以下是 7款HTML5 Canvas全屏背景动画特效 的示例演示效果:
部分效果截图1:
部分效果截图2:
部分效果截图3:
部分效果截图4:
部分效果截图5:
部分效果截图6:
部分效果截图7:
HTML代码(index.html):
<!DOCTYPE html>
<html >
<head>
<meta charset="gb2312">
<meta name="google" value="notranslate">
<meta name="robots" content="noindex">
<title>7��HTML5 Canvasȫ������������Ч</title>
<style>
canvas { position: absolute; top: 0; left: 0; }
/* Demo Buttons Style */
.codrops-demos {
font-size: 0.8em;
text-align:center;
position:absolute;
z-index:99;
width:96%;
}
.codrops-demos a {
display: inline-block;
margin: 0.35em 0.1em;
padding: 0.5em 1.2em;
outline: none;
text-decoration: none;
text-transform: uppercase;
letter-spacing: 1px;
font-weight: 700;
border-radius: 2px;
font-size: 110%;
border: 2px solid transparent;
color:#fff;
}
.codrops-demos a:hover,
.codrops-demos a.current-demo {
border-color: #383a3c;
}
</style>
</head>
<body>
<nav class="codrops-demos">
<a class="current-demo" href="index.html">Demo 1</a>
<a href="index2.html">Demo 2</a>
<a href="index3.html">Demo 3</a>
<a href="index4.html">Demo 4</a>
<a href="index5.html">Demo 5</a>
<a href="index6.html">Demo 6</a>
<a href="index7.html">Demo 7</a>
</nav>
<canvas id="c"></canvas>
<script type="text/javascript">
var w = c.width = window.innerWidth,
h = c.height = window.innerHeight,
ctx = c.getContext('2d'),
opts = {
len: 20,
count: 50,
baseTime: 10,
addedTime: 10,
dieChance: .05,
spawnChance: 1,
sparkChance: .1,
sparkDist: 10,
sparkSize: 2,
color: 'hsl(hue,100%,light%)',
baseLight: 50,
addedLight: 10,
shadowToTimePropMult: 6,
baseLightInputMultiplier: .01,
addedLightInputMultiplier: .02,
cx: w / 2,
cy: h / 2,
repaintAlpha: .04,
hueChange: .1
},
tick = 0,
lines = [],
dieX = w / 2 / opts.len,
dieY = h / 2 / opts.len,
baseRad = Math.PI * 2 / 6;
ctx.fillStyle = 'black';
ctx.fillRect(0, 0, w, h);
function loop() {
window.requestAnimationFrame(loop); ++tick;
ctx.globalCompositeOperation = 'source-over';
ctx.shadowBlur = 0;
ctx.fillStyle = 'rgba(0,0,0,alp)'.replace('alp', opts.repaintAlpha);
ctx.fillRect(0, 0, w, h);
ctx.globalCompositeOperation = 'lighter';
if (lines.length < opts.count && Math.random() < opts.spawnChance) lines.push(new Line);
lines.map(function(line) {
line.step()
})
}
function Line() {
this.reset()
}
Line.prototype.reset = function() {
this.x = 0;
this.y = 0;
this.addedX = 0;
this.addedY = 0;
this.rad = 0;
this.lightInputMultiplier = opts.baseLightInputMultiplier + opts.addedLightInputMultiplier * Math.random();
this.color = opts.color.replace('hue', tick * opts.hueChange);
this.cumulativeTime = 0;
this.beginPhase()
}
Line.prototype.beginPhase = function() {
this.x += this.addedX;
this.y += this.addedY;
this.time = 0;
this.targetTime = (opts.baseTime + opts.addedTime * Math.random()) | 0;
this.rad += baseRad * (Math.random() < .5 ? 1 : -1);
this.addedX = Math.cos(this.rad);
this.addedY = Math.sin(this.rad);
if (Math.random() < opts.dieChance || this.x > dieX || this.x < -dieX || this.y > dieY || this.y < -dieY) this.reset()
}
Line.prototype.step = function() {++this.time; ++this.cumulativeTime;
if (this.time >= this.targetTime) this.beginPhase();
var prop = this.time / this.targetTime,
wave = Math.sin(prop * Math.PI / 2),
x = this.addedX * wave,
y = this.addedY * wave;
ctx.shadowBlur = prop * opts.shadowToTimePropMult;
ctx.fillStyle = ctx.shadowColor = this.color.replace('light', opts.baseLight + opts.addedLight * Math.sin(this.cumulativeTime * this.lightInputMultiplier));
ctx.fillRect(opts.cx + (this.x + x) * opts.len, opts.cy + (this.y + y) * opts.len, 2, 2);
if (Math.random() < opts.sparkChance) ctx.fillRect(opts.cx + (this.x + x) * opts.len + Math.random() * opts.sparkDist * (Math.random() < .5 ? 1 : -1) - opts.sparkSize / 2, opts.cy + (this.y + y) * opts.len + Math.random() * opts.sparkDist * (Math.random() < .5 ? 1 : -1) - opts.sparkSize / 2, opts.sparkSize, opts.sparkSize)
}
loop();
window.addEventListener('resize',
function() {
w = c.width = window.innerWidth;
h = c.height = window.innerHeight;
ctx.fillStyle = 'black';
ctx.fillRect(0, 0, w, h);
opts.cx = w / 2;
opts.cy = h / 2;
dieX = w / 2 / opts.len;
dieY = h / 2 / opts.len
});
</script>
</body>
</html>HTML代码(index2.html):
