html5特效代码,HTML特效代码

提示：扫一扫查出行
【扫一扫了解最新限行尾号】
复制提示

HTML5动画特效怎么做

主要思想：

首先要准备一张有连续帧的图片，然后利用HTML5 Canvas的draw方法在不同的时间间隔绘制不同的帧，这样看起来就像动画在播放。

关键技术点：

JavaScript 函数setTimeout()有两个参数，第一个是参数可以传递一个JavaScript方法，

另外一个参数代表间隔时间，单位为毫秒数。代码示例：

setTimeout( update, 1000/30);

Canvas的API-drawImage()方法，需要指定全部9个参数：

ctx.drawImage(myImage, offw, offh, width,height, x2, y2, width, height);

其中offw, offh是指源图像的起始坐标点，width, height表示源图像的宽与高，x2,y2表

示源图像在目标Canvas上的起始坐标点。

!DOCTYPE html

html

head

meta http-equiv="X-UA-Compatible" content="chrome=IE8"

meta http-equiv="Content-type" content="text/html;charset=UTF-8"

titleCanvas Mouse Event Demo/title

link href="default.css" rel="stylesheet" /

script

var ctx = null; // global variable 2d context

var started = false;

var mText_canvas = null;

var x = 0, y =0;

var frame = 0; // 22 5*5 + 2

var imageReady = false;

var myImage = null;

var px = 300;

var py = 300;

var x2 = 300;

var y2 = 0;

window.onload = function() {

var canvas = document.getElementById("animation_canvas");

console.log(canvas.parentNode.clientWidth);

canvas.width = canvas.parentNode.clientWidth;

canvas.height = canvas.parentNode.clientHeight;

if (!canvas.getContext) {

console.log("Canvas not supported. Please install a HTML5 compatible browser.");

return;

}

// get 2D context of canvas and draw rectangel

ctx = canvas.getContext("2d");

ctx.fillStyle="black";

ctx.fillRect(0, 0, canvas.width, canvas.height);

myImage = document.createElement('img');

myImage.src = "../robin.png";

myImage.onload = loaded();

}

function loaded() {

imageReady = true;

setTimeout( update, 1000/30);

}

function redraw() {

ctx.clearRect(0, 0, 460, 460)

ctx.fillStyle="black";

ctx.fillRect(0, 0, 460, 460);

// find the index of frames in image

var height = myImage.naturalHeight/5;

var width = myImage.naturalWidth/5;

var row = Math.floor(frame / 5);

var col = frame - row * 5;

var offw = col * width;

var offh = row * height;

// first robin

px = px - 5;

py = py - 5;

if(px -50) {

px = 300;

}

if(py -50) {

py = 300;

}

//var rate = (frame+1) /22;

//var rw = Math.floor(rate * width);

//var rh = Math.floor(rate * height);

ctx.drawImage(myImage, offw, offh, width, height, px, py, width, height);

// second robin

x2 = x2 - 5;

y2 = y2 + 5;

if(x2 -50) {

x2 = 300;

y2 = 0;

}

ctx.drawImage(myImage, offw, offh, width, height, x2, y2, width, height);

}

function update() {

redraw();

frame++;

if (frame = 22) frame = 0;

setTimeout( update, 1000/30);

}

/script

/head

body

h1HTML Canvas Animations Demo - By Gloomy Fish/h1

prePlay Animations/pre

div id="my_painter"

canvas id="animation_canvas"/canvas

/div

/body

/html

相关问答

Q1: HTML5翻页效果文字特效怎么实现

首先是HTML代码，非常简单，列出我们需要渲染的文字：

div class="foo"

span class="letter" data-letter="A"A/span

span class="letter" data-letter="B"B/span

span class="letter" data-letter="C"C/span

span class="letter" data-letter="D"D/span

span class="letter" data-letter="E"E/span

span class="letter" data-letter="F"F/span

span class="letter" data-letter="G"G/span

span class="letter" data-letter="H"H/span

span class="letter" data-letter="I"I/span

span class="letter" data-letter="L"L/span

span class="letter" data-letter="M"M/span

span class="letter" data-letter="N"N/span

span class="letter" data-letter="O"O/span

span class="letter" data-letter="P"P/span

span class="letter" data-letter="Q"Q/span

span class="letter" data-letter="R"R/span

span class="letter" data-letter="S"S/span

span class="letter" data-letter="T"T/span

span class="letter" data-letter="U"U/span

span class="letter" data-letter="V"V/span

span class="letter" data-letter="Z"Z/span

/div

CSS3

.letter{

display: inline-block;

font-weight: 900;

font-size: 8em;

margin: 0.2em;

position: relative;

color: #00B4F1;

transform-style: preserve-3d;

perspective: 400;

z-index: 1;

}

这样我们就让这些字母安安静静的排列起来，并有了自己的背景颜色，等待强大的CSS3来渲染。

接下来我们要让文字在鼠标滑过的时候产生翻转倾斜的动画。

.letter:before, .letter:after{

position:absolute;

content: attr(data-letter);

transform-origin: top left;

top:0;

left:0;

}

.letter, .letter:before, .letter:after{

transition: all 0.3s ease-in-out;

}

.letter:before{

color: #fff;

text-shadow:

-1px 0px 1px rgba(255,255,255,.8),

1px 0px 1px rgba(0,0,0,.8);

z-index: 3;

transform:

rotateX(0deg)

rotateY(-15deg)

rotateZ(0deg);

}

.letter:after{

color: rgba(0,0,0,.11);

z-index:2;

transform:

scale(1.08,1)

rotateX(0deg)

rotateY(0deg)

rotateZ(0deg)

skew(0deg,1deg);

