
//打乱颜色数组数组
function randomsort() {
return Math.random() > 0.5 ? -1 : 1
}
</script>
</body>
</html>
如果效果预览不正常可到演示链接查看
深圳前端开发工作难找 web前端开发工作报告 webgl前端开发工作
» 本文来自：前端开发者 » 《前端H5 canvas实现的找不同色块游戏》
» 本文链接地址：https://www.rokub.com/5846.html
» 您也可以订阅本站：https://www.rokub.com
评论前必须登录！
注册