<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<meta name="google" value="notranslate">
<title>code2</title>
<style>
HTML, BODY { height: 100%; overflow: hidden; }
BODY { background: #0a0a0a; background-image: -webkit-linear-gradient(#0f0f0f 1px, transparent 1px), -webkit-linear-gradient(left, #0f0f0f 1px, transparent 1px); background-image: linear-gradient(#0f0f0f 1px, transparent 1px), linear-gradient(to right, #0f0f0f 1px, transparent 1px); background-size: 3.33333vmin 3.33333vmin; }
.range { /* display: none; */
position: absolute; zind: 2px; }
.wrapper { position: absolute; top: 0; right: 0; bottom: 0; left: 0; margin: auto; width: 10vmin; height: 10vmin; font-size: 10vmin; -webkit-transform: rotateX(-45deg); transform: rotateX(-45deg); -webkit-transform-style: preserve-3d; transform-style: preserve-3d; }
.flower { width: 10vmin; height: 10vmin; -webkit-animation: rotate-flower 10s linear infinite; animation: rotate-flower 10s linear infinite; -webkit-transform-style: preserve-3d; transform-style: preserve-3d; }
.flower:before { content: ''; display: block; position: absolute; width: 95%; height: 95%; top: 0; right: 0; bottom: 0; left: 0; margin: auto; background: #226600; border-radius: 50%; -webkit-transform: rotateX(90deg); transform: rotateX(90deg); -webkit-animation: rotate-hue 5s infinite; animation: rotate-hue 5s infinite; }
.petal { position: absolute; z-index: 20; bottom: 80%; left: -10vmin; -webkit-transform-style: preserve-3d; transform-style: preserve-3d; -webkit-transform-origin: bottom; transform-origin: bottom; }
.box { width: 30vmin; -webkit-transform-style: preserve-3d; transform-style: preserve-3d; -webkit-transform-origin: bottom; transform-origin: bottom; -webkit-animation: rotate-box 12s infinite; animation: rotate-box 12s infinite; }
.shape { width: 0.5em; height: 0.5em; margin: auto; background: currentColor; box-shadow: 0.5em 0 0 0, 1em 0 0 0, -1em 0 0 0, -0.5em 0 0 0; border-radius: 50%; -webkit-animation: rotate-hue 5s infinite; animation: rotate-hue 5s infinite; }
@-webkit-keyframes rotate-box {
0% {
-webkit-transform: rotateX(3.5deg);
transform: rotateX(3.5deg);
}
15% {
-webkit-transform: rotateX(3.5deg);
transform: rotateX(3.5deg);
}
50% {
-webkit-transform: rotateX(-7deg);
transform: rotateX(-7deg);
}
80% {
-webkit-transform: rotateX(-7deg);
transform: rotateX(-7deg);
}
100% {
-webkit-transform: rotateX(3.5deg);
transform: rotateX(3.5deg);
}
}
@keyframes rotate-box {
0% {
-webkit-transform: rotateX(3.5deg);
transform: rotateX(3.5deg);
}
15% {
-webkit-transform: rotateX(3.5deg);
transform: rotateX(3.5deg);
}
50% {
-webkit-transform: rotateX(-7deg);
transform: rotateX(-7deg);
}
80% {
-webkit-transform: rotateX(-7deg);
transform: rotateX(-7deg);
}
100% {
-webkit-transform: rotateX(3.5deg);
transform: rotateX(3.5deg);
}
}
@-webkit-keyframes rotate-flower {
100% {
-webkit-transform: rotateY(360deg);
transform: rotateY(360deg);
}
}
@keyframes rotate-flower {
100% {
-webkit-transform: rotateY(360deg);
transform: rotateY(360deg);
}
}
@-webkit-keyframes rotate-hue {
100% {
-webkit-filter: hue-rotate(360deg);
filter: hue-rotate(360deg);
}
}
@keyframes rotate-hue {
100% {
-webkit-filter: hue-rotate(360deg);
filter: hue-rotate(360deg);
}
}
/* Demo Buttons Style */
.codrops-demos {
font-size: 0.8em;
text-align:center;
position:absolute;
z-index:99;
width:96%;
}
.codrops-demos a {
display: inline-block;
margin: 0.35em 0.1em;
padding: 0.5em 1.2em;
outline: none;
text-decoration: none;
text-transform: uppercase;
letter-spacing: 1px;
font-weight: 700;
border-radius: 2px;
font-size: 110%;
border: 2px solid transparent;
color:#fff;
}
.codrops-demos a:hover,
.codrops-demos a.current-demo {
border-color: #383a3c;
}
</style>
</head>
<body>
<nav class="codrops-demos">
<a href="index.html">Demo 1</a>
<a class="current-demo" href="index2.html">Demo 2</a>
<a href="index3.html">Demo 3</a>
<a href="index4.html">Demo 4</a>
<a href="index5.html">Demo 5</a>
<a href="index6.html">Demo 6</a>
<a href="index7.html">Demo 7</a>
</nav>
<div class="wrapper">
<div class="flower"></div>
</div>
<script>
console.clear();
var doc = document;
var flower = doc.querySelector('.flower');
