HTML5 Canvas带模糊曳尾特效的流星动画

星星带有模糊的移动轨迹阴影。

canvas, star

《three.js如何实现贴图模糊效果 - 使用canvas》申请公开！

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HTML
CSS
JavaScript
Result

编译

JavaScript

var w = c.width = window.innerWidth,
    h = c.height = window.innerHeight,
    ctx = c.getContext('2d'),

size = [5, 20], //[min, max]
    shineDir = [.01, .05],
    angSpeed = [.02, .02],

stars = [],
    frame = (Math.random() * 360) | 0,
    pentaRadiant = Math.PI * 2 / 5;

function rand(ar) {
    return Math.random() * (ar[1] - ar[0]) + ar[0];
}

function Star() {
    this.size = rand(size);
    this.x = Math.random() * w;
    this.y = -this.size * 2;
    this.vy = this.size / 15;
    this.vx = Math.random() * 6 - 3;
    this.ay = this.size / 5000;
    this.shine = 0;
    this.shineDir = rand(shineDir);
    this.color = 'hsla(hue, 80%, brightness%, .15)'.replace('hue', frame % 360);
    this.rot = Math.random() * 2 * Math.PI;
    this.omega = rand(angSpeed);
    if (Math.random() < .5) this.omega *= -1;
}
Star.prototype.use = function() {
    this.x += this.vx;
    this.y += this.vy += this.ay;

var newShine = this.shine + this.shineDir;
    if (newShine < 0 || newShine > 1) this.shineDir *= -1
    else this.shine = newShine;
    this.rot += this.omega;

ctx.translate(this.x, this.y);
    ctx.rotate(this.rot);
    ctx.fillStyle = this.color.replace('brightness', (2.5 + this.shine / 2) * 1000);
    ctx.beginPath();
    ctx.moveTo(this.size, 0);

for (var i = 0; i < 5; ++i) {
        var rad = pentaRadiant * i,
            halfRad = rad + pentaRadiant / 8;
        ctx.lineTo(Math.cos(rad) * this.size, Math.sin(rad) * this.size);
        ctx.lineTo(Math.cos(halfRad) * this.size / 2, Math.sin(halfRad) * this.size / 2);
    }
    ctx.closePath();

ctx.fill();

ctx.rotate(-this.rot);
    ctx.translate(-this.x, -this.y);
}

function anim() {
    window.requestAnimationFrame(anim);

++frame;

ctx.globalCompositeOperation = 'destination-out';
    ctx.fillStyle = 'rgba(0, 0, 0, .1)';
    ctx.fillRect(0, 0, w, h);
    ctx.globalCompositeOperation = 'lighter';

if (Math.random() < .3) stars.push(new Star);

for (var s = 0; s < stars.length; ++s) {
        stars[s].use();

if (stars[s].x + stars[s].size < 0) {
            stars.splice(s, 6);
            --s;
        }
    }
}
anim();
object.style.zIndex = "-1"

//search bar coding
window.onload = function() {
    //Get submit button
    var submitbutton = document.getElementById("tfq");
    //Add listener to submit button
    if (submitbutton.addEventListener) {
        submitbutton.addEventListener("click", function() {
            if (submitbutton.value == 'Search') { //Customize this text string to whatever you want
                submitbutton.value = '';
            }
        });
    }
}

