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本文小編為大家詳細介紹“如何使用canvas實現人體時鐘效果”，內容詳細，步驟清晰，細節處理妥當，希望這篇“如何使用canvas實現人體時鐘效果”文章能幫助大家解決疑惑，下面跟著小編的思路慢慢深入，一起來學習新知識吧。
核心的API是PIXI.AnimatedSprite。
代碼也是很短，就直接放到下面了
<!doctype html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>HoneHoneClock</title>
<style>
* {
padding: 0;
margin: 0;
}
html, body {
width: 100%;
height: 100%;
}
body {
background-color: lightcyan;
}
canvas {
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 100%;
z-index: 1;
}
</style>
</head>
<body>
<canvas class="canvas"></canvas>
<script src="pixi_5.3.4.min.js"></script>
<script src="Stats.min.js"></script>
<script>
(async function () {
const stats = new Stats()
document.body.appendChild(stats.domElement)
let pageWidth = 0
let pageHeight = 0
let clockHour1, clockHour2
let clockMin1, clockMin2
let clockSec1, clockSec2
const $canvas = document.querySelector('canvas')
const renderer = new PIXI.Renderer({
view: $canvas,
width: pageWidth,
height: pageHeight,
transparent: true,
autoDensity: true,
antialias: true
})
// 人體時鐘
class Clock extends PIXI.Container {
constructor (name) {
super()
const textures = loader.resources[honeHoneClockJson].textures
let frames = []
let aniData = []
if (this.frames) {
frames = this.frames
aniData = this.aniData
}
else {
aniData = [
{
prefix: '0',
count: 6,
frameFrom: -1,
frameTo: -1,
},
{
prefix: '1',
count: 9,
frameFrom: -1,
frameTo: -1,
},
{
prefix: '2',
count: 7,
frameFrom: -1,
frameTo: -1,
},
{
prefix: '3',
count: 6,
frameFrom: -1,
frameTo: -1,
},
{
prefix: '4',
count: 9,
frameFrom: -1,
frameTo: -1,
},
{
prefix: '5',
count: 14,
frameFrom: -1,
frameTo: -1,
},
{
prefix: '6',
count: 7,
frameFrom: -1,
frameTo: -1,
},
{
prefix: '7',
count: 10,
frameFrom: -1,
frameTo: -1,
},
{
prefix: '8',
count: 7,
frameFrom: -1,
frameTo: -1,
},
{
prefix: '9',
count: 9,
frameFrom: -1,
frameTo: -1,
},
]
let k = 0
for (let i = 0; i < aniData.length; i++) {
const data = aniData[i]
data.frameFrom = k
for (let j = 1; j <= data.count; j++) {
k++
frames.push(textures[`${data.prefix}(${j}).png`])
}
data.frameTo = k - 1
}
this.frames = frames
this.aniData = aniData
}
const ani = new PIXI.AnimatedSprite(frames)
ani.anchor.set(0.5, 1)
ani.animationSpeed = 0.4
this.stopAt = -1
ani.onFrameChange = () => {
if (ani.currentFrame === this.stopAt) {
ani.stop()
}
}
this.addChild(ani)
this.name = name
this.ani = ani
this.num = -1
}
set number (number) {
if (this.num !== number) {
this.num = number
this.stopAt = this.aniData[number].frameTo
this.ani.gotoAndPlay(this.aniData[number].frameFrom)
}
}
}
const stage = new PIXI.Container()
stage.name = 'stage'
let clockWrap
const ticker = new PIXI.Ticker()
let now = new Date()
let lastTime = now.getTime()
const loop = function () {
stats.begin()
now = new Date()
if (now.getTime() - lastTime >= 1000) {
let hours = now.getHours()
if (hours > 9) {
clockHour1.number = Math.floor(hours / 10)
clockHour2.number = hours % 10
}
else {
clockHour1.number = 0
clockHour2.number = hours
}
let minutes = now.getMinutes()
if (minutes > 9) {
clockMin1.number = Math.floor(minutes / 10)
clockMin2.number = minutes % 10
}
else {
clockMin1.number = 0
clockMin2.number = minutes
}
let seconds = now.getSeconds()
if (seconds > 9) {
clockSec1.number = Math.floor(seconds / 10)
clockSec2.number = seconds % 10
}
else {
clockSec1.number = 0
clockSec2.number = seconds
}
lastTime = now.getTime()
}
renderer.render(stage)
stats.end()
}
ticker.add(loop)
const honeHoneClockJson = 'HoneHoneClock.json'
const loader = new PIXI.Loader()
loader.add([honeHoneClockJson])
loader.onComplete.add(async (res) => {
clockWrap = new PIXI.Container()
clockWrap.position.set((pageWidth - 630) * 0.5, (pageHeight + 150) * 0.5)
clockHour1 = new Clock('hour')
clockHour2 = new Clock('hour')
clockMin1 = new Clock('min')
clockMin2 = new Clock('min')
clockSec1 = new Clock('sec')
clockSec2 = new Clock('sec')
clockHour1.position.set(0, 0)
clockHour2.position.set(100, 0)
clockMin1.position.set(250, 0)
clockMin2.position.set(350, 0)
clockSec1.position.set(500, 0)
clockSec2.position.set(600, 0)
clockWrap.addChild(clockHour1)
clockWrap.addChild(clockHour2)
clockWrap.addChild(clockMin1)
clockWrap.addChild(clockMin2)
clockWrap.addChild(clockSec1)
clockWrap.addChild(clockSec2)
stage.addChild(clockWrap)
// 開始動畫循環
ticker.start()
})
loader.load()
const onResize = (e) => {
pageWidth = document.body.clientWidth
pageHeight = document.body.clientHeight
if (clockWrap) {
clockWrap.position.set((pageWidth - 630) * 0.5, (pageHeight + 150) * 0.5)
}
renderer.resize(pageWidth, pageHeight)
}
onResize()
window.onresize = onResize
})()
</script>
</body>
</html>讀到這里，這篇“如何使用canvas實現人體時鐘效果”文章已經介紹完畢，想要掌握這篇文章的知識點還需要大家自己動手實踐使用過才能領會，如果想了解更多相關內容的文章，歡迎關注億速云行業資訊頻道。
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