var range = doc.querySelector('.range');
var petalPartMarkup = '<div class="box"> \
<div class="shape"></div> \
</div>';
var maxParts = 20;
var maxPetalsDef = 6;
var maxPetals = maxPetalsDef;
var partsFontStepDef = 25 / maxParts;
var partsFontStep = partsFontStepDef;
var huetStep = 150 / maxParts;
createFlower();
function createFlower() {
var angle = 360 / maxPetals;
for (var i = 0; i < maxPetals; i++) {
var petal = createPetal();
var currAngle = angle * i + 'deg';
var transform = 'transform: rotateY(' + currAngle + ') rotateX(-30deg) translateZ(9vmin)';
petal.setAttribute('style', transform);
flower.appendChild(petal);
}
}
function createPetal() {
var box = createBox(null, 0);
var petal = doc.createElement('div');
petal.classList.add('petal');
for (var i = 1; i <= maxParts; i++) {
newBox = createBox(box, i);
box = newBox;
}
petal.appendChild(box);
return petal;
}
function createBox(box, pos) {
var fontSize = partsFontStep * (maxParts - pos) + 'vmin';
var half = maxParts / 2;
var bright = '50';
if (pos < half + 1) {
fontSize = partsFontStep * pos + 'vmin';
} else {
bright = 10 + 40 / half * (maxParts - pos);
}
var color = 'hsl(' + huetStep * pos + ', 100%, ' + bright + '%)';
// 1. Add shape
var newShape = doc.createElement('div');
newShape.classList.add('shape');
// 2. Create wrapper .box
var newBox = doc.createElement('div');
newBox.classList.add('box');
var boxStyle = ['color: ' + color, 'font-size: ' + fontSize].join(';');
newBox.setAttribute('style', boxStyle);
// 3. Add old box to new box
if (box) {
newBox.appendChild(box);
}
// 4. Add shape to new box
newBox.appendChild(newShape);
return newBox;
}
function out(content) {
console.log(content);
}
</script>
</body>
</html>
HTML代码(index3.html):
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>code3</title>
<style>
body {
background: #000;
overflow: hidden;
}
canvas {
display: block;
}
/* Demo Buttons Style */
.codrops-demos {
font-size: 0.8em;
text-align:center;
position:absolute;
z-index:99;
width:96%;
}
.codrops-demos a {
display: inline-block;
margin: 0.35em 0.1em;
padding: 0.5em 1.2em;
outline: none;
text-decoration: none;
text-transform: uppercase;
letter-spacing: 1px;
font-weight: 700;
border-radius: 2px;
font-size: 110%;
border: 2px solid transparent;
color:#fff;
}
.codrops-demos a:hover,
.codrops-demos a.current-demo {
border-color: #383a3c;
}
</style>
</head>
<body>
<nav class="codrops-demos">
<a href="index.html">Demo 1</a>
<a href="index2.html">Demo 2</a>
<a class="current-demo" href="index3.html">Demo 3</a>
<a href="index4.html">Demo 4</a>
<a href="index5.html">Demo 5</a>
<a href="index6.html">Demo 6</a>
<a href="index7.html">Demo 7</a>
</nav>
<canvas id="canvas"></canvas>
<script>
var canvas,
ctx,
width,
height,
size,
lines,
tick;
function line() {
this.path = [];
this.speed = rand(10, 20);
this.count = randInt(10, 30);
this.x = width / 2, +1;
this.y = height / 2 + 1;
this.target = {
x: width / 2,
y: height / 2
};
this.dist = 0;
this.angle = 0;
this.hue = tick / 5;
this.life = 1;
this.updateAngle();
this.updateDist();
}
line.prototype.step = function(i) {
this.x += Math.cos(this.angle) * this.speed;
this.y += Math.sin(this.angle) * this.speed;
this.updateDist();
if (this.dist < this.speed) {
this.x = this.target.x;
this.y = this.target.y;
this.changeTarget();
}
this.path.push({
x: this.x,
y: this.y
});
if (this.path.length > this.count) {
this.path.shift();
}
this.life -= 0.001;
if (this.life <= 0) {
this.path = null;
lines.splice(i, 1);
}
};
line.prototype.updateDist = function() {
var dx = this.target.x - this.x,
dy = this.target.y - this.y;
this.dist = Math.sqrt(dx * dx + dy * dy);
}
line.prototype.updateAngle = function() {
var dx = this.target.x - this.x,
dy = this.target.y - this.y;
this.angle = Math.atan2(dy, dx);
}
line.prototype.changeTarget = function() {
var randStart = randInt(0, 3);
switch (randStart) {
case 0: // up
this.target.y = this.y - size;
break;
case 1: // right
this.target.x = this.x + size;
break;
case 2: // down
this.target.y = this.y + size;
break;
case 3: // left
this.target.x = this.x - size;
}
this.updateAngle();
};
line.prototype.draw = function(i) {