编译

CSS

#WD-Title {
    padding-left: 2.5%;
    padding-top: 2.5%;
    padding-bottom: 2.5%;
    margin-right: 77%;
    margin-bottom: 5%;
    background-color: #333333;
    color: white;
    font-family: monospace;
    text-transform: uppercase;
}
#topstuff1 {
    margin-top: -10%;
    margin-left: 25%;
    margin-right: 40%;
    background-color: #737373;
}
#topstuff2 {
    margin-top: -17%;
    margin-left: 30%;
    margin-right: 35%;
    background-color: #000099;
}
#topstuff3 {
    margin-top: -7%;
    margin-right: 15%;
    margin-left: 50%;
    background-color: #333333;
}
#topstuff4 {
    margin-top: -6%;
    margin-right: 65%;
    margin-left: 1%;
    background-color: #000066;
}
.topstuff1-2 {
    padding-top: 6.25%;
    padding-bottom: 5%;
    opacity: 0.7;
}
.topstuff3-4 {
    padding-top: 6%;
    padding-bottom: 5%;
    opacity: 0.7;
}
.all-top-stuff {
    position: relative;
    z-index: 1;
}
html,
body {
    background-color: #000;
}
ul {
    display: flex;
    justify-content: space-around;
    width: 100%;
    padding-left: 0;
}
li {
    list-style: none;
    font-size: 2%;
    font-family: monospace;
    font-weight: 300;
    text-transform: uppercase;
    letter-spacing: 1%;
}
a {
    color: black;
    text-decoration: none;
    position: relative;
}
a:hover:before {
    clip: rect(0, 190px, 190px, 0);
}
a:before {
    position: absolute;
    left: 0;
    top: 0;
    content: attr(data-content);
    display: inline-block;
    color: #6699ff;
    width: 100%;
    clip: rect(0, 0, 190px, 0);
    -webkit-transition: clip cubic-bezier(0.25, 0.46, 0.45, 0.94) 500ms;
    transition: clip cubic-bezier(0.25, 0.46, 0.45, 0.94) 500ms;
}
a:active {
    text-shadow: 4px 4px 5px black;
}
.buttons {
    margin-top: 10%;
    background-color: white;
    margin-left: 10%;
    margin-right: 10%;
    padding-top: 1%;
    padding-bottom: 1%;
}
.img {
    margin-bottom: 3.5%;
    background-color: black;
    border: 4px solid #1a001a;
    float: left;
    width: 13%;
    height: 200px;
}
.img:hover {
    border: 4px solid #777;
}
.img img {
    width: 100%;
    height: 100%;
}
.desc {
    padding: 6%;
    width: 87%;
    text-align: center;
    background-color: black;
    color: white;
    position: relative;
    z-index: 1;
    margin-top: 0px;
    border: 4px solid #1a001a;
}
.image-gallery {
    margin-left: 3%;
    margin-top: 3%;
}
canvas {
    position: absolute;
    top: 0;
    left: 0;
}
}
#desc1 {
    padding-bottom: 10%;
}
#desc2 {
    padding-bottom: 12%;
}
#desc3 {
    padding-bottom: 12%;
}
#desc4 {
    padding-bottom: 12%;
}
#desc5 {
    padding-bottom: 12%;
}
#desc6 {
    padding-bottom: 12%;
}
#desc7 {
    padding-bottom: 12%;
}
/* Search bar styling: */

#tfnewsearch {
    float: right;
    margin-top: -180px;
    padding: 20px;
}
.tftextinput {
    margin: 0;
    padding: 5px 20px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    border: 1px solid blue;
    border-right: 0px;
    border-top-left-radius: 5px 5px;
    border-bottom-left-radius: 5px 5px;
}
.tfbutton {
    margin: 0px;
    padding: 5px 20px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    outline: none;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    color: #ffffff;
    border: solid 1px blue;
    border-right: 1px;
    background: blue;
    background: -webkit-gradient(linear, left top, left bottom, from(purple), to(black));
    background: -moz-linear-gradient(top, yellow, green);
    border-top-right-radius: 5px 5px;
    border-bottom-right-radius: 5px 5px;
}
.tfbutton:hover {
    text-decoration: none;
    background: #00678e;
    background: -webkit-gradient(linear, left top, left bottom, from(#0095cc), to(#00678e));
    background: -moz-linear-gradient(top, #0095cc, #00678e);
}
/* Fixes submit button height problem in Firefox */

.tfbutton::-moz-focus-inner {
    border: 0;
}
.tfclear {
    clear: both;
}
/* more search bar coding */

#tfheader {
    background-color: #c3dfef;
}
#tfnewsearch {
    float: right;
    padding: 20px;
}
.tftextinput2 {
    margin: 0;
    padding: 5px 15px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    color: #666;
    border: 1px solid #0076a3;
    border-right: 0px;
    border-top-left-radius: 5px 5px;
    border-bottom-left-radius: 5px 5px;
}
.tfbutton2 {
    margin: 0;
    padding: 5px 7px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    font-weight: bold;
    outline: none;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    color: #ffffff;
    border: solid 1px #0076a3;
    border-right: 0px;
    background: #0095cd;
    background: -webkit-gradient(linear, left top, left bottom, from(#00adee), to(#0078a5));
    background: -moz-linear-gradient(top, #00adee, #0078a5);
    border-top-right-radius: 5px 5px;
    border-bottom-right-radius: 5px 5px;
}
.tfbutton2:hover {
    text-decoration: none;
    background: #007ead;
    background: -webkit-gradient(linear, left top, left bottom, from(#0095cc), to(#00678e));
    background: -moz-linear-gradient(top, #0095cc, #00678e);
}
/* Fixes submit button height problem in Firefox */

.tfbutton2::-moz-focus-inner {
    border: 0;
}
.tfclear {
    clear: both;
}

HTML

星星带有模糊的移动轨迹阴影。

canvas, star

编辑器支持Emmet

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星星带有模糊的移动轨迹阴影。

canvas, star

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