}

.letter:hover:before{

color: #fafafa;

transform:

rotateX(0deg)

rotateY(-40deg)

rotateZ(0deg);

}

.letter:hover:after{

transform:

scale(1.08,1)

rotateX(0deg)

rotateY(40deg)

rotateZ(0deg)

skew(0deg,22deg);

}

Q2: 如何制作html5的动画效果？

主要思想：\x0d\x0a首先要准备一张有连续帧的图片，然后利用HTML5Canvas的draw方法在不同的时间间隔绘制不同的帧，这样看起来就像动画在播放。\x0d\x0a关键技术点：\x0d\x0aJavaScript函数setTimeout()有两个参数，第一个是参数可以传递一个JavaScript方法，\x0d\x0a另外一个参数代表间隔时间，单位为毫秒数。代码示例：\x0d\x0asetTimeout(update,1000/30);\x0d\x0aCanvas的API-drawImage()方法，需要指定全部9个参数：\x0d\x0actx.drawImage(myImage,offw,offh,width,height,x2,y2,width,height);\x0d\x0a其中offw,offh是指源图像的起始坐标点，width,height表示源图像的宽与高，x2,y2表\x0d\x0a示源图像在目标Canvas上的起始坐标点。\x0d\x0a\x0d\x0a\x0d\x0a\x0d\x0a\x0d\x0a\x0d\x0aCanvasMouseEventDemo\x0d\x0a\x0d\x0a\x0d\x0avarctx=null;globalvariable2dcontext\x0d\x0avarstarted=false;\x0d\x0avarmText_canvas=null;\x0d\x0avarx=0,y=0;\x0d\x0avarframe=0;225*5+2\x0d\x0avarimageReady=false;\x0d\x0avarmyImage=null;\x0d\x0avarpx=300;\x0d\x0avarpy=300;\x0d\x0avarx2=300;\x0d\x0avary2=0;\x0d\x0awindow.onload=function(){\x0d\x0avarcanvas=document.getElementById("animation_canvas");\x0d\x0aconsole.log(canvas.parentNode.clientWidth);\x0d\x0acanvas.width=canvas.parentNode.clientWidth;\x0d\x0acanvas.height=canvas.parentNode.clientHeight;\x0d\x0aif(!canvas.getContext){\x0d\x0aconsole.log("Canvasnotsupported.PleaseinstallaHTML5compatiblebrowser.");\x0d\x0areturn;\x0d\x0a}\x0d\x0aget2Dcontextofcanvasanddrawrectangel\x0d\x0actx=canvas.getContext("2d");\x0d\x0actx.fillStyle="black";\x0d\x0actx.fillRect(0,0,canvas.width,canvas.height);\x0d\x0amyImage=document.createElement('img');\x0d\x0amyImage.src="..robin.png";\x0d\x0amyImage.onload=loaded();\x0d\x0a}\x0d\x0afunctionloaded(){\x0d\x0aimageReady=true;\x0d\x0asetTimeout(update,100030);\x0d\x0a}\x0d\x0afunctionredraw(){\x0d\x0actx.clearRect(0,0,460,460)\x0d\x0actx.fillStyle="black";\x0d\x0actx.fillRect(0,0,460,460);\x0d\x0afindtheindexofframesinimage\x0d\x0avarheight=myImage.naturalHeight5;\x0d\x0avarwidth=myImage.naturalWidth5;\x0d\x0avarrow=Math.floor(frame5);\x0d\x0avarcol=frame-row*5;\x0d\x0avaroffw=col*width;\x0d\x0avaroffh=row*height;\x0d\x0afirstrobin\x0d\x0apx=px-5;\x0d\x0apy=py-5;\x0d\x0aif(px

Q3: html5上下滑动“翻页”实现，是真正的翻页

HTML5手机上下滑动翻页特效是一款手机移动端触屏滑动效果实现完整代码如下：

1、html5页面代码

!DOCTYPE html

htmlheadmeta http-equiv="Content-Type" content="text/html; charset=UTF-8"

titleHTML5手机页面触屏滑动上下翻页特效/title

meta charset="utf-8"

meta name="apple-touch-fullscreen" content="YES"

meta name="format-detection" content="telephone=no"

meta name="apple-mobile-web-app-capable" content="yes"

meta name="apple-mobile-web-app-status-bar-style" content="black"

meta http-equiv="Expires" content="-1"

meta http-equiv="pragram" content="no-cache"

link rel="stylesheet" type="text/css" href="./hamer_files/main.css"

link rel="stylesheet" type="text/css" href="./hamer_files/endpic.css"

script type="text/javascript" src="./hamer_files/offline.js"/script

meta name="viewport" content="width=640, user-scalable=no, target-densitydpi=device-dpi"

/head

body class="s-bg-ddd pc no-3d perspective yes-3d" style="-webkit-user-select: none;"

section class="u-alert"

img style="display:none;" src="./hamer_files/loading_large.gif"

div class="alert-loading z-move"

div class="cycleWrap" span class="cycle cycle-1"/span

span class="cycle cycle-2"/spanspan class="cycle cycle-3"/spanspan class="cycle cycle-4"/span

/div

div class="lineWrap" span class="line line-1"/spanspan class="line line-2"/spanspan class="line line-3"/span

/div

/section

section class="u-arrow"

p class="css_sprite01"/p

/section

section class="p-ct transformNode-2d transformNode-3d" style="height: 918px;"

div class="translate-back" style="height: 918px;"

div class="m-page m-fengye" data-page-type="info_pic3" data-statics="info_pic3" style="height: 918px;"

div class="page-con lazy-finish" data-position="50% 50%" data-size="cover" style="height: 920px; background-image: url(hamer_files/1.jpg); background-size: cover; background-position: 50% 50%;"/div

/div