ctx.beginPath();
var rando = rand(0, 10);
for (var j = 0, length = this.path.length; j < length; j++) {
ctx[(j === 0) ? 'moveTo' : 'lineTo'](this.path[j].x + rand(-rando, rando), this.path[j].y + rand(-rando, rando));
}
ctx.strokeStyle = 'hsla(' + rand(this.hue, this.hue + 30) + ', 80%, 55%, ' + (this.life / 3) + ')';
ctx.lineWidth = rand(0.1, 2);
ctx.stroke();
};
function rand(min, max) {
return Math.random() * (max - min) + min;
}
function randInt(min, max) {
return Math.floor(min + Math.random() * (max - min + 1));
};
function init() {
canvas = document.getElementById('canvas');
ctx = canvas.getContext('2d');
size = 30;
lines = [];
reset();
loop();
}
function reset() {
width = Math.ceil(window.innerWidth / 2) * 2;
height = Math.ceil(window.innerHeight / 2) * 2;
tick = 0;
lines.length = 0;
canvas.width = width;
canvas.height = height;
}
function create() {
if (tick % 10 === 0) {
lines.push(new line());
}
}
function step() {
var i = lines.length;
while (i--) {
lines[i].step(i);
}
}
function clear() {
ctx.globalCompositeOperation = 'destination-out';
ctx.fillStyle = 'hsla(0, 0%, 0%, 0.1';
ctx.fillRect(0, 0, width, height);
ctx.globalCompositeOperation = 'lighter';
}
function draw() {
ctx.save();
ctx.translate(width / 2, height / 2);
ctx.rotate(tick * 0.001);
var scale = 0.8 + Math.cos(tick * 0.02) * 0.2;
ctx.scale(scale, scale);
ctx.translate(-width / 2, -height / 2);
var i = lines.length;
while (i--) {
lines[i].draw(i);
}
ctx.restore();
}
function loop() {
requestAnimationFrame(loop);
create();
step();
clear();
draw();
tick++;
}
function onresize() {
reset();
}
window.addEventListener('resize', onresize);
init();
</script>
</body>
</html>
HTML代码(index4.html):
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>code7</title>
<style>
html {
height: 100%;
background-image: -webkit-radial-gradient(ellipse farthest-corner at center top, #000d4d 0%, #000105 100%);
background-image: radial-gradient(ellipse farthest-corner at center top, #000d4d 0%, #000105 100%);
cursor: move;
}
body {
width: 100%;
margin: 0;
overflow: hidden;
}
/* Demo Buttons Style */
.codrops-demos {
font-size: 0.8em;
text-align:center;
position:absolute;
z-index:99;
width:96%;
}
.codrops-demos a {
display: inline-block;
margin: 0.35em 0.1em;
padding: 0.5em 1.2em;
outline: none;
text-decoration: none;
text-transform: uppercase;
letter-spacing: 1px;
font-weight: 700;
border-radius: 2px;
font-size: 110%;
border: 2px solid transparent;
color:#fff;
}
.codrops-demos a:hover,
.codrops-demos a.current-demo {
border-color: #383a3c;
}
</style>
</head>
<body>
<nav class="codrops-demos">
<a href="index.html">Demo 1</a>
<a href="index2.html">Demo 2</a>
<a href="index3.html">Demo 3</a>
<a class="current-demo" href="index4.html">Demo 4</a>
<a href="index5.html">Demo 5</a>
<a href="index6.html">Demo 6</a>
<a href="index7.html">Demo 7</a>
</nav>
<canvas id="canv"></canvas>
<script>
var num = 200;
var w = window.innerWidth;
var h = window.innerHeight;
var max = 100;
var _x = 0;
var _y = 0;
var _z = 150;
var dtr = function(d) {
return d * Math.PI / 180;
};
var rnd = function() {
return Math.sin(Math.floor(Math.random() * 360) * Math.PI / 180);
};
var dist = function(p1, p2, p3) {
return Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2) + Math.pow(p2.z - p1.z, 2));
};
var cam = {
obj: {
x: _x,
y: _y,
z: _z
},
dest: {
x: 0,
y: 0,
z: 1
},
dist: {
x: 0,
y: 0,
z: 200
},
ang: {
cplane: 0,
splane: 0,
ctheta: 0,
stheta: 0
},
zoom: 1,
disp: {
x: w / 2,
y: h / 2,
z: 0
},
upd: function() {
cam.dist.x = cam.dest.x - cam.obj.x;
cam.dist.y = cam.dest.y - cam.obj.y;
cam.dist.z = cam.dest.z - cam.obj.z;
cam.ang.cplane = -cam.dist.z / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.z * cam.dist.z);
cam.ang.splane = cam.dist.x / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.z * cam.dist.z);
cam.ang.ctheta = Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.z * cam.dist.z) / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.y * cam.dist.y + cam.dist.z * cam.dist.z);
cam.ang.stheta = -cam.dist.y / Math.sqrt(cam.dist.x * cam.dist.x + cam.dist.y * cam.dist.y + cam.dist.z * cam.dist.z);
}
};
var trans = {
parts: {
sz: function(p, sz) {
return {
x: p.x * sz.x,
y: p.y * sz.y,
z: p.z * sz.z
};
},
rot: {
x: function(p, rot) {
return {
x: p.x,
y: p.y * Math.cos(dtr(rot.x)) - p.z * Math.sin(dtr(rot.x)),
z: p.y * Math.sin(dtr(rot.x)) + p.z * Math.cos(dtr(rot.x))
};
},
y: function(p, rot) {
return {
x: p.x * Math.cos(dtr(rot.y)) + p.z * Math.sin(dtr(rot.y)),
y: p.y,
z: -p.x * Math.sin(dtr(rot.y)) + p.z * Math.cos(dtr(rot.y))
};
},
z: function(p, rot) {
return {
x: p.x * Math.cos(dtr(rot.z)) - p.y * Math.sin(dtr(rot.z)),
y: p.x * Math.sin(dtr(rot.z)) + p.y * Math.cos(dtr(rot.z)),
z: p.z
};
}
},
pos: function(p, pos) {
return {
x: p.x + pos.x,
y: p.y + pos.y,
z: p.z + pos.z
};
}
},
pov: {
plane: function(p) {
return {
x: p.x * cam.ang.cplane + p.z * cam.ang.splane,
y: p.y,
z: p.x * -cam.ang.splane + p.z * cam.ang.cplane
};
},
theta: function(p) {
return {
x: p.x,
y: p.y * cam.ang.ctheta - p.z * cam.ang.stheta,
z: p.y * cam.ang.stheta + p.z * cam.ang.ctheta
};
},
set: function(p) {
return {
x: p.x - cam.obj.x,
y: p.y - cam.obj.y,
z: p.z - cam.obj.z
};
}
},
persp: function(p) {
return {
x: p.x * cam.dist.z / p.z * cam.zoom,
y: p.y * cam.dist.z / p.z * cam.zoom,
z: p.z * cam.zoom,
p: cam.dist.z / p.z
};
},
disp: function(p, disp) {
return {
x: p.x + disp.x,
y: -p.y + disp.y,
z: p.z + disp.z,
p: p.p
};
},
steps: function(_obj_, sz, rot, pos, disp) {
var _args = trans.parts.sz(_obj_, sz);
_args = trans.parts.rot.x(_args, rot);
_args = trans.parts.rot.y(_args, rot);
_args = trans.parts.rot.z(_args, rot);
_args = trans.parts.pos(_args, pos);
_args = trans.pov.plane(_args);
_args = trans.pov.theta(_args);
_args = trans.pov.set(_args);
_args = trans.persp(_args);
_args = trans.disp(_args, disp);
return _args;
}
};
(function() {
"use strict";
var threeD = function(param) {
this.transIn = {};
this.transOut = {};
this.transIn.vtx = (param.vtx);
this.transIn.sz = (param.sz);
this.transIn.rot = (param.rot);
this.transIn.pos = (param.pos);
};
threeD.prototype.vupd = function() {
this.transOut = trans.steps(
this.transIn.vtx,
this.transIn.sz,
this.transIn.rot,
this.transIn.pos,
cam.disp
);
};
var Build = function() {
this.vel = 0.04;
this.lim = 360;
this.diff = 200;
this.initPos = 100;
this.toX = _x;
this.toY = _y;
this.go();
};
Build.prototype.go = function() {
this.canvas = document.getElementById("canv");
this.canvas.width = window.innerWidth;
this.canvas.height = window.innerHeight;
this.$ = canv.getContext("2d");
this.$.globalCompositeOperation = 'source-over';
this.varr = [];
this.dist = [];
this.calc = [];
for (var i = 0, len = num; i < len; i++) {
this.add();
}
this.rotObj = {
x: 0,
y: 0,
z: 0
};
this.objSz = {
x: w / 5,
y: h / 5,
z: w / 5
};
};
Build.prototype.add = function() {
this.varr.push(new threeD({
vtx: {
x: rnd(),
y: rnd(),
z: rnd()
},
sz: {
x: 0,
y: 0,
z: 0
},
rot: {
x: 20,
y: -20,
z: 0
},
pos: {
x: this.diff * Math.sin(360 * Math.random() * Math.PI / 180),
y: this.diff * Math.sin(360 * Math.random() * Math.PI / 180),
z: this.diff * Math.sin(360 * Math.random() * Math.PI / 180)
}
}));
this.calc.push({
x: 360 * Math.random(),
y: 360 * Math.random(),
z: 360 * Math.random()
});
};
Build.prototype.upd = function() {
cam.obj.x += (this.toX - cam.obj.x) * 0.05;
cam.obj.y += (this.toY - cam.obj.y) * 0.05;
};
Build.prototype.draw = function() {
this.$.clearRect(0, 0, this.canvas.width, this.canvas.height);
cam.upd();
this.rotObj.x += 0.1;
this.rotObj.y += 0.1;
this.rotObj.z += 0.1;
for (var i = 0; i < this.varr.length; i++) {
for (var val in this.calc[i]) {
if (this.calc[i].hasOwnProperty(val)) {
this.calc[i][val] += this.vel;
if (this.calc[i][val] > this.lim) this.calc[i][val] = 0;
}
}
this.varr[i].transIn.pos = {
x: this.diff * Math.cos(this.calc[i].x * Math.PI / 180),
y: this.diff * Math.sin(this.calc[i].y * Math.PI / 180),
z: this.diff * Math.sin(this.calc[i].z * Math.PI / 180)
};
this.varr[i].transIn.rot = this.rotObj;
this.varr[i].transIn.sz = this.objSz;
this.varr[i].vupd();
if (this.varr[i].transOut.p < 0) continue;
var g = this.$.createRadialGradient(this.varr[i].transOut.x, this.varr[i].transOut.y, this.varr[i].transOut.p, this.varr[i].transOut.x, this.varr[i].transOut.y, this.varr[i].transOut.p * 2);
this.$.globalCompositeOperation = 'lighter';
g.addColorStop(0, 'hsla(255, 255%, 255%, 1)');
g.addColorStop(.5, 'hsla(' + (i + 2) + ',85%, 40%,1)');
g.addColorStop(1, 'hsla(' + (i) + ',85%, 40%,.5)');
this.$.fillStyle = g;
this.$.beginPath();
this.$.arc(this.varr[i].transOut.x, this.varr[i].transOut.y, this.varr[i].transOut.p * 2, 0, Math.PI * 2, false);
this.$.fill();
this.$.closePath();
}
};
Build.prototype.anim = function() {
window.requestAnimationFrame = (function() {
return window.requestAnimationFrame ||
function(callback, element) {
window.setTimeout(callback, 1000 / 60);
};
})();
var anim = function() {
this.upd();
this.draw();
window.requestAnimationFrame(anim);
}.bind(this);
window.requestAnimationFrame(anim);
};
Build.prototype.run = function() {
this.anim();
window.addEventListener('mousemove', function(e) {
this.toX = (e.clientX - this.canvas.width / 2) * -0.8;
this.toY = (e.clientY - this.canvas.height / 2) * 0.8;
}.bind(this));
window.addEventListener('touchmove', function(e) {
e.preventDefault();
this.toX = (e.touches[0].clientX - this.canvas.width / 2) * -0.8;
this.toY = (e.touches[0].clientY - this.canvas.height / 2) * 0.8;
}.bind(this));
window.addEventListener('mousedown', function(e) {
for (var i = 0; i < 100; i++) {
this.add();
}
}.bind(this));
window.addEventListener('touchstart', function(e) {
e.preventDefault();
for (var i = 0; i < 100; i++) {
this.add();
}
}.bind(this));
};
var app = new Build();
app.run();
})();
window.addEventListener('resize', function() {
canvas.width = w = window.innerWidth;
canvas.height = h = window.innerHeight;
}, false);
</script>
</body>
</html>
HTML代码(index5.html):
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>code5</title>
<style>
body {
background: #060e1b;
overflow: hidden;
}
canvas {
//opacity: 0.5;
}
/* Demo Buttons Style */
.codrops-demos {
font-size: 0.8em;
text-align:center;
position:absolute;
z-index:99;
width:96%;
}
.codrops-demos a {
display: inline-block;
margin: 0.35em 0.1em;
padding: 0.5em 1.2em;
outline: none;
text-decoration: none;
text-transform: uppercase;
letter-spacing: 1px;
font-weight: 700;
border-radius: 2px;
font-size: 110%;
border: 2px solid transparent;
color:#fff;
}
.codrops-demos a:hover,
.codrops-demos a.current-demo {
border-color: #383a3c;
}
</style>
</head>
<body>
<nav class="codrops-demos">
<a href="index.html">Demo 1</a>
<a href="index2.html">Demo 2</a>
<a href="index3.html">Demo 3</a>
<a href="index4.html">Demo 4</a>
<a class="current-demo" href="index5.html">Demo 5</a>
<a href="index6.html">Demo 6</a>
<a href="index7.html">Demo 7</a>
</nav>
<canvas id="canvas"></canvas>
<script>
"use strict";
var canvas = document.getElementById('canvas'),
ctx = canvas.getContext('2d'),
w = canvas.width = window.innerWidth,
h = canvas.height = window.innerHeight,
hue = 217,
stars = [],
count = 0,
maxStars = 1200;
var canvas2 = document.createElement('canvas'),
ctx2 = canvas2.getContext('2d');
canvas2.width = 100;
canvas2.height = 100;
var half = canvas2.width / 2,
gradient2 = ctx2.createRadialGradient(half, half, 0, half, half, half);
gradient2.addColorStop(0.025, '#fff');
gradient2.addColorStop(0.1, 'hsl(' + hue + ', 61%, 33%)');
gradient2.addColorStop(0.25, 'hsl(' + hue + ', 64%, 6%)');
gradient2.addColorStop(1, 'transparent');
ctx2.fillStyle = gradient2;
ctx2.beginPath();
ctx2.arc(half, half, half, 0, Math.PI * 2);
ctx2.fill();
// End cache
function random(min, max) {
if (arguments.length < 2) {
max = min;
min = 0;
}
if (min > max) {
var hold = max;
max = min;
min = hold;
}
return Math.floor(Math.random() * (max - min + 1)) + min;
}
function maxOrbit(x, y) {
var max = Math.max(x, y),
diameter = Math.round(Math.sqrt(max * max + max * max));
return diameter / 2;
}
var Star = function() {
this.orbitRadius = random(maxOrbit(w, h));
this.radius = random(60, this.orbitRadius) / 12;
this.orbitX = w / 2;
this.orbitY = h / 2;
this.timePassed = random(0, maxStars);
this.speed = random(this.orbitRadius) / 900000;
this.alpha = random(2, 10) / 10;
count++;
stars[count] = this;
}
Star.prototype.draw = function() {
var x = Math.sin(this.timePassed) * this.orbitRadius + this.orbitX,
y = Math.cos(this.timePassed) * this.orbitRadius + this.orbitY,
twinkle = random(10);
if (twinkle === 1 && this.alpha > 0) {
this.alpha -= 0.05;
} else if (twinkle === 2 && this.alpha < 1) {
this.alpha += 0.05;
}
ctx.globalAlpha = this.alpha;
ctx.drawImage(canvas2, x - this.radius / 2, y - this.radius / 2, this.radius, this.radius);
this.timePassed += this.speed;
}
for (var i = 0; i < maxStars; i++) {
new Star();
}
function animation() {
ctx.globalCompositeOperation = 'source-over';
ctx.globalAlpha = 0.8;
ctx.fillStyle = 'hsla(' + hue + ', 64%, 6%, 1)';
ctx.fillRect(0, 0, w, h)
ctx.globalCompositeOperation = 'lighter';
for (var i = 1, l = stars.length; i < l; i++) {
stars[i].draw();
};
window.requestAnimationFrame(animation);
}
animation();
</script>
</body>
</html>
HTML代码(index6.html):
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>code4</title>
<script src="js/jquery.min.js"></script>
<style>
html, body { background: #000; margin: 0; padding:0;}
canvas { width: 100%; height: 100%; position: absolute; }
/* Demo Buttons Style */
.codrops-demos {
font-size: 0.8em;
text-align:center;
position:absolute;
z-index:99;
width:96%;
}
.codrops-demos a {
display: inline-block;
margin: 0.35em 0.1em;
padding: 0.5em 1.2em;
outline: none;
text-decoration: none;
text-transform: uppercase;
letter-spacing: 1px;
font-weight: 700;
border-radius: 2px;
font-size: 110%;
border: 2px solid transparent;
color:#fff;
}
.codrops-demos a:hover,
.codrops-demos a.current-demo {
border-color: #383a3c;
}
</style>
</head>
<body>
<nav class="codrops-demos">
<a href="index.html">Demo 1</a>
<a href="index2.html">Demo 2</a>
<a href="index3.html">Demo 3</a>
<a href="index4.html">Demo 4</a>
<a href="index5.html">Demo 5</a>
<a class="current-demo" href="index6.html">Demo 6</a>
<a href="index7.html">Demo 7</a>
</nav>
<canvas></canvas>
<script>
$(function(){
var canvas = document.querySelector('canvas'),
ctx = canvas.getContext('2d')
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
ctx.lineWidth = .3;
ctx.strokeStyle = (new Color(150)).style;
var mousePosition = {
x: 30 * canvas.width / 100,
y: 30 * canvas.height / 100
};
var dots = {
nb: 750,
distance: 50,
d_radius: 100,
array: []
};
function colorValue(min) {
return Math.floor(Math.random() * 255 + min);
}
function createColorStyle(r,g,b) {
return 'rgba(' + r + ',' + g + ',' + b + ', 0.8)';
}
function mixComponents(comp1, weight1, comp2, weight2) {
return (comp1 * weight1 + comp2 * weight2) / (weight1 + weight2);
}
function averageColorStyles(dot1, dot2) {
var color1 = dot1.color,
color2 = dot2.color;
var r = mixComponents(color1.r, dot1.radius, color2.r, dot2.radius),
g = mixComponents(color1.g, dot1.radius, color2.g, dot2.radius),
b = mixComponents(color1.b, dot1.radius, color2.b, dot2.radius);
return createColorStyle(Math.floor(r), Math.floor(g), Math.floor(b));
}
function Color(min) {
min = min || 0;
this.r = colorValue(min);
this.g = colorValue(min);
this.b = colorValue(min);
this.style = createColorStyle(this.r, this.g, this.b);
}
function Dot(){
this.x = Math.random() * canvas.width;
this.y = Math.random() * canvas.height;
this.vx = -.5 + Math.random();
this.vy = -.5 + Math.random();
this.radius = Math.random() * 2;
this.color = new Color();
console.log(this);
}
Dot.prototype = {
draw: function(){
ctx.beginPath();
ctx.fillStyle = this.color.style;
ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2, false);
ctx.fill();
}
};
function createDots(){
for(i = 0; i < dots.nb; i++){
dots.array.push(new Dot());
}
}
function moveDots() {
for(i = 0; i < dots.nb; i++){
var dot = dots.array[i];
if(dot.y < 0 || dot.y > canvas.height){
dot.vx = dot.vx;
dot.vy = - dot.vy;
}
else if(dot.x < 0 || dot.x > canvas.width){
dot.vx = - dot.vx;
dot.vy = dot.vy;
}
dot.x += dot.vx;
dot.y += dot.vy;
}
}
function connectDots() {
for(i = 0; i < dots.nb; i++){
for(j = 0; j < dots.nb; j++){
i_dot = dots.array[i];
j_dot = dots.array[j];
if((i_dot.x - j_dot.x) < dots.distance && (i_dot.y - j_dot.y) < dots.distance && (i_dot.x - j_dot.x) > - dots.distance && (i_dot.y - j_dot.y) > - dots.distance){
if((i_dot.x - mousePosition.x) < dots.d_radius && (i_dot.y - mousePosition.y) < dots.d_radius && (i_dot.x - mousePosition.x) > - dots.d_radius && (i_dot.y - mousePosition.y) > - dots.d_radius){
ctx.beginPath();
ctx.strokeStyle = averageColorStyles(i_dot, j_dot);
ctx.moveTo(i_dot.x, i_dot.y);
ctx.lineTo(j_dot.x, j_dot.y);
ctx.stroke();
ctx.closePath();
}
}
}
}
}
function drawDots() {
for(i = 0; i < dots.nb; i++){
var dot = dots.array[i];
dot.draw();
}
}
function animateDots() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
moveDots();
connectDots();
drawDots();
requestAnimationFrame(animateDots);
}
$('canvas').on('mousemove', function(e){
mousePosition.x = e.pageX;
mousePosition.y = e.pageY;
});
$('canvas').on('mouseleave', function(e){
mousePosition.x = canvas.width / 2;
mousePosition.y = canvas.height / 2;
});
createDots();
requestAnimationFrame(animateDots);
});
</script>
</body>
</html>
HTML代码(index7.html):
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>code5</title>
<style>
body {
background: #060e1b;
overflow: hidden;
}
canvas {
//opacity: 0.5;
}
/* Demo Buttons Style */
.codrops-demos {
font-size: 0.8em;
text-align:center;
position:absolute;
z-index:99;
width:96%;
}
.codrops-demos a {
display: inline-block;
margin: 0.35em 0.1em;
padding: 0.5em 1.2em;
outline: none;
text-decoration: none;
text-transform: uppercase;
letter-spacing: 1px;
font-weight: 700;
border-radius: 2px;
font-size: 110%;
border: 2px solid transparent;
color:#fff;
}
.codrops-demos a:hover,
.codrops-demos a.current-demo {
border-color: #383a3c;
}
</style>
</head>
<body>
<nav class="codrops-demos">
<a href="index.html">Demo 1</a>
<a href="index2.html">Demo 2</a>
<a href="index3.html">Demo 3</a>
<a href="index4.html">Demo 4</a>
<a href="index5.html">Demo 5</a>
<a href="index6.html">Demo 6</a>
<a class="current-demo" href="index7.html">Demo 7</a>
</nav>
<canvas id="canvas"></canvas>
<script>
"use strict";
var canvas = document.getElementById('canvas'),
ctx = canvas.getContext('2d'),
w = canvas.width = window.innerWidth,
h = canvas.height = window.innerHeight,
hue = 217,
stars = [],
count = 0,
maxStars = 1400;
// Thanks @jackrugile for the performance tip! http://codepen.io/jackrugile/pen/BjBGoM
// Cache gradient
var canvas2 = document.createElement('canvas'),
ctx2 = canvas2.getContext('2d');
canvas2.width = 100;
canvas2.height = 100;
var half = canvas2.width/2,
gradient2 = ctx2.createRadialGradient(half, half, 0, half, half, half);
gradient2.addColorStop(0.025, '#fff');
gradient2.addColorStop(0.1, 'hsl(' + hue + ', 61%, 33%)');
gradient2.addColorStop(0.25, 'hsl(' + hue + ', 64%, 6%)');
gradient2.addColorStop(1, 'transparent');
ctx2.fillStyle = gradient2;
ctx2.beginPath();
ctx2.arc(half, half, half, 0, Math.PI * 2);
ctx2.fill();
// End cache
function random(min, max) {
if (arguments.length < 2) {
max = min;
min = 0;
}
if (min > max) {
var hold = max;
max = min;
min = hold;
}
return Math.floor(Math.random() * (max - min + 1)) + min;
}
var Star = function() {
this.orbitRadius = random(w / 2 - 50);
this.radius = random(100, this.orbitRadius) / 10;
this.orbitX = w / 2;
this.orbitY = h / 2;
this.timePassed = random(0, maxStars);
this.speed = random(this.orbitRadius) / 900000;
this.alpha = random(2, 10) / 10;
count++;
stars[count] = this;
}
Star.prototype.draw = function() {
var x = Math.sin(this.timePassed + 1) * this.orbitRadius + this.orbitX,
y = Math.cos(this.timePassed) * this.orbitRadius/2 + this.orbitY,
twinkle = random(10);
if (twinkle === 1 && this.alpha > 0) {
this.alpha -= 0.05;
} else if (twinkle === 2 && this.alpha < 1) {
this.alpha += 0.05;
}
ctx.globalAlpha = this.alpha;
ctx.drawImage(canvas2, x - this.radius / 2, y - this.radius / 2, this.radius, this.radius);
this.timePassed += this.speed;
}
for (var i = 0; i < maxStars; i++) {
new Star();
}
function animation() {
ctx.globalCompositeOperation = 'source-over';
ctx.globalAlpha = 0.8;
ctx.fillStyle = 'hsla(' + hue + ', 64%, 6%, 1)';
ctx.fillRect(0, 0, w, h)
ctx.globalCompositeOperation = 'lighter';
for (var i = 1, l = stars.length; i < l; i++) {
stars[i].draw();
};
window.requestAnimationFrame(animation);
}
animation();
</script>
</body>
</html>
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